From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ffbox0-bg.ffmpeg.org (ffbox0-bg.ffmpeg.org [79.124.17.100]) by master.gitmailbox.com (Postfix) with ESMTPS id A753348BDA for ; Thu, 19 Jun 2025 03:04:44 +0000 (UTC) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.ffmpeg.org (Postfix) with ESMTP id 6B32968CC56; Thu, 19 Jun 2025 06:04:40 +0300 (EEST) Received: from relay7-d.mail.gandi.net (relay7-d.mail.gandi.net [217.70.183.200]) by ffbox0-bg.ffmpeg.org (Postfix) with ESMTPS id DD85368C5CA for ; Thu, 19 Jun 2025 06:04:33 +0300 (EEST) Received: by mail.gandi.net (Postfix) with ESMTPSA id 021B74393E for ; Thu, 19 Jun 2025 03:04:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=niedermayer.cc; s=gm1; t=1750302273; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=v3ZuurQaUM/UM/0NzqShjqaAZ0dhfn6wY3sXdFBV4hY=; b=FoDtroA2Q0SN/hEoQKD4PGFFQpe8rH7IY+4XGYWhGBhwx8e+hRYttJW2eWHS274v99oF6N Uv2b0fp+pcUlHWSfynQQrh2p+3pgKtEBqywhkeheNu20pQvo82kPrlcRw8DgKtRI8pMVje D6+s2RdlP9riKAyV0uQYWaQozTYfTOH0sJ5V0h+ofuwoUpbc1b4iW36xY2s4KNhPgJnAmr Hqv3nUN1cOpbnwA+wjsC/8mFY1lp4rzbZHZE7kXLkEpN8Usj3uMYuEUfhzyq3t6IAXyWPJ OX0JWTE4k8sY5U5iNpOml5AZmJULMmuoGz0knizTSyv/w2PXPEnTvpCKGlhH3w== From: Michael Niedermayer To: FFmpeg development discussions and patches Date: Thu, 19 Jun 2025 05:04:28 +0200 Message-ID: <20250619030432.2977718-1-michael@niedermayer.cc> X-Mailer: git-send-email 2.49.0 MIME-Version: 1.0 X-GND-State: clean X-GND-Score: -85 X-GND-Cause: gggruggvucftvghtrhhoucdtuddrgeeffedrtddvgdegfeelucetufdoteggodetrfdotffvucfrrhhofhhilhgvmecuifetpfffkfdpucggtfgfnhhsuhgsshgtrhhisggvnecuuegrihhlohhuthemuceftddunecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenfghrlhcuvffnffculdduhedmnecujfgurhephffvufffkffoggfgsedtkeertdertddtnecuhfhrohhmpefoihgthhgrvghlucfpihgvuggvrhhmrgihvghruceomhhitghhrggvlhesnhhivgguvghrmhgrhigvrhdrtggtqeenucggtffrrghtthgvrhhnpeejffeufeffveevtdfhueevtdefjeetheeiteffheetgedvudduvedtffefjefhleenucffohhmrghinhepghhithhhuhgsrdgtohhmnecukfhppeeguddrieeirdeijedruddufeenucevlhhushhtvghrufhiiigvpedtnecurfgrrhgrmhepihhnvghtpeeguddrieeirdeijedruddufedphhgvlhhopehlohgtrghlhhhoshhtpdhmrghilhhfrhhomhepmhhitghhrggvlhesnhhivgguvghrmhgrhigvrhdrtggtpdhnsggprhgtphhtthhopedupdhrtghpthhtohepfhhfmhhpvghgqdguvghvvghlsehffhhmphgvghdrohhrgh X-GND-Sasl: michael@niedermayer.cc Subject: [FFmpeg-devel] [PATCH 1/4] avformat/iamf_parse: Check extradata size 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 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" Archived-At: List-Archive: List-Post: Fixes: Assertion n>=0 && n<=32 failed at ./libavcodec/get_bits.h:406 Fixes: 398527871/clusterfuzz-testcase-minimized-ffmpeg_dem_IAMF_fuzzer-6602025714647040 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavformat/iamf_parse.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/libavformat/iamf_parse.c b/libavformat/iamf_parse.c index 71497876ac3..330e01733dd 100644 --- a/libavformat/iamf_parse.c +++ b/libavformat/iamf_parse.c @@ -305,6 +305,8 @@ static int update_extradata(AVCodecParameters *codecpar) skip_bits(&gb, 4); put_bits(&pb, 4, codecpar->ch_layout.nb_channels); // set channel config ret = put_bits_left(&pb); + if (ret < 0) + return AVERROR_INVALIDDATA; while (ret >= 32) { put_bits32(&pb, get_bits_long(&gb, 32)); ret -= 32; -- 2.49.0 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-request@ffmpeg.org with subject "unsubscribe".