------------[ cut here ]------------
WARNING: CPU: 2 PID: 3 at kernel/workqueue.c:2257 __queue_work+0xc3a/0x1080 kernel/workqueue.c:2256
Modules linked in:
CPU: 2 UID: 0 PID: 3 Comm: pool_workqueue_ Not tainted 6.13.0-rc3-syzkaller-00193-ge9b8ffafd20a #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 3f e8 98 00 8b 5b 2c 31 ff 83 e3 20 89 de e8 10 7f 36 00 85 db 75 60 e8 c7 7c 36 00 90 <0f> 0b 90 e9 f9 f7 ff ff e8 b9 7c 36 00 90 0f 0b 90 e9 7e f6 ff ff
RSP: 0018:ffffc90000548be8 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000000000100 RCX: ffffffff8162d1d1
RDX: ffff888040eac880 RSI: ffffffff8162d229 RDI: 0000000000000005
RBP: ffff88806c774930 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000000 R12: 1ffff920000a918f
R13: 0000000000000001 R14: 0000000000000100 R15: ffff888062df5800
FS:  0000000000000000(0000) GS:ffff88802b600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc9d7ea038 CR3: 0000000029976000 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:1793
 expire_timers kernel/time/timer.c:1839 [inline]
 __run_timers+0x56a/0x930 kernel/time/timer.c:2418
 __run_timer_base kernel/time/timer.c:2430 [inline]
 __run_timer_base kernel/time/timer.c:2422 [inline]
 run_timer_base+0x114/0x190 kernel/time/timer.c:2439
 run_timer_softirq+0x1a/0x40 kernel/time/timer.c:2449
 handle_softirqs+0x213/0x8f0 kernel/softirq.c:561
 __do_softirq kernel/softirq.c:595 [inline]
 invoke_softirq kernel/softirq.c:435 [inline]
 __irq_exit_rcu+0x109/0x170 kernel/softirq.c:662
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:678
 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:lockdep_unregister_key+0x1b2/0x2b0 kernel/locking/lockdep.c:6593
Code: 54 fd ff ff 48 89 df e8 cc c3 ff ff 89 c3 e8 05 d9 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 fd 8b 0a 00 48 c7 c0 94 16
RSP: 0018:ffffc90000157df0 EFLAGS: 00000246
RAX: 0000000000000046 RBX: 0000000000000000 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: ffffffff8b4cd440 RDI: ffffffff8bb16ec0
RBP: ffff888061f10138 R08: ffffffff933447a2 R09: 000000000000ef11
R10: ffffffff96978cc7 R11: ffff88802b629458 R12: 0000000000000000
R13: 0000000000000246 R14: ffffffff96b4b9f8 R15: ffff888061f10140
 wq_unregister_lockdep kernel/workqueue.c:4803 [inline]
 pwq_release_workfn+0x5e5/0xa50 kernel/workqueue.c:5099
 kthread_worker_fn+0x305/0xbb0 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), 4 bytes skipped:
   0:	48 89 df             	mov    %rbx,%rdi
   3:	e8 cc c3 ff ff       	call   0xffffc3d4
   8:	89 c3                	mov    %eax,%ebx
   a:	e8 05 d9 ff ff       	call   0xffffd914
   f:	9c                   	pushf
  10:	58                   	pop    %rax
  11:	f6 c4 02             	test   $0x2,%ah
  14:	0f 85 92 00 00 00    	jne    0xac
  1a:	41 f7 c5 00 02 00 00 	test   $0x200,%r13d
  21:	74 01                	je     0x24
  23:	fb                   	sti
  24:	84 db                	test   %bl,%bl
* 26:	75 4f                	jne    0x77 <-- trapping instruction
  28:	5b                   	pop    %rbx
  29:	5d                   	pop    %rbp
  2a:	41 5c                	pop    %r12
  2c:	41 5d                	pop    %r13
  2e:	41 5e                	pop    %r14
  30:	41 5f                	pop    %r15
  32:	e9 fd 8b 0a 00       	jmp    0xa8c34
  37:	48                   	rex.W
  38:	c7                   	.byte 0xc7
  39:	c0                   	.byte 0xc0
  3a:	94                   	xchg   %eax,%esp
  3b:	16                   	(bad)