tree eb54afe839feb86c2659bd9f1022f851440de33e
parent d176b1f62f242ab259ff665a26fbac69db1aecba
author Jan Kara <jack@suse.cz> 1595941473 +0200
committer Theodore Ts'o <tytso@mit.edu> 1596823956 -0400

ext4: don't allow overlapping system zones

Currently, add_system_zone() just silently merges two added system zones
that overlap. However the overlap should not happen and it generally
suggests that some unrelated metadata overlap which indicates the fs is
corrupted. We should have caught such problems earlier (e.g. in
ext4_check_descriptors()) but add this check as another line of defense.
In later patch we also use this for stricter checking of journal inode
extent tree.

Reviewed-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20200728130437.7804-3-jack@suse.cz
Signed-off-by: Theodore Ts'o <tytso@mit.edu>