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 8BB4A4527E for ; Mon, 16 Jan 2023 10:14:45 +0000 (UTC) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id 42E4A68BD6B; Mon, 16 Jan 2023 12:14:42 +0200 (EET) Received: from relay11.mail.gandi.net (relay11.mail.gandi.net [217.70.178.231]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id F3F7C68BBF3 for ; Mon, 16 Jan 2023 12:14:35 +0200 (EET) Received: (Authenticated sender: michael@niedermayer.cc) by mail.gandi.net (Postfix) with ESMTPSA id BD17410000A for ; Mon, 16 Jan 2023 10:14:34 +0000 (UTC) From: Michael Niedermayer To: FFmpeg development discussions and patches Date: Mon, 16 Jan 2023 11:14:33 +0100 Message-Id: <20230116101433.10989-1-michael@niedermayer.cc> X-Mailer: git-send-email 2.17.1 Subject: [FFmpeg-devel] [PATCH] avcodec/scpr3: Check bx 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: Fixes: Out of array access Fixes: 55102/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SCPR_fuzzer-4877396618903552 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/scpr3.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/libavcodec/scpr3.c b/libavcodec/scpr3.c index d9ea6af1c1..5271717ac7 100644 --- a/libavcodec/scpr3.c +++ b/libavcodec/scpr3.c @@ -1167,6 +1167,9 @@ static int decompress_p3(AVCodecContext *avctx, int run, bx = x * 16 + sx1, by = y * 16 + sy1; uint32_t clr, ptype = 0, r, g, b; + if (bx >= avctx->width) + return AVERROR_INVALIDDATA; + for (; by < y * 16 + sy2 && by < avctx->height;) { ret = decode_value3(s, 5, &s->op_model3[ptype].cntsum, s->op_model3[ptype].freqs[0], -- 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".