• Andy Leiserson's avatar
    [PATCH] fix calculation of meta_bg descriptor backups · 904dad47
    Andy Leiserson authored
    "group" is the group where the backup will be placed, and is
    initialized to zero in the declaration. This meant that backups for
    meta_bg descriptors were erroneously written to the backup block group
    descriptors in groups 1 and (desc_per_block-1).
    
    Reproduction information:
      mke2fs -Fq -t ext4 -b 1024 -O ^resize_inode /tmp/foo.img 16G
      truncate -s 24G /tmp/foo.img
      losetup /dev/loop0 /tmp/foo.img
      mount /dev/loop0 /mnt
      resize2fs /dev/loop0
      umount /dev/loop0
      dd if=/dev/zero of=/dev/loop0 bs=1024 count=2
      e2fsck -fy /dev/loop0
      losetup -d /dev/loop0
    Signed-off-by: default avatarAndy Leiserson <andy@leiserson.org>
    Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
    Cc: stable@vger.kernel.org
    904dad47
resize.c 57.6 KB