From mboxrd@z Thu Jan  1 00:00:00 1970
From: Dan Carpenter <dan.carpenter@oracle.com>
Subject: [PATCH] drm/i810: Prevent underflow in ioctl
Date: Fri, 4 Oct 2019 13:22:51 +0300
Message-ID: <20191004102251.GC823@mwanda>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
Return-path: <dri-devel-bounces@lists.freedesktop.org>
Received: from userp2120.oracle.com (userp2120.oracle.com [156.151.31.85])
 by gabe.freedesktop.org (Postfix) with ESMTPS id 82D356EB16
 for <dri-devel@lists.freedesktop.org>; Fri,  4 Oct 2019 10:23:13 +0000 (UTC)
Content-Disposition: inline
List-Unsubscribe: <https://lists.freedesktop.org/mailman/options/dri-devel>,
 <mailto:dri-devel-request@lists.freedesktop.org?subject=unsubscribe>
List-Archive: <https://lists.freedesktop.org/archives/dri-devel>
List-Post: <mailto:dri-devel@lists.freedesktop.org>
List-Help: <mailto:dri-devel-request@lists.freedesktop.org?subject=help>
List-Subscribe: <https://lists.freedesktop.org/mailman/listinfo/dri-devel>,
 <mailto:dri-devel-request@lists.freedesktop.org?subject=subscribe>
Errors-To: dri-devel-bounces@lists.freedesktop.org
Sender: "dri-devel" <dri-devel-bounces@lists.freedesktop.org>
To: David Airlie <airlied@linux.ie>
Cc: kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Sam Ravnborg <sam@ravnborg.org>, Emil Velikov <emil.velikov@collabora.com>
List-Id: dri-devel@lists.freedesktop.org
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