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 <[email protected]> --- I sent this before on 13 Apr 2013 and a reminder on 31 May 2013 so now I'm going to try sneak it in through the akpm tree. diff --git a/drivers/char/agp/frontend.c b/drivers/char/agp/frontend.c index 8121b4c..b297033 100644 --- a/drivers/char/agp/frontend.c +++ b/drivers/char/agp/frontend.c @@ -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 | -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
