From fd494b5a4da5dc2e332b8b7480960509046c7b2e Mon Sep 17 00:00:00 2001
From: Tom Marshall <tdm.code@gmail.com>
Date: Fri, 19 May 2017 18:24:04 +0000
Subject: [PATCH] kernel: Fix potential refcount leak in su check

Change-Id: I7e1ecb78bfc951bf645a1462988dcd93c4247a9b
---

diff --git a/fs/namei.c b/fs/namei.c
index a52456c..404b61c 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2003,8 +2003,10 @@
 	if (!err) {
 		struct super_block *sb = nd->inode->i_sb;
 		if (sb->s_flags & MS_RDONLY) {
-			if (d_is_su(nd->path.dentry) && !su_visible())
+			if (d_is_su(nd->path.dentry) && !su_visible()) {
+				path_put(&nd->path);
 				err = -ENOENT;
+			}
 		}
 	}