From 1ead3d79f7c749403794df87e65a8d0e78a6e599 Mon Sep 17 00:00:00 2001
From: Cyrill Gorcunov <gorcunov@openvz.org>
Date: Tue, 7 May 2013 19:01:22 +0400
Subject: [PATCH] util: Check for overflow in read_fd_link

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
---
 util.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/util.c b/util.c
index ee87cc815..e36ab7e75 100644
--- a/util.c
+++ b/util.c
@@ -430,6 +430,9 @@ int read_fd_link(int lfd, char *buf, size_t size)
 	if (ret < 0) {
 		pr_perror("Can't read link of fd %d", lfd);
 		return -1;
+	} else if ((size_t)ret == size) {
+		pr_err("Buffer for read link of fd %d is too small\n", lfd);
+		return -1;
 	}
 	buf[ret] = 0;