--- linux-stage.orig/fs/ext4/mmp.c	2015-10-06 08:21:12.013939184 +0530
+++ linux-stage/fs/ext4/mmp.c	2015-10-06 08:20:35.242939292 +0530
@@ -99,6 +99,8 @@ static int read_mmp_block(struct super_b
		return 0;

 warn_exit:
+	brelse(*bh);
+	*bh = NULL;
	ext4_warning(sb, "Error %d while reading MMP block %llu",
		     ret, mmp_block);
	return ret;
@@ -219,6 +221,7 @@ static int kmmpd(void *data)
 					     "The filesystem seems to have been"
 					     " multiply mounted.");
 				ext4_error(sb, "abort");
+				put_bh(bh_check);
 				goto failed;
 			}
 			put_bh(bh_check);