------------[ cut here ]------------
kernel BUG at fs/f2fs/data.c:355!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 15 Comm: ksoftirqd/0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:f2fs_write_end_io+0x88e/0xcf0 fs/f2fs/data.c:355
Code: c0 84 c1 0f 85 ef 03 00 00 45 8b ad e8 0f 00 00 4c 89 f7 4c 89 ee e8 51 25 94 fd 4d 39 ee 0f 84 bf fb ff ff e8 93 2a 94 fd 90 <0f> 0b e8 8b 2a 94 fd 4c 8b 74 24 08 be fb ff ff ff 4c 89 f7 e8 79
RSP: 0018:ffffc90000147b10 EFLAGS: 00010246
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffffffff8427983f
RDX: ffff88801da9bc80 RSI: ffffffff8427984d RDI: 0000000000000006
RBP: 0000000000000006 R08: 0000000000000006 R09: 000000000000000b
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88804e518000
R13: 0000000000000000 R14: 000000000000000b R15: ffffea0000c35200
FS:  0000000000000000(0000) GS:ffff888124e62000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000868000 CR3: 00000000217d3000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 bio_endio+0x713/0x860 block/bio.c:1673
 blk_update_request+0x93e/0x15f0 block/blk-mq.c:998
 blk_mq_end_request+0x4f/0x90 block/blk-mq.c:1160
 lo_complete_rq+0x1d4/0x290 drivers/block/loop.c:314
 blk_complete_reqs+0xb1/0xf0 block/blk-mq.c:1235
 handle_softirqs+0x219/0x8e0 kernel/softirq.c:622
 run_ksoftirqd kernel/softirq.c:1063 [inline]
 run_ksoftirqd+0x3a/0x60 kernel/softirq.c:1055
 smpboot_thread_fn+0x3f7/0xae0 kernel/smpboot.c:160
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x56d/0x730 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:f2fs_write_end_io+0x88e/0xcf0 fs/f2fs/data.c:355
Code: c0 84 c1 0f 85 ef 03 00 00 45 8b ad e8 0f 00 00 4c 89 f7 4c 89 ee e8 51 25 94 fd 4d 39 ee 0f 84 bf fb ff ff e8 93 2a 94 fd 90 <0f> 0b e8 8b 2a 94 fd 4c 8b 74 24 08 be fb ff ff ff 4c 89 f7 e8 79
RSP: 0018:ffffc90000147b10 EFLAGS: 00010246
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffffffff8427983f
RDX: ffff88801da9bc80 RSI: ffffffff8427984d RDI: 0000000000000006
RBP: 0000000000000006 R08: 0000000000000006 R09: 000000000000000b
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88804e518000
R13: 0000000000000000 R14: 000000000000000b R15: ffffea0000c35200
FS:  0000000000000000(0000) GS:ffff888124e62000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000868000 CR3: 00000000217d3000 CR4: 0000000000350ef0