From: Li Qiang <liqiang6-s@360.cn>
Date: Tue, 1 Nov 2016 05:37:57 -0700
Subject: [PATCH] virtio-gpu: fix information leak in capset get dispatch
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In virgl_cmd_get_capset function, it uses g_malloc to allocate
a response struct to the guest. As the 'resp'struct hasn't been full
initialized it will lead the 'resp->padding' field to the guest.
Use g_malloc0 to avoid this.

Signed-off-by: Li Qiang <liqiang6-s@360.cn>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-id: 58188cae.4a6ec20a.3d2d1.aff2@mx.google.com

[ kraxel: resolved conflict ]

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
(cherry picked from commit 85d9d044471f93c48c5c396f7e217b4ef12f69f8)
---
 hw/display/virtio-gpu-3d.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/display/virtio-gpu-3d.c b/hw/display/virtio-gpu-3d.c
index bb2e9a1..420187e 100644
--- a/hw/display/virtio-gpu-3d.c
+++ b/hw/display/virtio-gpu-3d.c
@@ -374,7 +374,7 @@ static void virgl_cmd_get_capset(VirtIOGPU *g,
         return;
     }
 
-    resp = g_malloc(sizeof(*resp) + max_size);
+    resp = g_malloc0(sizeof(*resp) + max_size);
     resp->hdr.type = VIRTIO_GPU_RESP_OK_CAPSET;
     virgl_renderer_fill_caps(gc.capset_id,
                              gc.capset_version,