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    Subject[patch 38/58] agp: zero pages before sending to userspace
    2.6.27-stable review patch.  If anyone has any objections, please let us know.

    ------------------

    upstream commit: 59de2bebabc5027f93df999d59cc65df591c3e6e

    CVE-2009-1192

    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.

    Signed-off-by: Shaohua Li <shaohua.li@intel.com>
    Signed-off-by: Dave Airlie <airlied@redhat.com>
    Signed-off-by: Chris Wright <chrisw@sous-sol.org>
    Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
    ---
    drivers/char/agp/generic.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    --- a/drivers/char/agp/generic.c
    +++ b/drivers/char/agp/generic.c
    @@ -1207,7 +1207,7 @@ void *agp_generic_alloc_page(struct agp_
    {
    struct page * page;

    - page = alloc_page(GFP_KERNEL | GFP_DMA32);
    + page = alloc_page(GFP_KERNEL | GFP_DMA32 | __GFP_ZERO);
    if (page == NULL)
    return NULL;




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