loop0: detected capacity change from 0 to 128
VFS: Found a Xenix FS (block size = 512) on device loop0
loop0: detected capacity change from 128 to 0
=======================================================
WARNING: The mand mount option has been deprecated and
         and is ignored by this kernel. Remove the mand
         option from the mount to silence this warning.
=======================================================
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5319 at fs/buffer.c:1173 mark_buffer_dirty+0x2c6/0x440 fs/buffer.c:1173
Modules linked in:
CPU: 0 UID: 0 PID: 5319 Comm: syz.0.0 Not tainted 6.13.0-rc3-syzkaller-00017-gf44d154d6e3d #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:mark_buffer_dirty+0x2c6/0x440 fs/buffer.c:1173
Code: 4c 89 f7 e8 7c 54 dc ff 49 8b 3e be 20 00 00 00 5b 41 5c 41 5e 41 5f 5d e9 97 de fb ff e8 b2 eb 75 ff eb 8b e8 ab eb 75 ff 90 <0f> 0b 90 e9 82 fd ff ff e8 9d eb 75 ff 90 0f 0b 90 e9 a9 fd ff ff
RSP: 0018:ffffc9000d5bf488 EFLAGS: 00010293
RAX: ffffffff82298845 RBX: ffff888043512c01 RCX: ffff88801f0ec880
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff822985c3 R09: 1ffff110087547d0
R10: dffffc0000000000 R11: ffffed10087547d1 R12: 0000000000000007
R13: ffff888043512c0c R14: ffff888043aa3e80 R15: dffffc0000000000
FS:  00007fc33ba5d6c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055558c90d7c8 CR3: 0000000040622000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 dirty_sb fs/sysv/sysv.h:117 [inline]
 sysv_new_block+0x607/0x970 fs/sysv/balloc.c:150
 alloc_branch fs/sysv/itree.c:135 [inline]
 get_block+0x30a/0x16d0 fs/sysv/itree.c:254
 __block_write_begin_int+0x692/0x19a0 fs/buffer.c:2116
 block_write_begin+0x8f/0x120 fs/buffer.c:2226
 sysv_write_begin+0x31/0x70 fs/sysv/itree.c:490
 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_pwritev fs/read_write.c:1192 [inline]
 __se_sys_pwritev fs/read_write.c:1187 [inline]
 __x64_sys_pwritev+0x1b7/0x2d0 fs/read_write.c:1187
 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: 0033:0x7fc33ab85d29
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:00007fc33ba5d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000128
RAX: ffffffffffffffda RBX: 00007fc33ad75fa0 RCX: 00007fc33ab85d29
RDX: 0000000000000001 RSI: 0000000020000000 RDI: 0000000000000006
RBP: 00007fc33ac01a20 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000802006 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fc33ad75fa0 R15: 00007ffd530a5be8
 </TASK>