userspace: Correct IPv6 header in software-GSO.

Correct the length field in IPv6 packets when applying software fallback GSO. Previosuly the field retained an IPv4 header size, which was incorrect. Fixes: 8b5fe2d ("userspace: Add Generic Segmentation Offloading.") Acked-by: Simon Horman <[email protected]> Signed-off-by: Mike Pattrick <[email protected]> Signed-off-by: Ilya Maximets <[email protected]>
roidayan · Jan 17, 2024 · 76e2f20 · 76e2f20
1 parent 9e3c842
commit 76e2f20
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/lib/dp-packet-gso.c b/lib/dp-packet-gso.c
@@ -142,7 +142,7 @@ dp_packet_gso(struct dp_packet *p, struct dp_packet_batch **batches)
             struct ovs_16aligned_ip6_hdr *ip6_hdr = dp_packet_l3(seg);
 
             ip6_hdr->ip6_ctlun.ip6_un1.ip6_un1_plen
-                = htons(sizeof *ip_hdr + dp_packet_l4_size(seg));
+                = htons(dp_packet_l3_size(seg) - sizeof *ip6_hdr);
         }
 
         /* Update L4 header. */