| From | Sasha Levin <> | Subject | [PATCH AUTOSEL for 4.14 066/100] virtio_net: fix return value check in receive_mergeable() | Date | Sun, 28 Jan 2018 22:26:42 +0000 |
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From: Yunjian Wang <wangyunjian@huawei.com>
[ Upstream commit 03e9f8a05bce7330bcd9c5cc54c8e42d0fcbf993 ]
The function virtqueue_get_buf_ctx() could return NULL, the return value 'buf' need to be checked with NULL, not value 'ctx'.
Signed-off-by: Yunjian Wang <wangyunjian@huawei.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> --- 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 511f8339fa96..7927e28f5336 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -714,7 +714,7 @@ static struct sk_buff *receive_mergeable(struct net_device *dev, int num_skb_frags; buf = virtqueue_get_buf_ctx(rq->vq, &len, &ctx); - if (unlikely(!ctx)) { + if (unlikely(!buf)) { pr_debug("%s: rx error: %d buffers out of %d missing\n", dev->name, num_buf, virtio16_to_cpu(vi->vdev, -- 2.11.0
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