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Re: [Qemu-devel] [PATCH] virtio-gpu: fix information leak in capset get
From: |
Marc-André Lureau |
Subject: |
Re: [Qemu-devel] [PATCH] virtio-gpu: fix information leak in capset get dispatch |
Date: |
Tue, 01 Nov 2016 12:51:23 +0000 |
Hi
On Tue, Nov 1, 2016 at 3:38 PM Li Qiang <address@hidden> wrote:
> From: Li Qiang <address@hidden>
>
> 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 <address@hidden>
>
I was about to point out this in the previous memset patch
Reviewed-by: Marc-André Lureau <address@hidden>
---
> 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 23f39de..d98b140 100644
> --- a/hw/display/virtio-gpu-3d.c
> +++ b/hw/display/virtio-gpu-3d.c
> @@ -371,7 +371,7 @@ static void virgl_cmd_get_capset(VirtIOGPU *g,
>
> virgl_renderer_get_cap_set(gc.capset_id, &max_ver,
> &max_size);
> - 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,
> --
> 1.8.3.1
>
>
> --
Marc-André Lureau