------------[ cut here ]------------
workqueue: cannot queue hci_cmd_timeout on wq hci2
WARNING: kernel/workqueue.c:2305 at __queue_work+0xd2d/0x12b0 kernel/workqueue.c:2304, CPU#0: dhcpcd-run-hook/6662
Modules linked in:
CPU: 0 UID: 0 PID: 6662 Comm: dhcpcd-run-hook 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+0xd31/0x12b0 kernel/workqueue.c:2304
Code: 00 00 00 fc ff df 49 8d 94 24 70 01 00 00 48 89 f9 48 c1 e9 03 80 3c 01 00 0f 85 52 05 00 00 48 8d 3d d3 f7 55 0f 48 8b 75 18 <67> 48 0f b9 3a 48 b8 00 00 00 00 00 fc ff df 48 89 ea 48 c1 ea 03
RSP: 0018:ffffc90000007be0 EFLAGS: 00010046
RAX: dffffc0000000000 RBX: 0000000000000100 RCX: 1ffff1100457014e
RDX: ffff88801c76d970 RSI: ffffffff8aae9210 RDI: ffffffff9125bee0
RBP: ffff888022b80a58 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000000 R12: ffff88801c76d800
R13: 0000000000000000 R14: ffffffff81cfcca0 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff8880d5dda000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd0d46b7000 CR3: 000000003dc7c000 CR4: 0000000000352ef0
Call Trace:
 <IRQ>
 call_timer_fn+0x19a/0x610 kernel/time/timer.c:1748
 expire_timers kernel/time/timer.c:1794 [inline]
 __run_timers+0x570/0xb00 kernel/time/timer.c:2374
 __run_timer_base kernel/time/timer.c:2386 [inline]
 __run_timer_base kernel/time/timer.c:2378 [inline]
 run_timer_base+0x114/0x190 kernel/time/timer.c:2395
 run_timer_softirq+0x1a/0x50 kernel/time/timer.c:2405
 handle_softirqs+0x1ea/0x9b0 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0x162/0x210 kernel/softirq.c:735
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:752
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
 sysvec_apic_timer_interrupt+0xa3/0xc0 arch/x86/kernel/apic/apic.c:1062
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:preempt_count_add+0x4a/0x150 kernel/sched/core.c:5985
Code: c1 e9 03 83 c0 03 65 01 3d 33 a9 8e 12 0f b6 14 11 38 d0 7c 08 84 d2 0f 85 de 00 00 00 8b 15 ed 1e 9e 19 65 8b 05 16 a9 8e 12 <85> d2 75 0b 0f b6 d0 81 fa f4 00 00 00 7f 64 25 ff ff ff 7f 39 c3
RSP: 0018:ffffc900057ff228 EFLAGS: 00000297
RAX: 0000000080000001 RBX: 0000000000000001 RCX: 1ffffffff36e7ac0
RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
RBP: ffff88803db155b8 R08: 0000000000000000 R09: ffffed1007b62ab7
R10: ffff88803db155bf R11: 0000000000000000 R12: ffffffff9122b4a0
R13: 1ffff92000affe4a R14: ffff88803db15610 R15: 00007fd0d49b0000
 __up_read+0x232/0x980 kernel/locking/rwsem.c:1386
 anon_vma_unlock_read mm/internal.h:245 [inline]
 validate_mm+0x261/0x4e0 mm/vma.c:683
 vms_complete_munmap_vmas+0x83b/0xdd0 mm/vma.c:1364
 __mmap_complete mm/vma.c:2617 [inline]
 __mmap_region+0xb42/0x2db0 mm/vma.c:2783
 mmap_region+0x35d/0x620 mm/vma.c:2860
 do_mmap+0xc63/0x12f0 mm/mmap.c:560
 vm_mmap_pgoff+0x29e/0x470 mm/util.c:581
 ksys_mmap_pgoff+0x3cb/0x610 mm/mmap.c:606
 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:89 [inline]
 __se_sys_mmap arch/x86/kernel/sys_x86_64.c:82 [inline]
 __x64_sys_mmap+0x125/0x190 arch/x86/kernel/sys_x86_64.c:82
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd0d49e0242
Code: 08 00 04 00 00 eb e2 90 41 f7 c1 ff 0f 00 00 75 27 55 89 cd 53 48 89 fb 48 85 ff 74 33 41 89 ea 48 89 df b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 5e 5b 5d c3 0f 1f 00 c7 05 46 40 01 00 16 00
RSP: 002b:00007ffc10b8c598 EFLAGS: 00000206 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007fd0d46af000 RCX: 00007fd0d49e0242
RDX: 0000000000000005 RSI: 0000000000003000 RDI: 00007fd0d46af000
RBP: 0000000000000812 R08: 0000000000000003 R09: 0000000000002000
R10: 0000000000000812 R11: 0000000000000206 R12: 00007ffc10b8c5e8
R13: 00007fd0d46b70c0 R14: 00007ffc10b8c9d0 R15: 00000fff821718b6
 </TASK>
----------------
Code disassembly (best guess):
   0:	00 00                	add    %al,(%rax)
   2:	00 fc                	add    %bh,%ah
   4:	ff                   	lcall  (bad)
   5:	df 49 8d             	fisttps -0x73(%rcx)
   8:	94                   	xchg   %eax,%esp
   9:	24 70                	and    $0x70,%al
   b:	01 00                	add    %eax,(%rax)
   d:	00 48 89             	add    %cl,-0x77(%rax)
  10:	f9                   	stc
  11:	48 c1 e9 03          	shr    $0x3,%rcx
  15:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  19:	0f 85 52 05 00 00    	jne    0x571
  1f:	48 8d 3d d3 f7 55 0f 	lea    0xf55f7d3(%rip),%rdi        # 0xf55f7f9
  26:	48 8b 75 18          	mov    0x18(%rbp),%rsi
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  36:	fc ff df
  39:	48 89 ea             	mov    %rbp,%rdx
  3c:	48 c1 ea 03          	shr    $0x3,%rdx