From patchwork Mon Nov 23 23:42:04 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Niedermayer X-Patchwork-Id: 24020 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 2D8CD447EAD for ; Tue, 24 Nov 2020 01:43:18 +0200 (EET) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id 14C0C68BC2F; Tue, 24 Nov 2020 01:43:18 +0200 (EET) X-Original-To: ffmpeg-devel@ffmpeg.org Delivered-To: ffmpeg-devel@ffmpeg.org Received: from vie01a-dmta-pe02-2.mx.upcmail.net (vie01a-dmta-pe02-2.mx.upcmail.net [62.179.121.158]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id 188D668BB21 for ; Tue, 24 Nov 2020 01:43:12 +0200 (EET) Received: from [172.31.216.235] (helo=vie01a-pemc-psmtp-pe12.mail.upcmail.net) by vie01a-dmta-pe02.mx.upcmail.net with esmtp (Exim 4.92) (envelope-from ) id 1khLU9-0006uD-0Q for ffmpeg-devel@ffmpeg.org; Tue, 24 Nov 2020 00:43:05 +0100 Received: from localhost ([213.47.68.29]) by vie01a-pemc-psmtp-pe12.mail.upcmail.net with ESMTP id hLTBkBrntO4rAhLTBkw1Vb; Tue, 24 Nov 2020 00:42:05 +0100 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=RNDN4Lq+ 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=AHdlMUvfN4JwJa4C_FoA:9 a=1fhp2MxaeJtTNGEnv6mo:22 a=GJ-T4y_Td4A299CsuMnx:22 a=p-dnK0njbqwfn1k4-x12:22 a=jjky5lfK57Ii_Ajn6BuG:22 From: Michael Niedermayer To: FFmpeg development discussions and patches Date: Tue, 24 Nov 2020 00:42:04 +0100 Message-Id: <20201123234204.24194-3-michael@niedermayer.cc> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201123234204.24194-1-michael@niedermayer.cc> References: <20201123234204.24194-1-michael@niedermayer.cc> X-CMAE-Envelope: MS4wfJshOrwTFC3T/aKlS1alyDn0CzHt9/fbHZvkXvDT9PDuLRzu8l84GEp0jr2gzGU1nh76QdHT0S7YiSvd1IEPM3iHzNUvPhJO+0WaNrgGQCSKXw8SlhRa 01zLwEz34NF1ZK5fHCqcUX+iDnPpxJfiV9kelg8bfaV4mseyYSJmoIeL Subject: [FFmpeg-devel] [PATCH 3/3] avformat/wavdec: Consider AV_INPUT_BUFFER_PADDING_SIZE in set_spdif() 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" The buffer is read by using the bit reader Fixes: out of array read Fixes: 27539/clusterfuzz-testcase-minimized-ffmpeg_dem_WAV_fuzzer-5650565572591616 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavformat/wavdec.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavformat/wavdec.c b/libavformat/wavdec.c index df6030a42d..ef25544b1d 100644 --- a/libavformat/wavdec.c +++ b/libavformat/wavdec.c @@ -72,7 +72,7 @@ static void set_spdif(AVFormatContext *s, WAVDemuxContext *wav) int ret = ffio_ensure_seekback(s->pb, len); if (ret >= 0) { - uint8_t *buf = av_malloc(len); + uint8_t *buf = av_malloc(len + AV_INPUT_BUFFER_PADDING_SIZE); if (!buf) { ret = AVERROR(ENOMEM); } else {