------------[ cut here ]------------
WARNING: CPU: 0 PID: 5432 at kernel/workqueue.c:1745 is_chained_work kernel/workqueue.c:1691 [inline]
WARNING: CPU: 0 PID: 5432 at kernel/workqueue.c:1745 __queue_work+0xd0c/0xfd0 kernel/workqueue.c:1745
Modules linked in:
CPU: 0 PID: 5432 Comm: dhcpcd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/25/2026
RIP: 0010:__queue_work+0xd0c/0xfd0 kernel/workqueue.c:1745
Code: 49 8d 54 24 68 4c 89 e7 4c 89 f6 89 e9 e8 9c e6 00 00 e9 0c ff ff ff e8 12 8f 2f 00 eb 0c e8 0b 8f 2f 00 eb 05 e8 04 8f 2f 00 <0f> 0b 48 83 c4 78 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 ee 8e 2f 00
RSP: 0018:ffffc90000007af0 EFLAGS: 00010046
RAX: ffffffff8157565e RBX: 0000000000000100 RCX: ffff88803110da00
RDX: 0000000000000100 RSI: 0000000000000100 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff8e8c6b2f R09: 1ffffffff1d18d65
R10: dffffc0000000000 R11: fffffbfff1d18d66 R12: 0000000000000008
R13: ffff8880769b8350 R14: ffff8880769b8398 R15: ffff88803135a800
FS:  00007fdb8db88740(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7950d556b8 CR3: 000000003027a000 CR4: 00000000003506f0
Call Trace:
 <IRQ>
 call_timer_fn+0x189/0x540 kernel/time/timer.c:1701
 expire_timers kernel/time/timer.c:1747 [inline]
 __run_timers+0x59c/0x810 kernel/time/timer.c:2023
 run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2036
 handle_softirqs+0x27d/0x820 kernel/softirq.c:578
 __do_softirq kernel/softirq.c:612 [inline]
 invoke_softirq kernel/softirq.c:452 [inline]
 __irq_exit_rcu+0xd3/0x190 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:check_kcov_mode kernel/kcov.c:182 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x17/0x60 kernel/kcov.c:216
Code: 48 8b 3d ec 87 05 0d 48 89 de 5b e9 23 a7 57 00 cc cc cc f3 0f 1e fa 48 8b 04 24 65 48 8b 0d c0 d2 7c 7e 65 8b 15 c1 d2 7c 7e <81> e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 1c 16 00 00
RSP: 0018:ffffc90003787340 EFLAGS: 00000202
RAX: ffffffff813290d2 RBX: ffffc90003787400 RCX: ffff88803110da00
RDX: 0000000080000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc900037873d0 R08: ffff88803110da00 R09: 0000000000000003
R10: 0000000000000004 R11: 0000000000000000 R12: ffffffff81df315e
R13: 00000000ffffffff R14: ffffffff81758be0 R15: ffffc90003787348
 arch_stack_walk+0x152/0x190 arch/x86/kernel/stacktrace.c:24
 stack_trace_save+0xaa/0x100 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:46 [inline]
 kasan_set_track+0x4e/0x70 mm/kasan/common.c:53
 ____kasan_kmalloc mm/kasan/common.c:375 [inline]
 __kasan_kmalloc+0x8f/0xa0 mm/kasan/common.c:384
 kasan_kmalloc include/linux/kasan.h:198 [inline]
 __do_kmalloc_node mm/slab_common.c:1007 [inline]
 __kmalloc_node_track_caller+0xb4/0x230 mm/slab_common.c:1027
 kmalloc_reserve+0x116/0x240 net/core/skbuff.c:584
 __alloc_skb+0x138/0x2c0 net/core/skbuff.c:653
 alloc_skb include/linux/skbuff.h:1316 [inline]
 alloc_skb_with_frags+0xcd/0x7a0 net/core/skbuff.c:6340
 sock_alloc_send_pskb+0x883/0x9a0 net/core/sock.c:2830
 unix_dgram_sendmsg+0x5a9/0x16e0 net/unix/af_unix.c:2003
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg net/socket.c:745 [inline]
 sock_write_iter+0x2dc/0x420 net/socket.c:1161
 call_write_iter include/linux/fs.h:2018 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x474/0x9a0 fs/read_write.c:584
 ksys_write+0x151/0x260 fs/read_write.c:637
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fdb8dc12407
Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007ffd7b5a00d0 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fdb8db88740 RCX: 00007fdb8dc12407
RDX: 000000000000003c RSI: 00007ffd7b5a0130 RDI: 0000000000000005
RBP: 0000562c92d51168 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffd7b5a0560
R13: 0000562caef351c0 R14: 0000562caef304a0 R15: 0000562caef9e970
 </TASK>
----------------
Code disassembly (best guess):
   0:	48 8b 3d ec 87 05 0d 	mov    0xd0587ec(%rip),%rdi        # 0xd0587f3
   7:	48 89 de             	mov    %rbx,%rsi
   a:	5b                   	pop    %rbx
   b:	e9 23 a7 57 00       	jmp    0x57a733
  10:	cc                   	int3
  11:	cc                   	int3
  12:	cc                   	int3
  13:	f3 0f 1e fa          	endbr64
  17:	48 8b 04 24          	mov    (%rsp),%rax
  1b:	65 48 8b 0d c0 d2 7c 	mov    %gs:0x7e7cd2c0(%rip),%rcx        # 0x7e7cd2e3
  22:	7e
  23:	65 8b 15 c1 d2 7c 7e 	mov    %gs:0x7e7cd2c1(%rip),%edx        # 0x7e7cd2eb
* 2a:	81 e2 00 01 ff 00    	and    $0xff0100,%edx <-- trapping instruction
  30:	74 11                	je     0x43
  32:	81 fa 00 01 00 00    	cmp    $0x100,%edx
  38:	75 35                	jne    0x6f
  3a:	83                   	.byte 0x83
  3b:	b9 1c 16 00 00       	mov    $0x161c,%ecx