syz.0.0 (5358) used greatest stack depth: 130[   86.092876][ T5335] Bluetooth: hci0: command tx timeout
Bluetooth: hci0: Opcode 0x0c1a failed: -4
Bluetooth: hci0: Opcode 0x0406 failed: -4
Bluetooth: hci0: Opcode 0x0406 failed: -4
------------[ cut here ]------------
workqueue: cannot queue hci_rx_work on wq hci0
WARNING: CPU: 0 PID: 5358 at kernel/workqueue.c:2256 __queue_work+0xd38/0xfb0 kernel/workqueue.c:2254
Modules linked in:
CPU: 0 UID: 0 PID: 5358 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~bpo12+1 04/01/2014
RIP: 0010:__queue_work+0xd38/0xfb0 kernel/workqueue.c:2254
Code: 42 80 3c 20 00 74 08 4c 89 ef e8 93 a8 9a 00 49 8b 75 00 49 81 c7 78 01 00 00 48 c7 c7 20 e1 a9 8b 4c 89 fa e8 99 39 f9 ff 90 <0f> 0b 90 90 e9 1a f5 ff ff e8 6a ac 35 00 90 0f 0b 90 e9 dd fc ff
RSP: 0018:ffffc9000d457a70 EFLAGS: 00010046
RAX: 2ea671a1edd2df00 RBX: 0000000000000000 RCX: ffff88801a6ea440
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002
RBP: 1ffff11008b4be38 R08: ffff88801fc24253 R09: 1ffff11003f8484a
R10: dffffc0000000000 R11: ffffed1003f8484b R12: dffffc0000000000
R13: ffff8880119c0ad8 R14: ffff88801a6ea440 R15: ffff888045a5f178
FS:  00007fec2f5f56c0(0000) GS:ffff88808d007000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7be2d909c0 CR3: 00000000431f1000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 queue_work_on+0x181/0x270 kernel/workqueue.c:2390
 queue_work include/linux/workqueue.h:669 [inline]
 hci_recv_frame+0x625/0x7c0 net/bluetooth/hci_core.c:2968
 vhci_get_user drivers/bluetooth/hci_vhci.c:520 [inline]
 vhci_write+0x358/0x4a0 drivers/bluetooth/hci_vhci.c:616
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x5c9/0xb30 fs/read_write.c:686
 ksys_write+0x145/0x250 fs/read_write.c:738
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fec3318d6df
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:00007fec2f5f5000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fec333d5fa0 RCX: 00007fec3318d6df
RDX: 0000000000000007 RSI: 00002000000000c0 RDI: 00000000000000ca
RBP: 00007fec33211e41 R08: 0000000000000000 R09: 0000000000000000
R10: 00002000000000c0 R11: 0000000000000293 R12: 0000000000000000
R13: 00007fec333d6038 R14: 00007fec333d5fa0 R15: 00007ffccaad25d8
 </TASK>