Commit efd35c26 authored by Jakub Sitnicki's avatar Jakub Sitnicki Committed by Martin KaFai Lau
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bpf: Make bpf_skb_vlan_pop helper metadata-safe 



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

Signed-off-by: default avatarJakub Sitnicki <jakub@cloudflare.com>
Signed-off-by: default avatarMartin KaFai Lau <martin.lau@kernel.org>
Link: https://patch.msgid.link/20251105-skb-meta-rx-path-v4-5-5ceb08a9b37b@cloudflare.com
parent b85be58e

include/linux/if_vlan.h

+1 −1
Original line number Diff line number Diff line
@@ -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);

}



/**