From patchwork Sun Jan 17 22:53:07 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Niedermayer X-Patchwork-Id: 25000 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 C8F7444A68D for ; Mon, 18 Jan 2021 00:54:21 +0200 (EET) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id BBB0B6880D5; Mon, 18 Jan 2021 00:54:21 +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 D7D1E687FCE for ; Mon, 18 Jan 2021 00:54:12 +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 1l1Gw0-0007NI-0M for ffmpeg-devel@ffmpeg.org; Sun, 17 Jan 2021 23:54:12 +0100 Received: from localhost ([213.47.68.29]) by vie01a-pemc-psmtp-pe12.mail.upcmail.net with ESMTP id 1Gv1l8OcZO4rA1Gv1lz6aU; Sun, 17 Jan 2021 23:53:12 +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=s1cZnMoY_nT2OaIWdpwA:9 a=1fhp2MxaeJtTNGEnv6mo:22 a=Z5ABNNGmrOfJ6cZ5bIyy:22 a=jd6J4Gguk5HxikPWLKER:22 From: Michael Niedermayer To: FFmpeg development discussions and patches Date: Sun, 17 Jan 2021 23:53:07 +0100 Message-Id: <20210117225311.17297-1-michael@niedermayer.cc> X-Mailer: git-send-email 2.17.1 X-CMAE-Envelope: MS4wfG1ZJy4hv89hYB5WnaAA+VPfQrzaT9eRt5rHR3LGWbHUutr5rr49LT2cjwzR31+EQnQrkxYVUjIvTDzdvHKzgCZCh65zalnIe0JK1QkJSKotqx4qz/r9 XbIP83ZM3tGH7cdacbF2eMXDFc2toSawAEcBD3gasgtxGBG8UUFcHb88 Subject: [FFmpeg-devel] [PATCH 1/5] avformat/sccdec: Use larger intermediate for ts/next_ts computation 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: 92237203 * 33 cannot be represented in type 'int' Fixes: 26910/clusterfuzz-testcase-minimized-ffmpeg_dem_SCC_fuzzer-6603769487949824 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavformat/sccdec.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/libavformat/sccdec.c b/libavformat/sccdec.c index 751dee7c6c..1786520944 100644 --- a/libavformat/sccdec.c +++ b/libavformat/sccdec.c @@ -93,7 +93,7 @@ static int scc_read_header(AVFormatContext *s) break; } - ts = (hh * 3600LL + mm * 60LL + ss) * 1000LL + fs * 33; + ts = (hh * 3600LL + mm * 60LL + ss) * 1000LL + fs * 33LL; while (!ff_text_eof(&tr)) { len = ff_subtitles_read_line(&tr, line2, sizeof(line2)); @@ -117,7 +117,7 @@ static int scc_read_header(AVFormatContext *s) } } - next_ts = (hh * 3600LL + mm * 60LL + ss) * 1000LL + fs * 33; + next_ts = (hh * 3600LL + mm * 60LL + ss) * 1000LL + fs * 33LL; pos = ff_text_pos(&tr); lline = (char *)&line;