From patchwork Sun Dec 1 22:26:47 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Niedermayer X-Patchwork-Id: 16514 Return-Path: X-Original-To: patchwork@ffaux-bg.ffmpeg.org Delivered-To: patchwork@ffaux-bg.ffmpeg.org Received: from ffbox0-bg.mplayerhq.hu (ffbox0-bg.ffmpeg.org [79.124.17.100]) by ffaux.localdomain (Postfix) with ESMTP id B3A68448DF2 for ; Mon, 2 Dec 2019 00:29:45 +0200 (EET) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id 8B9A568AF0B; Mon, 2 Dec 2019 00:29:45 +0200 (EET) X-Original-To: ffmpeg-devel@ffmpeg.org Delivered-To: ffmpeg-devel@ffmpeg.org Received: from vie01a-dmta-pe01-3.mx.upcmail.net (vie01a-dmta-pe01-3.mx.upcmail.net [62.179.121.156]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id 398F468AE6F for ; Mon, 2 Dec 2019 00:29:39 +0200 (EET) Received: from [172.31.216.235] (helo=vie01a-pemc-psmtp-pe12.mail.upcmail.net) by vie01a-dmta-pe01.mx.upcmail.net with esmtp (Exim 4.92) (envelope-from ) id 1ibXik-00072s-5o for ffmpeg-devel@ffmpeg.org; Sun, 01 Dec 2019 23:29:38 +0100 Received: from localhost ([213.47.68.29]) by vie01a-pemc-psmtp-pe12.mail.upcmail.net with ESMTP id bXhlifm6OwlysbXhliuwWW; Sun, 01 Dec 2019 23:28:37 +0100 X-Env-Mailfrom: michael@niedermayer.cc X-Env-Rcptto: ffmpeg-devel@ffmpeg.org X-SourceIP: 213.47.68.29 X-CNFS-Analysis: v=2.3 cv=E5OzWpVl c=1 sm=1 tr=0 a=2hcxjKEKjp0CzLx6oWAm4g==:117 a=2hcxjKEKjp0CzLx6oWAm4g==:17 a=MKtGQD3n3ToA:10 a=1oJP67jkp3AA:10 a=GEAsPZ9sns4A:10 a=ZZnuYtJkoWoA:10 a=nZOtpAppAAAA:20 a=8s8p8l0pzZpCu07ZIB8A:9 a=1fhp2MxaeJtTNGEnv6mo:22 a=Z5ABNNGmrOfJ6cZ5bIyy:22 a=jd6J4Gguk5HxikPWLKER:22 From: Michael Niedermayer To: FFmpeg development discussions and patches Date: Sun, 1 Dec 2019 23:26:47 +0100 Message-Id: <20191201222647.21589-1-michael@niedermayer.cc> X-Mailer: git-send-email 2.23.0 MIME-Version: 1.0 X-CMAE-Envelope: MS4wfKuRNMWLqhJ7XmNcncbUhYqAW2xJ5CVZ2PvmM75h0Wf0vSvXsQ3rKCqFaVJOVwof8nsimqaSHhDu+bd1C1rPFMLvEm3hJiwqqkWAhlk77/fMXrHDqUoU /Cf+t11s04KDLAwnzhX+LsLoMX8OIvtF+IKs3Q43LiExF+WMaDTiYhJw Subject: [FFmpeg-devel] [PATCH] avcodec/v210dec: move the stride read after its fully initialized X-BeenThere: ffmpeg-devel@ffmpeg.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: FFmpeg development discussions and patches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: FFmpeg development discussions and patches Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" Fixes: out of array read Fixes: 19129/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_V210_fuzzer-5068171023482880 Maybe fixes: 19130/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_V210_fuzzer-5637264407527424 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/v210dec.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/v210dec.c b/libavcodec/v210dec.c index 8483023815..044d35338b 100644 --- a/libavcodec/v210dec.c +++ b/libavcodec/v210dec.c @@ -153,7 +153,6 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, int aligned_width = ((avctx->width + 47) / 48) * 48; stride = aligned_width * 8 / 3; } - td.stride = stride; if (avpkt->size < stride * avctx->height) { if ((((avctx->width + 23) / 24) * 24 * 8) / 3 * avctx->height == avpkt->size) { @@ -166,6 +165,7 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, return AVERROR_INVALIDDATA; } } + td.stride = stride; if ( avctx->codec_tag == MKTAG('C', '2', '1', '0') && avpkt->size > 64 && AV_RN32(psrc) == AV_RN32("INFO")