From patchwork Sat Sep 28 23:53:45 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Niedermayer X-Patchwork-Id: 15368 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 CE0E2449600 for ; Sun, 29 Sep 2019 02:55:28 +0300 (EEST) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id B6047689988; Sun, 29 Sep 2019 02:55:28 +0300 (EEST) X-Original-To: ffmpeg-devel@ffmpeg.org Delivered-To: ffmpeg-devel@ffmpeg.org Received: from vie01a-dmta-pe03-1.mx.upcmail.net (vie01a-dmta-pe03-1.mx.upcmail.net [62.179.121.160]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id 6E15B6881E1 for ; Sun, 29 Sep 2019 02:55:20 +0300 (EEST) 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 1iEMYa-0006QG-2v for ffmpeg-devel@ffmpeg.org; Sun, 29 Sep 2019 01:55:20 +0200 Received: from localhost ([213.47.68.29]) by vie01a-pemc-psmtp-pe12.mail.upcmail.net with ESMTP id EMXbiHasBwlysEMXciYtlE; Sun, 29 Sep 2019 01:54:20 +0200 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=E5OzWpVl c=1 sm=1 tr=0 a=2hcxjKEKjp0CzLx6oWAm4g==:117 a=2hcxjKEKjp0CzLx6oWAm4g==:17 a=jpOVt7BSZ2e4Z31A5e1TngXxSK0=:19 a=MKtGQD3n3ToA:10 a=1oJP67jkp3AA:10 a=GEAsPZ9sns4A:10 a=ZZnuYtJkoWoA:10 a=nZOtpAppAAAA:20 a=xkspb5foWRbV94001CMA:9 a=1fhp2MxaeJtTNGEnv6mo:22 a=Z5ABNNGmrOfJ6cZ5bIyy:22 a=SsAZrZ5W_gNWK9tOzrEV:22 From: Michael Niedermayer To: FFmpeg development discussions and patches Date: Sun, 29 Sep 2019 01:53:45 +0200 Message-Id: <20190928235345.26528-5-michael@niedermayer.cc> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20190928235345.26528-1-michael@niedermayer.cc> References: <20190928235345.26528-1-michael@niedermayer.cc> MIME-Version: 1.0 X-CMAE-Envelope: MS4wfLWuQiTZJnTyYl+S5syFY5JAGZH42IDYS2b5DHdDsGi4JxXaNmGydbzF+dajSLyZ5C27wC1wFurepEMTiwNeCgHrA2ewM2lWHytCG4FWshTCwD0UiUKP 6wXbTQIpEsSsDyCW8FW61sTx4Mmc/lcSQF4aMtyQedYOXx1xIjrybGKX Subject: [FFmpeg-devel] [PATCH 5/5] avcodec/pcm: Check bits_per_coded_sample 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: shift exponent -2 is negative Fixes: 17736/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_PCM_F16LE_fuzzer-5742815929171968 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/pcm.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/libavcodec/pcm.c b/libavcodec/pcm.c index 83850cc793..abd61e281c 100644 --- a/libavcodec/pcm.c +++ b/libavcodec/pcm.c @@ -264,6 +264,9 @@ static av_cold int pcm_decode_init(AVCodecContext *avctx) break; case AV_CODEC_ID_PCM_F16LE: case AV_CODEC_ID_PCM_F24LE: + if (avctx->bits_per_coded_sample < 1) + return AVERROR_INVALIDDATA; + s->scale = 1. / (1 << (avctx->bits_per_coded_sample - 1)); s->fdsp = avpriv_float_dsp_alloc(0); if (!s->fdsp)