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-rw-r--r--net/mpls/af_mpls.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/net/mpls/af_mpls.c b/net/mpls/af_mpls.c
index 20cf48a..4f265c6 100644
--- a/net/mpls/af_mpls.c
+++ b/net/mpls/af_mpls.c
@@ -586,8 +586,11 @@ static int rtm_to_route_config(struct sk_buff *skb, struct nlmsghdr *nlh,
case RTA_VIA:
{
struct rtvia *via = nla_data(nla);
+ if (nla_len(nla) < offsetof(struct rtvia, rtvia_addr))
+ goto errout;
cfg->rc_via_family = via->rtvia_family;
- cfg->rc_via_alen = nla_len(nla) - 2;
+ cfg->rc_via_alen = nla_len(nla) -
+ offsetof(struct rtvia, rtvia_addr);
if (cfg->rc_via_alen > MAX_VIA_ALEN)
goto errout;