diff options
| -rw-r--r-- | net/ipv4/fou.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/net/ipv4/fou.c b/net/ipv4/fou.c index 0d0ad19ecb87..0c9f171fb085 100644 --- a/net/ipv4/fou.c +++ b/net/ipv4/fou.c @@ -1061,6 +1061,13 @@ static int gue_err(struct sk_buff *skb, u32 info) if (validate_gue_flags(guehdr, optlen)) return -EINVAL; + /* Handling exceptions for direct UDP encapsulation in GUE would lead to + * recursion. Besides, this kind of encapsulation can't even be + * configured currently. Discard this. + */ + if (guehdr->proto_ctype == IPPROTO_UDP) + return -EOPNOTSUPP; + skb_set_transport_header(skb, -(int)sizeof(struct icmphdr)); ret = gue_err_proto_handler(guehdr->proto_ctype, skb, info); |