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 02CD6454B7 for ; Thu, 1 Jun 2023 22:26:29 +0000 (UTC) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id 384B368C2D8; Fri, 2 Jun 2023 01:26:12 +0300 (EEST) Received: from relay3-d.mail.gandi.net (relay3-d.mail.gandi.net [217.70.183.195]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id EEEA668BF62 for ; Fri, 2 Jun 2023 01:26:04 +0300 (EEST) X-GND-Sasl: michael@niedermayer.cc Received: by mail.gandi.net (Postfix) with ESMTPSA id 33CE860004 for ; Thu, 1 Jun 2023 22:26:03 +0000 (UTC) From: Michael Niedermayer To: FFmpeg development discussions and patches Date: Fri, 2 Jun 2023 00:26:01 +0200 Message-Id: <20230601222601.12631-3-michael@niedermayer.cc> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230601222601.12631-1-michael@niedermayer.cc> References: <20230601222601.12631-1-michael@niedermayer.cc> Subject: [FFmpeg-devel] [PATCH 3/3] avcodec/mpeg4videodec: more unsigned in amv computation 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: signed integer overflow: -2147483648 + -1048576 cannot be represented in type 'int' Fixes: 59365/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MPEG4_fuzzer-642654923954585 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/mpeg4videodec.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/mpeg4videodec.c b/libavcodec/mpeg4videodec.c index d456e5dd11..72c8ad3048 100644 --- a/libavcodec/mpeg4videodec.c +++ b/libavcodec/mpeg4videodec.c @@ -861,7 +861,7 @@ static inline int get_amv(Mpeg4DecContext *ctx, int n) for (y = 0; y < 16; y++) { int v; - v = mb_v + dy * y; + v = mb_v + (unsigned)dy * y; // FIXME optimize for (x = 0; x < 16; x++) { sum += v >> shift; -- 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".