diff options
Diffstat (limited to 'net/ipv4/ip_gre.c')
| -rw-r--r-- | net/ipv4/ip_gre.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c index 900ee28bda99..63f7bacf628a 100644 --- a/net/ipv4/ip_gre.c +++ b/net/ipv4/ip_gre.c @@ -502,6 +502,10 @@ static void __gre_xmit(struct sk_buff *skb, struct net_device *dev, static struct sk_buff *gre_handle_offloads(struct sk_buff *skb, bool csum) { + unsigned char *skb_checksum_start = skb->head + skb->csum_start; + + if (csum && skb_checksum_start < skb->data) + return ERR_PTR(-EINVAL); return iptunnel_handle_offloads(skb, csum, csum ? SKB_GSO_GRE_CSUM : SKB_GSO_GRE); } |