[PATCH] Replace malloc with calloc to initialize the buffers[] as NULL in do_get_buffers function

[Kristian Høgsberg]

From: Justin Dou <Justin.Dou at intel.com>

The calling for allocate_or_reuse_buffer may fail due to some reason, e.g. out of memory.
If the buffers[] were not initialized to be NULL, the following err_out may try to access an illegal memory, which will cause X crash afterward.

Reviewed-by: Kristian Høgsberg <krh at bitplanet.net>
Signed-off-by: Justin Dou <Justin.Dou at intel.com>
---
 hw/xfree86/dri2/dri2.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/hw/xfree86/dri2/dri2.c b/hw/xfree86/dri2/dri2.c
index 34f735f..5d31e77 100644
--- a/hw/xfree86/dri2/dri2.c
+++ b/hw/xfree86/dri2/dri2.c
@@ -403,7 +403,7 @@ do_get_buffers(DrawablePtr pDraw, int *width, int *height,
 	&& (pDraw->height == pPriv->height)
 	&& (pPriv->serialNumber == DRI2DrawableSerial(pDraw));
 
-    buffers = malloc((count + 1) * sizeof(buffers[0]));
+    buffers = calloc((count + 1), sizeof(buffers[0]));
 
     for (i = 0; i < count; i++) {
 	const unsigned attachment = *(attachments++);
-- 
1.7.2.2