------------[ cut here ]------------
kernel BUG at fs/f2fs/data.c:358!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 25 Comm: kworker/u4:2 Not tainted 6.15.0-rc4-syzkaller-gca91b9500108 #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_rootcg_workfn
RIP: 0010:f2fs_write_end_io+0x6cc/0x6d0 fs/f2fs/data.c:357
Code: 5a c7 1e fe e9 d1 fa ff ff 44 89 f1 80 e1 07 38 c1 0f 8c 27 fb ff ff 4c 89 f7 e8 df c6 1e fe e9 1a fb ff ff e8 75 d1 bc fd 90 <0f> 0b 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 41
RSP: 0000:ffffc900004bf560 EFLAGS: 00010093
RAX: ffffffff8402ed5b RBX: ffffc900004bf598 RCX: ffff88801af98000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000000000a
RBP: ffffea000150e4c0 R08: ffffea000150e4ef R09: 1ffffd40002a1c9d
R10: dffffc0000000000 R11: fffff940002a1c9e R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000000000000 R15: 000000000000000a
FS:  0000000000000000(0000) GS:ffff88808d6cc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5c41a31ea0 CR3: 00000000594ae000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 blk_update_request+0x5ee/0xe80 block/blk-mq.c:983
 blk_mq_end_request+0x3e/0x70 block/blk-mq.c:1145
 blk_flush_complete_seq+0x678/0xcc0 block/blk-flush.c:191
 flush_end_io+0xbaf/0xe60 block/blk-flush.c:250
 __blk_mq_end_request+0x4a9/0x5e0 block/blk-mq.c:1135
 loop_handle_cmd drivers/block/loop.c:1883 [inline]
 loop_process_work+0xaf0/0xf30 drivers/block/loop.c:1901
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xadb/0x17a0 kernel/workqueue.c:3319
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400
 kthread+0x70e/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:f2fs_write_end_io+0x6cc/0x6d0 fs/f2fs/data.c:357
Code: 5a c7 1e fe e9 d1 fa ff ff 44 89 f1 80 e1 07 38 c1 0f 8c 27 fb ff ff 4c 89 f7 e8 df c6 1e fe e9 1a fb ff ff e8 75 d1 bc fd 90 <0f> 0b 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 41
RSP: 0000:ffffc900004bf560 EFLAGS: 00010093
RAX: ffffffff8402ed5b RBX: ffffc900004bf598 RCX: ffff88801af98000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000000000a
RBP: ffffea000150e4c0 R08: ffffea000150e4ef R09: 1ffffd40002a1c9d
R10: dffffc0000000000 R11: fffff940002a1c9e R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000000000000 R15: 000000000000000a
FS:  0000000000000000(0000) GS:ffff88808d6cc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5c41a31ea0 CR3: 00000000594ae000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400