xserver: Branch 'master'

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 dix/pixmap.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

New commits:
commit aac28e162e5108510065ad4c323affd6deffd816
Author: Matthieu Herrb <matthieu at herrb.eu>
Date:   Sat Jul 25 19:33:50 2020 +0200

    fix for ZDI-11426
    
    Avoid leaking un-initalized memory to clients by zeroing the
    whole pixmap on initial allocation.
    
    This vulnerability was discovered by:
    Jan-Niklas Sohn working with Trend Micro Zero Day Initiative
    
    Signed-off-by: Matthieu Herrb <matthieu at herrb.eu>
    Reviewed-by: Alan Coopersmith <alan.coopersmith at oracle.com>

diff --git a/dix/pixmap.c b/dix/pixmap.c
index 1186d7dbb..5a0146bbb 100644
--- a/dix/pixmap.c
+++ b/dix/pixmap.c
@@ -116,7 +116,7 @@ AllocatePixmap(ScreenPtr pScreen, int pixDataSize)
     if (pScreen->totalPixmapSize > ((size_t) - 1) - pixDataSize)
         return NullPixmap;
 
-    pPixmap = malloc(pScreen->totalPixmapSize + pixDataSize);
+    pPixmap = calloc(1, pScreen->totalPixmapSize + pixDataSize);
     if (!pPixmap)
         return NullPixmap;