From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ffbox0-bg.mplayerhq.hu (ffbox0-bg.ffmpeg.org [79.124.17.100]) by master.gitmailbox.com (Postfix) with ESMTPS id 7A04B4C690 for ; Thu, 8 May 2025 21:57:51 +0000 (UTC) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id C3A5768BC73; Fri, 9 May 2025 00:57:46 +0300 (EEST) Received: from relay6-d.mail.gandi.net (relay6-d.mail.gandi.net [217.70.183.198]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id 7668568BC73 for ; Fri, 9 May 2025 00:57:40 +0300 (EEST) Received: by mail.gandi.net (Postfix) with ESMTPSA id BBCFA4327A for ; Thu, 8 May 2025 21:57:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=niedermayer.cc; s=gm1; t=1746741459; 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=By9LTFnDKeg9oWvpR0uGGqRDuIuSbjDW4uW6SVbP1mg=; b=HIuStQAk964BHgbiZGCHxnqBQm4ZKVMc2XWD3sTqgNE4+t2Jmg41QaZgYgkhc8wPv+fWZJ L8y67Yw1pGj8s8BYU3KgXerTqPidm5UBMeedL3U5xIQckJtj2IZ+LOO/KrH4KUexs/bPiZ ZW9Hnu2jhzYgMPzjf+NJlExGiRQRTN1Lep5itn5p0d+5nru3mS4KX6+jt4ZopfLzFafod0 5qjx3mWOz7OtiaLVOortZygH0KRz3U9S41f5E5OiUp+gTw0VYUfoBtsmKqzkPYJjL5+uec 9/rU1li5Z+onCzy4CfAhg+h5je1rlGfpZF9cdsIEmx+Bb9cktN22iuHSrc9s7g== From: Michael Niedermayer To: FFmpeg development discussions and patches Date: Thu, 8 May 2025 23:57:32 +0200 Message-ID: <20250508215738.3582069-1-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: gggruggvucftvghtrhhoucdtuddrgeefvddrtddtgddvledtkeejucetufdoteggodetrfdotffvucfrrhhofhhilhgvmecuifetpfffkfdpucggtfgfnhhsuhgsshgtrhhisggvnecuuegrihhlohhuthemuceftddunecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenfghrlhcuvffnffculdduhedmnecujfgurhephffvufffkffoggfgsedtkeertdertddtnecuhfhrohhmpefoihgthhgrvghlucfpihgvuggvrhhmrgihvghruceomhhitghhrggvlhesnhhivgguvghrmhgrhigvrhdrtggtqeenucggtffrrghtthgvrhhnpeejffeufeffveevtdfhueevtdefjeetheeiteffheetgedvudduvedtffefjefhleenucffohhmrghinhepghhithhhuhgsrdgtohhmnecukfhppeeguddrieeirdeijedruddufeenucevlhhushhtvghrufhiiigvpedtnecurfgrrhgrmhepihhnvghtpeeguddrieeirdeijedruddufedphhgvlhhopehlohgtrghlhhhoshhtpdhmrghilhhfrhhomhepmhhitghhrggvlhesnhhivgguvghrmhgrhigvrhdrtggtpdhnsggprhgtphhtthhopedupdhrtghpthhtohepfhhfmhhpvghgqdguvghvvghlsehffhhmphgvghdrohhrgh X-GND-Sasl: michael@niedermayer.cc Subject: [FFmpeg-devel] [PATCH 1/7] avcodec/mmvideo: fix paltte index 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: 391935573/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MMVIDEO_fuzzer-4655048979709952 Fixes: out of array access Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/mmvideo.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/mmvideo.c b/libavcodec/mmvideo.c index 7313507debc..2a0c855992e 100644 --- a/libavcodec/mmvideo.c +++ b/libavcodec/mmvideo.c @@ -91,7 +91,7 @@ static void mm_decode_pal(MmContext *s) int start = bytestream2_get_le16(&s->gb); int count = bytestream2_get_le16(&s->gb); for (int i = 0; i < count; i++) - s->palette[start+i] = 0xFFU << 24 | (bytestream2_get_be24(&s->gb) << 2); + s->palette[(start+i)&0xFF] = 0xFFU << 24 | (bytestream2_get_be24(&s->gb) << 2); } /** -- 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".