From 030f585c4e15013b84fdcbb5feb2777570a7923b Mon Sep 17 00:00:00 2001
From: Tom Marshall <tdm.code@gmail.com>
Date: Thu, 18 May 2017 23:50:22 +0000
Subject: [PATCH] kernel: Fix potential refcount leak in su check

Change-Id: I8d2c8bed65a01eb0928308df638a04449a5bd881
---
 fs/namei.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/fs/namei.c b/fs/namei.c
index 94e792fa5e6b..dbc6fe875db7 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2168,8 +2168,10 @@ static int path_lookupat(struct nameidata *nd, unsigned flags, struct path *path
 	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;
+			}
 		}
 	}