------------[ cut here ]------------
workqueue: cannot queue hci_conn_timeout on wq hci0
WARNING: kernel/workqueue.c:2306 at __queue_work+0xd4a/0x10a0 kernel/workqueue.c:2305, CPU#0: syz-executor/9955
Modules linked in:
CPU: 0 UID: 0 PID: 9955 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:__queue_work+0xd66/0x10a0 kernel/workqueue.c:2305
Code: 49 81 c7 70 01 00 00 4c 8d 35 16 50 cd 0e 48 89 f8 48 c1 e8 03 80 3c 18 00 74 05 e8 84 e8 a6 00 49 8b 75 18 4c 89 f7 4c 89 fa <67> 48 0f b9 3a 4c 89 e8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ef e8
RSP: 0018:ffffc90000007bc8 EFLAGS: 00010046
RAX: 1ffff11009b8814b RBX: dffffc0000000000 RCX: ffff8880774edd00
RDX: ffff88807a3aa970 RSI: ffffffff8ac2cad0 RDI: ffffffff905a9c90
RBP: 0000000000000100 R08: ffffffff905771f7 R09: 1ffffffff20aee3e
R10: dffffc0000000000 R11: ffffffff818d53a0 R12: 0000000000000008
R13: ffff88804dc40a40 R14: ffffffff905a9c90 R15: ffff88807a3aa970
FS: 0000000000000000(0000) GS:ffff888124f59000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555587c234e8 CR3: 000000005e54a000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
call_timer_fn+0x192/0x5e0 kernel/time/timer.c:1748
expire_timers kernel/time/timer.c:1794 [inline]
__run_timers kernel/time/timer.c:2374 [inline]
__run_timer_base+0x67e/0x8b0 kernel/time/timer.c:2386
run_timer_base kernel/time/timer.c:2395 [inline]
run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2405
handle_softirqs+0x225/0x840 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0xca/0x220 kernel/softirq.c:735
irq_exit_rcu+0x9/0x30 kernel/softirq.c:752
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1062
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:finish_task_switch+0x417/0xc60 kernel/sched/core.c:5361
Code: 04 00 00 41 c7 84 24 20 0e 00 00 00 00 00 00 0f 1f 44 00 00 49 83 c4 48 4c 89 e7 e8 43 58 3c 0a e8 5e ac 39 00 fb 4c 8b 65 c8 <49> 8d bc 24 f8 16 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 30 84 c0
RSP: 0018:ffffc9000648f260 EFLAGS: 00000202
RAX: 00000000001d73c7 RBX: ffff8880b863bf20 RCX: 0000000080000001
RDX: 0000000000000006 RSI: ffffffff8e229ce2 RDI: ffffffff8c4bd280
RBP: ffffc9000648f2b0 R08: ffffffff905771f7 R09: 1ffffffff20aee3e
R10: dffffc0000000000 R11: fffffbfff20aee3f R12: ffff8880774edd00
R13: ffff8880b863bee8 R14: dffffc0000000000 R15: 1ffff110170c77e4
context_switch kernel/sched/core.c:5513 [inline]
__schedule+0x17e1/0x56c0 kernel/sched/core.c:7234
preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7556
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
irqentry_exit+0x14f/0x8f0 kernel/entry/common.c:167
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:679
RIP: 0010:lock_acquire+0x221/0x350 kernel/locking/lockdep.c:5872
Code: ff ff ff e8 41 7d 2c 0a f7 44 24 08 00 02 00 00 0f 84 3a ff ff ff 65 48 8b 05 2b 48 ca 11 48 3b 44 24 58 75 33 fb 48 83 c4 60 <5b> 41 5c 41 5d 41 5e 41 5f 5d e9 10 7e 2f 0a cc 48 8d 3d 78 d7 b8
RSP: 0018:ffffc9000648f5e8 EFLAGS: 00000286
RAX: 19646c67d4213e00 RBX: 0000000000000000 RCX: 0000000000000046
RDX: ffffffff941c0050 RSI: ffffffff8e4af03a RDI: ffffffff8c4bd280
RBP: ffffffff818d8d75 R08: 0000000000000008 R09: ffffffff969d20d0
R10: 0000000057c80c64 R11: 00000000a4fe7e86 R12: 0000000000000000
R13: ffff88807a3aa940 R14: 0000000000000001 R15: 0000000000000246
touch_wq_lockdep_map+0xcb/0x180 kernel/workqueue.c:4037
__flush_workqueue+0x148/0x1470 kernel/workqueue.c:4079
drain_workqueue+0xce/0x380 kernel/workqueue.c:4243
hci_dev_close_sync+0x60e/0x10a0 net/bluetooth/hci_sync.c:5391
hci_dev_do_close net/bluetooth/hci_core.c:499 [inline]
hci_unregister_dev+0x232/0x5b0 net/bluetooth/hci_core.c:2678
vhci_release+0x16d/0x1c0 drivers/bluetooth/hci_vhci.c:700
__fput+0x418/0xa50 fs/file_table.c:512
task_work_run+0x1d9/0x270 kernel/task_work.c:233
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0x73a/0x2360 kernel/exit.c:1004
do_group_exit+0x22d/0x2f0 kernel/exit.c:1147
get_signal+0x121b/0x12c0 kernel/signal.c:3038
arch_do_signal_or_restart+0xbb/0x860 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:66 [inline]
exit_to_user_mode_loop+0x104/0x730 kernel/entry/common.c:101
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:318 [inline]
do_syscall_64+0x353/0x580 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f16cc55e68e
Code: Unable to access opcode bytes at 0x7f16cc55e664.
RSP: 002b:00007ffe0d7b9498 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: 0000000000000007 RBX: 000055555e197500 RCX: 00007f16cc55e68e
RDX: 0000000000000000 RSI: 00007ffe0d7b9600 RDI: ffffffffffffff9c
RBP: 00007ffe0d7b9600 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe0d7ba6f0
R13: 00007f16cc6332ca R14: 000055555e1974e8 R15: 0000000000000007
----------------
Code disassembly (best guess):
0: 49 81 c7 70 01 00 00 add $0x170,%r15
7: 4c 8d 35 16 50 cd 0e lea 0xecd5016(%rip),%r14 # 0xecd5024
e: 48 89 f8 mov %rdi,%rax
11: 48 c1 e8 03 shr $0x3,%rax
15: 80 3c 18 00 cmpb $0x0,(%rax,%rbx,1)
19: 74 05 je 0x20
1b: e8 84 e8 a6 00 call 0xa6e8a4
20: 49 8b 75 18 mov 0x18(%r13),%rsi
24: 4c 89 f7 mov %r14,%rdi
27: 4c 89 fa mov %r15,%rdx
* 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction
2f: 4c 89 e8 mov %r13,%rax
32: 48 c1 e8 03 shr $0x3,%rax
36: 80 3c 18 00 cmpb $0x0,(%rax,%rbx,1)
3a: 74 08 je 0x44
3c: 4c 89 ef mov %r13,%rdi
3f: e8 .byte 0xe8