CVE-2009-1192 kernel: agp: zero pages before sending to userspace

[Eugene Teo <eugene () redhat com>]

"AGP pages might be mapped into userspace finally, so the pages should
be set to zero before userspace can use it. Otherwise there is potential
information leakage."

http://git.kernel.org/linus/59de2bebabc5027f93df999d59cc65df591c3e6e
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2009-1192

Thanks, Eugene
-- 
Eugene Teo / Red Hat Security Response Team