NILFS error (device loop0): nilfs_check_folio: bad entry in directory #12: rec_len is smaller than minimal - offset=0, inode=0, rec_len=0, name_len=0
NILFS (loop0): unable to write superblock: err=-5
Remounting filesystem read-only
NILFS error (device loop0): nilfs_readdir: bad page in #12
------------[ cut here ]------------
kernel BUG at fs/buffer.c:2785!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5210 Comm: syz-executor Not tainted 6.12.0-rc3-syzkaller-00044-g2f87d0916ce0 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:submit_bh_wbc+0x556/0x560 fs/buffer.c:2785
Code: 89 fa e8 1d d9 d1 02 e9 95 fe ff ff e8 f3 72 71 ff 90 0f 0b e8 eb 72 71 ff 90 0f 0b e8 e3 72 71 ff 90 0f 0b e8 db 72 71 ff 90 <0f> 0b e8 d3 72 71 ff 90 0f 0b 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc9000253f618 EFLAGS: 00010293
RAX: ffffffff82237475 RBX: 0000000000000154 RCX: ffff888000800000
RDX: 0000000000000000 RSI: 0000000000000100 RDI: 0000000000000000
RBP: 0000000000000100 R08: ffffffff82237039 R09: 1ffff1100639095c
R10: dffffc0000000000 R11: ffffed100639095d R12: 0000000000000000
R13: ffff888031c84ae0 R14: 0000000000000000 R15: 1ffff1100639095c
FS:  0000555563876500(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fddb347fb98 CR3: 00000000566ca000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 submit_bh fs/buffer.c:2824 [inline]
 block_read_full_folio+0x93b/0xcd0 fs/buffer.c:2451
 do_mpage_readpage+0x1a73/0x1c80 fs/mpage.c:317
 mpage_read_folio+0x108/0x1e0 fs/mpage.c:392
 filemap_read_folio+0x14b/0x630 mm/filemap.c:2367
 do_read_cache_folio+0x3f5/0x850 mm/filemap.c:3825
 read_mapping_folio include/linux/pagemap.h:1011 [inline]
 nilfs_get_folio+0x4b/0x240 fs/nilfs2/dir.c:190
 nilfs_readdir+0x1b3/0x7d0 fs/nilfs2/dir.c:251
 iterate_dir+0x571/0x800 fs/readdir.c:108
 __do_sys_getdents64 fs/readdir.c:407 [inline]
 __se_sys_getdents64+0x1d3/0x4a0 fs/readdir.c:392
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5be9db0193
Code: c1 66 0f 1f 44 00 00 48 83 c4 08 48 89 ef 5b 5d e9 42 43 f8 ff 66 90 b8 ff ff ff 7f 48 39 c2 48 0f 47 d0 b8 d9 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 05 c3 0f 1f 40 00 48 c7 c2 a8 ff ff ff f7 d8
RSP: 002b:00007ffe94f96358 EFLAGS: 00000293 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 0000555563899640 RCX: 00007f5be9db0193
RDX: 0000000000008000 RSI: 0000555563899640 RDI: 0000000000000006
RBP: 0000555563899614 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000001000 R11: 0000000000000293 R12: ffffffffffffffa8
R13: 0000000000000016 R14: 0000555563899610 R15: 00007ffe94f996f0
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:submit_bh_wbc+0x556/0x560 fs/buffer.c:2785
Code: 89 fa e8 1d d9 d1 02 e9 95 fe ff ff e8 f3 72 71 ff 90 0f 0b e8 eb 72 71 ff 90 0f 0b e8 e3 72 71 ff 90 0f 0b e8 db 72 71 ff 90 <0f> 0b e8 d3 72 71 ff 90 0f 0b 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc9000253f618 EFLAGS: 00010293
RAX: ffffffff82237475 RBX: 0000000000000154 RCX: ffff888000800000
RDX: 0000000000000000 RSI: 0000000000000100 RDI: 0000000000000000
RBP: 0000000000000100 R08: ffffffff82237039 R09: 1ffff1100639095c
R10: dffffc0000000000 R11: ffffed100639095d R12: 0000000000000000
R13: ffff888031c84ae0 R14: 0000000000000000 R15: 1ffff1100639095c
FS:  0000555563876500(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fddb347fb98 CR3: 00000000566ca000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400