Patch "ext4: fix fencepost in s_first_meta_bg validation" has been added to the 4.10-stable tree

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This is a note to let you know that I've just added the patch titled

    ext4: fix fencepost in s_first_meta_bg validation

to the 4.10-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     ext4-fix-fencepost-in-s_first_meta_bg-validation.patch
and it can be found in the queue-4.10 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.


>From 2ba3e6e8afc9b6188b471f27cf2b5e3cf34e7af2 Mon Sep 17 00:00:00 2001
From: Theodore Ts'o <tytso@xxxxxxx>
Date: Wed, 15 Feb 2017 01:26:39 -0500
Subject: ext4: fix fencepost in s_first_meta_bg validation

From: Theodore Ts'o <tytso@xxxxxxx>

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@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 fs/ext4/super.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -3844,7 +3844,7 @@ static int ext4_fill_super(struct super_
 	db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) /
 		   EXT4_DESC_PER_BLOCK(sb);
 	if (ext4_has_feature_meta_bg(sb)) {
-		if (le32_to_cpu(es->s_first_meta_bg) >= db_count) {
+		if (le32_to_cpu(es->s_first_meta_bg) > db_count) {
 			ext4_msg(sb, KERN_WARNING,
 				 "first meta block group too large: %u "
 				 "(group descriptor block count %u)",


Patches currently in stable-queue which might be from tytso@xxxxxxx are

queue-4.10/ext4-fix-data-corruption-in-data-journal-mode.patch
queue-4.10/ext4-fix-use-after-iput-when-fscrypt-contexts-are-inconsistent.patch
queue-4.10/ext4-return-erofs-if-device-is-r-o-and-journal-replay-is-needed.patch
queue-4.10/ext4-include-forgotten-start-block-on-fallocate-insert-range.patch
queue-4.10/ext4-preserve-the-needs_recovery-flag-when-the-journal-is-aborted.patch
queue-4.10/ext4-fix-deadlock-between-inline_data-and-ext4_expand_extra_isize_ea.patch
queue-4.10/ext4-trim-allocation-requests-to-group-size.patch
queue-4.10/ext4-do-not-polute-the-extents-cache-while-shifting-extents.patch
queue-4.10/ext4-fix-fencepost-in-s_first_meta_bg-validation.patch
queue-4.10/ext4-fix-inline-data-error-paths.patch
queue-4.10/jbd2-don-t-leak-modified-metadata-buffers-on-an-aborted-journal.patch



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