Commit 04fb9124 authored Feb 13, 2020 by Per Forlin Committed by David S. Miller Feb 14, 2020

net: dsa: tag_qca: Make sure there is headroom for tag



Passing tag size to skb_cow_head will make sure
there is enough headroom for the tag data.
This change does not introduce any overhead in case there
is already available headroom for tag.

Signed-off-by: Per Forlin <perfn@axis.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 5fdcce21

net/dsa/tag_qca.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -33,7 +33,7 @@ static struct sk_buff qca_tag_xmit(struct sk_buff skb, struct net_device *dev)
		struct dsa_port *dp = dsa_slave_to_port(dev);
		u16 *phdr, hdr;

		if (skb_cow_head(skb, 0) < 0)
		if (skb_cow_head(skb, QCA_HDR_LEN) < 0)
		return NULL;

		skb_push(skb, QCA_HDR_LEN);

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