sanitized_reproducer

#! /bin/sh

[ -f sanitized_e2.img ] || unzstd --sparse sanitized_e2.img.zst

tar cf - sanitized_e2.img --sparse --transform 's,sanitized_e2.img,work.img,' | tar xf - --sparse # same as "cp --sparse=always" but also works on busybox (requires gnu tar)

rm -f stat.before extents.before \
      stat.after  extents.after

debugfs -R 'stat large_file' work.img > stat.before
debugfs -R 'extents large_file' work.img > extents.before

e2fsck -f -p work.img
if [ $? -gt 3 ]; then
  echo "first e2fsck failed"
  exit 1
fi

if ! resize2fs work.img 1500000000k; then
  echo "resize2fs failed"
  exit 1
fi

e2fsck -f -p work.img
if [ $? -le 3 ]; then
  echo "second e2fsck succeeded"
  exit
fi

echo "second e2fsck failed"
e2fsck -f -n work.img
debugfs -R 'stat large_file' work.img > stat.after
debugfs -R 'extents large_file' work.img > extents.after