------------[ cut here ]------------
workqueue: cannot queue hci_cmd_timeout on wq hci4
WARNING: CPU: 0 PID: 5883 at kernel/workqueue.c:2258 __queue_work+0xd62/0xfe0 kernel/workqueue.c:2256
Modules linked in:
CPU: 0 UID: 0 PID: 5883 Comm: udevd Not tainted 6.15.0-rc6-syzkaller-01183-g894fbb55e60c #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:__queue_work+0xd62/0xfe0 kernel/workqueue.c:2256
Code: 42 80 3c 20 00 74 08 4c 89 ef e8 f9 dd 96 00 49 8b 75 00 49 81 c7 78 01 00 00 48 c7 c7 e0 cc 69 8b 4c 89 fa e8 9f 40 f9 ff 90 <0f> 0b 90 90 e9 f1 f4 ff ff e8 00 e4 34 00 90 0f 0b 90 e9 dd fc ff
RSP: 0018:ffffc90000007b08 EFLAGS: 00010046
RAX: df89f1e6292df800 RBX: 0000000000000100 RCX: ffff88805eed9e00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000002
RBP: 1ffff110047ff538 R08: ffff8880b8823e93 R09: 1ffff110171047d2
R10: dffffc0000000000 R11: ffffed10171047d3 R12: dffffc0000000000
R13: ffff88805abf4948 R14: 0000000000000008 R15: ffff888023ffa978
FS:  00007f553e649880(0000) GS:ffff8881260b6000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000004e5000 CR3: 000000007e832000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 call_timer_fn+0x17e/0x5f0 kernel/time/timer.c:1789
 expire_timers kernel/time/timer.c:1835 [inline]
 __run_timers kernel/time/timer.c:2414 [inline]
 __run_timer_base+0x646/0x860 kernel/time/timer.c:2426
 run_timer_base kernel/time/timer.c:2435 [inline]
 run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2445
 handle_softirqs+0x283/0x870 kernel/softirq.c:579
 __do_softirq kernel/softirq.c:613 [inline]
 invoke_softirq kernel/softirq.c:453 [inline]
 __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x29/0x50 kernel/locking/spinlock.c:202
Code: 90 f3 0f 1e fa 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 2a a5 43 f6 48 89 df e8 52 3c 44 f6 e8 5d c4 6c f6 fb bf 01 00 00 00 <e8> 62 46 36 f6 65 8b 05 cb f4 1b 07 85 c0 74 07 5b c3 cc cc cc cc
RSP: 0018:ffffc900043dfa70 EFLAGS: 00000282
RAX: df89f1e6292df800 RBX: ffff88802c42e5c0 RCX: df89f1e6292df800
RDX: 0000000000000000 RSI: ffffffff8d754661 RDI: 0000000000000001
RBP: ffffc900043dfcb0 R08: ffffffff8f7f7577 R09: 1ffffffff1efeeae
R10: dffffc0000000000 R11: fffffbfff1efeeaf R12: ffff88805eed9e00
R13: ffffc900043dfe01 R14: 0000000000000012 R15: ffff88805eeda728
 spin_unlock_irq include/linux/spinlock.h:401 [inline]
 signalfd_dequeue fs/signalfd.c:170 [inline]
 signalfd_read_iter+0x2ff/0x980 fs/signalfd.c:216
 new_sync_read fs/read_write.c:489 [inline]
 vfs_read+0x4cd/0x980 fs/read_write.c:570
 ksys_read+0x145/0x250 fs/read_write.c:713
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f553dea7407
Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007ffd67ea3f00 EFLAGS: 00000202 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007f553e649880 RCX: 00007f553dea7407
RDX: 0000000000000080 RSI: 00007ffd67ea4040 RDI: 0000000000000003
RBP: 000055cc8577c910 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffd67ea3f90
R13: 00007ffd67ea3f90 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
----------------
Code disassembly (best guess):
   0:	90                   	nop
   1:	f3 0f 1e fa          	endbr64
   5:	53                   	push   %rbx
   6:	48 89 fb             	mov    %rdi,%rbx
   9:	48 83 c7 18          	add    $0x18,%rdi
   d:	48 8b 74 24 08       	mov    0x8(%rsp),%rsi
  12:	e8 2a a5 43 f6       	call   0xf643a541
  17:	48 89 df             	mov    %rbx,%rdi
  1a:	e8 52 3c 44 f6       	call   0xf6443c71
  1f:	e8 5d c4 6c f6       	call   0xf66cc481
  24:	fb                   	sti
  25:	bf 01 00 00 00       	mov    $0x1,%edi
* 2a:	e8 62 46 36 f6       	call   0xf6364691 <-- trapping instruction
  2f:	65 8b 05 cb f4 1b 07 	mov    %gs:0x71bf4cb(%rip),%eax        # 0x71bf501
  36:	85 c0                	test   %eax,%eax
  38:	74 07                	je     0x41
  3a:	5b                   	pop    %rbx
  3b:	c3                   	ret
  3c:	cc                   	int3
  3d:	cc                   	int3
  3e:	cc                   	int3
  3f:	cc                   	int3