iommufd_mock iommufd_mock0: Adding to iommu group 0
------------[ cut here ]------------
workqueue: cannot queue hci_cmd_work on wq hci0
WARNING: kernel/workqueue.c:2298 at __queue_work+0xd67/0x1010, CPU#1: syz.1.15999/21022
Modules linked in:
CPU: 1 UID: 0 PID: 21022 Comm: syz.1.15999 Tainted: G             L      syzkaller #0 PREEMPT_{RT,(full)} 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:__queue_work+0xd87/0x1010
Code: 01 00 00 4c 8d 35 19 62 00 0e 4c 89 e8 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 ef e8 b3 23 a1 00 49 8b 75 00 4c 89 f7 4c 89 fa <67> 48 0f b9 3a 48 83 c4 58 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc
RSP: 0018:ffffc90020d2f780 EFLAGS: 00010046
RAX: 1ffff11022516186 RBX: 0000000000000008 RCX: 0000000000080000
RDX: ffff88816adc1968 RSI: ffffffff8a1a76a0 RDI: ffffffff8f8da4e0
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed1022516184 R12: dffffc0000000000
R13: ffff8881128b0c30 R14: ffffffff8f8da4e0 R15: ffff88816adc1968
FS:  00007f755ab166c0(0000) GS:ffff8882a9f1f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000acc CR3: 0000000104be8000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 queue_work_on+0x106/0x1d0
 hci_send_cmd+0xb7/0x1a0
 set_link_security+0x5aa/0x770
 hci_mgmt_cmd+0xa14/0xfa0
 hci_sock_sendmsg+0x6dd/0xf40
 sock_sendmsg_nosec+0x112/0x150
 sock_write_iter+0x308/0x410
 vfs_write+0x629/0xba0
 ksys_write+0x156/0x270
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f755c8bcdd9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f755ab16028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f755cb35fa0 RCX: 00007f755c8bcdd9
RDX: 0000000000000007 RSI: 0000200000000000 RDI: 0000000000000006
RBP: 00007f755c952d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f755cb36038 R14: 00007f755cb35fa0 R15: 00007ffd38b0a1d8
 </TASK>
