From patchwork Wed Feb 12 22:03:18 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Niedermayer X-Patchwork-Id: 17767 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 552F944A919 for ; Thu, 13 Feb 2020 00:10:53 +0200 (EET) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id 401B768AE7C; Thu, 13 Feb 2020 00:10:53 +0200 (EET) X-Original-To: ffmpeg-devel@ffmpeg.org Delivered-To: ffmpeg-devel@ffmpeg.org Received: from vie01a-dmta-pe05-1.mx.upcmail.net (vie01a-dmta-pe05-1.mx.upcmail.net [84.116.36.11]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id 6753D68A7E1 for ; Thu, 13 Feb 2020 00:10:47 +0200 (EET) Received: from [172.31.216.235] (helo=vie01a-pemc-psmtp-pe12.mail.upcmail.net) by vie01a-dmta-pe05.mx.upcmail.net with esmtp (Exim 4.92) (envelope-from ) id 1j207I-0008LG-0M for ffmpeg-devel@ffmpeg.org; Wed, 12 Feb 2020 23:04:20 +0100 Received: from localhost ([213.47.68.29]) by vie01a-pemc-psmtp-pe12.mail.upcmail.net with ESMTP id 206JjoXoswlys206Jjhj1u; Wed, 12 Feb 2020 23:03:20 +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=2_ACs3Lyp3NMaNDBcS8A:9 a=1fhp2MxaeJtTNGEnv6mo:22 a=Z5ABNNGmrOfJ6cZ5bIyy:22 a=bWyr8ysk75zN3GCy5bjg:22 From: Michael Niedermayer To: FFmpeg development discussions and patches Date: Wed, 12 Feb 2020 23:03:18 +0100 Message-Id: <20200212220319.4802-1-michael@niedermayer.cc> X-Mailer: git-send-email 2.17.1 X-CMAE-Envelope: MS4wfMEy6voHO82RyRoa4G4rDvSDBcHVDxYeH7TMkYp8rLMbRqmcIPF8/s97wkqe5g9EcazWe3tl1vnrDi7uFg5NzkOTm5tTr/6VJKMXHKr4AgsYEpHKuyFM dPxCoo5DpR3MqWysPYKa2b/Q0LMdUN2neQZ+DzJR8j0RLFL2OSHqK3sr Subject: [FFmpeg-devel] [PATCH 1/2] avcodec/midivid: Check dimensions to be the multiple assumed by the implementation 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 MIME-Version: 1.0 Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" Fixes: out of array access Fixes: 20626/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MVDV_fuzzer-6279905350516736 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/midivid.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/libavcodec/midivid.c b/libavcodec/midivid.c index 8d4c3b369e..a30cf25207 100644 --- a/libavcodec/midivid.c +++ b/libavcodec/midivid.c @@ -236,6 +236,9 @@ static av_cold int decode_init(AVCodecContext *avctx) MidiVidContext *s = avctx->priv_data; int ret = av_image_check_size(avctx->width, avctx->height, 0, avctx); + if (avctx->width%32 || avctx->height%4) + ret = AVERROR_INVALIDDATA; + if (ret < 0) { av_log(avctx, AV_LOG_ERROR, "Invalid image size %dx%d.\n", avctx->width, avctx->height);