------------[ cut here ]------------
kernel BUG at block/blk-mq.c:1161!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 13 Comm: kworker/u4:1 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Workqueue: loop0 loop_workfn
RIP: 0010:blk_mq_end_request+0x6c/0x70 block/blk-mq.c:1161
Code: e8 f9 54 54 fd 48 89 df 89 ee 5b 5d e9 6d f9 ff ff 89 f9 80 e1 07 80 c1 03 38 c1 7c ce e8 8c 8e bb fd eb c7 e8 d5 54 54 fd 90 <0f> 0b 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f
RSP: 0018:ffffc900001f7588 EFLAGS: 00010293
RAX: ffffffff846bfebb RBX: ffff888000c59480 RCX: ffff88801af08000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff88801af08000 R09: 0000000000000003
R10: 0000000000000009 R11: 0000000000000000 R12: ffff888000c59588
R13: ffff888000c595a8 R14: 0000000000000000 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff88808d301000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007efd156353d0 CR3: 0000000011aa7000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 lo_rw_aio_complete drivers/block/loop.c:337 [inline]
 lo_rw_aio+0xd75/0xfa0 drivers/block/loop.c:411
 do_req_filebacked drivers/block/loop.c:-1 [inline]
 loop_handle_cmd drivers/block/loop.c:1923 [inline]
 loop_process_work+0x835/0xf90 drivers/block/loop.c:1958
 process_one_work kernel/workqueue.c:3263 [inline]
 process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3346
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:blk_mq_end_request+0x6c/0x70 block/blk-mq.c:1161
Code: e8 f9 54 54 fd 48 89 df 89 ee 5b 5d e9 6d f9 ff ff 89 f9 80 e1 07 80 c1 03 38 c1 7c ce e8 8c 8e bb fd eb c7 e8 d5 54 54 fd 90 <0f> 0b 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f
RSP: 0018:ffffc900001f7588 EFLAGS: 00010293
RAX: ffffffff846bfebb RBX: ffff888000c59480 RCX: ffff88801af08000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff88801af08000 R09: 0000000000000003
R10: 0000000000000009 R11: 0000000000000000 R12: ffff888000c59588
R13: ffff888000c595a8 R14: 0000000000000000 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff88808d301000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000558a8633c168 CR3: 0000000011aa7000 CR4: 0000000000352ef0