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geneve: fix length used in GRO hint UDP checksum adjustment

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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: fd0dd79657 ("geneve: use GRO hint option in the RX path")
Cc: Paolo Abeni <pabeni@redhat.com>
Reported-by: Sashiko <sashiko-bot@kernel.org>
Closes: https://sashiko.dev/#/patchset/20260521131436.748832-1-jhs%40mojatatu.com
Signed-off-by: Antoine Tenart <atenart@kernel.org>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20260529144713.780938-1-atenart@kernel.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Antoine Tenart
2026-06-04 10:48:46 +02:00
committed by Paolo Abeni
parent 060c1daac7
commit 1231623fd3
1 changed files with 1 additions and 1 deletions
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drivers/net/geneve.c
+1 -1
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@@ -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,