From de6843be3082d416eaf2a00b72dad95c784ca980 Mon Sep 17 00:00:00 2001 From: Pablo Neira Ayuso Date: Tue, 6 Jun 2023 09:38:42 +0200 Subject: netfilter: nft_payload: rebuild vlan header when needed Skip rebuilding the vlan header when accessing destination and source mac address. Signed-off-by: Pablo Neira Ayuso --- net/netfilter/nft_payload.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'net/netfilter/nft_payload.c') diff --git a/net/netfilter/nft_payload.c b/net/netfilter/nft_payload.c index 3a3c7746e88f..8cb800989947 100644 --- a/net/netfilter/nft_payload.c +++ b/net/netfilter/nft_payload.c @@ -171,7 +171,8 @@ void nft_payload_eval(const struct nft_expr *expr, if (!skb_mac_header_was_set(skb)) goto err; - if (skb_vlan_tag_present(skb)) { + if (skb_vlan_tag_present(skb) && + priv->offset >= offsetof(struct ethhdr, h_proto)) { if (!nft_payload_copy_vlan(dest, skb, priv->offset, priv->len)) goto err; -- cgit