From d7037dc85112e92298f47aa11368387f3daa1d07 Mon Sep 17 00:00:00 2001 From: Felix Fietkau Date: Mon, 19 Aug 2024 17:06:21 +0200 Subject: [PATCH] udp: fix receiving fraglist GSO packets commit b128ed5ab27330deeeaf51ea8bb69f1442a96f7f upstream. 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 Reviewed-by: Willem de Bruijn Link: https://patch.msgid.link/20240819150621.59833-1-nbd@nbd.name Signed-off-by: Jakub Kicinski Signed-off-by: Greg Kroah-Hartman --- net/ipv4/udp_offload.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/net/ipv4/udp_offload.c b/net/ipv4/udp_offload.c index 28c451ae2119a..19a413aad0636 100644 --- a/net/ipv4/udp_offload.c +++ b/net/ipv4/udp_offload.c @@ -277,7 +277,8 @@ struct sk_buff *__udp_gso_segment(struct sk_buff *gso_skb, 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); if (skb_gso_ok(gso_skb, features | NETIF_F_GSO_ROBUST)) { -- 2.47.3