loop2: detected capacity change from 0 to 64
------------[ cut here ]------------
WARNING: CPU: 0 PID: 24313 at fs/buffer.c:1200 mark_buffer_dirty+0x376/0x3e0 fs/buffer.c:1200
Modules linked in:
CPU: 0 PID: 24313 Comm: syz-executor.2 Not tainted 6.4.0-rc2-next-20230515-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/16/2023
RIP: 0010:mark_buffer_dirty+0x376/0x3e0 fs/buffer.c:1200
Code: e9 1f 84 8d ff e8 1a 84 8d ff 48 89 ef e8 a2 51 e8 ff 5b 5d e9 0b 84 8d ff e8 06 84 8d ff 0f 0b e9 10 fe ff ff e8 fa 83 8d ff <0f> 0b e9 b7 fc ff ff e8 ee 83 8d ff 0f 0b e9 d6 fc ff ff 48 89 df
RSP: 0018:ffffc900171d7968 EFLAGS: 00010216
RAX: 000000000001c0d5 RBX: ffff888040145e80 RCX: ffffc9000ad41000
RDX: 0000000000040000 RSI: ffffffff81f69fb6 RDI: 0000000000000001
RBP: ffff8880400f6300 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff888028560000
R13: ffffed10050ac02c R14: ffff888040145e80 R15: 0000000000000010
FS:  00007fc00ce97700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2df21000 CR3: 0000000021a30000 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+0x39b/0xdd0 fs/bfs/file.c:125
 __block_write_begin_int+0x3bd/0x14b0 fs/buffer.c:2134
 __block_write_begin fs/buffer.c:2184 [inline]
 block_write_begin+0xb9/0x4d0 fs/buffer.c:2245
 bfs_write_begin+0x31/0xd0 fs/bfs/file.c:177
 generic_perform_write+0x256/0x570 mm/filemap.c:3896
 __generic_file_write_iter+0x2ae/0x500 mm/filemap.c:4024
 generic_file_write_iter+0xe3/0x350 mm/filemap.c:4056
 call_write_iter include/linux/fs.h:1868 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x945/0xd50 fs/read_write.c:584
 ksys_write+0x12b/0x250 fs/read_write.c:637
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fc00c08c169
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fc00ce97168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fc00c1abf80 RCX: 00007fc00c08c169
RDX: 00000000175d9003 RSI: 0000000020000200 RDI: 0000000000000004
RBP: 00007fc00c0e7ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc0e61040f R14: 00007fc00ce97300 R15: 0000000000022000
 </TASK>