From patchwork Thu Jan 14 22:51:15 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Niedermayer X-Patchwork-Id: 24951 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 1DB9644B7DA for ; Fri, 15 Jan 2021 00:57:56 +0200 (EET) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id EF27E680BEB; Fri, 15 Jan 2021 00:57:55 +0200 (EET) X-Original-To: ffmpeg-devel@ffmpeg.org Delivered-To: ffmpeg-devel@ffmpeg.org Received: from vie01a-dmta-pe01-1.mx.upcmail.net (vie01a-dmta-pe01-1.mx.upcmail.net [62.179.121.154]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id 57920680B1B for ; Fri, 15 Jan 2021 00:57:49 +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 1l0BTV-00022Q-0I for ffmpeg-devel@ffmpeg.org; Thu, 14 Jan 2021 23:52:17 +0100 Received: from localhost ([213.47.68.29]) by vie01a-pemc-psmtp-pe12.mail.upcmail.net with ESMTP id 0BSXlApMyO4rA0BSXlHs7F; Thu, 14 Jan 2021 23:51:17 +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=wS0i8EZKuvXU8Sbk2HEA:9 a=1fhp2MxaeJtTNGEnv6mo:22 a=Z5ABNNGmrOfJ6cZ5bIyy:22 a=UDnyf2zBuKT2w-IlGP_r:22 From: Michael Niedermayer To: FFmpeg development discussions and patches Date: Thu, 14 Jan 2021 23:51:15 +0100 Message-Id: <20210114225116.13486-6-michael@niedermayer.cc> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210114225116.13486-1-michael@niedermayer.cc> References: <20210114225116.13486-1-michael@niedermayer.cc> X-CMAE-Envelope: MS4wfFm4AA4A0fevEQANCGmqXK19oyINX51/uJoaoNWMDxhygbVOJ4OEwdpvdagBI9dyK50JpvGBFV71/ZMuQhAtB2kuEbRnHa23DYhi/mqf9P+SYnxjWT4Y k1auQ0/DkAA7ea41oaoWxfXuUP+/BWd+tuVvf2XuSdIr7KeJnoG1WH51 Subject: [FFmpeg-devel] [PATCH 6/7] avformat/lxfdec: Fix multiple integer overflows related to track_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 MIME-Version: 1.0 Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" Fixes: signed integer overflow: 538976288 * 8 cannot be represented in type 'int' Fixes: 26910/clusterfuzz-testcase-minimized-ffmpeg_dem_LXF_fuzzer-6634030636335104 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavformat/lxfdec.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/libavformat/lxfdec.c b/libavformat/lxfdec.c index fa84ceea78..509d19fe7f 100644 --- a/libavformat/lxfdec.c +++ b/libavformat/lxfdec.c @@ -195,7 +195,7 @@ static int get_packet_header(AVFormatContext *s) return AVERROR_PATCHWELCOME; } - samples = track_size * 8 / st->codecpar->bits_per_coded_sample; + samples = track_size * 8LL / st->codecpar->bits_per_coded_sample; //use audio packet size to determine video standard //for NTSC we have one 8008-sample audio frame per five video frames @@ -210,6 +210,8 @@ static int get_packet_header(AVFormatContext *s) avpriv_set_pts_info(s->streams[0], 64, 1, 25); } + if (av_popcount(channels) * (uint64_t)track_size > INT_MAX) + return AVERROR_INVALIDDATA; //TODO: warning if track mask != (1 << channels) - 1? ret = av_popcount(channels) * track_size;