@@ -341,7 +341,7 @@ static struct sk_buff *receive_mergeable(struct net_device *dev,
if (i >= MAX_SKB_FRAGS) {
pr_debug("%s: packet too long\n", skb->dev->name);
skb->dev->stats.rx_length_errors++;
- return NULL;
+ goto err_frags;
}
page = virtqueue_get_buf(rq->vq, &len);
if (!page) {
@@ -362,6 +362,7 @@ static struct sk_buff *receive_mergeable(struct net_device *dev,
err_skb:
give_pages(rq, page);
while (--num_buf) {
+err_frags:
buf = virtqueue_get_buf(rq->vq, &len);
if (unlikely(!buf)) {
pr_debug("%s: rx error: %d buffers missing\n",
This is a note to let you know that I have just added a patch titled virtio_net: don't leak memory or block when too many frags to the linux-3.8.y-queue branch of the 3.8.y.z extended stable tree which can be found at: http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.8.y-queue This patch is scheduled to be released in version 3.8.13.16. If you, or anyone else, feels it should not be added to this tree, please reply to this email. For more information about the 3.8.y.z tree, see https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable Thanks. -Kamal ------ From 0201e89b50c9c7ca6f8d9b7c1d5dd9da50aea319 Mon Sep 17 00:00:00 2001 From: "Michael S. Tsirkin" <mst@redhat.com> Date: Thu, 26 Dec 2013 15:32:55 +0200 Subject: virtio_net: don't leak memory or block when too many frags We leak an skb when there are too many frags, we also stop processing the packet in the middle, the result is almost sure to be loss of networking. Reported-by: Michael Dalton <mwdalton@google.com> Acked-by: Michael Dalton <mwdalton@google.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Kamal Mostafa <kamal@canonical.com> --- drivers/net/virtio_net.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) -- 1.8.3.2