From patchwork Mon Sep 30 23:12:51 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Niedermayer X-Patchwork-Id: 15431 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 13E9A447DE7 for ; Tue, 1 Oct 2019 02:14:39 +0300 (EEST) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id EC3D6688158; Tue, 1 Oct 2019 02:14:38 +0300 (EEST) X-Original-To: ffmpeg-devel@ffmpeg.org Delivered-To: ffmpeg-devel@ffmpeg.org Received: from vie01a-dmta-pe01-2.mx.upcmail.net (vie01a-dmta-pe01-2.mx.upcmail.net [62.179.121.155]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id F2157688127 for ; Tue, 1 Oct 2019 02:14:30 +0300 (EEST) 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 1iF4sA-000A88-2T for ffmpeg-devel@ffmpeg.org; Tue, 01 Oct 2019 01:14:30 +0200 Received: from localhost ([213.47.68.29]) by vie01a-pemc-psmtp-pe12.mail.upcmail.net with ESMTP id F4rCiHt3vwlysF4rCisCKd; Tue, 01 Oct 2019 01:13:30 +0200 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=jpOVt7BSZ2e4Z31A5e1TngXxSK0=:19 a=MKtGQD3n3ToA:10 a=1oJP67jkp3AA:10 a=GEAsPZ9sns4A:10 a=ZZnuYtJkoWoA:10 a=nZOtpAppAAAA:20 a=NIWFSggJGc0-8sM714wA:9 a=1fhp2MxaeJtTNGEnv6mo:22 a=Z5ABNNGmrOfJ6cZ5bIyy:22 a=SsAZrZ5W_gNWK9tOzrEV:22 From: Michael Niedermayer To: FFmpeg development discussions and patches Date: Tue, 1 Oct 2019 01:12:51 +0200 Message-Id: <20190930231254.23993-2-michael@niedermayer.cc> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20190930231254.23993-1-michael@niedermayer.cc> References: <20190930231254.23993-1-michael@niedermayer.cc> MIME-Version: 1.0 X-CMAE-Envelope: MS4wfPMlzotPWGgk7E370ut+ScUKvfefFSFVqHPlkW9TMm6StCYXpwW9PIetE8ZqVX/tmakVyincINlnB4y9FeuboXBcp/oW/zvqBMAn9NrWZLzMJxpS57lM hOB5CySHkb8fA3zwWzWF8AePzNm0mlchzBv8TPhznaSARdgAnQX6bJWS Subject: [FFmpeg-devel] [PATCH 2/5] avcodec/aliaspixdec: Check input size against minimal picture size 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: Timeout (15sec -> 72ms) Fixes: 17774/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ALIAS_PIX_fuzzer-5193929107963904 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/aliaspixdec.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/libavcodec/aliaspixdec.c b/libavcodec/aliaspixdec.c index 087b18fb91..def7e17c0f 100644 --- a/libavcodec/aliaspixdec.c +++ b/libavcodec/aliaspixdec.c @@ -62,6 +62,9 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, if (ret < 0) return ret; + if (bytestream2_get_bytes_left(&gb) < width*height / 255) + return AVERROR_INVALIDDATA; + ret = ff_get_buffer(avctx, f, 0); if (ret < 0) return ret;