Index: linux-stage/fs/ext4/super.c
===================================================================
--- linux-stage.orig/fs/ext4/super.c
+++ linux-stage/fs/ext4/super.c
@@ -3427,7 +3427,6 @@ failed_mount:
 	brelse(bh);
 out_fail:
 	sb->s_fs_info = NULL;
-	kfree(&sbi->s_blockgroup_lock);
 	kfree(sbi);
 	lock_kernel();
 	return ret;