From: Jason Wang <jasowang@redhat.com>
Date: Wed, 2 May 2012 03:42:23 +0000 (+0800)
Subject: vhost_net: zerocopy: fix possible NULL pointer dereference of vq->bufs
X-Git-Tag: v3.5-rc1~109^2~146^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c460f0573941cb28dc7f35595679c3508f0ce41f;p=pandora-kernel.git

vhost_net: zerocopy: fix possible NULL pointer dereference of vq->bufs

When we want to disable vhost_net backend while there's a tx work, a possible
NULL pointer defernece may happen we we try to deference the vq->bufs after
vhost_net_set_backend() assign a NULL to it.

As suggested by Michael, fix this by checking the vq->bufs instead of
vhost_sock_zcopy().

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---

Reading git-diff-tree failed