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workqueue: cannot queue hci_conn_timeout on wq hci2
WARNING: CPU: 0 PID: 6642 at kernel/workqueue.c:2258 __queue_work+0xd38/0xfb0
Modules linked in:
CPU: 0 UID: 0 PID: 6642 Comm: kworker/0:5 Not tainted syzkaller #0 PREEMPT(full) 
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+0xd38/0xfb0
Code: 42 80 3c 20 00 74 08 4c 89 ef e8 03 cd 9b 00 49 8b 75 00 49 81 c7 78 01 00 00 48 c7 c7 20 eb 69 8b 4c 89 fa e8 b9 31 f9 ff 90 <0f> 0b 90 90 e9 1a f5 ff ff e8 aa 17 36 00 90 0f 0b 90 e9 dd fc ff
RSP: 0018:ffffc900036e7790 EFLAGS: 00010046
RAX: ffe2d7f7c6de8200 RBX: 0000000000000020 RCX: ffff888109d80000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002
RBP: 1ffff11022dfd238 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1bba680 R12: dffffc0000000000
R13: ffff88816a900960 R14: ffff88810008c408 R15: ffff888116fe9178
FS:  0000000000000000(0000) GS:ffff88818eb3b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055cd35cba680 CR3: 000000000dd38000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 queue_delayed_work_on+0x18b/0x280
 l2cap_chan_del+0x285/0x5e0
 l2cap_chan_close+0x597/0x980
 l2cap_chan_timeout+0x158/0x390
 process_scheduled_works+0xae1/0x17b0
 worker_thread+0x8a0/0xda0
 kthread+0x711/0x8a0
 ret_from_fork+0x4bc/0x870
 ret_from_fork_asm+0x1a/0x30
 </TASK>
