virtio-net: drop NETIF_F_FRAGLIST

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commit 48900cb6af upstream.

virtio declares support for NETIF_F_FRAGLIST, but assumes
that there are at most MAX_SKB_FRAGS + 2 fragments which isn't
always true with a fraglist.

A longer fraglist in the skb will make the call to skb_to_sgvec overflow
the sg array, leading to memory corruption.

Drop NETIF_F_FRAGLIST so we only get what we can handle.

Cc: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Cc: Moritz Muehlenhoff <jmm@debian.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>

...

This commit is contained in:

Jason Wang 2015-08-05 10:34:04 +08:00 • committed by Luis Henriques

parent fd0ad1be8d

commit 319e98c7b0

1 changed files with 2 additions and 2 deletions

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drivers/net/virtio_net.c

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