From patchwork Fri May 25 13:12:39 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dan Carpenter X-Patchwork-Id: 49926 X-Patchwork-Delegate: hverkuil@xs4all.nl Received: from vger.kernel.org ([209.132.180.67]) by www.linuxtv.org with esmtp (Exim 4.84_2) (envelope-from ) id 1fMCWk-0003VZ-CF; Fri, 25 May 2018 13:13:02 +0000 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S936009AbeEYNM7 (ORCPT + 1 other); Fri, 25 May 2018 09:12:59 -0400 Received: from aserp2120.oracle.com ([141.146.126.78]:51720 "EHLO aserp2120.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S935167AbeEYNM5 (ORCPT ); Fri, 25 May 2018 09:12:57 -0400 Received: from pps.filterd (aserp2120.oracle.com [127.0.0.1]) by aserp2120.oracle.com (8.16.0.22/8.16.0.22) with SMTP id w4PDBPZa067805; Fri, 25 May 2018 13:12:53 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=date : from : to : cc : subject : message-id : mime-version : content-type : in-reply-to; s=corp-2017-10-26; bh=MbqWjSqgQKdMAlPls954GVHJl63DX5xV/98pMibN+gM=; b=Q5Lgj7MAZixWVLuru1EPQyADIs9m56aF4mYDAuFQdWXbPpPKsQrguqakxQooEnXnZrGD 5zbNBFyv6q50/eO5cHYcyn7N2zPw6J3JtW0Zqs0K23hVbu/lCmtn3MQm9ScohYVOubnn GjrfPlxpB6YCHh2Zdk7XAUHp5KgEgHpXa0BvGnAshWS+A0NG9OdQyDKP5/jvrx/6FVHK Q2Y53Z751Il4k45rVxJJwo6gTg0A4Chh+cV/K5dzOuyXoaQeYETKtxFoQZj6xBcIFvJj LCzffFZXV0dTLgeSnebn9tKmlH9ldZjBw/1I5DnK8QIOLHjdGgukerf33sft68MJxBG7 hA== Received: from aserv0022.oracle.com (aserv0022.oracle.com [141.146.126.234]) by aserp2120.oracle.com with ESMTP id 2j62swb9rr-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 25 May 2018 13:12:53 +0000 Received: from aserv0121.oracle.com (aserv0121.oracle.com [141.146.126.235]) by aserv0022.oracle.com (8.14.4/8.14.4) with ESMTP id w4PDCqSR002952 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 25 May 2018 13:12:53 GMT Received: from abhmp0016.oracle.com (abhmp0016.oracle.com [141.146.116.22]) by aserv0121.oracle.com (8.14.4/8.13.8) with ESMTP id w4PDCq8b004898; Fri, 25 May 2018 13:12:52 GMT Received: from kili.mountain (/41.210.155.166) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Fri, 25 May 2018 06:12:51 -0700 Date: Fri, 25 May 2018 16:12:39 +0300 From: Dan Carpenter To: "Lad, Prabhakar" , Manjunath Hadli , Hans Verkuil Cc: Mauro Carvalho Chehab , linux-media@vger.kernel.org, kernel-janitors@vger.kernel.org Subject: [PATCH v2] media: davinci vpbe: array underflow in vpbe_enum_outputs() Message-ID: <20180525131239.45exrwgxr2f3kb57@kili.mountain> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <054ede38-b194-d1f9-7961-851c8b1acd5f@xs4all.nl> X-Mailer: git-send-email haha only kidding User-Agent: NeoMutt/20170113 (1.7.2) X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=8903 signatures=668700 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=977 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1711220000 definitions=main-1805250143 Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org In vpbe_enum_outputs() we check if (temp_index >= cfg->num_outputs) but the problem is that temp_index can be negative. I've made cgf->num_outputs unsigned to fix this issue. Fixes: 66715cdc3224 ("[media] davinci vpbe: VPBE display driver") Signed-off-by: Dan Carpenter Acked-by: Lad, Prabhakar --- v2: fix it a different way diff --git a/include/media/davinci/vpbe.h b/include/media/davinci/vpbe.h index 79a566d7defd..180a05e91497 100644 --- a/include/media/davinci/vpbe.h +++ b/include/media/davinci/vpbe.h @@ -92,7 +92,7 @@ struct vpbe_config { struct encoder_config_info *ext_encoders; /* amplifier information goes here */ struct amp_config_info *amp; - int num_outputs; + unsigned int num_outputs; /* Order is venc outputs followed by LCD and then external encoders */ struct vpbe_output *outputs; };