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[79.124.17.100]) by mx.google.com with ESMTP id hp33si318766ejc.663.2022.02.03.16.59.22; Thu, 03 Feb 2022 16:59:24 -0800 (PST) Received-SPF: pass (google.com: domain of ffmpeg-devel-bounces@ffmpeg.org designates 79.124.17.100 as permitted sender) client-ip=79.124.17.100; Authentication-Results: mx.google.com; spf=pass (google.com: domain of ffmpeg-devel-bounces@ffmpeg.org designates 79.124.17.100 as permitted sender) smtp.mailfrom=ffmpeg-devel-bounces@ffmpeg.org Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id D426668AB7C; Fri, 4 Feb 2022 02:59:18 +0200 (EET) X-Original-To: ffmpeg-devel@ffmpeg.org Delivered-To: ffmpeg-devel@ffmpeg.org Received: from vie01a-dmta-pe02-3.mx.upcmail.net (vie01a-dmta-pe02-3.mx.upcmail.net [62.179.121.159]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id 4292D68A7BB for ; Fri, 4 Feb 2022 02:59:12 +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 1nFmwR-003z4T-0h for ffmpeg-devel@ffmpeg.org; Fri, 04 Feb 2022 01:59:11 +0100 Received: from localhost ([213.47.68.29]) by vie01a-pemc-psmtp-pe12.mail.upcmail.net with ESMTP id FmvTniOcESgGFFmvTnmRwH; Fri, 04 Feb 2022 01:58:11 +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=f8Q2+96M 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=NEAV23lmAAAA:8 a=1qGDCK9oyWeIli-JxKgA:9 From: Michael Niedermayer To: FFmpeg development discussions and patches Date: Fri, 4 Feb 2022 01:58:10 +0100 Message-Id: <20220204005811.5459-1-michael@niedermayer.cc> X-Mailer: git-send-email 2.17.1 X-CMAE-Envelope: MS4wfGaO3Bu1g5qsh3Q+PRliYcfDjPwx+RnpIYpNK2YOUaa9aEhnYGXefGdpSf0WDq3p0E76KMdj3czJuXOaAD1Q1oCkpmWAi+YHCy3VKbICX3pY6QrPtrxv mzfpwq0VRGLV0+IBYbKTD+YwyCze8hmvJBWFgL+ba5sgS1eQ4P+EvIzH Subject: [FFmpeg-devel] [PATCH 1/2] avformat/matroskadec: Fix infinite loop with bz decompression X-BeenThere: ffmpeg-devel@ffmpeg.org X-Mailman-Version: 2.1.29 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" X-TUID: VHqlMZK2GCZU Fixes: Infinite loop Fixes: 43932/clusterfuzz-testcase-minimized-ffmpeg_dem_MATROSKA_fuzzer-6175167573786624 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavformat/matroskadec.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavformat/matroskadec.c b/libavformat/matroskadec.c index d165f6ab90..5a9acfb247 100644 --- a/libavformat/matroskadec.c +++ b/libavformat/matroskadec.c @@ -1742,7 +1742,7 @@ static int matroska_decode_buffer(uint8_t **buf, int *buf_size, case MATROSKA_TRACK_ENCODING_COMP_BZLIB: { bz_stream bzstream = { 0 }; - if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK) + if (!pkt_size || BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK) return -1; bzstream.next_in = data; bzstream.avail_in = isize;