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workqueue: cannot queue hci_cmd_timeout on wq hci0
WARNING: kernel/workqueue.c:2306 at __queue_work+0xd4a/0x10a0 kernel/workqueue.c:2305, CPU#0: dhcpcd/5315
Modules linked in:
CPU: 0 UID: 0 PID: 5315 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+0xd66/0x10a0 kernel/workqueue.c:2305
Code: 49 81 c7 70 01 00 00 4c 8d 35 f6 05 cd 0e 48 89 f8 48 c1 e8 03 80 3c 18 00 74 05 e8 44 6d a8 00 49 8b 75 18 4c 89 f7 4c 89 fa <67> 48 0f b9 3a 4c 89 e8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ef e8
RSP: 0018:ffffc90000007bc8 EFLAGS: 00010046
RAX: 1ffff11009f4e94e RBX: dffffc0000000000 RCX: ffff88801259a540
RDX: ffff888044642970 RSI: ffffffff8ac5d280 RDI: ffffffff905ae050
RBP: 0000000000000100 R08: ffffffff9057b437 R09: 1ffffffff20af686
R10: dffffc0000000000 R11: ffffffff818de180 R12: 0000000000000008
R13: ffff88804fa74a58 R14: ffffffff905ae050 R15: ffff888044642970
FS:  00007f40da27e780(0000) GS:ffff88808c53e000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f40da3f7b45 CR3: 000000001d3a1000 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+0x225/0x840 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:1062 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 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:_compound_head include/linux/page-flags.h:247 [inline]
RIP: 0010:page_slab mm/slab.h:159 [inline]
RIP: 0010:virt_to_slab mm/slab.h:193 [inline]
RIP: 0010:kmem_cache_free+0x45/0x650 mm/slub.c:6488
Code: 05 00 62 43 11 48 89 44 24 20 4c 8b 35 e4 a0 24 0c 48 89 f7 e8 ac 95 4e ff 48 c1 e8 06 48 83 e0 c0 49 8d 0c 06 49 8b 44 06 08 <89> c2 83 e2 01 48 ff ca 48 09 c2 48 21 ca 0f b6 42 33 c1 e0 18 45
RSP: 0018:ffffc9000ee37cd0 EFLAGS: 00000206
RAX: ffff888030414280 RBX: ffff888030414280 RCX: ffffea00010fa900
RDX: 0000000000000000 RSI: ffff888043ea4bc0 RDI: ffff888043ea4bc0
RBP: 0000000000000000 R08: ffff888043ea4c7b R09: 1ffff110087d498f
R10: dffffc0000000000 R11: ffffed10087d4990 R12: ffff888043ea4bc0
R13: 0000000000000000 R14: ffffea0000000000 R15: 0000000000000000
 dentry_kill+0x4d3/0x880 fs/dcache.c:845
 finish_dput+0x1a/0x260 fs/dcache.c:1001
 __fput+0x675/0xa50 fs/file_table.c:520
 fput_close_sync+0x11f/0x240 fs/file_table.c:617
 __do_sys_close fs/open.c:1511 [inline]
 __se_sys_close fs/open.c:1496 [inline]
 __x64_sys_close+0x7e/0x110 fs/open.c:1496
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f40da308407
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:00007fff15d847a0 EFLAGS: 00000202 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 00007f40da27e780 RCX: 00007f40da308407
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000000001a
RBP: 00007fff15da4c10 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000
R13: 0000000000000001 R14: 0000000000000000 R15: 000056043c8ccac0
 </TASK>
----------------
Code disassembly (best guess):
   0:	49 81 c7 70 01 00 00 	add    $0x170,%r15
   7:	4c 8d 35 f6 05 cd 0e 	lea    0xecd05f6(%rip),%r14        # 0xecd0604
   e:	48 89 f8             	mov    %rdi,%rax
  11:	48 c1 e8 03          	shr    $0x3,%rax
  15:	80 3c 18 00          	cmpb   $0x0,(%rax,%rbx,1)
  19:	74 05                	je     0x20
  1b:	e8 44 6d a8 00       	call   0xa86d64
  20:	49 8b 75 18          	mov    0x18(%r13),%rsi
  24:	4c 89 f7             	mov    %r14,%rdi
  27:	4c 89 fa             	mov    %r15,%rdx
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	4c 89 e8             	mov    %r13,%rax
  32:	48 c1 e8 03          	shr    $0x3,%rax
  36:	80 3c 18 00          	cmpb   $0x0,(%rax,%rbx,1)
  3a:	74 08                	je     0x44
  3c:	4c 89 ef             	mov    %r13,%rdi
  3f:	e8                   	.byte 0xe8