ext4: fix fencepost in s_first_meta_bg validation
authorTheodore Ts'o <tytso@mit.edu>
Wed, 15 Feb 2017 06:26:39 +0000 (01:26 -0500)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Sun, 26 Mar 2017 10:13:20 +0000 (12:13 +0200)
commit5fa513cb07213608907d4daa123b81e5a32d13e0
tree53341de7af69ae3800ef45f0ad1258bc2fd0951a
parentd88b83e66bbf588a5d85168d9839501cd47fe561
ext4: fix fencepost in s_first_meta_bg validation

commit 2ba3e6e8afc9b6188b471f27cf2b5e3cf34e7af2 upstream.

It is OK for s_first_meta_bg to be equal to the number of block group
descriptor blocks.  (It rarely happens, but it shouldn't cause any
problems.)

https://bugzilla.kernel.org/show_bug.cgi?id=194567

Fixes: 3a4b77cd47bb837b8557595ec7425f281f2ca1fe
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
fs/ext4/super.c