kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
------------[ cut here ]------------
WARNING: net/bluetooth/hci_conn.c:631 at hci_conn_timeout+0xfc/0x20c net/bluetooth/hci_conn.c:631, CPU#1: kworker/u9:0/50
Modules linked in:
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_conn_timeout
pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
pc : hci_conn_timeout+0xfc/0x20c net/bluetooth/hci_conn.c:631
lr : hci_conn_timeout+0xfc/0x20c net/bluetooth/hci_conn.c:631
sp : ffff800090247b20
x29: ffff800090247b20 x28: 1fffe0001862c090 x27: 0000000000000000
x26: ffff0000c2dd0958 x25: ffff0000f0590a40 x24: 1fffe0001c11bb81
x23: ffff0000c3160000 x22: dfff800000000000 x21: 00000000ffffffff
x20: ffff0000f0590a40 x19: ffff0000f0590000 x18: 00000000ffffffff
x17: ffff80008a791000 x16: 0000000000000002 x15: ffff80008a31ada0
x14: ffff80008a590e28 x13: 0000000000000001 x12: 0000000000000000
x11: 0000000000000000 x10: ffff60001e0b2003 x9 : 0000000000000000
x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000
x5 : ffff80008a7af5c8 x4 : 0000000000000008 x3 : ffff800085b2ea58
x2 : 00000000ffffffff x1 : ffff0000c3160000 x0 : 0000000000000000
Call trace:
 hci_conn_timeout+0xfc/0x20c net/bluetooth/hci_conn.c:631 (P)
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
irq event stamp: 27318
hardirqs last  enabled at (27317): [<ffff80008690b54c>] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:187 [inline]
hardirqs last  enabled at (27317): [<ffff80008690b54c>] _raw_spin_unlock_irq+0x30/0x80 kernel/locking/spinlock.c:206
hardirqs last disabled at (27318): [<ffff8000868e6198>] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:425
softirqs last  enabled at (27232): [<ffff800084c14ca8>] __alloc_skb+0x1c0/0x610 net/core/skbuff.c:698
softirqs last disabled at (27230): [<ffff800084c14c90>] local_bh_disable include/linux/bottom_half.h:20 [inline]
softirqs last disabled at (27230): [<ffff800084c14c90>] __alloc_skb+0x1a8/0x610 net/core/skbuff.c:697
---[ end trace 0000000000000000 ]---
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
Bluetooth: hci0: command 0x041b tx timeout
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
Bluetooth: hci1: command tx timeout
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
Bluetooth: hci0: command 0x041b tx timeout
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci0/hci0:0'
CPU: 1 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Workqueue: hci0 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 sysfs_warn_dup+0x9c/0xb8 fs/sysfs/dir.c:30
 sysfs_create_dir_ns+0x190/0x1f4 fs/sysfs/dir.c:63
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x290/0x6f0 lib/kobject.c:240
 kobject_add_varg+0x9c/0xe8 lib/kobject.c:374
 kobject_add+0x110/0x1c8 lib/kobject.c:426
 device_add+0x394/0x9e0 drivers/base/core.c:3695
 hci_conn_add_sysfs+0xbc/0x1e8 net/bluetooth/hci_sysfs.c:48
 le_conn_complete_evt+0xc68/0x10f8 net/bluetooth/hci_event.c:5848
 hci_le_enh_conn_complete_evt+0x114/0x3d8 net/bluetooth/hci_event.c:5893
 hci_le_meta_evt+0x2b0/0x46c net/bluetooth/hci_event.c:7517
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x4c0/0x9c8 net/bluetooth/hci_event.c:7835
 hci_rx_work+0x2f4/0xd78 net/bluetooth/hci_core.c:4039
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
kobject: kobject_add_internal failed for hci0:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device