From: Li Qiang Date: Tue, 1 Nov 2016 05:37:57 -0700 Subject: [PATCH] virtio-gpu: fix information leak in capset get dispatch MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 Reviewed-by: Marc-André Lureau Message-id: 58188cae.4a6ec20a.3d2d1.aff2@mx.google.com [ kraxel: resolved conflict ] Signed-off-by: Gerd Hoffmann (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,