------------[ cut here ]------------
WARNING: CPU: 1 PID: 6853 at fs/buffer.c:1173 mark_buffer_dirty+0x2c6/0x440 fs/buffer.c:1173
Modules linked in:
CPU: 1 UID: 0 PID: 6853 Comm: syz.2.115 Not tainted 6.15.0-rc2-syzkaller-00037-g834a4a689699 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:mark_buffer_dirty+0x2c6/0x440 fs/buffer.c:1173
Code: 4c 89 f7 e8 7c 13 db ff 49 8b 3e be 20 00 00 00 5b 41 5c 41 5e 41 5f 5d e9 87 bb fb ff e8 d2 6a 73 ff eb 8b e8 cb 6a 73 ff 90 <0f> 0b 90 e9 82 fd ff ff e8 bd 6a 73 ff 90 0f 0b 90 e9 a9 fd ff ff
RSP: 0018:ffffc9000b0075e0 EFLAGS: 00010287
RAX: ffffffff824fd9a5 RBX: ffff88806fb7a901 RCX: 0000000000080000
RDX: ffffc9000c5a3000 RSI: 0000000000000659 RDI: 000000000000065a
RBP: 0000000000000000 R08: ffffffff824fd723 R09: 1ffff1100df6f5b3
R10: dffffc0000000000 R11: ffffed100df6f5b4 R12: 0000000000000200
R13: dffffc0000000000 R14: ffff88806fb7ad98 R15: ffff88806fb7a910
FS:  00007fbfde7116c0(0000) GS:ffff8881250c9000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055ab5f3c4a18 CR3: 000000005c2e0000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 bfs_move_block fs/bfs/file.c:44 [inline]
 bfs_move_blocks fs/bfs/file.c:57 [inline]
 bfs_get_block+0x63b/0xb60 fs/bfs/file.c:126
 __block_write_begin_int+0x691/0x1930 fs/buffer.c:2116
 block_write_begin+0x8f/0x120 fs/buffer.c:2227
 bfs_write_begin+0x35/0xd0 fs/bfs/file.c:179
 generic_perform_write+0x329/0xa10 mm/filemap.c:4102
 generic_file_write_iter+0x10e/0x5e0 mm/filemap.c:4245
 new_sync_write fs/read_write.c:591 [inline]
 vfs_write+0x70f/0xd10 fs/read_write.c:684
 ksys_write+0x19d/0x2d0 fs/read_write.c:736
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbfdd98d169
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:00007fbfde711038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fbfddba5fa0 RCX: 00007fbfdd98d169
RDX: 0000000000001006 RSI: 0000200000000940 RDI: 0000000000000004
RBP: 00007fbfdda0e990 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fbfddba5fa0 R15: 00007ffc59c84568
 </TASK>