------------[ cut here ]------------
WARNING: CPU: 2 PID: 5966 at net/bluetooth/hci_conn.c:567 hci_conn_timeout+0x11a/0x210 net/bluetooth/hci_conn.c:567
Modules linked in:
CPU: 2 UID: 0 PID: 5966 Comm: kworker/u33:5 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
Workqueue: hci3 hci_conn_timeout
RIP: 0010:hci_conn_timeout+0x11a/0x210 net/bluetooth/hci_conn.c:567
Code: 00 e8 6a 2f 61 f7 4c 89 f1 4c 89 e2 48 c7 c6 a0 91 d8 8c 48 c7 c7 18 ff 7e 90 e8 61 f9 7f fa e9 4d ff ff ff e8 47 2f 61 f7 90 <0f> 0b 90 e8 3e 2f 61 f7 48 8d bb f5 f6 ff ff 48 b8 00 00 00 00 00
RSP: 0018:ffffc900046f7c20 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff88804bf40948 RCX: ffffffff8a5aa46f
RDX: ffff888023b48000 RSI: ffffffff8a5aa519 RDI: 0000000000000005
RBP: 00000000ffffffff R08: 0000000000000005 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000002bc1 R12: ffff88804bf40000
R13: 0000000000000000 R14: ffffffff90838f34 R15: ffffc900046f7d00
FS:  0000000000000000(0000) GS:ffff8880979e6000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000f7fd55c0 CR3: 000000004e1df000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3263
 process_scheduled_works kernel/workqueue.c:3346 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3427
 kthread+0x3c2/0x780 kernel/kthread.c:463
 ret_from_fork+0x675/0x7d0 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>