------------[ cut here ]------------
workqueue: cannot queue hci_conn_timeout on wq hci1
WARNING: kernel/workqueue.c:2306 at __queue_work+0xd4a/0x10a0, CPU#1: kworker/1:0/24
Modules linked in:
CPU: 1 UID: 0 PID: 24 Comm: kworker/1:0 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Workqueue: events l2cap_chan_timeout
RIP: 0010:__queue_work+0xd66/0x10a0
Code: 49 81 c7 70 01 00 00 4c 8d 35 f6 98 cc 0e 48 89 f8 48 c1 e8 03 80 3c 18 00 74 05 e8 24 c3 a6 00 49 8b 75 18 4c 89 f7 4c 89 fa <67> 48 0f b9 3a 4c 89 e8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ef e8
RSP: 0018:ffffc900001e78b0 EFLAGS: 00010046
RAX: 1ffff11020a7814b RBX: dffffc0000000000 RCX: ffff8881604d8000
RDX: ffff888169f0a170 RSI: ffffffff8ac44620 RDI: ffffffff905a7350
RBP: 0000000000000020 R08: ffff8881053c0a47 R09: 1ffff11020a78148
R10: dffffc0000000000 R11: ffffed1020a78149 R12: 0000000000000008
R13: ffff8881053c0a40 R14: ffffffff905a7350 R15: ffff888169f0a170
FS:  0000000000000000(0000) GS:ffff8882a8f55000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd02ed89480 CR3: 000000016d4e2000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 queue_delayed_work_on+0x11a/0x1e0
 l2cap_chan_del+0x286/0x600
 l2cap_chan_close+0x4d7/0x770
 l2cap_chan_timeout+0x21e/0x470
 process_scheduled_works+0xa8e/0x14e0
 worker_thread+0xa47/0xfb0
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
