From: Antoine Tenart Date: Fri, 29 May 2026 14:47:00 +0000 (+0200) Subject: geneve: fix length used in GRO hint UDP checksum adjustment X-Git-Url: http://git.ipfire.org/gitweb/index.cgi?a=commitdiff_plain;h=1231623fd3b5aa6b41cce799ffb0d82e10914be4;p=thirdparty%2Fkernel%2Flinux.git geneve: fix length used in GRO hint UDP checksum adjustment In geneve_post_decap_hint the length used for adjusting the UDP checksum should be 'skb->len - gro_hint->nested_tp_offset' (UDP length) instead of 'skb->len - gro_hint->nested_nh_offset' (IP length). Fixes: fd0dd796576e ("geneve: use GRO hint option in the RX path") Cc: Paolo Abeni Reported-by: Sashiko Closes: https://sashiko.dev/#/patchset/20260521131436.748832-1-jhs%40mojatatu.com Signed-off-by: Antoine Tenart Reviewed-by: Simon Horman Link: https://patch.msgid.link/20260529144713.780938-1-atenart@kernel.org Signed-off-by: Paolo Abeni --- diff --git a/drivers/net/geneve.c b/drivers/net/geneve.c index c6563367d382..715180c3a1b3 100644 --- a/drivers/net/geneve.c +++ b/drivers/net/geneve.c @@ -632,7 +632,7 @@ static int geneve_post_decap_hint(const struct sock *sk, struct sk_buff *skb, uh = udp_hdr(skb); uh->len = htons(skb->len - gro_hint->nested_tp_offset); if (uh->check) { - len = skb->len - gro_hint->nested_nh_offset; + len = skb->len - gro_hint->nested_tp_offset; skb_shinfo(skb)->gso_type |= SKB_GSO_UDP_TUNNEL_CSUM; if (gro_hint->nested_is_v6) uh->check = ~udp_v6_check(len, &ipv6h->saddr,