------------[ cut here ]------------
WARNING: net/bluetooth/hci_conn.c:567 at hci_conn_timeout+0xff/0x290 net/bluetooth/hci_conn.c:567, CPU#0: kworker/u5:0/47
Modules linked in:
CPU: 0 UID: 0 PID: 47 Comm: kworker/u5:0 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
Workqueue: hci0 hci_conn_timeout
RIP: 0010:hci_conn_timeout+0xff/0x290 net/bluetooth/hci_conn.c:567
Code: 48 89 df e8 23 20 09 00 eb 07 e8 4c 8f 7a f7 b0 13 0f b6 f0 48 89 df 5b 41 5c 41 5e 41 5f 5d e9 07 c8 fe ff e8 32 8f 7a f7 90 <0f> 0b 90 eb 8c 44 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 31 ff ff ff
RSP: 0018:ffffc90000a47a10 EFLAGS: 00010293
RAX: ffffffff8a469bce RBX: ffff888000bc8000 RCX: ffff88801f0ea4c0
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000000
RBP: 00000000ffffffff R08: ffff888000bc8013 R09: 1ffff11000179002
R10: dffffc0000000000 R11: ffffed1000179003 R12: dffffc0000000000
R13: ffff88801efe5c18 R14: ffff888000bc8948 R15: ffff888000bc8010
FS:  0000000000000000(0000) GS:ffff88808d6b5000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7a21269120 CR3: 000000001175e000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 process_one_work kernel/workqueue.c:3263 [inline]
 process_scheduled_works+0xad1/0x1770 kernel/workqueue.c:3346
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x599/0xb30 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>