From adb130d10aefc4ace7e2db13891fcdc941fc7670 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Thu, 29 Nov 2012 22:17:21 -0500
Subject: [PATCH] --- yaml --- r: 336176 b: refs/heads/master c:
 21d8a15ac333b05f1fecdf9fdc30996be2e11d60 h: refs/heads/master v: v3

---
 [refs]           | 2 +-
 trunk/fs/namei.c | 5 +++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index efa252a921f3..f3c7343d7efe 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 0903a0c8491c1e987dfc6eb294199a36760398bc
+refs/heads/master: 21d8a15ac333b05f1fecdf9fdc30996be2e11d60
diff --git a/trunk/fs/namei.c b/trunk/fs/namei.c
index 937f9d50c84b..5f4cdf3ad913 100644
--- a/trunk/fs/namei.c
+++ b/trunk/fs/namei.c
@@ -2131,6 +2131,11 @@ struct dentry *lookup_one_len(const char *name, struct dentry *base, int len)
 	if (!len)
 		return ERR_PTR(-EACCES);
 
+	if (unlikely(name[0] == '.')) {
+		if (len < 2 || (len == 2 && name[1] == '.'))
+			return ERR_PTR(-EACCES);
+	}
+
 	while (len--) {
 		c = *(const unsigned char *)name++;
 		if (c == '/' || c == '\0')