Jan Kara f3233cb248 ext4: fix fencepost error in check for inode count overflow during resize
commit 4f2f76f751433908364ccff82f437a57d0e6e9b7 upstream.

ext4_resize_fs() has an off-by-one bug when checking whether growing of
a filesystem will not overflow inode count. As a result it allows a
filesystem with 8192 inodes per group to grow to 64TB which overflows
inode count to 0 and makes filesystem unusable. Fix it.

Cc: stable@vger.kernel.org
Fixes: 3f8a6411fbada1fa482276591e037f3b1adcf55b
Reported-by: Jaco Kroon <jaco@uls.co.za>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-06-26 08:06:29 +08:00
..
2018-06-21 04:02:59 +09:00
2018-05-30 07:52:35 +02:00
2018-04-19 08:56:21 +02:00
2018-06-05 11:41:54 +02:00
2017-09-04 19:05:15 -04:00
2018-05-16 10:10:25 +02:00