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virtio_net: free xdp shinfo frags when build_skb_from_xdp_buff() fails

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build_skb_from_xdp_buff() may return NULL, in this case
we need to free the frags of xdp shinfo.

Fixes: fab89bafa9 ("virtio-net: support multi-buffer xdp")
Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Xuan Zhuo 2023-03-15 09:52:23 +08:00 committed by David S. Miller
parent fa0f1ba7c8
commit 1a3bd6eaba
1 changed files with 4 additions and 1 deletions
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5
drivers/net/virtio_net.c
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@ -1273,9 +1273,12 @@ static struct sk_buff *receive_mergeable(struct net_device *dev,
switch (act) {
case XDP_PASS:
head_skb = build_skb_from_xdp_buff(dev, vi, &xdp, xdp_frags_truesz);
if (unlikely(!head_skb))
goto err_xdp_frags;
if (unlikely(xdp_page != page))
put_page(page);
head_skb = build_skb_from_xdp_buff(dev, vi, &xdp, xdp_frags_truesz);
rcu_read_unlock();
return head_skb;
case XDP_TX: