From: Thomas Hellstrom <thellstrom@vmware.com>
To: Dan Carpenter <dan.carpenter@oracle.com>
Cc: kernel-janitors@vger.kernel.org,
Vasiliy Kulikov <segooon@gmail.com>,
dri-devel@lists.freedesktop.org,
Jerome Glisse <jglisse@redhat.com>,
Dave Airlie <airlied@redhat.com>
Subject: Re: [patch] vmwgfx: information leak in vmw_execbuf_copy_fence_user()
Date: Tue, 18 Oct 2011 06:38:22 +0000 [thread overview]
Message-ID: <4E9D1EDE.9090207@vmware.com> (raw)
In-Reply-To: <20111018061012.GE27732@elgon.mountain>
On 10/18/2011 08:10 AM, Dan Carpenter wrote:
> If ret is non-zero then we don't initialize the struct which leaks
> stack information to user space.
>
> Signed-off-by: Dan Carpenter<dan.carpenter@oracle.com>
>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
> diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c b/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
> index d4a1d8b..28e1c35 100644
> --- a/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
> +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
> @@ -1070,6 +1070,8 @@ vmw_execbuf_copy_fence_user(struct vmw_private *dev_priv,
> if (user_fence_rep = NULL)
> return;
>
> + memset(&fence_rep, 0, sizeof(fence_rep));
> +
> fence_rep.error = ret;
> if (ret = 0) {
> BUG_ON(fence = NULL);
>
next prev parent reply other threads:[~2011-10-18 6:38 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-18 6:10 [patch] vmwgfx: information leak in vmw_execbuf_copy_fence_user() Dan Carpenter
2011-10-18 6:38 ` Thomas Hellstrom [this message]
2011-10-18 9:30 ` [patch] vmwgfx: information leak in Vasiliy Kulikov
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