------------[ cut here ]------------ kernel BUG at fs/f2fs/data.c:356! Oops: invalid opcode: 0000 [#1] SMP KASAN PTI CPU: 0 UID: 0 PID: 15 Comm: ksoftirqd/0 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026 RIP: 0010:f2fs_write_end_io+0xf91/0xfd0 fs/f2fs/data.c:355 Code: c6 c0 e9 79 8b e8 df 48 08 fd 90 0f 0b e8 97 c7 a3 fd 4c 89 ef 48 c7 c6 c0 e9 79 8b e8 c8 48 08 fd 90 0f 0b e8 80 c7 a3 fd 90 <0f> 0b e8 78 c7 a3 fd 4c 89 ef 48 c7 c6 c0 e9 79 8b e8 a9 48 08 fd RSP: 0018:ffffc90000147ac8 EFLAGS: 00010246 RAX: ffffffff841f6fc0 RBX: 000000000000000b RCX: ffff88801c6f3c80 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000100 RBP: ffff888000000000 R08: 0000000000000000 R09: 0000000000000100 R10: dffffc0000000000 R11: fffff940001a5441 R12: 0000000034a88000 R13: ffffea0000d2a200 R14: 0000000000000000 R15: 0000000000000006 FS: 0000000000000000(0000) GS:ffff8881265c9000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000020000000ac44 CR3: 000000002b95c000 CR4: 00000000003526f0 Call Trace: blk_update_request+0x57e/0xe60 block/blk-mq.c:1007 blk_mq_end_request+0x3e/0x70 block/blk-mq.c:1169 blk_complete_reqs block/blk-mq.c:1244 [inline] blk_done_softirq+0x10a/0x160 block/blk-mq.c:1249 handle_softirqs+0x1de/0x640 kernel/softirq.c:622 run_ksoftirqd+0x52/0x180 kernel/softirq.c:1063 smpboot_thread_fn+0x541/0xa50 kernel/smpboot.c:160 kthread+0x726/0x8b0 kernel/kthread.c:463 ret_from_fork+0x51b/0xa40 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 ---[ end trace 0000000000000000 ]--- RIP: 0010:f2fs_write_end_io+0xf91/0xfd0 fs/f2fs/data.c:355 Code: c6 c0 e9 79 8b e8 df 48 08 fd 90 0f 0b e8 97 c7 a3 fd 4c 89 ef 48 c7 c6 c0 e9 79 8b e8 c8 48 08 fd 90 0f 0b e8 80 c7 a3 fd 90 <0f> 0b e8 78 c7 a3 fd 4c 89 ef 48 c7 c6 c0 e9 79 8b e8 a9 48 08 fd RSP: 0018:ffffc90000147ac8 EFLAGS: 00010246 RAX: ffffffff841f6fc0 RBX: 000000000000000b RCX: ffff88801c6f3c80 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000100 RBP: ffff888000000000 R08: 0000000000000000 R09: 0000000000000100 R10: dffffc0000000000 R11: fffff940001a5441 R12: 0000000034a88000 R13: ffffea0000d2a200 R14: 0000000000000000 R15: 0000000000000006 FS: 0000000000000000(0000) GS:ffff8881265c9000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000020000000ac44 CR3: 000000002b95c000 CR4: 00000000003526f0