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(parent: d8316f3) | patch
vhost: validate vhost_get_vq_desc return value
authorMichael S. Tsirkin <mst@redhat.com>
Thu, 27 Mar 2014 10:53:37 +0000 (12:53 +0200)
committerDavid S. Miller <davem@davemloft.net>
Fri, 28 Mar 2014 20:10:35 +0000 (16:10 -0400)
commita39ee449f96a2cd44ce056d8a0a112211a9b1a1f
tree0a28633b16e59b3ce6211daf4f34466ad0129430tree | snapshot
parentd8316f3991d207fe32881a9ac20241be8fa2bad0commit | diff
vhost: validate vhost_get_vq_desc return value

vhost fails to validate negative error code
from vhost_get_vq_desc causing
a crash: we are using -EFAULT which is 0xfffffff2
as vector size, which exceeds the allocated size.

The code in question was introduced in commit
8dd014adfea6f173c1ef6378f7e5e7924866c923
    vhost-net: mergeable buffers support

CVE-2014-0055

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/vhost/net.c diff | blob | history
Andy's Linux Kernel repo