NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds
NILFS (loop0): bad btree node (ino=3, blocknr=63): level = 0, flags = 0x0, nchildren = 0
NILFS error (device loop0): nilfs_bmap_lookup_at_level: broken bmap (inode number=3)
segctord: attempt to access beyond end of device
loop0: rw=2049, sector=4088, nr_sectors = 2 limit=3839
Buffer I/O error on dev loop0, logical block 2044, lost sync page write
Remounting filesystem read-only
NILFS (loop0): I/O error reading meta-data file (ino=5, block-offset=0)
------------[ cut here ]------------
ret
WARNING: fs/nilfs2/segment.c:1507 at nilfs_cancel_segusage fs/nilfs2/segment.c:1507 [inline], CPU#0: segctord/5330
WARNING: fs/nilfs2/segment.c:1507 at nilfs_segctor_abort_construction+0xd89/0xdf0 fs/nilfs2/segment.c:1873, CPU#0: segctord/5330
Modules linked in:
CPU: 0 UID: 0 PID: 5330 Comm: segctord Not tainted syzkaller #0 PREEMPT(full)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:nilfs_cancel_segusage fs/nilfs2/segment.c:1507 [inline]
RIP: 0010:nilfs_segctor_abort_construction+0xd89/0xdf0 fs/nilfs2/segment.c:1873
Code: 8b 05 4b 03 86 0f 48 3b 84 24 a0 00 00 00 75 3e 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc e8 f8 23 0c fe 90 <0f> 0b 90 e9 cc f9 ff ff e8 ea 23 0c fe 90 0f 0b 90 e9 60 fb ff ff
RSP: 0018:ffffc9000c19f600 EFLAGS: 00010293
RAX: ffffffff83ba1cf8 RBX: ffff88801fc52428 RCX: ffff888000b80000
RDX: 0000000000000000 RSI: 00000000fffffffb RDI: 0000000000000000
RBP: ffffc9000c19f6f0 R08: ffff888012b5ec07 R09: 1ffff1100256bd80
R10: dffffc0000000000 R11: ffffed100256bd81 R12: 0000000000000002
R13: ffff88801fc52498 R14: ffff88801fc825b0 R15: 00000000fffffffb
FS: 0000000000000000(0000) GS:ffff88808c81e000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffeadb26380 CR3: 000000004323d000 CR4: 0000000000352ef0
Call Trace:
<TASK>
nilfs_segctor_do_construct+0x72e1/0x7bb0 fs/nilfs2/segment.c:2186
nilfs_segctor_construct+0x170/0x690 fs/nilfs2/segment.c:2462
nilfs_segctor_thread_construct fs/nilfs2/segment.c:2592 [inline]
nilfs_segctor_thread+0x6c9/0xdb0 fs/nilfs2/segment.c:2706
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
</TASK>