loop0: detected capacity change from 0 to 8192
=======================================================
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.
=======================================================
FAT-fs (loop0): Volume was not properly unmounted. Some data may be corrupt. Please run fsck.
Buffer I/O error on dev loop0, logical block 33, lost sync page write
Buffer I/O error on dev loop0, logical block 1, lost sync page write
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5323 at fs/buffer.c:1189 mark_buffer_dirty+0x2a9/0x410 fs/buffer.c:1189
Modules linked in:
CPU: 0 UID: 0 PID: 5323 Comm: syz.0.0 Not tainted 6.16.0-rc3-syzkaller-00044-g7595b66ae9de #0 PREEMPT(full) 
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+0x2a9/0x410 fs/buffer.c:1189
Code: 4c 89 f7 e8 c9 b9 dd ff 49 8b 3e be 20 00 00 00 5b 41 5c 41 5e 41 5f 5d e9 94 33 fc ff e8 df 36 7a ff eb 8c e8 d8 36 7a ff 90 <0f> 0b 90 e9 95 fd ff ff e8 ca 36 7a ff 90 0f 0b 90 e9 bf fd ff ff
RSP: 0018:ffffc9000d48f0f0 EFLAGS: 00010283
RAX: ffffffff82461648 RBX: ffff888044533570 RCX: 0000000000100000
RDX: ffffc9000e2ca000 RSI: 0000000000021022 RDI: 0000000000021023
RBP: ffffc9000d48f201 R08: ffff888044533577 R09: 1ffff110088a66ae
R10: dffffc0000000000 R11: ffffed10088a66af R12: dffffc0000000000
R13: ffff888044533570 R14: 1ffff92001a91e38 R15: ffff888044665a50
FS:  00007ff45e3806c0(0000) GS:ffff88808d251000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000140 CR3: 0000000043e0d000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __fat_write_inode+0x805/0xa50 fs/fat/inode.c:903
 fat_free fs/fat/file.c:332 [inline]
 fat_truncate_blocks+0x38c/0xaf0 fs/fat/file.c:394
 fat_write_failed fs/fat/inode.c:218 [inline]
 fat_write_begin+0x127/0x150 fs/fat/inode.c:232
 generic_perform_write+0x2c7/0x910 mm/filemap.c:4112
 __generic_file_write_iter+0x1ae/0x230 mm/filemap.c:4226
 generic_file_write_iter+0x10f/0x540 mm/filemap.c:4255
 iter_file_splice_write+0x93a/0x1000 fs/splice.c:738
 do_splice_from fs/splice.c:935 [inline]
 direct_splice_actor+0x101/0x160 fs/splice.c:1158
 splice_direct_to_actor+0x5a5/0xcc0 fs/splice.c:1102
 do_splice_direct_actor fs/splice.c:1201 [inline]
 do_splice_direct+0x181/0x270 fs/splice.c:1227
 do_sendfile+0x4da/0x7e0 fs/read_write.c:1370
 __do_sys_sendfile64 fs/read_write.c:1431 [inline]
 __se_sys_sendfile64+0x13e/0x190 fs/read_write.c:1417
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff45d58e929
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:00007ff45e380038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007ff45d7b5fa0 RCX: 00007ff45d58e929
RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000006
RBP: 00007ff45d610b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000080000002 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ff45d7b5fa0 R15: 00007ffffb440bd8
 </TASK>