From: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Date: Fri, 28 Jul 2006 09:12:09 +0000 (+0900)
Subject: [IPV6] ADDRCONF: Check payload length for IFA_LOCAL attribute in RTM_{ADD,DEL}MSG... 
X-Git-Tag: v2.6.18-rc4~65^2~31
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=643162258e57180a33e0ef7f08f0d986fbb5b4b9;p=linux-2.6

[IPV6] ADDRCONF: Check payload length for IFA_LOCAL attribute in RTM_{ADD,DEL}MSG message

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
---

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 2316a4315a..81702b9ba5 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -2853,7 +2853,8 @@ inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
 		pfx = RTA_DATA(rta[IFA_ADDRESS-1]);
 	}
 	if (rta[IFA_LOCAL-1]) {
-		if (pfx && memcmp(pfx, RTA_DATA(rta[IFA_LOCAL-1]), sizeof(*pfx)))
+		if (RTA_PAYLOAD(rta[IFA_LOCAL-1]) < sizeof(*pfx) ||
+		    (pfx && memcmp(pfx, RTA_DATA(rta[IFA_LOCAL-1]), sizeof(*pfx))))
 			return -EINVAL;
 		pfx = RTA_DATA(rta[IFA_LOCAL-1]);
 	}
@@ -2877,7 +2878,8 @@ inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
 		pfx = RTA_DATA(rta[IFA_ADDRESS-1]);
 	}
 	if (rta[IFA_LOCAL-1]) {
-		if (pfx && memcmp(pfx, RTA_DATA(rta[IFA_LOCAL-1]), sizeof(*pfx)))
+		if (RTA_PAYLOAD(rta[IFA_LOCAL-1]) < sizeof(*pfx) ||
+		    (pfx && memcmp(pfx, RTA_DATA(rta[IFA_LOCAL-1]), sizeof(*pfx))))
 			return -EINVAL;
 		pfx = RTA_DATA(rta[IFA_LOCAL-1]);
 	}