From: Dmitry V. Levin <ldv@altlinux.org>
Date: Thu, 28 Jan 2016 23:46:56 +0000 (+0000)
Subject: inet_parse_response: add a safety check
X-Git-Tag: v4.12~608
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=cc09ba1a8406d4765979a679520c4c164b814a13;p=strace

inet_parse_response: add a safety check

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

diff --git a/socketutils.c b/socketutils.c
index 62253044..aa821639 100644
--- a/socketutils.c
+++ b/socketutils.c
@@ -95,6 +95,8 @@ inet_parse_response(const char *proto_name, const void *data, int data_len,
 	static const char zero_addr[sizeof(struct in6_addr)];
 	socklen_t addr_size, text_size;
 
+	if (data_len < (int) NLMSG_LENGTH(sizeof(*diag_msg)))
+		return false;
 	if (diag_msg->idiag_inode != inode)
 		return false;