From: Dmitry V. Levin <ldv@altlinux.org>
Date: Sat, 23 Jan 2016 22:46:40 +0000 (+0300)
Subject: unix_parse_response: add a safety check
X-Git-Tag: v4.12~613
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=3d0f55e41908a489f3d7e0cbe2c0d20de7e131c0;p=strace

unix_parse_response: add a safety check

* socketutils.c (unix_parse_response): Check that netlink message
is large enough to contain a unix_diag_msg structure.
---

diff --git a/socketutils.c b/socketutils.c
index 2f4a9b03..67fc1ee7 100644
--- a/socketutils.c
+++ b/socketutils.c
@@ -245,6 +245,8 @@ unix_parse_response(const char *proto_name, const void *data, int data_len,
 	size_t path_len = 0;
 	char path[UNIX_PATH_MAX + 1];
 
+	if (rta_len < 0)
+		return false;
 	if (diag_msg->udiag_ino != inode)
 		return false;
 	if (diag_msg->udiag_family != AF_UNIX)