------------[ cut here ]------------
workqueue: cannot queue hci_cmd_timeout on wq hci0
WARNING: kernel/workqueue.c:2298 at __queue_work+0xd3f/0x1040 kernel/workqueue.c:2296, CPU#0: dhcpcd/4998
Modules linked in:
CPU: 0 UID: 0 PID: 4998 Comm: dhcpcd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:__queue_work+0xd67/0x1040 kernel/workqueue.c:2296
Code: a6 0e 49 8d 7d 18 48 89 f8 48 c1 e8 03 42 80 3c 20 00 74 05 e8 4a 66 a5 00 49 8b 75 18 49 81 c7 70 01 00 00 4c 89 f7 4c 89 fa <67> 48 0f b9 3a 4c 89 e8 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 ef
RSP: 0018:ffffc90000007bd8 EFLAGS: 00010082
RAX: 1ffff1100819714e RBX: 0000000000000008 RCX: ffff8880366e2500
RDX: ffff88804157a970 RSI: ffffffff8a9e8e90 RDI: ffffffff9033fe70
RBP: 0000000000000100 R08: ffffffff9030fff7 R09: 1ffffffff2061ffe
R10: dffffc0000000000 R11: ffffffff818d38b0 R12: dffffc0000000000
R13: ffff888040cb8a58 R14: ffffffff9033fe70 R15: ffff88804157a970
FS:  00007fdda1dfb780(0000) GS:ffff88808c87b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055d77b1aaa20 CR3: 0000000035b3b000 CR4: 0000000000352ef0
Call Trace:
 <IRQ>
 call_timer_fn+0x192/0x5e0 kernel/time/timer.c:1748
 expire_timers kernel/time/timer.c:1794 [inline]
 __run_timers kernel/time/timer.c:2374 [inline]
 __run_timer_base+0x67e/0x8b0 kernel/time/timer.c:2386
 run_timer_base kernel/time/timer.c:2395 [inline]
 run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2405
 handle_softirqs+0x22a/0x840 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0xca/0x220 kernel/softirq.c:735
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:752
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1061 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1061
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:179 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x47/0x80 kernel/locking/spinlock.c:198
Code: f7 e8 ed 3a f4 f5 f7 c3 00 02 00 00 74 05 e8 c0 e2 1f f6 9c 58 a9 00 02 00 00 75 27 f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> a4 b9 e5 f5 65 8b 05 cd 3f 8c 07 85 c0 74 18 5b 41 5e c3 cc cc
RSP: 0018:ffffc90007247880 EFLAGS: 00000206
RAX: 0000000000000002 RBX: 0000000000000202 RCX: 0000000080000001
RDX: 0000000000000006 RSI: ffffffff8dfad48f RDI: 0000000000000001
RBP: ffff88801fb21400 R08: ffffffff9030fff7 R09: 1ffffffff2061ffe
R10: dffffc0000000000 R11: fffffbfff2061fff R12: 000000000004d180
R13: dffffc0000000000 R14: ffffffff8ea61520 R15: 0000000000002850
 spin_unlock_irqrestore include/linux/spinlock.h:408 [inline]
 pcpu_alloc_noprof+0xb7e/0x19c0 mm/percpu.c:1864
 mm_alloc_cid_noprof include/linux/mm_types.h:1598 [inline]
 mm_init+0x87b/0xc50 kernel/fork.c:1128
 dup_mm kernel/fork.c:1530 [inline]
 copy_mm+0x122/0x4a0 kernel/fork.c:1586
 copy_process+0x1f1c/0x4440 kernel/fork.c:2264
 kernel_clone+0x284/0x8f0 kernel/fork.c:2721
 __do_sys_clone kernel/fork.c:2862 [inline]
 __se_sys_clone kernel/fork.c:2846 [inline]
 __x64_sys_clone+0x1b6/0x230 kernel/fork.c:2846
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15f/0x560 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdda1ecf636
Code: 89 df e8 6d e8 f6 ff 45 31 c0 31 d2 31 f6 64 48 8b 04 25 10 00 00 00 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 52 89 c5 85 c0 75 31 64 48 8b 04 25 10 00 00
RSP: 002b:00007fffc2f02630 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007fffc2f02638 RCX: 00007fdda1ecf636
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007fffc2f22b80 R08: 0000000000000000 R09: 0000000000000001
R10: 00007fdda1dfba50 R11: 0000000000000246 R12: 00007fffc2f02770
R13: 0000000000000000 R14: 0000000000000000 R15: 000055d76d1baac0
 </TASK>
----------------
Code disassembly (best guess), 2 bytes skipped:
   0:	49 8d 7d 18          	lea    0x18(%r13),%rdi
   4:	48 89 f8             	mov    %rdi,%rax
   7:	48 c1 e8 03          	shr    $0x3,%rax
   b:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1)
  10:	74 05                	je     0x17
  12:	e8 4a 66 a5 00       	call   0xa56661
  17:	49 8b 75 18          	mov    0x18(%r13),%rsi
  1b:	49 81 c7 70 01 00 00 	add    $0x170,%r15
  22:	4c 89 f7             	mov    %r14,%rdi
  25:	4c 89 fa             	mov    %r15,%rdx
* 28:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2d:	4c 89 e8             	mov    %r13,%rax
  30:	48 c1 e8 03          	shr    $0x3,%rax
  34:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1)
  39:	74 08                	je     0x43
  3b:	4c 89 ef             	mov    %r13,%rdi