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workqueue: cannot queue hci_rx_work on wq hci0
WARNING: CPU: 0 PID: 8772 at kernel/workqueue.c:2257 __queue_work+0xd03/0x1160 kernel/workqueue.c:2256
Modules linked in:
CPU: 0 UID: 0 PID: 8772 Comm: syz.0.1127 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:__queue_work+0xd03/0x1160 kernel/workqueue.c:2256
Code: 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 4b 04 00 00 48 8b 75 18 4c 89 fa 48 c7 c7 20 27 8c 8b e8 1e 15 f7 ff 90 <0f> 0b 90 90 e9 2f f7 ff ff e8 af e1 38 00 90 0f 0b 90 e9 b4 f5 ff
RSP: 0018:ffffc90005687be8 EFLAGS: 00010082
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc9000d3a1000
RDX: 0000000000080000 RSI: ffffffff817b1ce5 RDI: 0000000000000001
RBP: ffff88802b3ccac8 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000008
R13: ffff888031839800 R14: 0000000000000000 R15: ffff888031839978
FS:  00007f6cfe5566c0(0000) GS:ffff8880d6a05000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6cfe555f98 CR3: 000000002628c000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 queue_work_on+0x1a4/0x1f0 kernel/workqueue.c:2392
 queue_work include/linux/workqueue.h:669 [inline]
 hci_recv_frame+0x503/0x880 net/bluetooth/hci_core.c:2968
 vhci_get_user drivers/bluetooth/hci_vhci.c:520 [inline]
 vhci_write+0x399/0x480 drivers/bluetooth/hci_vhci.c:616
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x7d3/0x11d0 fs/read_write.c:686
 ksys_write+0x12a/0x250 fs/read_write.c:738
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6cfd78e1ff
Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 f9 92 02 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 4c 93 02 00 48
RSP: 002b:00007f6cfe556000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f6cfd9e6180 RCX: 00007f6cfd78e1ff
RDX: 0000000000000007 RSI: 0000200000000000 RDI: 00000000000000ca
RBP: 00007f6cfd813f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000200000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 00007f6cfd9e6218 R14: 00007f6cfd9e6180 R15: 00007ffeb6195be8
 </TASK>