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 ABE1146FE0 for ; Tue, 25 Jul 2023 00:46:29 +0000 (UTC) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id A7D7A68C81B; Tue, 25 Jul 2023 03:46:18 +0300 (EEST) 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 E0DB568C6CC for ; Tue, 25 Jul 2023 03:46:11 +0300 (EEST) Received: by mail.gandi.net (Postfix) with ESMTPSA id 26BB9FF802 for ; Tue, 25 Jul 2023 00:46:10 +0000 (UTC) From: Michael Niedermayer To: FFmpeg development discussions and patches Date: Tue, 25 Jul 2023 02:46:08 +0200 Message-Id: <20230725004609.17750-2-michael@niedermayer.cc> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230725004609.17750-1-michael@niedermayer.cc> References: <20230725004609.17750-1-michael@niedermayer.cc> X-GND-Sasl: michael@niedermayer.cc Subject: [FFmpeg-devel] [PATCH 2/3] avcodec/cbs_h266_syntax_template: Check num_subpic_cols for 0 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: division by zero Fixes: 60306/clusterfuzz-testcase-minimized-ffmpeg_BSF_TRACE_HEADERS_fuzzer-5538913553612800 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/cbs_h266_syntax_template.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/libavcodec/cbs_h266_syntax_template.c b/libavcodec/cbs_h266_syntax_template.c index dce0216fbc..18ecf17e3b 100644 --- a/libavcodec/cbs_h266_syntax_template.c +++ b/libavcodec/cbs_h266_syntax_template.c @@ -1187,6 +1187,8 @@ static int FUNC(sps)(CodedBitstreamContext *ctx, RWContext *rw, } else { int num_subpic_cols = tmp_width_val / (current->sps_subpic_width_minus1[0] + 1); + if (!num_subpic_cols) + return AVERROR_INVALIDDATA; infer(sps_subpic_ctu_top_left_x[i], (i % num_subpic_cols) * (current->sps_subpic_width_minus1[0] + 1)); -- 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".