From 07ce01517c27566fd1eab9b941b1547bb553ff7e Mon Sep 17 00:00:00 2001
From: Matthias Schiffer <mschiffer@universe-factory.net>
Date: Mon, 4 Aug 2014 22:57:26 +0200
Subject: [PATCH] gluon-radvd: fix NULL deref
The specification says that the ifa_addr field of struct ifaddrs may be NULL,
and in Barrier Breaker, this does actually occur...
---
package/gluon-radvd/src/gluon-radvd.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/package/gluon-radvd/src/gluon-radvd.c b/package/gluon-radvd/src/gluon-radvd.c
index 801d98542..bd57eabcf 100644
--- a/package/gluon-radvd/src/gluon-radvd.c
+++ b/package/gluon-radvd/src/gluon-radvd.c
@@ -266,7 +266,7 @@ static void update_interface(void) {
memset(&G.iface.ifaddr, 0, sizeof(G.iface.ifaddr));
for (addr = addrs; addr; addr = addr->ifa_next) {
- if (addr->ifa_addr->sa_family != AF_INET6)
+ if (!addr->ifa_addr || addr->ifa_addr->sa_family != AF_INET6)
continue;
const struct sockaddr_in6 *in6 = (const struct sockaddr_in6 *)addr->ifa_addr;
--
GitLab