audit: type=1800 audit(1672431232.541:2): pid=7994 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor392" name="bus" dev="loop0" ino=18 res=0 NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds ------------[ cut here ]------------ kernel BUG at mm/filemap.c:1154! invalid opcode: 0000 [#1] PREEMPT SMP KASAN Modules linked in: CPU: 0 PID: 7999 Comm: segctord Not tainted 4.14.302-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 task: ffff8880b29562c0 task.stack: ffff888095fb8000 RIP: 0010:end_page_writeback+0x1a2/0x1c0 mm/filemap.c:1154 RSP: 0018:ffff888095fbfb70 EFLAGS: 00010297 RAX: ffff8880b29562c0 RBX: ffffea000269a740 RCX: 1ffff1101652ad6e RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000282 RBP: ffffea000269a740 R08: ffffffff8b9dca70 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000000 R12: ffffea000269a760 R13: ffffea00027e3b20 R14: dffffc0000000000 R15: ffff88808e364400 FS: 0000000000000000(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055e4bb6d02c8 CR3: 0000000098c95000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: nilfs_segctor_complete_write fs/nilfs2/segment.c:1855 [inline] nilfs_segctor_wait fs/nilfs2/segment.c:1942 [inline] nilfs_segctor_do_construct+0x4bf4/0x79c0 fs/nilfs2/segment.c:2105 nilfs_segctor_construct+0x6db/0x8e0 fs/nilfs2/segment.c:2394 nilfs_segctor_thread_construct fs/nilfs2/segment.c:2502 [inline] nilfs_segctor_thread+0x3ad/0xdb0 fs/nilfs2/segment.c:2586 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:406 Code: 89 e7 e8 f2 76 16 00 e9 53 ff ff ff 48 89 df e8 e5 76 16 00 e9 ce fe ff ff 4c 89 e7 e8 d8 76 16 00 e9 90 fe ff ff e8 ce b5 ec ff <0f> 0b 48 89 ef e8 c4 76 16 00 e9 4d ff ff ff 66 66 2e 0f 1f 84 RIP: end_page_writeback+0x1a2/0x1c0 mm/filemap.c:1154 RSP: ffff888095fbfb70 ---[ end trace 0d62e84782b49dfd ]---