ext2: Fix memory leak in ext2_fill_super() in case of a failed mount

Signed-off-by: Manish Katiyar <mkatiyar@gmail.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
diff --git a/fs/ext2/super.c b/fs/ext2/super.c
index 5c4afe6..e3c748f 100644
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -1093,6 +1093,7 @@
 	brelse(bh);
 failed_sbi:
 	sb->s_fs_info = NULL;
+	kfree(sbi->s_blockgroup_lock);
 	kfree(sbi);
 	return ret;
 }