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bpf: Make bpf_skb_vlan_pop helper metadata-safe

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Use the metadata-aware helper to move packet bytes after skb_pull(),
ensuring metadata remains valid after calling the BPF helper.

Signed-off-by: Jakub Sitnicki <jakub@cloudflare.com>
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Link: https://patch.msgid.link/20251105-skb-meta-rx-path-v4-5-5ceb08a9b37b@cloudflare.com
This commit is contained in:
Jakub Sitnicki
2025-11-05 21:19:42 +01:00
committed by Martin KaFai Lau
parent b85be58e2f
commit efd35c2623
1 changed files with 1 additions and 1 deletions
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2
include/linux/if_vlan.h
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@@ -738,9 +738,9 @@ static inline void vlan_remove_tag(struct sk_buff *skb, u16 *vlan_tci)
*vlan_tci = ntohs(vhdr->h_vlan_TCI);
memmove(skb->data + VLAN_HLEN, skb->data, 2 * ETH_ALEN);
vlan_set_encap_proto(skb, vhdr);
__skb_pull(skb, VLAN_HLEN);
skb_postpull_data_move(skb, VLAN_HLEN, 2 * ETH_ALEN);
}
/**