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| author | Xuan Zhuo <xuanzhuo@linux.alibaba.com> | 2022-08-04 14:32:48 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2022-08-08 09:43:55 +0100 |
| commit | 7a542bee27c6a57e45c33cbbdc963325fd6493af (patch) | |
| tree | b3d733773dfec1008381c01806ff91c8ff04eb48 /drivers | |
| parent | ac0dbed9ba4c38ed9b5fd3a43ee4bc1f48901a34 (diff) | |
| download | linux-7a542bee27c6a57e45c33cbbdc963325fd6493af.tar.gz linux-7a542bee27c6a57e45c33cbbdc963325fd6493af.tar.bz2 linux-7a542bee27c6a57e45c33cbbdc963325fd6493af.zip | |
virtio_net: fix memory leak inside XPD_TX with mergeable
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>
Diffstat (limited to 'drivers')
| -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); |