loop0: detected capacity change from 0 to 64
------------[ cut here ]------------
WARNING: CPU: 1 PID: 4123 at fs/buffer.c:1084 mark_buffer_dirty+0x325/0x4b0
Modules linked in:
CPU: 1 PID: 4123 Comm: syz.0.92 Not tainted 5.15.167-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:mark_buffer_dirty+0x325/0x4b0 fs/buffer.c:1084
Code: 89 df e8 fe 8a e4 ff 48 8b 3b be 04 00 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d e9 e7 7f fc ff e8 c2 c0 9a ff eb 80 e8 bb c0 9a ff <0f> 0b e9 27 fd ff ff e8 af c0 9a ff 0f 0b e9 46 fd ff ff e8 a3 c0
RSP: 0018:ffffc900035ff7a0 EFLAGS: 00010287
RAX: ffffffff81e599b5 RBX: ffff88805cc3b200 RCX: 0000000000040000
RDX: ffffc900033b1000 RSI: 0000000000007994 RDI: 0000000000007995
RBP: 0000000000000000 R08: ffffffff81e596d4 R09: ffffed100b9f9700
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888073e93828
R13: dffffc0000000000 R14: 1ffff1100e7d2705 R15: dffffc0000000000
FS:  00007f0c8f12a6c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f77538125e8 CR3: 0000000068085000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 bfs_move_block fs/bfs/file.c:43 [inline]
 bfs_move_blocks fs/bfs/file.c:56 [inline]
 bfs_get_block+0x852/0xac0 fs/bfs/file.c:125
 __block_write_begin_int+0x60b/0x1650 fs/buffer.c:2012
 __block_write_begin fs/buffer.c:2062 [inline]
 block_write_begin+0x4f/0xc0 fs/buffer.c:2122
 bfs_write_begin+0x38/0xd0 fs/bfs/file.c:177
 generic_perform_write+0x2bf/0x5b0 mm/filemap.c:3785
 __generic_file_write_iter+0x243/0x4f0 mm/filemap.c:3912
 generic_file_write_iter+0xa7/0x1b0 mm/filemap.c:3944
 call_write_iter include/linux/fs.h:2172 [inline]
 new_sync_write fs/read_write.c:507 [inline]
 vfs_write+0xacd/0xe50 fs/read_write.c:594
 ksys_write+0x1a2/0x2c0 fs/read_write.c:647
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f0c90cb1ff9
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:00007f0c8f12a038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f0c90e69f80 RCX: 00007f0c90cb1ff9
RDX: 0000000000001006 RSI: 0000000020000940 RDI: 0000000000000005
RBP: 00007f0c90d24296 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f0c90e69f80 R15: 00007fffb960ee98
 </TASK>