From patchwork Fri Oct 30 21:52:06 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Niedermayer X-Patchwork-Id: 23293 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 0E5CB44AC7E for ; Fri, 30 Oct 2020 23:53:16 +0200 (EET) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id EBF2968AA4D; Fri, 30 Oct 2020 23:53:15 +0200 (EET) X-Original-To: ffmpeg-devel@ffmpeg.org Delivered-To: ffmpeg-devel@ffmpeg.org Received: from vie01a-dmta-pe05-2.mx.upcmail.net (vie01a-dmta-pe05-2.mx.upcmail.net [84.116.36.12]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id 4F344680890 for ; Fri, 30 Oct 2020 23:53:08 +0200 (EET) 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 1kYcKa-0007w3-0J for ffmpeg-devel@ffmpeg.org; Fri, 30 Oct 2020 22:53:08 +0100 Received: from localhost ([213.47.68.29]) by vie01a-pemc-psmtp-pe12.mail.upcmail.net with ESMTP id YcJckUgHgIr7GYcJckABd3; Fri, 30 Oct 2020 22:52:08 +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=QN4WuTDL 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=g3nV5xVP7I5ZlGZgancA:9 a=1fhp2MxaeJtTNGEnv6mo:22 a=Z5ABNNGmrOfJ6cZ5bIyy:22 a=UDnyf2zBuKT2w-IlGP_r:22 From: Michael Niedermayer To: FFmpeg development discussions and patches Date: Fri, 30 Oct 2020 22:52:06 +0100 Message-Id: <20201030215206.1629-5-michael@niedermayer.cc> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201030215206.1629-1-michael@niedermayer.cc> References: <20201030215206.1629-1-michael@niedermayer.cc> X-CMAE-Envelope: MS4wfEj6cRkGv137QYgkqVCOtBUZsTXzFwB6DicEzCI1tJektOjlXSyL+xEnuEfYXcEXQw1F0WgoYi8BoqDK9cdBUCjOBxrzMstC6O0uAted2qj/emjENtJE GW9rHmtpVn78qkLM4JeBVSvZqx8d1244uR4gW4/4Sc3dhtAavd3GePVI Subject: [FFmpeg-devel] [PATCH 5/5] avformat/rmdec: Check remaining space in debug av_log() loop 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 (long -> 2 ms) Fixes: 26709/clusterfuzz-testcase-minimized-ffmpeg_dem_IVR_fuzzer-5665833403285504 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavformat/rmdec.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/libavformat/rmdec.c b/libavformat/rmdec.c index 3606b74a6e..9e954108f9 100644 --- a/libavformat/rmdec.c +++ b/libavformat/rmdec.c @@ -1289,8 +1289,11 @@ static int ivr_read_header(AVFormatContext *s) int j; av_log(s, AV_LOG_DEBUG, "%s = '0x", key); - for (j = 0; j < len; j++) + for (j = 0; j < len; j++) { + if (avio_feof(pb)) + return AVERROR_INVALIDDATA; av_log(s, AV_LOG_DEBUG, "%X", avio_r8(pb)); + } av_log(s, AV_LOG_DEBUG, "'\n"); } else if (len == 4 && type == 3 && !strncmp(key, "Duration", tlen)) { st->duration = avio_rb32(pb);