======================================================
WARNING: possible circular locking dependency detected
6.14.0-rc1-syzkaller-00028-g5c8c229261f1 #0 Not tainted
------------------------------------------------------
kworker/u33:0/65 is trying to acquire lock:
ffff888065fb6258 (sk_lock-AF_BLUETOOTH-BTPROTO_SCO){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1624 [inline]
ffff888065fb6258 (sk_lock-AF_BLUETOOTH-BTPROTO_SCO){+.+.}-{0:0}, at: sco_conn_ready net/bluetooth/sco.c:1341 [inline]
ffff888065fb6258 (sk_lock-AF_BLUETOOTH-BTPROTO_SCO){+.+.}-{0:0}, at: sco_connect_cfm+0x3bc/0xc00 net/bluetooth/sco.c:1415
but task is already holding lock:
ffff88811c339820 (&conn->lock#2){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:351 [inline]
ffff88811c339820 (&conn->lock#2){+.+.}-{3:3}, at: sco_conn_ready net/bluetooth/sco.c:1328 [inline]
ffff88811c339820 (&conn->lock#2){+.+.}-{3:3}, at: sco_connect_cfm+0x29f/0xc00 net/bluetooth/sco.c:1415
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #1 (&conn->lock#2){+.+.}-{3:3}:
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:351 [inline]
sco_chan_add net/bluetooth/sco.c:292 [inline]
sco_connect net/bluetooth/sco.c:348 [inline]
sco_sock_connect+0x3b2/0xcc0 net/bluetooth/sco.c:648
__sys_connect_file+0x13e/0x1a0 net/socket.c:2040
__sys_connect+0x14f/0x170 net/socket.c:2059
__do_sys_connect net/socket.c:2065 [inline]
__se_sys_connect net/socket.c:2062 [inline]
__x64_sys_connect+0x72/0xb0 net/socket.c:2062
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> #0 (sk_lock-AF_BLUETOOTH-BTPROTO_SCO){+.+.}-{0:0}:
check_prev_add kernel/locking/lockdep.c:3163 [inline]
check_prevs_add kernel/locking/lockdep.c:3282 [inline]
validate_chain kernel/locking/lockdep.c:3906 [inline]
__lock_acquire+0x249e/0x3c40 kernel/locking/lockdep.c:5228
lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5851
lock_sock_nested+0x3a/0xf0 net/core/sock.c:3645
lock_sock include/net/sock.h:1624 [inline]
sco_conn_ready net/bluetooth/sco.c:1341 [inline]
sco_connect_cfm+0x3bc/0xc00 net/bluetooth/sco.c:1415
hci_connect_cfm include/net/bluetooth/hci_core.h:2051 [inline]
hci_sync_conn_complete_evt+0x421/0xa80 net/bluetooth/hci_event.c:5014
hci_event_func net/bluetooth/hci_event.c:7473 [inline]
hci_event_packet+0x9eb/0x1180 net/bluetooth/hci_event.c:7525
hci_rx_work+0x2c5/0x16b0 net/bluetooth/hci_core.c:4015
process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3236
process_scheduled_works kernel/workqueue.c:3317 [inline]
worker_thread+0x6c8/0xf00 kernel/workqueue.c:3398
kthread+0x3af/0x750 kernel/kthread.c:464
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&conn->lock#2);
lock(sk_lock-AF_BLUETOOTH-BTPROTO_SCO);
lock(&conn->lock#2);
lock(sk_lock-AF_BLUETOOTH-BTPROTO_SCO);
*** DEADLOCK ***
4 locks held by kworker/u33:0/65:
#0: ffff888025032948 ((wq_completion)hci4#2){+.+.}-{0:0}, at: process_one_work+0x1293/0x1ba0 kernel/workqueue.c:3211
#1: ffffc90000d2fd18 ((work_completion)(&hdev->rx_work)){+.+.}-{0:0}, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3212
#2: ffff8880658c0078 (&hdev->lock){+.+.}-{4:4}, at: hci_sync_conn_complete_evt+0x199/0xa80 net/bluetooth/hci_event.c:4931
#3: ffff88811c339820 (&conn->lock#2){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:351 [inline]
#3: ffff88811c339820 (&conn->lock#2){+.+.}-{3:3}, at: sco_conn_ready net/bluetooth/sco.c:1328 [inline]
#3: ffff88811c339820 (&conn->lock#2){+.+.}-{3:3}, at: sco_connect_cfm+0x29f/0xc00 net/bluetooth/sco.c:1415
stack backtrace:
CPU: 0 UID: 0 PID: 65 Comm: kworker/u33:0 Not tainted 6.14.0-rc1-syzkaller-00028-g5c8c229261f1 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Workqueue: hci4 hci_rx_work
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_circular_bug+0x490/0x760 kernel/locking/lockdep.c:2076
check_noncircular+0x31a/0x400 kernel/locking/lockdep.c:2208
check_prev_add kernel/locking/lockdep.c:3163 [inline]
check_prevs_add kernel/locking/lockdep.c:3282 [inline]
validate_chain kernel/locking/lockdep.c:3906 [inline]
__lock_acquire+0x249e/0x3c40 kernel/locking/lockdep.c:5228
lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5851
lock_sock_nested+0x3a/0xf0 net/core/sock.c:3645
lock_sock include/net/sock.h:1624 [inline]
sco_conn_ready net/bluetooth/sco.c:1341 [inline]
sco_connect_cfm+0x3bc/0xc00 net/bluetooth/sco.c:1415
hci_connect_cfm include/net/bluetooth/hci_core.h:2051 [inline]
hci_sync_conn_complete_evt+0x421/0xa80 net/bluetooth/hci_event.c:5014
hci_event_func net/bluetooth/hci_event.c:7473 [inline]
hci_event_packet+0x9eb/0x1180 net/bluetooth/hci_event.c:7525
hci_rx_work+0x2c5/0x16b0 net/bluetooth/hci_core.c:4015
process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3236
process_scheduled_works kernel/workqueue.c:3317 [inline]
worker_thread+0x6c8/0xf00 kernel/workqueue.c:3398
kthread+0x3af/0x750 kernel/kthread.c:464
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
BUG: sleeping function called from invalid context at net/core/sock.c:3647
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 65, name: kworker/u33:0
preempt_count: 1, expected: 0
RCU nest depth: 0, expected: 0
INFO: lockdep is turned off.
Preemption disabled at:
[<0000000000000000>] 0x0
CPU: 0 UID: 0 PID: 65 Comm: kworker/u33:0 Not tainted 6.14.0-rc1-syzkaller-00028-g5c8c229261f1 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Workqueue: hci4 hci_rx_work
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:120
__might_resched+0x3c0/0x5e0 kernel/sched/core.c:8766
lock_sock_nested+0x4b/0xf0 net/core/sock.c:3647
lock_sock include/net/sock.h:1624 [inline]
sco_conn_ready net/bluetooth/sco.c:1341 [inline]
sco_connect_cfm+0x3bc/0xc00 net/bluetooth/sco.c:1415
hci_connect_cfm include/net/bluetooth/hci_core.h:2051 [inline]
hci_sync_conn_complete_evt+0x421/0xa80 net/bluetooth/hci_event.c:5014
hci_event_func net/bluetooth/hci_event.c:7473 [inline]
hci_event_packet+0x9eb/0x1180 net/bluetooth/hci_event.c:7525
hci_rx_work+0x2c5/0x16b0 net/bluetooth/hci_core.c:4015
process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3236
process_scheduled_works kernel/workqueue.c:3317 [inline]
worker_thread+0x6c8/0xf00 kernel/workqueue.c:3398
kthread+0x3af/0x750 kernel/kthread.c:464
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
==================================================================
BUG: KASAN: slab-use-after-free in debug_spin_lock_before kernel/locking/spinlock_debug.c:86 [inline]
BUG: KASAN: slab-use-after-free in do_raw_spin_lock+0x271/0x2c0 kernel/locking/spinlock_debug.c:115
Read of size 4 at addr ffff888065fb61c4 by task kworker/u33:0/65
CPU: 0 UID: 0 PID: 65 Comm: kworker/u33:0 Tainted: G W 6.14.0-rc1-syzkaller-00028-g5c8c229261f1 #0
Tainted: [W]=WARN
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Workqueue: hci4 hci_rx_work
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:378 [inline]
print_report+0xc3/0x620 mm/kasan/report.c:489
kasan_report+0xd9/0x110 mm/kasan/report.c:602
debug_spin_lock_before kernel/locking/spinlock_debug.c:86 [inline]
do_raw_spin_lock+0x271/0x2c0 kernel/locking/spinlock_debug.c:115
spin_lock_bh include/linux/spinlock.h:356 [inline]
lock_sock_nested+0x5f/0xf0 net/core/sock.c:3648
lock_sock include/net/sock.h:1624 [inline]
sco_conn_ready net/bluetooth/sco.c:1341 [inline]
sco_connect_cfm+0x3bc/0xc00 net/bluetooth/sco.c:1415
hci_connect_cfm include/net/bluetooth/hci_core.h:2051 [inline]
hci_sync_conn_complete_evt+0x421/0xa80 net/bluetooth/hci_event.c:5014
hci_event_func net/bluetooth/hci_event.c:7473 [inline]
hci_event_packet+0x9eb/0x1180 net/bluetooth/hci_event.c:7525
hci_rx_work+0x2c5/0x16b0 net/bluetooth/hci_core.c:4015
process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3236
process_scheduled_works kernel/workqueue.c:3317 [inline]
worker_thread+0x6c8/0xf00 kernel/workqueue.c:3398
kthread+0x3af/0x750 kernel/kthread.c:464
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Allocated by task 15216:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394
kasan_kmalloc include/linux/kasan.h:260 [inline]
__do_kmalloc_node mm/slub.c:4294 [inline]
__kmalloc_noprof+0x21c/0x510 mm/slub.c:4306
kmalloc_noprof include/linux/slab.h:905 [inline]
sk_prot_alloc+0x1a8/0x2a0 net/core/sock.c:2181
sk_alloc+0x36/0xb90 net/core/sock.c:2234
bt_sock_alloc+0x3b/0x3a0 net/bluetooth/af_bluetooth.c:148
sco_sock_alloc net/bluetooth/sco.c:552 [inline]
sco_sock_create+0xe3/0x3c0 net/bluetooth/sco.c:583
bt_sock_create+0x182/0x350 net/bluetooth/af_bluetooth.c:132
__sock_create+0x335/0x8d0 net/socket.c:1543
sock_create net/socket.c:1601 [inline]
__sys_socket_create net/socket.c:1638 [inline]
__sys_socket+0x14f/0x260 net/socket.c:1685
__do_sys_socket net/socket.c:1699 [inline]
__se_sys_socket net/socket.c:1697 [inline]
__x64_sys_socket+0x72/0xb0 net/socket.c:1697
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 15216:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2353 [inline]
slab_free mm/slub.c:4609 [inline]
kfree+0x2c4/0x4d0 mm/slub.c:4757
sk_prot_free net/core/sock.c:2217 [inline]
__sk_destruct+0x5eb/0x720 net/core/sock.c:2309
sk_destruct+0xc2/0xf0 net/core/sock.c:2324
__sk_free+0xf4/0x3e0 net/core/sock.c:2335
sk_free+0x6a/0x90 net/core/sock.c:2346
sock_put include/net/sock.h:1913 [inline]
sco_sock_kill net/bluetooth/sco.c:494 [inline]
sco_sock_kill+0x11a/0x1c0 net/bluetooth/sco.c:484
sco_sock_release+0x154/0x2d0 net/bluetooth/sco.c:1310
__sock_release+0xb0/0x270 net/socket.c:642
sock_close+0x1c/0x30 net/socket.c:1393
__fput+0x3ff/0xb70 fs/file_table.c:448
task_work_run+0x14e/0x250 kernel/task_work.c:227
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0xad8/0x2d70 kernel/exit.c:938
do_group_exit+0xd3/0x2a0 kernel/exit.c:1087
get_signal+0x24ed/0x26c0 kernel/signal.c:3036
arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x150/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff888065fb6000
which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 452 bytes inside of
freed 2048-byte region [ffff888065fb6000, ffff888065fb6800)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x65fb0
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff88801b042f00 ffffea0001376400 dead000000000002
raw: 0000000000000000 0000000080080008 00000000f5000000 0000000000000000
head: 00fff00000000040 ffff88801b042f00 ffffea0001376400 dead000000000002
head: 0000000000000000 0000000080080008 00000000f5000000 0000000000000000
head: 00fff00000000003 ffffea000197ec01 ffffffffffffffff 0000000000000000
head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 14020, tgid 14019 (syz.2.2358), ts 182705538361, free_ts 182704866433
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x181/0x1b0 mm/page_alloc.c:1551
prep_new_page mm/page_alloc.c:1559 [inline]
get_page_from_freelist+0xfce/0x2f80 mm/page_alloc.c:3477
__alloc_frozen_pages_noprof+0x221/0x2470 mm/page_alloc.c:4739
alloc_pages_mpol+0x1fc/0x540 mm/mempolicy.c:2270
alloc_slab_page mm/slub.c:2423 [inline]
allocate_slab mm/slub.c:2587 [inline]
new_slab+0x23d/0x330 mm/slub.c:2640
___slab_alloc+0xc5d/0x1720 mm/slub.c:3826
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3916
__slab_alloc_node mm/slub.c:3991 [inline]
slab_alloc_node mm/slub.c:4152 [inline]
__do_kmalloc_node mm/slub.c:4293 [inline]
__kmalloc_node_track_caller_noprof+0x2f1/0x510 mm/slub.c:4313
kmalloc_reserve+0xef/0x2c0 net/core/skbuff.c:609
__alloc_skb+0x164/0x380 net/core/skbuff.c:678
alloc_skb include/linux/skbuff.h:1331 [inline]
nlmsg_new include/net/netlink.h:1018 [inline]
audit_buffer_alloc kernel/audit.c:1795 [inline]
audit_log_start+0x2e1/0x7e0 kernel/audit.c:1913
audit_seccomp+0x61/0x280 kernel/auditsc.c:3003
seccomp_log kernel/seccomp.c:1016 [inline]
__seccomp_filter+0x670/0xf40 kernel/seccomp.c:1337
__secure_computing+0x26c/0x3f0 kernel/seccomp.c:1367
syscall_trace_enter+0x8b/0x260 kernel/entry/common.c:52
syscall_enter_from_user_mode_work include/linux/entry-common.h:169 [inline]
syscall_enter_from_user_mode include/linux/entry-common.h:199 [inline]
do_syscall_64+0x1ee/0x250 arch/x86/entry/common.c:79
page last free pid 14020 tgid 14019 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1127 [inline]
free_frozen_pages+0x6db/0xfb0 mm/page_alloc.c:2660
__put_partials+0x14c/0x170 mm/slub.c:3153
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x4e/0x120 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:329
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4115 [inline]
slab_alloc_node mm/slub.c:4164 [inline]
kmem_cache_alloc_noprof+0x226/0x3d0 mm/slub.c:4171
audit_buffer_alloc kernel/audit.c:1791 [inline]
audit_log_start+0x2bc/0x7e0 kernel/audit.c:1913
audit_seccomp+0x61/0x280 kernel/auditsc.c:3003
seccomp_log kernel/seccomp.c:1016 [inline]
__seccomp_filter+0x670/0xf40 kernel/seccomp.c:1337
__secure_computing+0x26c/0x3f0 kernel/seccomp.c:1367
syscall_trace_enter+0x8b/0x260 kernel/entry/common.c:52
syscall_enter_from_user_mode_work include/linux/entry-common.h:169 [inline]
syscall_enter_from_user_mode include/linux/entry-common.h:199 [inline]
do_syscall_64+0x1ee/0x250 arch/x86/entry/common.c:79
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Memory state around the buggy address:
ffff888065fb6080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888065fb6100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888065fb6180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888065fb6200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888065fb6280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================