------------[ cut here ]------------ kernel BUG at fs/f2fs/data.c:387! 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 02/12/2026 RIP: 0010:f2fs_write_end_io+0xfb9/0xff0 fs/f2fs/data.c:387 Code: c6 a0 87 9a 8b e8 07 3a fb fc 90 0f 0b e8 8f cd 97 fd 4c 89 ef 48 c7 c6 a0 87 9a 8b e8 f0 39 fb fc 90 0f 0b e8 78 cd 97 fd 90 <0f> 0b e8 70 cd 97 fd 4c 89 ef 48 c7 c6 a0 87 9a 8b e8 d1 39 fb fc RSP: 0018:ffffc90000147b30 EFLAGS: 00010246 RAX: ffffffff842c8658 RBX: 0000000000000000 RCX: ffff88801caa9e80 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000100 RBP: 0000000033fff000 R08: 0000000000000000 R09: 0000000000000100 R10: dffffc0000000000 R11: fffffbfff1ed4617 R12: 0000000000000006 R13: ffffea0000cfffc0 R14: 0000000000000003 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff88812633f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff42b736020 CR3: 000000002bf9a000 CR4: 00000000003526f0 Call Trace: blk_update_request+0x57e/0xe60 block/blk-mq.c:1016 blk_mq_end_request+0x3e/0x70 block/blk-mq.c:1178 blk_complete_reqs block/blk-mq.c:1253 [inline] blk_done_softirq+0x10a/0x160 block/blk-mq.c:1258 handle_softirqs+0x1de/0x6f0 kernel/softirq.c:622 run_ksoftirqd+0x52/0x180 kernel/softirq.c:1063 smpboot_thread_fn+0x541/0xa50 kernel/smpboot.c:160 kthread+0x388/0x470 kernel/kthread.c:436 ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:f2fs_write_end_io+0xfb9/0xff0 fs/f2fs/data.c:387 Code: c6 a0 87 9a 8b e8 07 3a fb fc 90 0f 0b e8 8f cd 97 fd 4c 89 ef 48 c7 c6 a0 87 9a 8b e8 f0 39 fb fc 90 0f 0b e8 78 cd 97 fd 90 <0f> 0b e8 70 cd 97 fd 4c 89 ef 48 c7 c6 a0 87 9a 8b e8 d1 39 fb fc RSP: 0018:ffffc90000147b30 EFLAGS: 00010246 RAX: ffffffff842c8658 RBX: 0000000000000000 RCX: ffff88801caa9e80 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000100 RBP: 0000000033fff000 R08: 0000000000000000 R09: 0000000000000100 R10: dffffc0000000000 R11: fffffbfff1ed4617 R12: 0000000000000006 R13: ffffea0000cfffc0 R14: 0000000000000003 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff88812633f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff42b736020 CR3: 000000002bf9a000 CR4: 00000000003526f0