fsck.vfat -n exited with status code 1
fsck.fat 4.2 (2021-01-31)
Wrong checksum for long file name "file0".
  (Short name ILE may have changed without updating the long name)
  Not auto-correcting this.
Wrong checksum for long file name "fi:Fvie.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 (ILE).
  Auto-renaming it.
  Renamed to FSCK0000.000
/:07-
  File size is 10167080 bytes, cluster chain length is 16384 bytes.
  Truncating file to 16384 bytes.
/fi:Fvie.cold
  Directory has non-zero size. Fixing it.
/fi:Fvie.cold/syzkalle.rsy
  Expected a valid '.' entry in this slot.
  Moving entry down.
/fi:Fvie.cold/llersyzk.all
  Expected a valid '..' entry in this slot.
  Moving entry down.
/fi:Fvie.cold/lrs
  Bad short file name (lrs).
  Auto-renaming it.
  Renamed to FSCK0000.000
/fi:Fvie.cold/llersyzk.all
  Bad short file name (llersyzk.all).
  Auto-renaming it.
  Renamed to FSCK0000.001
/fi:Fvie.cold/yzkaller.syz
  Start cluster beyond limit (31091 > 8). Truncating file.
/fi:Fvie.cold/yzkaller.syz
  File size is 1818323834 bytes, cluster chain length is 0 bytes.
  Truncating file to 0 bytes.
/fi:Fvie.cold/syzkalle.rsy
  Directory has non-zero size. Fixing it.
/fi:Fvie.cold/syzkalle.rsy
  Start cluster beyond limit (29554 > 8). Truncating file.
/fi:Fvie.cold/FSCK0000.001
  File size is 1929405696 bytes, cluster chain length is 0 bytes.
  Truncating file to 0 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 2 unused clusters (32768 bytes).

Leaving filesystem unchanged.
/tmp/1446434047.img: 9 files, 3/7 clusters