| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.5 004/399] net: dsa: tag_qca: Make sure there is headroom for tag | Date | Fri, 21 Feb 2020 08:35:29 +0100 |
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From: Per Forlin <per.forlin@axis.com>
[ Upstream commit 04fb91243a853dbde216d829c79d9632e52aa8d9 ]
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> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- net/dsa/tag_qca.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/net/dsa/tag_qca.c +++ b/net/dsa/tag_qca.c @@ -33,7 +33,7 @@ static struct sk_buff *qca_tag_xmit(stru 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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