From patchwork Sun May 31 13:50:20 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Niedermayer X-Patchwork-Id: 20045 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 19851449F63 for ; Sun, 31 May 2020 16:51:31 +0300 (EEST) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id 0749A68A41E; Sun, 31 May 2020 16:51:31 +0300 (EEST) X-Original-To: ffmpeg-devel@ffmpeg.org Delivered-To: ffmpeg-devel@ffmpeg.org Received: from vie01a-dmta-pe03-3.mx.upcmail.net (vie01a-dmta-pe03-3.mx.upcmail.net [62.179.121.162]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id D6F5B6808B8 for ; Sun, 31 May 2020 16:51:21 +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 1jfOMz-0003eh-0E for ffmpeg-devel@ffmpeg.org; Sun, 31 May 2020 15:51:21 +0200 Received: from localhost ([213.47.68.29]) by vie01a-pemc-psmtp-pe12.mail.upcmail.net with ESMTP id fOM1j4Rri6Jy6fOM1jmWji; Sun, 31 May 2020 15:50:21 +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=_ZtodtwOMnNZhG7jsmMA:9 a=1fhp2MxaeJtTNGEnv6mo:22 a=Z5ABNNGmrOfJ6cZ5bIyy:22 a=UDnyf2zBuKT2w-IlGP_r:22 From: Michael Niedermayer To: FFmpeg development discussions and patches Date: Sun, 31 May 2020 15:50:20 +0200 Message-Id: <20200531135020.5675-4-michael@niedermayer.cc> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200531135020.5675-1-michael@niedermayer.cc> References: <20200531135020.5675-1-michael@niedermayer.cc> X-CMAE-Envelope: MS4wfLuZn0DmCp0bksjzX64Nf8+kQYssoiPAXWedyZ0VepIqQu8wtMmM4RxxLvOy5ElqosidYyOVJBzyP+XXSzf48faBUsTEVNWw8P095NN+jIhJtcc4How9 tXFS4o7J0SHLK5DM9f3HH0DC7K78/PVxY2Uz6I3bO1qW5+xoCcv0Y4pX Subject: [FFmpeg-devel] [PATCH 4/4] avcodec/adpcm: XA: Check shift similar to filter 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: negative shift Fixes: 22499/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ADPCM_XA_fuzzer-5765452130418688 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/adpcm.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/libavcodec/adpcm.c b/libavcodec/adpcm.c index dc4a9222af..79c5d625d1 100644 --- a/libavcodec/adpcm.c +++ b/libavcodec/adpcm.c @@ -559,6 +559,10 @@ static int xa_decode(AVCodecContext *avctx, int16_t *out0, int16_t *out1, avpriv_request_sample(avctx, "unknown XA-ADPCM filter %d", filter); filter=0; } + if (shift < 0) { + avpriv_request_sample(avctx, "unknown XA-ADPCM shift %d", shift); + shift = 0; + } f0 = xa_adpcm_table[filter][0]; f1 = xa_adpcm_table[filter][1]; @@ -584,10 +588,14 @@ static int xa_decode(AVCodecContext *avctx, int16_t *out0, int16_t *out1, shift = 12 - (in[5+i*2] & 15); filter = in[5+i*2] >> 4; - if (filter >= FF_ARRAY_ELEMS(xa_adpcm_table)) { + if (filter >= FF_ARRAY_ELEMS(xa_adpcm_table) || shift < 0) { avpriv_request_sample(avctx, "unknown XA-ADPCM filter %d", filter); filter=0; } + if (shift < 0) { + avpriv_request_sample(avctx, "unknown XA-ADPCM shift %d", shift); + shift = 0; + } f0 = xa_adpcm_table[filter][0]; f1 = xa_adpcm_table[filter][1];