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.
Cluster 8 out of range (1). Setting to EOF.
Reserved field in VFAT long filename slot is not 0 (but 0xff).
Auto-setting to 0.
Wrong checksum for long file name "file.".
  (Short name FILE~1.COL may have changed without updating the long name)
  Not auto-correcting this.
/file0
  File size is 0 bytes, cluster chain length is > 0 bytes.
  Truncating file to 0 bytes.
/f
  File size is 9000 bytes, cluster chain length is 1536 bytes.
  Truncating file to 1536 bytes.
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 17 unused clusters (8704 bytes).
Dirty bit is set. Fs was not properly unmounted and some data may be corrupt.
 Automatically removing dirty bit.

Leaving filesystem unchanged.
/tmp/3476947398.img: 5 files, 5/8120 clusters