From patchwork Sat Jun 13 20:03:45 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Niedermayer X-Patchwork-Id: 20338 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 8512B447F03 for ; Sat, 13 Jun 2020 23:04:53 +0300 (EEST) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id 5CBDB68AF97; Sat, 13 Jun 2020 23:04:53 +0300 (EEST) X-Original-To: ffmpeg-devel@ffmpeg.org Delivered-To: ffmpeg-devel@ffmpeg.org Received: from vie01a-dmta-pe05-3.mx.upcmail.net (vie01a-dmta-pe05-3.mx.upcmail.net [84.116.36.13]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id 7052E6891E2 for ; Sat, 13 Jun 2020 23:04:47 +0300 (EEST) 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 1jkCOV-0005BI-0C for ffmpeg-devel@ffmpeg.org; Sat, 13 Jun 2020 22:04:47 +0200 Received: from localhost ([213.47.68.29]) by vie01a-pemc-psmtp-pe12.mail.upcmail.net with ESMTP id kCNXjZEDo6Jy6kCNXjgUMn; Sat, 13 Jun 2020 22:03:47 +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=GKl27dFK 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=qkY8BJN_VaEgdKUFglgA:9 a=1fhp2MxaeJtTNGEnv6mo:22 a=Z5ABNNGmrOfJ6cZ5bIyy:22 a=SsAZrZ5W_gNWK9tOzrEV:22 From: Michael Niedermayer To: FFmpeg development discussions and patches Date: Sat, 13 Jun 2020 22:03:45 +0200 Message-Id: <20200613200345.26762-2-michael@niedermayer.cc> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200613200345.26762-1-michael@niedermayer.cc> References: <20200613200345.26762-1-michael@niedermayer.cc> X-CMAE-Envelope: MS4wfG8SmlT3e7bjb+vIQBEXdPC2zV1egPgoPRbmEIXsu8rzG2rVmTxPYkoVZ2lcoxH2L9gC/gz2eLZe6W1RPXnPWug4mK9h5t8LJaRLFwisT2p8oX+ZB4U3 zQIwHNq9dgLHF3f67PlDpkjgIxtPdrXM+9cIaD3NOAFKkIltkSz1pLss Subject: [FFmpeg-devel] [PATCH 2/2] avcodec/mv30: check mode_size vs. input space 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: Timeout (longer than my patience vs 1sec) Fixes: 22984/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MV30_fuzzer-5630021988515840 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/mv30.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/libavcodec/mv30.c b/libavcodec/mv30.c index 013a5753fe..76b9170eaf 100644 --- a/libavcodec/mv30.c +++ b/libavcodec/mv30.c @@ -410,6 +410,9 @@ static int decode_intra(AVCodecContext *avctx, GetBitContext *gb, AVFrame *frame int ret; mgb = *gb; + if (get_bits_left(gb) < s->mode_size * 8) + return AVERROR_INVALIDDATA; + skip_bits_long(gb, s->mode_size * 8); linesize[0] = frame->linesize[0];