------------[ cut here ]------------
WARNING: CPU: 1 PID: 4074 at kernel/workqueue.c:1441 __queue_work+0xddc/0xf90
Modules linked in:
CPU: 1 PID: 4074 Comm: kworker/1:13 Not tainted 6.1.100-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Workqueue: events free_ipc
RIP: 0010:__queue_work+0xddc/0xf90 kernel/workqueue.c:1441
Code: 8b 3c 24 e8 56 a2 88 00 e9 d9 fc ff ff e8 cc 1a 31 00 89 ee 48 c7 c7 c0 96 fd 8c e8 9e 46 0a 03 e9 1e fc ff ff e8 b4 1a 31 00 <0f> 0b 48 83 c4 50 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 9e 1a 31 00
RSP: 0018:ffffc900001e0af8 EFLAGS: 00010046
RAX: ffffffff81597fcc RBX: 00000000000b0012 RCX: ffff888023288000
RDX: 0000000080000100 RSI: 0000000000000100 RDI: 0000000000000000
RBP: 0000000000010000 R08: ffffffff815a6d75 R09: fffffbfff1ce7086
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: dffffc0000000000 R14: 0000000000000008 R15: ffff888075e80000
FS:  0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc378905f58 CR3: 00000000649dd000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 call_timer_fn+0x1ad/0x6b0 kernel/time/timer.c:1504
 expire_timers kernel/time/timer.c:1544 [inline]
 __run_timers+0x6a8/0x890 kernel/time/timer.c:1820
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1833
 handle_softirqs+0x2ee/0xa40 kernel/softirq.c:571
 __do_softirq kernel/softirq.c:605 [inline]
 invoke_softirq kernel/softirq.c:445 [inline]
 __irq_exit_rcu+0x157/0x240 kernel/softirq.c:654
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:666
 sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1106
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:unwind_get_return_address+0x4d/0x80 arch/x86/kernel/unwind_orc.c:323
Code: 3b 00 74 3a 48 83 c3 48 49 89 df 49 c1 ef 03 43 80 3c 37 00 74 08 48 89 df e8 cf 7e a5 00 48 8b 3b e8 17 da 1e 00 85 c0 74 14 <43> 80 3c 37 00 74 08 48 89 df e8 b4 7e a5 00 48 8b 03 eb 02 31 c0
RSP: 0018:ffffc9000a4bf500 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffffc9000a4bf568 RCX: ffffffff8fb12000
RDX: ffffffff8fc6b101 RSI: 0000000000000000 RDI: ffffffff81e1f8b6
RBP: ffffc9000a4bf5b0 R08: dffffc0000000000 R09: ffffc9000a4bf570
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888023288000
R13: ffffffff81785510 R14: dffffc0000000000 R15: 1ffff92001497ead
 arch_stack_walk+0xf3/0x140 arch/x86/kernel/stacktrace.c:26
 stack_trace_save+0x113/0x1c0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
 kasan_save_free_info+0x27/0x40 mm/kasan/generic.c:516
 ____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236
 kasan_slab_free include/linux/kasan.h:177 [inline]
 slab_free_hook mm/slub.c:1724 [inline]
 slab_free_freelist_hook mm/slub.c:1750 [inline]
 slab_free mm/slub.c:3661 [inline]
 __kmem_cache_free+0x25c/0x3c0 mm/slub.c:3674
 list_lru_destroy+0x768/0x840 mm/list_lru.c:598
 deactivate_locked_super+0xb8/0x110 fs/super.c:340
 cleanup_mnt+0x490/0x520 fs/namespace.c:1186
 mntput_no_expire+0x7af/0x850 fs/namespace.c:1272
 free_ipc_ns ipc/namespace.c:136 [inline]
 free_ipc+0x6c/0x1d0 ipc/namespace.c:157
 process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292
 worker_thread+0xa47/0x1200 kernel/workqueue.c:2439
 kthread+0x28d/0x320 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
----------------
Code disassembly (best guess):
   0:	3b 00                	cmp    (%rax),%eax
   2:	74 3a                	je     0x3e
   4:	48 83 c3 48          	add    $0x48,%rbx
   8:	49 89 df             	mov    %rbx,%r15
   b:	49 c1 ef 03          	shr    $0x3,%r15
   f:	43 80 3c 37 00       	cmpb   $0x0,(%r15,%r14,1)
  14:	74 08                	je     0x1e
  16:	48 89 df             	mov    %rbx,%rdi
  19:	e8 cf 7e a5 00       	call   0xa57eed
  1e:	48 8b 3b             	mov    (%rbx),%rdi
  21:	e8 17 da 1e 00       	call   0x1eda3d
  26:	85 c0                	test   %eax,%eax
  28:	74 14                	je     0x3e
* 2a:	43 80 3c 37 00       	cmpb   $0x0,(%r15,%r14,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	48 89 df             	mov    %rbx,%rdi
  34:	e8 b4 7e a5 00       	call   0xa57eed
  39:	48 8b 03             	mov    (%rbx),%rax
  3c:	eb 02                	jmp    0x40
  3e:	31 c0                	xor    %eax,%eax