fsck.vfat -n exited with status code 1
fsck.fat 4.2 (2021-01-31)
FATs differ but appear to be intact.
  Using first FAT.
Wrong checksum for long file name "file0".
  (Short name \345 may have changed without updating the long name)
  Not auto-correcting this.
Wrong checksum for long file name "file.cold".
  (Short name FILE~1.C\377\225 may have changed without updating the long name)
  Not auto-correcting this.
/file0
  Bad short file name (\345).
  Auto-renaming it.
  Renamed to FSCK0000.000
/FSCK0000.000
 Start does point to root directory. Deleting dir. 
/í
  File size is 2097152 bytes, cluster chain length is 0 bytes.
  Truncating file to 0 bytes.
/:0Lc
  Contains a free cluster (6). Assuming EOF.
/:0Lc
  File size is 9000 bytes, cluster chain length is 0 bytes.
  Truncating file to 0 bytes.
/file.cold
  Directory has non-zero size. Fixing it.
/file.cold
  Contains a free cluster (7). Assuming EOF.
Volume label 'SYZKALLER' stored in root directory and label '' stored in boot sector and different.
  Auto-copying volume label from root directory to boot sector.
Reclaimed 1 unused cluster (16384 bytes).

Leaving filesystem unchanged.
/tmp/3536038173.img: 5 files, 0/7 clusters