vhci_hcd: Failed attach request for unsupported USB speed: UNKNOWN
------------[ cut here ]------------
workqueue: cannot queue hci_rx_work on wq hci0
WARNING: kernel/workqueue.c:2298 at __queue_work+0xd7c/0x1090 kernel/workqueue.c:2296, CPU#1: syz.2.1197/9566
Modules linked in:
CPU: 1 UID: 0 PID: 9566 Comm: syz.2.1197 Tainted: G             L      syzkaller #0 PREEMPT_{RT,(full)} 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:__queue_work+0xda4/0x1090 kernel/workqueue.c:2296
Code: fe 0d 49 8d 7d 18 48 89 f8 48 c1 e8 03 42 80 3c 20 00 74 05 e8 dd 63 9e 00 49 8b 75 18 49 81 c7 68 01 00 00 4c 89 f7 4c 89 fa <67> 48 0f b9 3a 4c 89 e8 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 ef
RSP: 0018:ffffc90006477b08 EFLAGS: 00010082
RAX: 1ffff110084af97d RBX: 0000000000000008 RCX: 0000000000080000
RDX: ffff8880404c9968 RSI: ffffffff8a104ea0 RDI: ffffffff8f8bcf90
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed10084af97b R12: dffffc0000000000
R13: ffff88804257cbd0 R14: ffffffff8f8bcf90 R15: ffff8880404c9968
FS:  00007f6b407756c0(0000) GS:ffff888126273000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000038f84000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 queue_work_on+0x106/0x1d0 kernel/workqueue.c:2444
 queue_work include/linux/workqueue.h:698 [inline]
 hci_recv_frame+0x625/0x7c0 net/bluetooth/hci_core.c:2969
 vhci_get_user drivers/bluetooth/hci_vhci.c:520 [inline]
 vhci_write+0x35a/0x4a0 drivers/bluetooth/hci_vhci.c:616
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x629/0xba0 fs/read_write.c:688
 ksys_write+0x156/0x270 fs/read_write.c:740
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6b424fd68e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 <c3> 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007f6b40774fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f6b407756c0 RCX: 00007f6b424fd68e
RDX: 0000000000000007 RSI: 0000200000000400 RDI: 00000000000000ca
RBP: 00007f6b425d2d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6b427b6128 R14: 00007f6b427b6090 R15: 00007ffe10931a68
 </TASK>
----------------
Code disassembly (best guess):
   0:	fe 0d 49 8d 7d 18    	decb   0x187d8d49(%rip)        # 0x187d8d4f
   6:	48 89 f8             	mov    %rdi,%rax
   9:	48 c1 e8 03          	shr    $0x3,%rax
   d:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1)
  12:	74 05                	je     0x19
  14:	e8 dd 63 9e 00       	call   0x9e63f6
  19:	49 8b 75 18          	mov    0x18(%r13),%rsi
  1d:	49 81 c7 68 01 00 00 	add    $0x168,%r15
  24:	4c 89 f7             	mov    %r14,%rdi
  27:	4c 89 fa             	mov    %r15,%rdx
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	4c 89 e8             	mov    %r13,%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 ef             	mov    %r13,%rdi