------------[ cut here ]------------
WARNING: CPU: 0 PID: 5970 at net/bluetooth/hci_conn.c:569 hci_conn_timeout+0x11a/0x210 net/bluetooth/hci_conn.c:569
Modules linked in:
CPU: 0 UID: 0 PID: 5970 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: hci1 hci_conn_timeout
RIP: 0010:hci_conn_timeout+0x11a/0x210 net/bluetooth/hci_conn.c:569
Code: 00 e8 2a bf 2e f7 4c 89 f1 4c 89 e2 48 c7 c6 a0 3d fd 8c 48 c7 c7 e0 e0 a6 90 e8 81 d8 88 fa e9 4d ff ff ff e8 07 bf 2e f7 90 <0f> 0b 90 e8 fe be 2e f7 48 8d bb f5 f6 ff ff 48 b8 00 00 00 00 00
RSP: 0018:ffffc9000339fc30 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff888035938948 RCX: ffffffff8a8ccc4f
RDX: ffff88802325a440 RSI: ffffffff8a8cccf9 RDI: 0000000000000005
RBP: 00000000ffffffff R08: 0000000000000005 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000002c10 R12: ffff888035938000
R13: 0000000000000000 R14: ffffffff90ab7e54 R15: ffffc9000339fd10
FS:  0000000000000000(0000) GS:ffff8880d66b9000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000008000 CR3: 000000000e380000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3236
 process_scheduled_works kernel/workqueue.c:3319 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>