From patchwork Tue Jan 12 21:51:16 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Niedermayer X-Patchwork-Id: 24931 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 413EA44A0D3 for ; Tue, 12 Jan 2021 23:57:46 +0200 (EET) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id 1842168AC09; Tue, 12 Jan 2021 23:57:46 +0200 (EET) X-Original-To: ffmpeg-devel@ffmpeg.org Delivered-To: ffmpeg-devel@ffmpeg.org Received: from vie01a-dmta-pe03-2.mx.upcmail.net (vie01a-dmta-pe03-2.mx.upcmail.net [62.179.121.161]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id EC9846809B4 for ; Tue, 12 Jan 2021 23:57:39 +0200 (EET) Received: from [172.31.216.235] (helo=vie01a-pemc-psmtp-pe12.mail.upcmail.net) by vie01a-dmta-pe03.mx.upcmail.net with esmtp (Exim 4.92) (envelope-from ) id 1kzRaM-0003Fl-CD for ffmpeg-devel@ffmpeg.org; Tue, 12 Jan 2021 22:52:18 +0100 Received: from localhost ([213.47.68.29]) by vie01a-pemc-psmtp-pe12.mail.upcmail.net with ESMTP id zRZOkQETyO4rAzRZOkasJc; Tue, 12 Jan 2021 22:51:18 +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=RNDN4Lq+ 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=4MUxETX0eZE_1RVvc6cA:9 a=1fhp2MxaeJtTNGEnv6mo:22 a=Z5ABNNGmrOfJ6cZ5bIyy:22 a=UDnyf2zBuKT2w-IlGP_r:22 From: Michael Niedermayer To: FFmpeg development discussions and patches Date: Tue, 12 Jan 2021 22:51:16 +0100 Message-Id: <20210112215116.21186-4-michael@niedermayer.cc> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210112215116.21186-1-michael@niedermayer.cc> References: <20210112215116.21186-1-michael@niedermayer.cc> X-CMAE-Envelope: MS4wfHRdOMjZKDltsVAuGBQWrKcWa4nNtcrYK9HafSJSyxugoBYYGjB+a2xaK6tV68ymrKzSZvj0C8RAqIKGlActYbEyjMtCr4DYn3CqR6xw4vFhRXGxiLW7 5uGHgLpKl+UQiiHoxsTRep3QxIxG5Zixt43eawZ7wjQJNJ6/M519Hsqj Subject: [FFmpeg-devel] [PATCH 4/4] avformat/electronicarts: More chunk_size checks 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: Timeout Fixes: 26909/clusterfuzz-testcase-minimized-ffmpeg_dem_EA_fuzzer-6489496553783296 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavformat/electronicarts.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/libavformat/electronicarts.c b/libavformat/electronicarts.c index 4c292f29a2..a98a8d604e 100644 --- a/libavformat/electronicarts.c +++ b/libavformat/electronicarts.c @@ -607,10 +607,14 @@ static int ea_read_packet(AVFormatContext *s, AVPacket *pkt) break; } else if (ea->audio_codec == AV_CODEC_ID_PCM_S16LE_PLANAR || ea->audio_codec == AV_CODEC_ID_MP3) { + if (chunk_size < 12) + return AVERROR_INVALIDDATA; num_samples = avio_rl32(pb); avio_skip(pb, 8); chunk_size -= 12; } else if (ea->audio_codec == AV_CODEC_ID_ADPCM_PSX) { + if (chunk_size < 8) + return AVERROR_INVALIDDATA; avio_skip(pb, 8); chunk_size -= 8; } @@ -693,6 +697,8 @@ static int ea_read_packet(AVFormatContext *s, AVPacket *pkt) case fVGT_TAG: case MADm_TAG: case MADe_TAG: + if (chunk_size > INT_MAX - 8) + return AVERROR_INVALIDDATA; avio_seek(pb, -8, SEEK_CUR); // include chunk preamble chunk_size += 8; goto get_video_packet;