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 7D76E4BB25 for ; Wed, 23 Jul 2025 11:46:12 +0000 (UTC) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.ffmpeg.org (Postfix) with ESMTP id 57C1168D79D; Wed, 23 Jul 2025 14:45:53 +0300 (EEST) Received: from relay15.mail.gandi.net (relay15.mail.gandi.net [217.70.178.235]) by ffbox0-bg.ffmpeg.org (Postfix) with ESMTPS id 36F5D68D696 for ; Wed, 23 Jul 2025 14:45:44 +0300 (EEST) Received: by mail.gandi.net (Postfix) with ESMTPSA id 91E7D44284 for ; Wed, 23 Jul 2025 11:45:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=niedermayer.cc; s=gm1; t=1753271143; 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: in-reply-to:in-reply-to:references:references; bh=Bk1+MOIvt/gCOSTEVIk6cJykjPq0WW1092SDnvsgtEY=; b=HOXOERjZH43a3E21bC2vkzYL6He6oW7wj2hxlVz2ubKA5NtKyGnkotSg03CSSazv9UJ8vO IDLId90+YPxgGWknO5LCTzsZYihG6z/COGNDG9qcsBekuNplmMihbqoqZs4mdVv9It/RaJ ejbaI56/KxSa98ilXLOAh4YKweKRNyfuZmQlNc/2gbiiE29rLKn+Qx5QrQNkY0wlwKfrfi 0hIkZqWwq6Eocs8KqpwkPUvL8hvVMhOg26Q2ROyX+62SqPiVNIeQiWUQ0Af6ADORkTiHQG OkPH1cTnTXiD07DBrhspAGFiXa72eLZn079Yb0v+dBI1kKbMO+jARviFl/vkLw== From: Michael Niedermayer To: FFmpeg development discussions and patches Date: Wed, 23 Jul 2025 13:45:39 +0200 Message-ID: <20250723114540.151693-3-michael@niedermayer.cc> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250723114540.151693-1-michael@niedermayer.cc> References: <20250723114540.151693-1-michael@niedermayer.cc> MIME-Version: 1.0 X-GND-State: clean X-GND-Score: -85 X-GND-Cause: gggruggvucftvghtrhhoucdtuddrgeeffedrtdefgdejjeeilecutefuodetggdotefrodftvfcurfhrohhfihhlvgemucfitefpfffkpdcuggftfghnshhusghstghrihgsvgenuceurghilhhouhhtmecufedtudenucesvcftvggtihhpihgvnhhtshculddquddttddmnegfrhhlucfvnfffucdludehmdenucfjughrpefhvffufffkofgjfhgggfestdekredtredttdenucfhrhhomhepofhitghhrggvlhcupfhivgguvghrmhgrhigvrhcuoehmihgthhgrvghlsehnihgvuggvrhhmrgihvghrrdgttgeqnecuggftrfgrthhtvghrnhepgeejhfetgefhgfeludegvdduvdffgeefvddtheetlefhueeitdevffevfeehhefgnecuffhomhgrihhnpehgihhthhhusgdrtghomhenucfkphepgedurdeiiedrieehrddujeeinecuvehluhhsthgvrhfuihiivgeptdenucfrrghrrghmpehinhgvthepgedurdeiiedrieehrddujeeipdhhvghloheplhhotggrlhhhohhsthdpmhgrihhlfhhrohhmpehmihgthhgrvghlsehnihgvuggvrhhmrgihvghrrdgttgdpnhgspghrtghpthhtohepuddprhgtphhtthhopehffhhmphgvghdquggvvhgvlhesfhhfmhhpvghgrdhorhhg Subject: [FFmpeg-devel] [PATCH 3/4] avformat/mxfdec: Ensure klv->key is initialized 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: read of uninitialized memory Fixes: 391916474/clusterfuzz-testcase-minimized-ffmpeg_dem_MXF_fuzzer-4935250956845056 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavformat/mxfdec.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/libavformat/mxfdec.c b/libavformat/mxfdec.c index 0eed13d850d..184e97256cd 100644 --- a/libavformat/mxfdec.c +++ b/libavformat/mxfdec.c @@ -491,7 +491,9 @@ static int klv_read_packet(MXFContext *mxf, KLVPacket *klv, AVIOContext *pb) return AVERROR_INVALIDDATA; memcpy(klv->key, mxf_klv_key, 4); - avio_read(pb, klv->key + 4, 12); + int ret = ffio_read_size(pb, klv->key + 4, 12); + if (ret < 0) + return ret; length = klv_decode_ber_length(pb, &llen); if (length < 0) return length; -- 2.50.1 _______________________________________________ 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".