From 31c1e078e3caa5812240e6f9b93ffc43eff3c717 Mon Sep 17 00:00:00 2001 From: Jason Wang Date: Tue, 22 May 2018 11:44:29 +0800 Subject: [PATCH] virtio-net: correctly transmit XDP buff after linearizing [ Upstream commit 5d458a13dd59d04b4d6658a6d5b94d42732b15ae ] We should not go for the error path after successfully transmitting a XDP buffer after linearizing. Since the error path may try to pop and drop next packet and increase the drop counters. Fixing this by simply drop the refcnt of original page and go for xmit path. Fixes: 72979a6c3590 ("virtio_net: xdp, add slowpath case for non contiguous buffers") Cc: John Fastabend Acked-by: Michael S. Tsirkin Signed-off-by: Jason Wang Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- drivers/net/virtio_net.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index 948611317c97..925d15ea35cb 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -688,7 +688,7 @@ static struct sk_buff *receive_mergeable(struct net_device *dev, trace_xdp_exception(vi->dev, xdp_prog, act); ewma_pkt_len_add(&rq->mrg_avg_pkt_len, len); if (unlikely(xdp_page != page)) - goto err_xdp; + put_page(page); rcu_read_unlock(); goto xdp_xmit; default: -- 2.20.1