------------[ cut here ]------------
WARNING: CPU: 3 PID: 5979 at net/bluetooth/hci_conn.c:567 hci_conn_timeout+0x11a/0x210 net/bluetooth/hci_conn.c:567
Modules linked in:
CPU: 3 UID: 0 PID: 5979 Comm: kworker/u33:3 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 7a 02 2d f7 4c 89 f1 4c 89 e2 48 c7 c6 00 7c fd 8c 48 c7 c7 30 3c a7 90 e8 d1 56 88 fa e9 4d ff ff ff e8 57 02 2d f7 90 <0f> 0b 90 e8 4e 02 2d f7 48 8d bb f5 f6 ff ff 48 b8 00 00 00 00 00
RSP: 0018:ffffc9000309fc30 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff88802a354948 RCX: ffffffff8a8eaf3f
RDX: ffff888031048000 RSI: ffffffff8a8eafe9 RDI: 0000000000000005
RBP: 00000000ffffffff R08: 0000000000000005 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000002c10 R12: ffff88802a354000
R13: 0000000000000000 R14: ffffffff90abd954 R15: ffffc9000309fd10
FS:  0000000000000000(0000) GS:ffff8880d69ac000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555592195808 CR3: 00000000623f3000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 process_one_work+0x9cc/0x1b70 kernel/workqueue.c:3236
 process_scheduled_works kernel/workqueue.c:3319 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
 kthread+0x3c2/0x780 kernel/kthread.c:463
 ret_from_fork+0x56a/0x730 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>