NILFS error (device loop8): nilfs_bmap_lookup_contig: broken bmap (inode number=15)
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WARNING: mm/page-writeback.c:2710 at __folio_mark_dirty+0x1fb/0xe00 mm/page-writeback.c:2710, CPU#1: syz.8.493/11231
Modules linked in:
CPU: 1 UID: 0 PID: 11231 Comm: syz.8.493 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:__folio_mark_dirty+0x1fb/0xe00 mm/page-writeback.c:2710
Code: 3c 38 00 74 08 48 89 df e8 62 d2 26 00 4c 8b 33 4c 89 f6 48 83 e6 08 31 ff e8 01 6c c4 ff 49 83 e6 08 75 1c e8 96 66 c4 ff 90 <0f> 0b 90 eb 16 e8 8b 66 c4 ff e9 6e 07 00 00 e8 81 66 c4 ff eb 05
RSP: 0018:ffffc90006db7600 EFLAGS: 00010287
RAX: ffffffff81fbfbfa RBX: ffffea00019e2cc0 RCX: 0000000000080000
RDX: ffffc90012f7c000 RSI: 0000000000001e54 RDI: 0000000000001e55
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff9400033c599 R12: ffff88805f7ac0a8
R13: ffff88805f7ac0a0 R14: 0000000000000000 R15: dffffc0000000000
FS:  00007f78a8fe66c0(0000) GS:ffff888126e03000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6e3de0b000 CR3: 000000003221c000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 filemap_dirty_folio+0x10d/0x190 mm/page-writeback.c:2742
 nilfs_dirty_folio+0x50/0x360 fs/nilfs2/inode.c:183
 __bio_release_pages+0x103/0x1a0 block/bio.c:1151
 bio_release_pages include/linux/bio.h:474 [inline]
 dio_bio_complete fs/direct-io.c:515 [inline]
 dio_await_completion fs/direct-io.c:534 [inline]
 __blockdev_direct_IO+0x2a1d/0x31f0 fs/direct-io.c:1300
 blockdev_direct_IO include/linux/fs.h:3075 [inline]
 nilfs_direct_IO+0xef/0x120 fs/nilfs2/inode.c:269
 generic_file_read_iter+0x328/0x520 mm/filemap.c:2969
 new_sync_read fs/read_write.c:491 [inline]
 vfs_read+0x563/0xa30 fs/read_write.c:572
 ksys_read+0x14b/0x260 fs/read_write.c:715
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f78aad7f749
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f78a8fe6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007f78aafd5fa0 RCX: 00007f78aad7f749
RDX: 0000000000001000 RSI: 0000200000001400 RDI: 0000000000000005
RBP: 00007f78aae03f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f78aafd6038 R14: 00007f78aafd5fa0 R15: 00007ffc857710f8
 </TASK>