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[79.124.17.100]) by mx.google.com with ESMTP id w4si2626011wrl.88.2020.06.18.05.27.05; Thu, 18 Jun 2020 05:27:06 -0700 (PDT) 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 CBFE468B752; Thu, 18 Jun 2020 15:27:02 +0300 (EEST) X-Original-To: ffmpeg-devel@ffmpeg.org Delivered-To: ffmpeg-devel@ffmpeg.org Received: from vie01a-dmta-pe01-1.mx.upcmail.net (vie01a-dmta-pe01-1.mx.upcmail.net [62.179.121.154]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id B2A4C68B752 for ; Thu, 18 Jun 2020 15:26:55 +0300 (EEST) Received: from [172.31.216.235] (helo=vie01a-pemc-psmtp-pe12.mail.upcmail.net) by vie01a-dmta-pe01.mx.upcmail.net with esmtp (Exim 4.92) (envelope-from ) id 1jltXs-000AKM-0H for ffmpeg-devel@ffmpeg.org; Thu, 18 Jun 2020 14:21:28 +0200 Received: from localhost ([213.47.68.29]) by vie01a-pemc-psmtp-pe12.mail.upcmail.net with ESMTP id ltWujwUuU6Jy6ltWujRuKl; Thu, 18 Jun 2020 14:20:28 +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=31xsCM55cPVQV3pEuI8A:9 a=+jEqtf1s3R9VXZ0wqowq2kgwd+I=:19 a=1fhp2MxaeJtTNGEnv6mo:22 a=Z5ABNNGmrOfJ6cZ5bIyy:22 a=SsAZrZ5W_gNWK9tOzrEV:22 From: Michael Niedermayer To: FFmpeg development discussions and patches Date: Thu, 18 Jun 2020 14:20:24 +0200 Message-Id: <20200618122026.24534-2-michael@niedermayer.cc> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200618122026.24534-1-michael@niedermayer.cc> References: <20200618122026.24534-1-michael@niedermayer.cc> X-CMAE-Envelope: MS4wfGGMK20tfpl030lNKln8gTSuPqbYz9GrgGDQUP/dp7rIW7MxxzdTm2Vrie3c/ELSO0rc/8+cNvCczgKa0HGMGR9uA+Twc2faDhV2OxlqsCS/QjT5f0xZ IeK1MbDViQ+Rslw+4e1vy/1pHNYciHT3Pr1bESzmBbUO4KG/SwrOC0Lx Subject: [FFmpeg-devel] [PATCH 2/4] avutil/avsscanf: Add () to avoid integer overflow in scanexp() 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" X-TUID: Ypq7AZ8on5F3 Content-Length: 1678 Fixes: signed integer overflow: 2147483610 + 52 cannot be represented in type 'int' Fixes: 23260/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_PBM_fuzzer-5187871274434560 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavutil/avsscanf.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/libavutil/avsscanf.c b/libavutil/avsscanf.c index 1c85412fd4..850c117940 100644 --- a/libavutil/avsscanf.c +++ b/libavutil/avsscanf.c @@ -229,9 +229,9 @@ static long long scanexp(FFFILE *f, int pok) return LLONG_MIN; } for (x=0; c-'0'<10U && x