INFO: task udevd:3623 blocked for more than 143 seconds.
Not tainted 6.1.141-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:udevd state:D stack:23040 pid:3623 ppid:1 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x10e9/0x40d0 kernel/sched/core.c:6561
schedule+0xb9/0x180 kernel/sched/core.c:6637
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6696
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0x555/0xaf0 kernel/locking/mutex.c:747
device_lock include/linux/device.h:837 [inline]
uevent_show+0x16c/0x320 drivers/base/core.c:2669
dev_attr_show+0x50/0xb0 drivers/base/core.c:2372
sysfs_kf_seq_show+0x349/0x4b0 fs/sysfs/file.c:59
seq_read_iter+0x49b/0xd50 fs/seq_file.c:230
call_read_iter include/linux/fs.h:2259 [inline]
new_sync_read fs/read_write.c:389 [inline]
vfs_read+0x434/0x920 fs/read_write.c:470
ksys_read+0x143/0x240 fs/read_write.c:613
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f7dc54a7407
RSP: 002b:00007ffe6c380780 EFLAGS: 00000202 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007f7dc5bc3880 RCX: 00007f7dc54a7407
RDX: 0000000000001000 RSI: 0000556cc61c7f20 RDI: 000000000000000c
RBP: 00007f7dc55efff0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 000000000000000a
R13: 00007f7dc55efea0 R14: 0000000000000000 R15: 0000556cc61c91c0
INFO: task kworker/1:4:4299 blocked for more than 143 seconds.
Not tainted 6.1.141-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:4 state:D stack:23632 pid:4299 ppid:2 flags:0x00004000
Workqueue: events rfkill_global_led_trigger_worker
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x10e9/0x40d0 kernel/sched/core.c:6561
schedule+0xb9/0x180 kernel/sched/core.c:6637
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6696
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0x555/0xaf0 kernel/locking/mutex.c:747
rfkill_global_led_trigger_worker+0x23/0xc0 net/rfkill/core.c:181
process_one_work+0x898/0x1160 kernel/workqueue.c:2292
worker_thread+0xaa2/0x1250 kernel/workqueue.c:2439
kthread+0x29d/0x330 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
INFO: task syz.1.1153:7866 blocked for more than 143 seconds.
Not tainted 6.1.141-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.1153 state:D stack:25568 pid:7866 ppid:4252 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x10e9/0x40d0 kernel/sched/core.c:6561
schedule+0xb9/0x180 kernel/sched/core.c:6637
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6696
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0x555/0xaf0 kernel/locking/mutex.c:747
device_lock include/linux/device.h:837 [inline]
nfc_dev_down net/nfc/core.c:143 [inline]
nfc_rfkill_set_block+0x4c/0x2d0 net/nfc/core.c:179
rfkill_set_block+0x1c6/0x420 net/rfkill/core.c:345
rfkill_fop_write+0x458/0x560 net/rfkill/core.c:1286
vfs_write+0x2c4/0x960 fs/read_write.c:582
ksys_write+0x143/0x240 fs/read_write.c:637
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f723178e929
RSP: 002b:00007f723255f038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f72319b5fa0 RCX: 00007f723178e929
RDX: 0000000000000008 RSI: 0000200000000080 RDI: 0000000000000008
RBP: 00007f7231810b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f72319b5fa0 R15: 00007ffc9520c5b8
INFO: task syz.3.1154:7872 blocked for more than 144 seconds.
Not tainted 6.1.141-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.1154 state:D stack:26240 pid:7872 ppid:4253 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x10e9/0x40d0 kernel/sched/core.c:6561
schedule+0xb9/0x180 kernel/sched/core.c:6637
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6696
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0x555/0xaf0 kernel/locking/mutex.c:747
rfkill_unregister+0xc4/0x220 net/rfkill/core.c:1130
nfc_unregister_device+0x92/0x290 net/nfc/core.c:1167
virtual_ncidev_close+0x55/0x90 drivers/nfc/virtual_ncidev.c:170
__fput+0x22c/0x920 fs/file_table.c:320
task_work_run+0x1ca/0x250 kernel/task_work.c:203
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303
do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:87
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f6690b8e929
RSP: 002b:00007ffd10c874c8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f6690db7ba0 RCX: 00007f6690b8e929
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f6690db7ba0 R08: 0000000000000370 R09: 0000000510c877bf
R10: 00000000003ffa6c R11: 0000000000000246 R12: 0000000000048607
R13: 00007f6690db6080 R14: ffffffffffffffff R15: 00007ffd10c875e0
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8c92b430 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x33/0xf00 kernel/rcu/tasks.h:517
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8c92bc50 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x33/0xf00 kernel/rcu/tasks.h:517
1 lock held by khungtaskd/28:
#0: ffffffff8c92aaa0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
#0: ffffffff8c92aaa0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline]
#0: ffffffff8c92aaa0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x290 kernel/locking/lockdep.c:6513
4 locks held by udevd/3623:
#0: ffff8880780c0540 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xad/0xd50 fs/seq_file.c:182
#1: ffff888028146c88 (&of->mutex){+.+.}-{3:3}, at: kernfs_seq_start+0x51/0x3b0 fs/kernfs/file.c:154
#2: ffff88807d9e42c0 (kn->active#5){.+.+}-{0:0}, at: kernfs_seq_start+0x71/0x3b0 fs/kernfs/file.c:155
#3: ffff888076a78100 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:837 [inline]
#3: ffff888076a78100 (&dev->mutex){....}-{3:3}, at: uevent_show+0x16c/0x320 drivers/base/core.c:2669
2 locks held by getty/4014:
#0: ffff88807e218098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc9000326b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x41b/0x1380 drivers/tty/n_tty.c:2198
3 locks held by kworker/1:4/4299:
#0: ffff888017470938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7a1/0x1160 kernel/workqueue.c:2267
#1: ffffc90004807d00 ((work_completion)(&rfkill_global_led_trigger_work)){+.+.}-{0:0}, at: process_one_work+0x7a1/0x1160 kernel/workqueue.c:2267
#2: ffffffff8ddefc68 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_global_led_trigger_worker+0x23/0xc0 net/rfkill/core.c:181
2 locks held by kworker/u4:6/4313:
2 locks held by syz.1.1153/7866:
#0: ffffffff8ddefc68 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0x19e/0x560 net/rfkill/core.c:1278
#1: ffff888076a78100 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:837 [inline]
#1: ffff888076a78100 (&dev->mutex){....}-{3:3}, at: nfc_dev_down net/nfc/core.c:143 [inline]
#1: ffff888076a78100 (&dev->mutex){....}-{3:3}, at: nfc_rfkill_set_block+0x4c/0x2d0 net/nfc/core.c:179
2 locks held by syz.3.1154/7872:
#0: ffff888076a78100 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:837 [inline]
#0: ffff888076a78100 (&dev->mutex){....}-{3:3}, at: nfc_unregister_device+0x5f/0x290 net/nfc/core.c:1165
#1: ffffffff8ddefc68 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_unregister+0xc4/0x220 net/rfkill/core.c:1130
2 locks held by syz-executor/8191:
#0: ffff8880555f6118 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device+0x34/0x740 drivers/bluetooth/hci_vhci.c:378
#1: ffffffff8ddefc68 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x33/0x8a0 net/rfkill/core.c:1057
2 locks held by syz-executor/8199:
#0: ffff8880576bb118 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device+0x34/0x740 drivers/bluetooth/hci_vhci.c:378
#1: ffffffff8ddefc68 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x33/0x8a0 net/rfkill/core.c:1057
2 locks held by syz-executor/9320:
#0: ffff8880778b4118 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device+0x34/0x740 drivers/bluetooth/hci_vhci.c:378
#1: ffffffff8ddefc68 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x33/0x8a0 net/rfkill/core.c:1057
2 locks held by syz-executor/9323:
#0: ffff88802882a118 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device+0x34/0x740 drivers/bluetooth/hci_vhci.c:378
#1: ffffffff8ddefc68 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x33/0x8a0 net/rfkill/core.c:1057
2 locks held by syz-executor/10104:
#0: ffff88805522a918 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device+0x34/0x740 drivers/bluetooth/hci_vhci.c:378
#1: ffffffff8ddefc68 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x33/0x8a0 net/rfkill/core.c:1057
2 locks held by syz-executor/10105:
#0: ffff88805522e918 (&data->open_mutex){+.+.}-{3:3}, at: vhci_create_device+0x34/0x740 drivers/bluetooth/hci_vhci.c:378
#1: ffffffff8ddefc68 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x33/0x8a0 net/rfkill/core.c:1057
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.1.141-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
dump_stack_lvl+0x168/0x22e lib/dump_stack.c:106
nmi_cpu_backtrace+0x3f4/0x470 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1d4/0x450 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
watchdog+0xeee/0xf30 kernel/hung_task.c:377
kthread+0x29d/0x330 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4313 Comm: kworker/u4:6 Not tainted 6.1.141-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: krdsd rds_connect_worker
RIP: 0010:unwind_next_frame+0x97c/0x20b0 arch/x86/kernel/unwind_orc.c:-1
Code: 84 c0 0f 85 72 11 00 00 4d 89 f7 49 c1 ef 03 43 0f b6 04 2f 84 c0 0f 85 7d 11 00 00 0f b6 45 01 83 e0 03 ff 24 c5 30 6f 69 8a <4c> 89 74 24 70 4c 89 64 24 20 4c 8d 73 08 4d 89 f4 49 c1 ec 03 43
RSP: 0018:ffffc90004857390 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffc90004857468 RCX: ffffffff8e632434
RDX: ffffc90004857a60 RSI: ffffffff8e632420 RDI: 0000000000000001
RBP: ffffffff8efcf854 R08: 0000000000000010 R09: 0000000000000009
R10: fffff5200090ae99 R11: 1ffff9200090ae97 R12: ffffffff8efcf850
R13: dffffc0000000000 R14: ffffffff8efcf855 R15: 1ffffffff1df9f0a
FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff2b1d7e2d8 CR3: 000000000c68e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
arch_stack_walk+0x10c/0x140 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x98/0xe0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
kasan_save_free_info+0x2d/0x50 mm/kasan/generic.c:516
____kasan_slab_free+0x126/0x1e0 mm/kasan/common.c:236
kasan_slab_free include/linux/kasan.h:177 [inline]
slab_free_hook mm/slub.c:1724 [inline]
slab_free_freelist_hook+0x131/0x1a0 mm/slub.c:1750
slab_free mm/slub.c:3661 [inline]
kmem_cache_free+0xf7/0x290 mm/slub.c:3683
inet_bind2_bucket_destroy net/ipv4/inet_hashtables.c:144 [inline]
__inet_put_port net/ipv4/inet_hashtables.c:206 [inline]
inet_put_port+0x68a/0x780 net/ipv4/inet_hashtables.c:216
tcp_v4_destroy_sock+0x48c/0x760 net/ipv4/tcp_ipv4.c:2292
inet_csk_destroy_sock+0x15c/0x390 net/ipv4/inet_connection_sock.c:1237
__tcp_close+0xb00/0xdc0 net/ipv4/tcp.c:3065
tcp_close+0x24/0x110 net/ipv4/tcp.c:3077
inet_release+0x17c/0x1f0 net/ipv4/af_inet.c:430
__sock_release net/socket.c:654 [inline]
sock_release+0x7b/0x140 net/socket.c:682
rds_tcp_conn_path_connect+0x37a/0x680 net/rds/tcp_connect.c:191
rds_connect_worker+0x1ce/0x280 net/rds/threads.c:176
process_one_work+0x898/0x1160 kernel/workqueue.c:2292
worker_thread+0xaa2/0x1250 kernel/workqueue.c:2439
kthread+0x29d/0x330 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295