diff options
| author | Xuan Zhuo <xuanzhuo@linux.alibaba.com> | 2022-08-04 09:32:48 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-08-25 12:45:16 +0300 |
| commit | 18e383afbd7047af7b055df6e25436e0ce28f8a5 (patch) | |
| tree | 4ee71648b7037362fad70836fd3b1903cf31ff5d | |
| parent | 3718ea043945ff8d16ab7c16a12893e1edb04e99 (diff) | |
| download | linux-18e383afbd7047af7b055df6e25436e0ce28f8a5.tar.xz | |
virtio_net: fix memory leak inside XPD_TX with mergeable
commit 7a542bee27c6a57e45c33cbbdc963325fd6493af upstream.
When we call xdp_convert_buff_to_frame() to get xdpf, if it returns
NULL, we should check if xdp_page was allocated by xdp_linearize_page().
If it is newly allocated, it should be freed here alone. Just like any
other "goto err_xdp".
Fixes: 44fa2dbd4759 ("xdp: transition into using xdp_frame for ndo_xdp_xmit")
Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/net/virtio_net.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index ec8e1b3108c3..3b3eebad3977 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -1057,8 +1057,11 @@ static struct sk_buff *receive_mergeable(struct net_device *dev, case XDP_TX: stats->xdp_tx++; xdpf = xdp_convert_buff_to_frame(&xdp); - if (unlikely(!xdpf)) + if (unlikely(!xdpf)) { + if (unlikely(xdp_page != page)) + put_page(xdp_page); goto err_xdp; + } err = virtnet_xdp_xmit(dev, 1, &xdpf, 0); if (unlikely(!err)) { xdp_return_frame_rx_napi(xdpf); |