From patchwork Sat Jul 13 20:25:03 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Niedermayer X-Patchwork-Id: 13932 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 1BA47449E12 for ; Sat, 13 Jul 2019 23:32:07 +0300 (EEST) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id 02A0368AD2F; Sat, 13 Jul 2019 23:32:07 +0300 (EEST) X-Original-To: ffmpeg-devel@ffmpeg.org Delivered-To: ffmpeg-devel@ffmpeg.org Received: from vie01a-dmta-pe07-2.mx.upcmail.net (vie01a-dmta-pe07-2.mx.upcmail.net [84.116.36.18]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id 1F35968A999 for ; Sat, 13 Jul 2019 23:32:01 +0300 (EEST) Received: from [172.31.216.235] (helo=vie01a-pemc-psmtp-pe12.mail.upcmail.net) by vie01a-dmta-pe07.mx.upcmail.net with esmtp (Exim 4.92) (envelope-from ) id 1hmOb1-0008Wj-1Y for ffmpeg-devel@ffmpeg.org; Sat, 13 Jul 2019 22:26:15 +0200 Received: from localhost ([213.47.41.20]) by vie01a-pemc-psmtp-pe12.mail.upcmail.net with ESMTP id mOa3hcg645D5NmOa3hKbNi; Sat, 13 Jul 2019 22:25:15 +0200 X-Env-Mailfrom: michael@niedermayer.cc X-Env-Rcptto: ffmpeg-devel@ffmpeg.org X-SourceIP: 213.47.41.20 X-CNFS-Analysis: v=2.3 cv=bu8y+3Si c=1 sm=1 tr=0 a=I1eytVlZLDX1BM2VTtTtSw==:117 a=I1eytVlZLDX1BM2VTtTtSw==:17 a=jpOVt7BSZ2e4Z31A5e1TngXxSK0=:19 a=MKtGQD3n3ToA:10 a=1oJP67jkp3AA:10 a=GEAsPZ9sns4A:10 a=ZZnuYtJkoWoA:10 a=nZOtpAppAAAA:20 a=Cn1a1WqR2sDehnPi9f0A:9 a=VlZU0XKO32wA:10 a=1fhp2MxaeJtTNGEnv6mo:22 a=Z5ABNNGmrOfJ6cZ5bIyy:22 a=bWyr8ysk75zN3GCy5bjg:22 From: Michael Niedermayer To: FFmpeg development discussions and patches Date: Sat, 13 Jul 2019 22:25:03 +0200 Message-Id: <20190713202506.14871-3-michael@niedermayer.cc> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190713202506.14871-1-michael@niedermayer.cc> References: <20190713202506.14871-1-michael@niedermayer.cc> MIME-Version: 1.0 X-CMAE-Envelope: MS4wfCUkEIMJVxB0520tRks04qAPZ8cyupH8ks3yUSsunZ/avC1UisFjpSVbFe0YzJh0bZ4sFuz7idjYXrj7Iq07QyXuUJG8/s/wr391J7RgahKrWtqLDItV lkWTRsALg85aJY36yDW47KVg+UoFePoBNwSKDHedkEoxBbS3qM6HCqpM Subject: [FFmpeg-devel] [PATCH 3/6] avformat/vividas: Check buffer size before allocation 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: out of array access Fixes: 15365/clusterfuzz-testcase-minimized-ffmpeg_DEMUXER_fuzzer-5716153105645568 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavformat/vividas.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/libavformat/vividas.c b/libavformat/vividas.c index 830e318645..2564a163cb 100644 --- a/libavformat/vividas.c +++ b/libavformat/vividas.c @@ -251,6 +251,9 @@ static uint8_t *read_sb_block(AVIOContext *src, unsigned *size, *key = tmpkey; } + if (n < 8) + return NULL; + buf = av_malloc(n); if (!buf) return NULL;