From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ffbox0-bg.mplayerhq.hu (ffbox0-bg.ffmpeg.org [79.124.17.100]) by master.gitmailbox.com (Postfix) with ESMTP id 84E9745CAF for ; Sat, 30 Sep 2023 22:30:56 +0000 (UTC) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id 994C468CD3C; Sun, 1 Oct 2023 01:30:53 +0300 (EEST) Received: from relay7-d.mail.gandi.net (relay7-d.mail.gandi.net [217.70.183.200]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id D04C868CD25 for ; Sun, 1 Oct 2023 01:30:47 +0300 (EEST) Received: by mail.gandi.net (Postfix) with ESMTPSA id 2E69620003 for ; Sat, 30 Sep 2023 22:30:46 +0000 (UTC) From: Michael Niedermayer To: FFmpeg development discussions and patches Date: Sun, 1 Oct 2023 00:30:32 +0200 Message-Id: <20230930223046.22896-1-michael@niedermayer.cc> X-Mailer: git-send-email 2.17.1 X-Spam-Flag: yes X-Spam-Level: ************** X-GND-Spam-Score: 215 X-GND-Status: SPAM X-GND-Sasl: michael@niedermayer.cc Subject: [FFmpeg-devel] [PATCH 01/15] avformat/concatdec: Check in/outpoint for overflow X-BeenThere: ffmpeg-devel@ffmpeg.org X-Mailman-Version: 2.1.29 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 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" Archived-At: List-Archive: List-Post: Fixes: signed integer overflow: 91542414454000000 - -9154241494546000000 cannot be represented in type 'long' Fixes: 51896/clusterfuzz-testcase-minimized-ffmpeg_dem_CONCAT_fuzzer-4739147999084544 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavformat/concatdec.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/libavformat/concatdec.c b/libavformat/concatdec.c index 5d4f67d0acd..114b6c6564c 100644 --- a/libavformat/concatdec.c +++ b/libavformat/concatdec.c @@ -667,7 +667,9 @@ static int concat_read_header(AVFormatContext *avf) else time = cat->files[i].start_time; if (cat->files[i].user_duration == AV_NOPTS_VALUE) { - if (cat->files[i].inpoint == AV_NOPTS_VALUE || cat->files[i].outpoint == AV_NOPTS_VALUE) + if (cat->files[i].inpoint == AV_NOPTS_VALUE || cat->files[i].outpoint == AV_NOPTS_VALUE || + cat->files[i].outpoint - (uint64_t)cat->files[i].inpoint != av_sat_sub64(cat->files[i].outpoint, cat->files[i].inpoint) + ) break; cat->files[i].user_duration = cat->files[i].outpoint - cat->files[i].inpoint; } -- 2.17.1 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-request@ffmpeg.org with subject "unsubscribe".