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-rw-r--r--net/ipv6/ndisc.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index 6a9f616de37..39bb658f3c4 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -1413,6 +1413,13 @@ void ndisc_send_redirect(struct sk_buff *skb, struct neighbour *neigh,
return;
}
+ if (!ipv6_addr_equal(&skb->nh.ipv6h->daddr, target) &&
+ !(ipv6_addr_type(target) & IPV6_ADDR_LINKLOCAL)) {
+ ND_PRINTK2(KERN_WARNING
+ "ICMPv6 Redirect: target address is not link-local.\n");
+ return;
+ }
+
ndisc_flow_init(&fl, NDISC_REDIRECT, &saddr_buf, &skb->nh.ipv6h->saddr,
dev->ifindex);