------------[ cut here ]------------
WARNING: CPU: 1 PID: 5905 at kernel/workqueue.c:1441 __queue_work+0xe2d/0xfb0 kernel/workqueue.c:1441
Modules linked in:
CPU: 1 PID: 5905 Comm: kworker/u4:20 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Workqueue: events_unbound nsim_dev_trap_report_work
RIP: 0010:__queue_work+0xe2d/0xfb0 kernel/workqueue.c:1441
Code: e9 9d fc ff ff 48 8b 0c 24 80 e1 07 80 c1 03 38 c1 0f 8c c7 fc ff ff 48 8b 3c 24 e8 0d d1 7d 00 e9 b9 fc ff ff e8 13 a2 2d 00 <0f> 0b 48 83 c4 60 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 fd a1 2d 00
RSP: 0018:ffffc900001e0ae8 EFLAGS: 00010046
RAX: ffffffff8153344d RBX: 0000000000010000 RCX: ffff88802b3d5940
RDX: 0000000000000100 RSI: 0000000000000100 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: fffffbfff1c3ed56
R10: fffffbfff1c3ed56 R11: 1ffffffff1c3ed55 R12: ffff8880566f2800
R13: ffff8880566f29c0 R14: 0000000000000008 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb30ad88e9c CR3: 0000000026516000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 call_timer_fn+0x1a0/0x670 kernel/time/timer.c:1700
 expire_timers kernel/time/timer.c:1746 [inline]
 __run_timers+0x554/0x7d0 kernel/time/timer.c:2022
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:2035
 handle_softirqs+0x2a1/0x920 kernel/softirq.c:596
 __do_softirq kernel/softirq.c:630 [inline]
 invoke_softirq kernel/softirq.c:470 [inline]
 __irq_exit_rcu+0x12f/0x220 kernel/softirq.c:679
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:691
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
 sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:___slab_alloc+0x106a/0x1230 mm/slub.c:3219
Code: 48 c7 44 24 70 00 00 00 00 9c 8f 44 24 70 f7 44 24 70 00 02 00 00 75 77 f7 c5 00 02 00 00 74 01 fb 65 48 8b 04 25 28 00 00 00 <48> 3b 44 24 78 0f 85 ec 00 00 00 4c 89 f8 48 81 c4 80 00 00 00 5b
RSP: 0018:ffffc900032d79a0 EFLAGS: 00000206
RAX: 8d82bb3eed9d7300 RBX: ffff8880b8f3e840 RCX: 8d82bb3eed9d7300
RDX: dffffc0000000000 RSI: ffffffff8a8c0580 RDI: ffffffff8adef760
RBP: 0000000000000246 R08: dffffc0000000000 R09: fffffbfff215c466
R10: fffffbfff215c466 R11: 1ffffffff215c465 R12: ffff8880b8f3e840
R13: ffff8880b8f3e820 R14: 0000000000000001 R15: ffff888079c30000
 __slab_alloc mm/slub.c:3240 [inline]
 slab_alloc_node mm/slub.c:3325 [inline]
 __kmem_cache_alloc_node+0x1a0/0x260 mm/slub.c:3398
 __do_kmalloc_node mm/slab_common.c:935 [inline]
 __kmalloc_node_track_caller+0x9e/0x230 mm/slab_common.c:956
 kmalloc_reserve net/core/skbuff.c:446 [inline]
 __alloc_skb+0x22a/0x7e0 net/core/skbuff.c:515
 alloc_skb include/linux/skbuff.h:1271 [inline]
 nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:748 [inline]
 nsim_dev_trap_report drivers/net/netdevsim/dev.c:805 [inline]
 nsim_dev_trap_report_work+0x28f/0xaf0 drivers/net/netdevsim/dev.c:851
 process_one_work+0x898/0x1160 kernel/workqueue.c:2292
 worker_thread+0xaa2/0x1250 kernel/workqueue.c:2439
 kthread+0x29d/0x330 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
----------------
Code disassembly (best guess):
   0:	48 c7 44 24 70 00 00 	movq   $0x0,0x70(%rsp)
   7:	00 00
   9:	9c                   	pushf
   a:	8f 44 24 70          	pop    0x70(%rsp)
   e:	f7 44 24 70 00 02 00 	testl  $0x200,0x70(%rsp)
  15:	00
  16:	75 77                	jne    0x8f
  18:	f7 c5 00 02 00 00    	test   $0x200,%ebp
  1e:	74 01                	je     0x21
  20:	fb                   	sti
  21:	65 48 8b 04 25 28 00 	mov    %gs:0x28,%rax
  28:	00 00
* 2a:	48 3b 44 24 78       	cmp    0x78(%rsp),%rax <-- trapping instruction
  2f:	0f 85 ec 00 00 00    	jne    0x121
  35:	4c 89 f8             	mov    %r15,%rax
  38:	48 81 c4 80 00 00 00 	add    $0x80,%rsp
  3f:	5b                   	pop    %rbx