Commit 3cf0b031 authored May 03, 2014 by Dan Carpenter Committed by Dave Airlie May 05, 2014

agp: info leak in agpioc_info_wrap()



On 64 bit systems the agp_info struct has a 4 byte hole between
->agp_mode and ->aper_base.  We need to clear it to avoid disclosing
stack information to userspace.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

parent 0384dcae

drivers/char/agp/frontend.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -730,6 +730,7 @@ static int agpioc_info_wrap(struct agp_file_private priv, void __user arg)

		agp_copy_info(agp_bridge, &kerninfo);

		memset(&userinfo, 0, sizeof(userinfo));
		userinfo.version.major = kerninfo.version.major;
		userinfo.version.minor = kerninfo.version.minor;
		userinfo.bridge_id = kerninfo.device->vendor \|