Commits
Theodore Ts'o authored and Konstantin Khorenko committed b8934960efb
ms/ext4: fix online resize's handling of a too-small final block group commit f0a459dec5495a3580f8d784555e6f8f3bf7f263 Author: Theodore Ts'o <tytso@mit.edu> Date: Mon Sep 3 22:19:43 2018 -0400 ext4: fix online resize's handling of a too-small final block group Avoid growing the file system to an extent so that the last block group is too small to hold all of the metadata that must be stored in the block group. This problem can be triggered with the following reproducer: umount /mnt mke2fs -F -m0 -b 4096 -t ext4 -O resize_inode,^has_journal \ -E resize=1073741824 /tmp/foo.img 128M mount /tmp/foo.img /mnt truncate --size 1708M /tmp/foo.img resize2fs /dev/loop0 295400 umount /mnt e2fsck -fy /tmp/foo.img Reported-by: Torsten Hilbrich <torsten.hilbrich@secunet.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu> Cc: stable@vger.kernel.org fixes "attempt to access beyond end of device" https://jira.sw.ru/browse/PSBM-89583 Signed-off-by: Vasily Averin <vvs@virtuozzo.com>