diff options
| author | Theodore Ts'o <tytso@mit.edu> | 2017-02-15 01:26:39 -0500 |
|---|---|---|
| committer | Amit Pundir <amit.pundir@linaro.org> | 2017-05-15 16:04:51 +0530 |
| commit | abfc28a6ad32ee57ec26b551cbd4d9d35ea5a48c (patch) | |
| tree | 89d3d41cdf4ff7fad3fb1e144f1fc033e9e14a52 | |
| parent | 7320f871d43558c8e6cff4d5baaa1ec822376ae0 (diff) | |
UPSTREAM: ext4: fix fencepost in s_first_meta_bg validation
(cherry-picked from commit 2ba3e6e8afc9b6188b471f27cf2b5e3cf34e7af2)
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: stable@vger.kernel.org
Change-Id: Ib414feb50f88dcd42dc846429b81df6c72b28136
| -rw-r--r-- | fs/ext4/super.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 2f6820ad3368..3e9db789527c 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -3959,7 +3959,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / EXT4_DESC_PER_BLOCK(sb); if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG)) { - 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)", |