------------[ cut here ]------------
WARNING: CPU: 0 PID: 29625 at fs/buffer.c:1186 mark_buffer_dirty+0x2a9/0x410 fs/buffer.c:1186
Modules linked in:
CPU: 0 UID: 0 PID: 29625 Comm: syz.8.7009 Not tainted 6.15.0-rc6-syzkaller-00208-g3c21441eeffc #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:mark_buffer_dirty+0x2a9/0x410 fs/buffer.c:1186
Code: 4c 89 f7 e8 f9 09 de ff 49 8b 3e be 20 00 00 00 5b 41 5c 41 5e 41 5f 5d e9 44 36 fc ff e8 8f 10 7c ff eb 8c e8 88 10 7c ff 90 <0f> 0b 90 e9 95 fd ff ff e8 7a 10 7c ff 90 0f 0b 90 e9 bf fd ff ff
RSP: 0018:ffffc90003a07508 EFLAGS: 00010283
RAX: ffffffff8243e168 RBX: ffff888039600740 RCX: 0000000000080000
RDX: ffffc90018fbe000 RSI: 00000000000009e9 RDI: 00000000000009ea
RBP: ffff88807bf82001 R08: ffff888039600747 R09: 1ffff110072c00e8
R10: dffffc0000000000 R11: ffffed10072c00e9 R12: ffff88804c65b800
R13: ffff8880396002b8 R14: ffff888039600740 R15: 000000000000000a
FS:  00007f3c1e1706c0(0000) GS:ffff8881260c7000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3577884f98 CR3: 0000000058e38000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 bfs_move_block fs/bfs/file.c:44 [inline]
 bfs_move_blocks fs/bfs/file.c:57 [inline]
 bfs_get_block+0x5da/0xae0 fs/bfs/file.c:126
 __block_write_full_folio+0x30b/0xe10 fs/buffer.c:1889
 __mpage_writepage+0xb97/0x1c70 fs/mpage.c:636
 write_cache_pages+0x64/0x100 mm/page-writeback.c:2613
 mpage_writepages+0xd9/0x180 fs/mpage.c:663
 do_writepages+0x3b1/0x7b0 mm/page-writeback.c:2656
 filemap_fdatawrite_wbc mm/filemap.c:386 [inline]
 __filemap_fdatawrite_range+0x1a3/0x250 mm/filemap.c:419
 sync_file_range+0x1ee/0x2b0 fs/sync.c:289
 ksys_sync_file_range fs/sync.c:360 [inline]
 __do_sys_sync_file_range fs/sync.c:366 [inline]
 __se_sys_sync_file_range fs/sync.c:363 [inline]
 __x64_sys_sync_file_range+0xc0/0x110 fs/sync.c:363
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3c1d38e969
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:00007f3c1e170038 EFLAGS: 00000246 ORIG_RAX: 0000000000000115
RAX: ffffffffffffffda RBX: 00007f3c1d5b5fa0 RCX: 00007f3c1d38e969
RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000004
RBP: 00007f3c1d410ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000006 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f3c1d5b5fa0 R15: 00007ffcb28eca68
 </TASK>