general protection fault: 0000 [#1] SMP
CPU: 1 PID: 1517 Comm: kworker/1:1H Not tainted 5.1.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Workqueue: kblockd blk_mq_run_work_fn
RIP: 0010:mutex_can_spin_on_owner kernel/locking/mutex.c:578 [inline]
RIP: 0010:mutex_optimistic_spin kernel/locking/mutex.c:622 [inline]
RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:928 [inline]
RIP: 0010:__mutex_lock+0x422/0x6d0 kernel/locking/mutex.c:1072
Code: 68 e8 d8 0c 82 45 31 c9 45 31 c0 31 d2 31 f6 b9 02 00 00 00 48 c7 c7 20 2b e7 82 e8 d8 c0 09 ff 49 8b 06 5b 48 83 e0 f8 74 2d <44> 8b 58 38 45 85 db 0f 84 56 01 00 00 48 83 3d 49 a4 d7 00 00 8b
RSP: 0018:ffffc9000303fb80 EFLAGS: 00010206
RAX: 6c61757472697628 RBX: ffffffff820cd8e8 RCX: 0000000000000002
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff82e72b20
RBP: ffffc9000303fc30 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000623 R12: ffff8882326696c0
R13: 0000000000000002 R14: ffff88822fa97d08 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff888237b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055f45dd9de80 CR3: 000000022ef5c000 CR4: 0000000000340ee0
Call Trace:
 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087
 nbd_handle_cmd drivers/block/nbd.c:836 [inline]
 nbd_queue_rq+0xe0/0x410 drivers/block/nbd.c:912
 blk_mq_dispatch_rq_list+0x37d/0x510 block/blk-mq.c:1246
 blk_mq_do_dispatch_sched+0x81/0x110 block/blk-mq-sched.c:114
 blk_mq_sched_dispatch_requests+0x119/0x170 block/blk-mq-sched.c:210
 __blk_mq_run_hw_queue+0x59/0xc0 block/blk-mq.c:1376
 blk_mq_run_work_fn+0x16/0x20 block/blk-mq.c:1609
 process_one_work+0x241/0x480 kernel/workqueue.c:2269
 worker_thread+0x2f/0x320 kernel/workqueue.c:2415
 kthread+0x119/0x130 kernel/kthread.c:253
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352
Modules linked in:
---[ end trace 8c5af824cc9083f0 ]---
RIP: 0010:mutex_can_spin_on_owner kernel/locking/mutex.c:578 [inline]
RIP: 0010:mutex_optimistic_spin kernel/locking/mutex.c:622 [inline]
RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:928 [inline]
RIP: 0010:__mutex_lock+0x422/0x6d0 kernel/locking/mutex.c:1072
Code: 68 e8 d8 0c 82 45 31 c9 45 31 c0 31 d2 31 f6 b9 02 00 00 00 48 c7 c7 20 2b e7 82 e8 d8 c0 09 ff 49 8b 06 5b 48 83 e0 f8 74 2d <44> 8b 58 38 45 85 db 0f 84 56 01 00 00 48 83 3d 49 a4 d7 00 00 8b
RSP: 0018:ffffc9000303fb80 EFLAGS: 00010206
RAX: 6c61757472697628 RBX: ffffffff820cd8e8 RCX: 0000000000000002
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff82e72b20
RBP: ffffc9000303fc30 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000623 R12: ffff8882326696c0
R13: 0000000000000002 R14: ffff88822fa97d08 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff888237b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055f45dd9de80 CR3: 000000022ef5c000 CR4: 0000000000340ee0
----------------
Code disassembly (best guess):
   0:	68 e8 d8 0c 82       	push   $0xffffffff820cd8e8
   5:	45 31 c9             	xor    %r9d,%r9d
   8:	45 31 c0             	xor    %r8d,%r8d
   b:	31 d2                	xor    %edx,%edx
   d:	31 f6                	xor    %esi,%esi
   f:	b9 02 00 00 00       	mov    $0x2,%ecx
  14:	48 c7 c7 20 2b e7 82 	mov    $0xffffffff82e72b20,%rdi
  1b:	e8 d8 c0 09 ff       	call   0xff09c0f8
  20:	49 8b 06             	mov    (%r14),%rax
  23:	5b                   	pop    %rbx
  24:	48 83 e0 f8          	and    $0xfffffffffffffff8,%rax
  28:	74 2d                	je     0x57
* 2a:	44 8b 58 38          	mov    0x38(%rax),%r11d <-- trapping instruction
  2e:	45 85 db             	test   %r11d,%r11d
  31:	0f 84 56 01 00 00    	je     0x18d
  37:	48 83 3d 49 a4 d7 00 	cmpq   $0x0,0xd7a449(%rip)        # 0xd7a488
  3e:	00
  3f:	8b                   	.byte 0x8b