net: erspan: fix wrong return value

If pskb_may_pull return failed, return PACKET_REJECT
instead of -ENOMEM.

Fixes: 94d7d8f29287 ("ip6_gre: add erspan v2 support")
Fixes: f551c91de262 ("net: erspan: introduce erspan v2 for ip_gre")
Signed-off-by: William Tu <u9012063@gmail.com>
Cc: Haishuang Yan <yanhaishuang@cmss.chinamobile.com>
Acked-by: Haishuang Yan <yanhaishuang@cmss.chinamobile.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 2 insertions, 2 deletions

diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c
index 9a80d84fc182..b3a32a980240 100644
--- a/net/ipv4/ip_gre.c
+++ b/net/ipv4/ip_gre.c
@@ -287,7 +287,7 @@ static int erspan_rcv(struct sk_buff *skb, struct tnl_ptk_info *tpi,
         if (tunnel) {
                 len = gre_hdr_len + erspan_hdr_len(ver);
                 if (unlikely(!pskb_may_pull(skb, len)))
-                        return -ENOMEM;
+                        return PACKET_REJECT;
 
                 if (__iptunnel_pull_header(skb,
                                            len,
diff --git a/net/ipv6/ip6_gre.c b/net/ipv6/ip6_gre.c
index 5c9c65f1d5c2..b3e4e0384f36 100644
--- a/net/ipv6/ip6_gre.c
+++ b/net/ipv6/ip6_gre.c
@@ -524,7 +524,7 @@ static int ip6erspan_rcv(struct sk_buff *skb, int gre_hdr_len,
                 int len = erspan_hdr_len(ver);
 
                 if (unlikely(!pskb_may_pull(skb, len)))
-                        return -ENOMEM;
+                        return PACKET_REJECT;
 
                 if (__iptunnel_pull_header(skb, len,
                                            htons(ETH_P_TEB),