1 files changed, 5 insertions, 0 deletions

diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c
index 4e5eac301f91..2aa294be0c79 100644
--- a/net/ipv6/ipv6_sockglue.c
+++ b/net/ipv6/ipv6_sockglue.c
@@ -366,11 +366,16 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
                 }
 
                 /* routing header option needs extra check */
+                retv = -EINVAL;
                 if (optname == IPV6_RTHDR && opt && opt->srcrt) {
                         struct ipv6_rt_hdr *rthdr = opt->srcrt;
                         switch (rthdr->type) {
 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
                         case IPV6_SRCRT_TYPE_2:
+                                if (rthdr->hdrlen != 2 ||
+                                    rthdr->segments_left != 1)
+                                        goto sticky_done;
+
                                 break;
 #endif
                         default: