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 9BAB1402FF for ; Wed, 16 Nov 2022 23:32:33 +0000 (UTC) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id 9C99268BC39; Thu, 17 Nov 2022 01:32:30 +0200 (EET) Received: from relay9-d.mail.gandi.net (relay9-d.mail.gandi.net [217.70.183.199]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id 1170C68B71E for ; Thu, 17 Nov 2022 01:32:23 +0200 (EET) Received: (Authenticated sender: michael@niedermayer.cc) by mail.gandi.net (Postfix) with ESMTPSA id 98052FF806 for ; Wed, 16 Nov 2022 23:32:21 +0000 (UTC) From: Michael Niedermayer To: FFmpeg development discussions and patches Date: Thu, 17 Nov 2022 00:32:18 +0100 Message-Id: <20221116233220.5183-1-michael@niedermayer.cc> X-Mailer: git-send-email 2.17.1 Subject: [FFmpeg-devel] [PATCH 1/3] avcodec/bonk: Use unsigned in predictor_init_state() to avoid undefined behavior 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: -5010 * -717450 cannot be represented in type 'int' Fixes: 53370/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_BONK_fuzzer-4945644204195840 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/bonk.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/libavcodec/bonk.c b/libavcodec/bonk.c index ebe8e46d70..df5a80b06e 100644 --- a/libavcodec/bonk.c +++ b/libavcodec/bonk.c @@ -277,10 +277,10 @@ static int predictor_calc_error(int *k, int *state, int order, int error) return x; } -static void predictor_init_state(int *k, int *state, int order) +static void predictor_init_state(int *k, unsigned *state, int order) { for (int i = order - 2; i >= 0; i--) { - int x = state[i]; + unsigned x = state[i]; for (int j = 0, p = i + 1; p < order; j++, p++) { int tmp = x + shift_down(k[j] * state[p], LATTICE_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".