loop4: detected capacity change from 0 to 64
------------[ cut here ]------------
WARNING: CPU: 0 PID: 13672 at fs/buffer.c:1173 mark_buffer_dirty+0x2c6/0x440 fs/buffer.c:1173
Modules linked in:
CPU: 0 UID: 0 PID: 13672 Comm: syz.4.529 Not tainted 6.13.0-rc3-syzkaller-00073-geabcdba3ad40 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024
RIP: 0010:mark_buffer_dirty+0x2c6/0x440 fs/buffer.c:1173
Code: 4c 89 f7 e8 bc 58 dc ff 49 8b 3e be 20 00 00 00 5b 41 5c 41 5e 41 5f 5d e9 97 de fb ff e8 f2 83 78 ff eb 8b e8 eb 83 78 ff 90 <0f> 0b 90 e9 82 fd ff ff e8 dd 83 78 ff 90 0f 0b 90 e9 a9 fd ff ff
RSP: 0018:ffffc9000fc4f660 EFLAGS: 00010283
RAX: ffffffff8226efb5 RBX: ffff888058552301 RCX: 0000000000080000
RDX: ffffc9000d911000 RSI: 0000000000000891 RDI: 0000000000000892
RBP: 0000000000000000 R08: ffffffff8226ed33 R09: 1ffff1100f778400
R10: dffffc0000000000 R11: ffffed100f778401 R12: dffffc0000000000
R13: ffff88807bbc2000 R14: ffff88807bbc2000 R15: ffff888055d26200
FS:  00007fe3a17cd6c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd583ba1440 CR3: 00000000626fe000 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+0xadd/0xb70 fs/bfs/file.c:126
 __block_write_begin_int+0x692/0x19a0 fs/buffer.c:2116
 block_write_begin+0x8f/0x120 fs/buffer.c:2226
 bfs_write_begin+0x35/0xd0 fs/bfs/file.c:179
 generic_perform_write+0x346/0x990 mm/filemap.c:4055
 generic_file_write_iter+0xae/0x310 mm/filemap.c:4182
 do_iter_readv_writev+0x600/0x880
 vfs_writev+0x376/0xba0 fs/read_write.c:1050
 do_pwritev fs/read_write.c:1146 [inline]
 __do_sys_pwritev2 fs/read_write.c:1204 [inline]
 __se_sys_pwritev2+0x196/0x2b0 fs/read_write.c:1195
 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: 0033:0x7fe3a0985d29
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:00007fe3a17cd038 EFLAGS: 00000246 ORIG_RAX: 0000000000000148
RAX: ffffffffffffffda RBX: 00007fe3a0b75fa0 RCX: 00007fe3a0985d29
RDX: 0000000000000001 RSI: 00000000200001c0 RDI: 0000000000000006
RBP: 00007fe3a0a01a20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000e7b R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fe3a0b75fa0 R15: 00007fff1d8af6c8
 </TASK>