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authorMichael S. Tsirkin <mst@redhat.com>2018-05-12 00:33:10 +0300
committerMichael S. Tsirkin <mst@redhat.com>2018-06-12 04:59:29 +0300
commit670ae9caaca467ea1bfd325cb2a5c98ba87f94ad (patch)
treefa217f1338634e7f9d0955193d66445cd78740a6 /drivers/virtio
parent55e49dc43a835b19567e62142cb1c87dc7db7b3c (diff)
downloadlinux-670ae9caaca467ea1bfd325cb2a5c98ba87f94ad.tar.bz2
vhost: fix info leak due to uninitialized memory
struct vhost_msg within struct vhost_msg_node is copied to userspace. Unfortunately it turns out on 64 bit systems vhost_msg has padding after type which gcc doesn't initialize, leaking 4 uninitialized bytes to userspace. This padding also unfortunately means 32 bit users of this interface are broken on a 64 bit kernel which will need to be fixed separately. Fixes: CVE-2018-1118 Cc: stable@vger.kernel.org Reported-by: Kevin Easton <kevin@guarana.org> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reported-by: syzbot+87cfa083e727a224754b@syzkaller.appspotmail.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'drivers/virtio')
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