From afd92d82c9d715fb97565408755acad81573591a Mon Sep 17 00:00:00 2001 From: Jason Wang Date: Fri, 17 Sep 2021 16:34:06 +0800 Subject: [PATCH] virtio-net: fix pages leaking when building skb in big mode 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 Fixes: fb32856b16ad ("virtio-net: page_to_skb() use build_skb when there's sufficient tailroom") Signed-off-by: Jason Wang Reviewed-by: Xuan Zhuo Signed-off-by: David S. Miller --- drivers/net/virtio_net.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index 271d38c..79bd258 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -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; } -- 2.7.4