From 32412565c27d63e15f25e76d86ee04c29b201b96 Mon Sep 17 00:00:00 2001 From: Felix Fietkau Date: Mon, 19 Aug 2024 15:20:42 +0200 Subject: [PATCH] udp: fix receiving fraglist GSO packets When assembling fraglist GSO packets, udp4_gro_complete does not set skb->csum_start, which makes the extra validation in __udp_gso_segment fail. Fixes: 89add40066f9 ("net: drop bad gso csum_start and offset in virtio_net_hdr") Signed-off-by: Felix Fietkau --- net/ipv4/udp_offload.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/net/ipv4/udp_offload.c +++ b/net/ipv4/udp_offload.c @@ -279,7 +279,8 @@ struct sk_buff *__udp_gso_segment(struct return ERR_PTR(-EINVAL); if (unlikely(skb_checksum_start(gso_skb) != - skb_transport_header(gso_skb))) + skb_transport_header(gso_skb) && + !(skb_shinfo(gso_skb)->gso_type & SKB_GSO_FRAGLIST))) return ERR_PTR(-EINVAL); /* We don't know if egress device can segment and checksum the packet