Messages in this thread Patch in this message | | | Date | Thu, 7 Jun 2018 20:10:01 +0300 | From | "Michael S. Tsirkin" <> | Subject | Re: KMSAN: uninit-value in _copy_to_iter (2) |
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#syz test: https://github.com/google/kmsan.git master
Subject: vhost: fix info leak
Fixes: CVE-2018-1118 Signed-off-by: Michael S. Tsirkin <mst@redhat.com> --- diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c index f0be5f35ab28..9beefa6ed1ce 100644 --- a/drivers/vhost/vhost.c +++ b/drivers/vhost/vhost.c @@ -2345,6 +2345,9 @@ struct vhost_msg_node *vhost_new_msg(struct vhost_virtqueue *vq, int type) struct vhost_msg_node *node = kmalloc(sizeof *node, GFP_KERNEL); if (!node) return NULL; + + /* Make sure all padding within the structure is initialized. */ + memset(&node->msg, 0, sizeof node->msg); node->vq = vq; node->msg.type = type; return node;
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