From patchwork Sun Mar 15 21:20:56 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Niedermayer X-Patchwork-Id: 18210 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 571E944B6A5 for ; Sun, 15 Mar 2020 23:22:08 +0200 (EET) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id 1D10068B0E6; Sun, 15 Mar 2020 23:22:08 +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 35CA068AF42 for ; Sun, 15 Mar 2020 23:22:01 +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 1jDahs-0004zn-0L for ffmpeg-devel@ffmpeg.org; Sun, 15 Mar 2020 22:22:00 +0100 Received: from localhost ([213.47.68.29]) by vie01a-pemc-psmtp-pe12.mail.upcmail.net with ESMTP id DagujeqJv6Jy6DagujRlL3; Sun, 15 Mar 2020 22:21:00 +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=GKl27dFK c=1 sm=1 tr=0 a=2hcxjKEKjp0CzLx6oWAm4g==:117 a=2hcxjKEKjp0CzLx6oWAm4g==:17 a=jpOVt7BSZ2e4Z31A5e1TngXxSK0=:19 a=MKtGQD3n3ToA:10 a=1oJP67jkp3AA:10 a=GEAsPZ9sns4A:10 a=ZZnuYtJkoWoA:10 a=nZOtpAppAAAA:20 a=TM_L6XwiPraImAoZx6AA: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: Sun, 15 Mar 2020 22:20:56 +0100 Message-Id: <20200315212058.6324-2-michael@niedermayer.cc> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200315212058.6324-1-michael@niedermayer.cc> References: <20200315212058.6324-1-michael@niedermayer.cc> X-CMAE-Envelope: MS4wfBxEOYRQTK0vmy49hMrzXQg+qDG0m+mCCdIl6vcRGDLek7UFBaQnSCC809cdCKfiQc2cGCXYlsYgM5hw0Iml+CSJ61P0yKbTGwFnVMenPcD3s+3J/nMV /HINZIQabl4Lj7h/TnWLQcixyDr2qa124u+MEOFNb4lVBeCu0wgfgAbk Subject: [FFmpeg-devel] [PATCH 2/4] tools/target_dec_fuzzer: Do not test AV_CODEC_FLAG2_FAST with AV_CODEC_ID_H264 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" This combination skips allocating large padding which can read out of array Fixes: 20978/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_H264_fuzzer-5746381832847360 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- tools/target_dec_fuzzer.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/target_dec_fuzzer.c b/tools/target_dec_fuzzer.c index 2487b6ca94..c835293c6a 100644 --- a/tools/target_dec_fuzzer.c +++ b/tools/target_dec_fuzzer.c @@ -202,7 +202,7 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) { if (flags & 8) ctx->err_recognition |= AV_EF_EXPLODE; } - if (flags & 0x10) + if ((flags & 0x10) && c->id != AV_CODEC_ID_H264) ctx->flags2 |= AV_CODEC_FLAG2_FAST; if (flags & 0x40)