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virtio-net: fix pages leaking when building skb in big mode

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We try to use build_skb() if we had sufficient tailroom. But we forget
to release the unused pages chained via private in big mode which will
leak pages. Fixing this by release the pages after building the skb in
big mode.

Cc: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Fixes: fb32856b16ad ("virtio-net: page_to_skb() use build_skb when there's sufficient tailroom")
Signed-off-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jason Wang 2021-09-17 16:34:06 +08:00 committed by David S. Miller
parent 3ede7f84c7
commit afd92d82c9
1 changed files with 4 additions and 0 deletions
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4
drivers/net/virtio_net.c
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@ -423,6 +423,10 @@ static struct sk_buff *page_to_skb(struct virtnet_info *vi,
skb_reserve(skb, p - buf);
skb_put(skb, len);
page = (struct page *)page->private;
if (page)
give_pages(rq, page);
goto ok;
}