From patchwork Sun Nov 15 01:29:46 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: James Almer X-Patchwork-Id: 23636 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 AA09844A696 for ; Sun, 15 Nov 2020 03:30:13 +0200 (EET) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id 855E068B96A; Sun, 15 Nov 2020 03:30:13 +0200 (EET) X-Original-To: ffmpeg-devel@ffmpeg.org Delivered-To: ffmpeg-devel@ffmpeg.org Received: from mail-qv1-f65.google.com (mail-qv1-f65.google.com [209.85.219.65]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id CFF1B68AF5D for ; Sun, 15 Nov 2020 03:30:05 +0200 (EET) Received: by mail-qv1-f65.google.com with SMTP id y11so6983401qvu.10 for ; Sat, 14 Nov 2020 17:30:05 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:subject:date:message-id:mime-version :content-transfer-encoding; bh=6fwFkNH6tQL+KywS2oPT6rKalIkXho1E5MwlxvxOGbA=; b=TlFEh4l0HTy31G4Psl2q9FIKut8pchYiFXm3ZGf/HSRHfg4ymClzO6wj1ZstIU9UYa HpGnnPE1p5ajN7dr5tAot9FCjSRTuRE4eXxQm9Z+o9sYU6sI3xUk9shz/yaYW6RGCH5O m5/BrDCRRoG8c79dib/agpkLLWJORiXI5Ys3SjxGhA+LRYRSXgM6b4tv8a2QndT1aUSF GuWZJ35V+xjdAe6Z5rZsJsviJnNzd6f9XPHpbBAAnEaINe0RxDemsFoScPKW3W+GT0U0 rsWQ5ae0ymFANKbTedYIyErIEmds6ajSEyjIhF30Moq4++Tn66tSI55+nmudAYbfBlds iCEw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:date:message-id:mime-version :content-transfer-encoding; bh=6fwFkNH6tQL+KywS2oPT6rKalIkXho1E5MwlxvxOGbA=; b=gw8M4x5wCs5p4EIGuGGECf1SWNtU8RIkFAHeAmyZD9EtWnZosmZ+73k0qrfucaV1gU NNh8BEUAq60REfl/0989pVc3AVZed2VmEL6c/IJsSSdc79ENV8Vkmj1qZGx9gPP7Ai6i HYO30XWYeZGLyc2YLk1X9XPBN5xGDF/yQ+7akCPD4CFIrBufa37pAf/RM7j30yFkpGc3 JcniFIRUJ+mSabz1BbKlHCnI4vV5Bes2jGHEMH0chCJl1E6PxaDo03K37ewarSuq6l2R yC70JzrqxX9UMB/gF8339usPzK042ORMMl7Bu55q/iowHnbxOkL2QpNZB6Clvc6w4MNR 9Mhw== X-Gm-Message-State: AOAM532/o8F0Dmoh2IJ2mvtQMQsqDAuykMW/+1CdV8RDVkqiGLDafJaQ lquAZwE2aK67lYem05QzXKgxP1RihbU= X-Google-Smtp-Source: ABdhPJxnZDWWlvaiq7nS2lbxg8j/BmhwE8P5PszOHsKAtALUzBLQWeQAardvgY7yzpXqKqrriWkAkA== X-Received: by 2002:a0c:b996:: with SMTP id v22mr7373818qvf.60.1605403804243; Sat, 14 Nov 2020 17:30:04 -0800 (PST) Received: from localhost.localdomain ([181.23.74.184]) by smtp.gmail.com with ESMTPSA id f202sm9186015qke.112.2020.11.14.17.30.03 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 14 Nov 2020 17:30:03 -0800 (PST) From: James Almer To: ffmpeg-devel@ffmpeg.org Date: Sat, 14 Nov 2020 22:29:46 -0300 Message-Id: <20201115012948.1201-1-jamrial@gmail.com> X-Mailer: git-send-email 2.29.2 MIME-Version: 1.0 Subject: [FFmpeg-devel] [PATCH 1/3] tools/target_dec_fuzzer: Call avcodec_flush_buffers() in a fuzzer choosen pattern 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 Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" From: Michael Niedermayer This should increase coverage Signed-off-by: Michael Niedermayer Signed-off-by: James Almer --- tools/target_dec_fuzzer.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/tools/target_dec_fuzzer.c b/tools/target_dec_fuzzer.c index 4eb59bd296..11530cbf79 100644 --- a/tools/target_dec_fuzzer.c +++ b/tools/target_dec_fuzzer.c @@ -110,6 +110,7 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) { const AVPacket *avpkt) = NULL; AVCodecParserContext *parser = NULL; uint64_t keyframes = 0; + uint64_t flushpattern = -1; AVDictionary *opts = NULL; if (!c) { @@ -239,6 +240,7 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) { ctx->request_channel_layout = bytestream2_get_le64(&gbc); ctx->idct_algo = bytestream2_get_byte(&gbc) % 25; + flushpattern = bytestream2_get_le64(&gbc); if (flags & 0x20) { switch (ctx->codec_id) { @@ -332,6 +334,10 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) { av_packet_move_ref(&avpkt, &parsepkt); } + if (!(flushpattern & 7)) + avcodec_flush_buffers(ctx); + flushpattern = (flushpattern >> 3) + (flushpattern << 61); + // Iterate through all data while (avpkt.size > 0 && it++ < maxiteration) { av_frame_unref(frame);