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 ESMTP id 4670E44153 for ; Sun, 27 Nov 2022 22:34:52 +0000 (UTC) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id EE17A68BBB0; Mon, 28 Nov 2022 00:34:43 +0200 (EET) Received: from relay1-d.mail.gandi.net (relay1-d.mail.gandi.net [217.70.183.193]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id CD64668AEE0 for ; Mon, 28 Nov 2022 00:34:37 +0200 (EET) Received: (Authenticated sender: michael@niedermayer.cc) by mail.gandi.net (Postfix) with ESMTPSA id 02203240004 for ; Sun, 27 Nov 2022 22:34:36 +0000 (UTC) From: Michael Niedermayer To: FFmpeg development discussions and patches Date: Sun, 27 Nov 2022 23:34:34 +0100 Message-Id: <20221127223435.8362-2-michael@niedermayer.cc> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20221127223435.8362-1-michael@niedermayer.cc> References: <20221127223435.8362-1-michael@niedermayer.cc> Subject: [FFmpeg-devel] [PATCH 2/3] avcodec/vqcdec: Check width & 15 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 MIME-Version: 1.0 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: Various parts of the code assume that width can be divided by various powers of 2 without rounding Fixes: out of array access Fixes: 53623/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_VQC_fuzzer-6209269924233216 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/vqcdec.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/libavcodec/vqcdec.c b/libavcodec/vqcdec.c index 18cd99462e..c3bce87974 100644 --- a/libavcodec/vqcdec.c +++ b/libavcodec/vqcdec.c @@ -71,6 +71,9 @@ static av_cold int vqc_decode_init(AVCodecContext * avctx) static AVOnce init_static_once = AV_ONCE_INIT; VqcContext *s = avctx->priv_data; + if (avctx->width & 15) + return AVERROR_PATCHWELCOME; + s->vectors = av_malloc((avctx->width * avctx->height * 3) / 2); if (!s->vectors) return AVERROR(ENOMEM); -- 2.17.1 _______________________________________________ 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".