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workqueue: cannot queue hci_rx_work on wq hci0
WARNING: kernel/workqueue.c:2298 at __queue_work+0xd67/0x1010 kernel/workqueue.c:2296, CPU#0: syz.2.29/5871
Modules linked in:
CPU: 0 UID: 0 PID: 5871 Comm: syz.2.29 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+0xd87/0x1010 kernel/workqueue.c:2296
Code: 01 00 00 4c 8d 35 e9 f4 21 0e 4c 89 e8 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 ef e8 f3 10 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:ffffc9000542fb20 EFLAGS: 00010046
RAX: 1ffff1100b41997d RBX: 0000000000000008 RCX: 0000000000080000
RDX: ffff888036552168 RSI: ffffffff8a260460 RDI: ffffffff8faf76e0
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed100b41997b R12: dffffc0000000000
R13: ffff88805a0ccbe8 R14: ffffffff8faf76e0 R15: ffff888036552168
FS:  00007fbe0872d6c0(0000) GS:ffff888125ccd000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbe0872bfe0 CR3: 000000005cc64000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 queue_work_on+0x106/0x1d0 kernel/workqueue.c:2432
 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: 0033:0x7fbe0a4bd60e
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:00007fbe0872cfb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fbe0872d6c0 RCX: 00007fbe0a4bd60e
RDX: 000000000000000e RSI: 0000200000000240 RDI: 00000000000000ca
RBP: 00007fbe0a592d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbe0a776128 R14: 00007fbe0a776090 R15: 00007fff5b37d468
 </TASK>
----------------
Code disassembly (best guess):
   0:	01 00                	add    %eax,(%rax)
   2:	00 4c 8d 35          	add    %cl,0x35(%rbp,%rcx,4)
   6:	e9 f4 21 0e 4c       	jmp    0x4c0e21ff
   b:	89 e8                	mov    %ebp,%eax
   d:	48 c1 e8 03          	shr    $0x3,%rax
  11:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1)
  16:	74 08                	je     0x20
  18:	4c 89 ef             	mov    %r13,%rdi
  1b:	e8 f3 10 a1 00       	call   0xa11113
  20:	49 8b 75 00          	mov    0x0(%r13),%rsi
  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:	48 83 c4 58          	add    $0x58,%rsp
  33:	5b                   	pop    %rbx
  34:	41 5c                	pop    %r12
  36:	41 5d                	pop    %r13
  38:	41 5e                	pop    %r14
  3a:	41 5f                	pop    %r15
  3c:	5d                   	pop    %rbp
  3d:	c3                   	ret
  3e:	cc                   	int3
  3f:	cc                   	int3