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virtio-gpu: fix information leak in capset get dispatch 

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>
This commit is contained in:
Li Qiang 2016-11-01 05:37:57 -07:00 committed by Gerd Hoffmann
parent b44486dfb9
commit 85d9d04447
1 changed files with 1 additions and 1 deletions
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2
hw/display/virtio-gpu-3d.c
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@ -379,7 +379,7 @@ 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,