------------[ cut here ]------------
workqueue: cannot queue hci_cmd_work on wq hci0
WARNING: kernel/workqueue.c:2341 at __queue_work+0xdc3/0x1120 kernel/workqueue.c:2340, CPU#1: syz.1.1070/10067
Modules linked in:
CPU: 1 UID: 0 PID: 10067 Comm: syz.1.1070 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/25/2026
RIP: 0010:__queue_work+0xde0/0x1120 kernel/workqueue.c:2340
Code: 81 c3 68 01 00 00 4c 8d 35 dd f4 45 0e 48 89 f8 48 c1 e8 03 42 80 3c 20 00 74 05 e8 7a 7a a4 00 49 8b 77 18 4c 89 f7 48 89 da <67> 48 0f b9 3a 4c 89 f8 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 ff
RSP: 0018:ffffc9000428f778 EFLAGS: 00010046
RAX: 1ffff1100706e186 RBX: ffff888051c35168 RCX: 0000000000080000
RDX: ffff888051c35168 RSI: ffffffff8a41caa0 RDI: ffffffff8fd374e0
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed100706e184 R12: dffffc0000000000
R13: 0000000000000008 R14: ffffffff8fd374e0 R15: ffff888038370c18
FS:  00007f7fd0d866c0(0000) GS:ffff888125af2000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c3adecc CR3: 0000000040966000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 000000000000a1c5 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 queue_work_on+0x106/0x1d0 kernel/workqueue.c:2489
 queue_work include/linux/workqueue.h:699 [inline]
 hci_send_cmd+0xb7/0x1a0 net/bluetooth/hci_core.c:3076
 set_link_security+0x5b1/0x770 net/bluetooth/mgmt.c:1931
 hci_mgmt_cmd+0xa2c/0xfc0 net/bluetooth/hci_sock.c:1719
 hci_sock_sendmsg+0x6e1/0xf50 net/bluetooth/hci_sock.c:1839
 sock_sendmsg_nosec+0x13a/0x180 net/socket.c:810
 __sock_sendmsg net/socket.c:825 [inline]
 sock_write_iter+0x2e4/0x3f0 net/socket.c:1281
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x61e/0xbb0 fs/read_write.c:687
 ksys_write+0x156/0x270 fs/read_write.c:739
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x17b/0x530 arch/x86/entry/syscall_64.c:85
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7fd2b2de99
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:00007f7fd0d86028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f7fd2db5fa0 RCX: 00007f7fd2b2de99
RDX: 0000000000000007 RSI: 0000200000000000 RDI: 0000000000000005
RBP: 00007f7fd2bc3eaf R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7fd2db6038 R14: 00007f7fd2db5fa0 R15: 00007ffd2e513d98
 </TASK>
----------------
Code disassembly (best guess):
   0:	81 c3 68 01 00 00    	add    $0x168,%ebx
   6:	4c 8d 35 dd f4 45 0e 	lea    0xe45f4dd(%rip),%r14        # 0xe45f4ea
   d:	48 89 f8             	mov    %rdi,%rax
  10:	48 c1 e8 03          	shr    $0x3,%rax
  14:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1)
  19:	74 05                	je     0x20
  1b:	e8 7a 7a a4 00       	call   0xa47a9a
  20:	49 8b 77 18          	mov    0x18(%r15),%rsi
  24:	4c 89 f7             	mov    %r14,%rdi
  27:	48 89 da             	mov    %rbx,%rdx
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	4c 89 f8             	mov    %r15,%rax
  32:	48 c1 e8 03          	shr    $0x3,%rax
  36:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1)
  3b:	74 08                	je     0x45
  3d:	4c 89 ff             	mov    %r15,%rdi