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workqueue: cannot queue hci_rx_work on wq hci0
WARNING: kernel/workqueue.c:2353 at __queue_work+0xd83/0x10d0 kernel/workqueue.c:2352, CPU#0: syz.0.0/5329
Modules linked in:
CPU: 0 UID: 0 PID: 5329 Comm: syz.0.0 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+0xd9f/0x10d0 kernel/workqueue.c:2352
Code: 49 81 c7 70 01 00 00 4c 8d 35 ad f3 ee 0e 48 89 f8 48 c1 e8 03 80 3c 18 00 74 05 e8 3b 5a ab 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:ffffc9000dddfaf8 EFLAGS: 00010046
RAX: 1ffff11002519978 RBX: dffffc0000000000 RCX: ffff8880003a8000
RDX: ffff88804395a970 RSI: ffffffff8ad8e820 RDI: ffffffff907d5aa0
RBP: 0000000000000000 R08: ffff8880128ccbaf R09: 1ffff11002519975
R10: dffffc0000000000 R11: ffffed1002519976 R12: 0000000000000008
R13: ffff8880128ccba8 R14: ffffffff907d5aa0 R15: ffff88804395a970
FS:  00007f33daf926c0(0000) GS:ffff88808c2bc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f33d2a07c00 CR3: 00000000439fd000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 queue_work_on+0x106/0x1d0 kernel/workqueue.c:2501
 queue_work include/linux/workqueue.h:700 [inline]
 hci_recv_frame+0x61e/0x7c0 net/bluetooth/hci_core.c:2946
 vhci_get_user drivers/bluetooth/hci_vhci.c:530 [inline]
 vhci_write+0x35d/0x4a0 drivers/bluetooth/hci_vhci.c:626
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x612/0xba0 fs/read_write.c:687
 ksys_write+0x150/0x270 fs/read_write.c:739
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f33deb5e98e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 <c3> 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007f33daf91f78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f33daf926c0 RCX: 00007f33deb5e98e
RDX: 0000000000000007 RSI: 0000200000000400 RDI: 00000000000000ca
RBP: 00007f33dec3506b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f33dee26308 R14: 00007f33dee26270 R15: 00007ffd8d2ee0e8
 </TASK>
----------------
Code disassembly (best guess):
   0:	49 81 c7 70 01 00 00 	add    $0x170,%r15
   7:	4c 8d 35 ad f3 ee 0e 	lea    0xeeef3ad(%rip),%r14        # 0xeeef3bb
   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 3b 5a ab 00       	call   0xab5a5b
  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