------------[ cut here ]------------
WARNING: CPU: 1 PID: 3 at kernel/workqueue.c:2257 __queue_work+0xc3a/0x1080 kernel/workqueue.c:2256
Modules linked in:
CPU: 1 UID: 0 PID: 3 Comm: pool_workqueue_ Not tainted 6.12.0-syzkaller-00233-g9fb2cfa4635a #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:__queue_work+0xc3a/0x1080 kernel/workqueue.c:2256
Code: 07 83 c0 03 38 d0 7c 09 84 d2 74 05 e8 ef 6c 97 00 8b 5b 2c 31 ff 83 e3 20 89 de e8 b0 e8 35 00 85 db 75 60 e8 67 e6 35 00 90 <0f> 0b 90 e9 f9 f7 ff ff e8 59 e6 35 00 90 0f 0b 90 e9 a8 f7 ff ff
RSP: 0018:ffffc90000598bf0 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000000000100 RCX: ffffffff8156d641
RDX: ffff88801cedc880 RSI: ffffffff8156d699 RDI: 0000000000000005
RBP: ffff88802b064930 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000000 R12: 1ffff920000b3190
R13: 0000000000000001 R14: 0000000000000101 R15: ffff888012e52000
FS:  0000000000000000(0000) GS:ffff88802b500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000ffaefc3c CR3: 000000000db7c000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 call_timer_fn+0x1a0/0x610 kernel/time/timer.c:1794
 expire_timers kernel/time/timer.c:1840 [inline]
 __run_timers+0x56a/0x930 kernel/time/timer.c:2419
 __run_timer_base kernel/time/timer.c:2430 [inline]
 __run_timer_base kernel/time/timer.c:2423 [inline]
 run_timer_base+0x111/0x190 kernel/time/timer.c:2439
 run_timer_softirq+0x1a/0x40 kernel/time/timer.c:2449
 handle_softirqs+0x213/0x8f0 kernel/softirq.c:554
 __do_softirq kernel/softirq.c:588 [inline]
 invoke_softirq kernel/softirq.c:428 [inline]
 __irq_exit_rcu kernel/softirq.c:637 [inline]
 irq_exit_rcu+0xbb/0x120 kernel/softirq.c:649
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0xa4/0xc0 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:preempt_schedule_irq+0x4c/0x90 kernel/sched/core.c:7015
Code: df 55 65 48 8b 2d 04 44 ed 74 53 48 89 eb 48 c1 eb 03 48 01 c3 bf 01 00 00 00 e8 8f 7f 45 f6 e8 aa d1 7d f6 fb bf 01 00 00 00 <e8> 9f a0 ff ff 9c 58 fa f6 c4 02 75 1e bf 01 00 00 00 e8 8d 26 45
RSP: 0018:ffffc90000357d28 EFLAGS: 00000202
RAX: 0000000000014457 RBX: ffffed10039db910 RCX: 1ffffffff2039d49
RDX: 0000000000000000 RSI: ffffffff8b4cca20 RDI: 0000000000000001
RBP: ffff88801cedc880 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff901d2c8f R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 irqentry_exit+0x36/0x90 kernel/entry/common.c:354
 asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:707
RIP: 0010:lockdep_unregister_key+0x1b2/0x2b0 kernel/locking/lockdep.c:6569
Code: 54 fd ff ff 48 89 df e8 ec c3 ff ff 89 c3 e8 05 db ff ff 9c 58 f6 c4 02 0f 85 92 00 00 00 41 f7 c5 00 02 00 00 74 01 fb 84 db <75> 4f 5b 5d 41 5c 41 5d 41 5e 41 5f e9 ad 9e 0a 00 48 c7 c0 78 5f
RSP: 0018:ffffc90000357df0 EFLAGS: 00000246
RAX: 0000000000000046 RBX: 0000000000000000 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: ffffffff8b4ccce0 RDI: ffffffff8bb14d00
RBP: ffff88806aa1a938 R08: ffffffff9333eb44 R09: 000000000001a922
R10: ffffffff9695b8bf R11: ffff88802b529418 R12: 0000000000000000
R13: 0000000000000246 R14: ffffffff96b2f7c0 R15: ffff88806aa1a940
 wq_unregister_lockdep kernel/workqueue.c:4789 [inline]
 pwq_release_workfn+0x5e5/0xa50 kernel/workqueue.c:5085
 kthread_worker_fn+0x305/0xba0 kernel/kthread.c:844
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
----------------
Code disassembly (best guess):
   0:	df 55 65             	fists  0x65(%rbp)
   3:	48 8b 2d 04 44 ed 74 	mov    0x74ed4404(%rip),%rbp        # 0x74ed440e
   a:	53                   	push   %rbx
   b:	48 89 eb             	mov    %rbp,%rbx
   e:	48 c1 eb 03          	shr    $0x3,%rbx
  12:	48 01 c3             	add    %rax,%rbx
  15:	bf 01 00 00 00       	mov    $0x1,%edi
  1a:	e8 8f 7f 45 f6       	call   0xf6457fae
  1f:	e8 aa d1 7d f6       	call   0xf67dd1ce
  24:	fb                   	sti
  25:	bf 01 00 00 00       	mov    $0x1,%edi
* 2a:	e8 9f a0 ff ff       	call   0xffffa0ce <-- trapping instruction
  2f:	9c                   	pushf
  30:	58                   	pop    %rax
  31:	fa                   	cli
  32:	f6 c4 02             	test   $0x2,%ah
  35:	75 1e                	jne    0x55
  37:	bf 01 00 00 00       	mov    $0x1,%edi
  3c:	e8                   	.byte 0xe8
  3d:	8d 26                	lea    (%rsi),%esp
  3f:	45                   	rex.RB