------------[ cut here ]------------
WARNING: CPU: 1 PID: 3 at kernel/workqueue.c:1726 is_chained_work kernel/workqueue.c:1672 [inline]
WARNING: CPU: 1 PID: 3 at kernel/workqueue.c:1726 __queue_work+0xd49/0x1020 kernel/workqueue.c:1725
Modules linked in:
CPU: 1 PID: 3 Comm: pool_workqueue_ Not tainted 6.6.98-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:__queue_work+0xd49/0x1020 kernel/workqueue.c:1725
Code: 4c 89 f7 48 89 de 89 e9 e8 d4 e3 00 00 48 8b 5c 24 10 e9 10 ff ff ff e8 15 39 2f 00 eb 0c e8 0e 39 2f 00 eb 05 e8 07 39 2f 00 <0f> 0b 48 83 c4 78 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 f1 38 2f 00
RSP: 0018:ffffc900001f0b10 EFLAGS: 00010046
RAX: ffffffff81566d5b RBX: 0000000000000100 RCX: ffff88801a273c00
RDX: 0000000000000100 RSI: 0000000000000100 RDI: 0000000000000000
RBP: ffff88805d685dc0 R08: ffffffff8e4a936f R09: 1ffffffff1c9526d
R10: dffffc0000000000 R11: fffffbfff1c9526e R12: 0000000000000008
R13: dffffc0000000000 R14: 0000000000000001 R15: ffff88805d685c00
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fffcfbabb68 CR3: 0000000065341000 CR4: 00000000003506e0
Call Trace:
 <IRQ>
 call_timer_fn+0x16e/0x530 kernel/time/timer.c:1700
 expire_timers kernel/time/timer.c:1746 [inline]
 __run_timers+0x558/0x7d0 kernel/time/timer.c:2022
 run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2035
 handle_softirqs+0x280/0x820 kernel/softirq.c:578
 __do_softirq kernel/softirq.c:612 [inline]
 invoke_softirq kernel/softirq.c:452 [inline]
 __irq_exit_rcu+0xc7/0x190 kernel/softirq.c:661
 irq_exit_rcu+0x9/0x20 kernel/softirq.c:673
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
 sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:lockdep_unregister_key+0x4e6/0x580 kernel/locking/lockdep.c:6490
Code: 64 d5 90 48 c7 c6 80 b3 67 81 e8 35 09 08 00 e8 00 1c 08 00 e9 67 fc ff ff e8 26 e5 06 09 41 f7 c4 00 02 00 00 74 d1 fb 84 db <75> d0 eb e1 0f 0b 31 db eb a1 0f 0b e9 fd fe ff ff e8 04 e4 06 09
RSP: 0018:ffffc90000087ce0 EFLAGS: 00000246
RAX: 6fda64f87de3f500 RBX: 0000000000000000 RCX: 6fda64f87de3f500
RDX: 0000000000000001 RSI: ffffffff8aaac620 RDI: ffffffff8afc7880
RBP: ffffc90000087dc0 R08: ffffffff90d57327 R09: 1ffffffff21aae64
R10: dffffc0000000000 R11: fffffbfff21aae65 R12: 0000000000000203
R13: ffffffff9074efc0 R14: ffff88806b685129 R15: 1ffff92000010fa0
 wq_unregister_lockdep kernel/workqueue.c:3928 [inline]
 pwq_release_workfn+0x233/0x290 kernel/workqueue.c:4160
 kthread_worker_fn+0x4d4/0xa90 kernel/kthread.c:843
 kthread+0x2fa/0x390 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
 </TASK>
----------------
Code disassembly (best guess):
   0:	64 d5                	fs (bad)
   2:	90                   	nop
   3:	48 c7 c6 80 b3 67 81 	mov    $0xffffffff8167b380,%rsi
   a:	e8 35 09 08 00       	call   0x80944
   f:	e8 00 1c 08 00       	call   0x81c14
  14:	e9 67 fc ff ff       	jmp    0xfffffc80
  19:	e8 26 e5 06 09       	call   0x906e544
  1e:	41 f7 c4 00 02 00 00 	test   $0x200,%r12d
  25:	74 d1                	je     0xfffffff8
  27:	fb                   	sti
  28:	84 db                	test   %bl,%bl
* 2a:	75 d0                	jne    0xfffffffc <-- trapping instruction
  2c:	eb e1                	jmp    0xf
  2e:	0f 0b                	ud2
  30:	31 db                	xor    %ebx,%ebx
  32:	eb a1                	jmp    0xffffffd5
  34:	0f 0b                	ud2
  36:	e9 fd fe ff ff       	jmp    0xffffff38
  3b:	e8 04 e4 06 09       	call   0x906e444