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 6DBD343BCF for ; Fri, 22 Jul 2022 06:56:01 +0000 (UTC) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id 61EE968B6E2; Fri, 22 Jul 2022 09:55:59 +0300 (EEST) Received: from vie01a-dmta-at01-3.mx.upcmail.net (vie01a-dmta-at01-3.mx.upcmail.net [62.179.121.147]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id 6A1C168B205 for ; Fri, 22 Jul 2022 09:55:53 +0300 (EEST) Received: from [172.31.216.235] (helo=vie01a-pemc-psmtp-pe12.mail.upcmail.net) by vie01a-dmta-at01.mx.upcmail.net with esmtp (Exim 4.92) (envelope-from ) id 1oEmZk-001rRP-0J for ffmpeg-devel@ffmpeg.org; Fri, 22 Jul 2022 08:55:52 +0200 Received: from ren-mail-psmtp-mg01. ([80.109.253.241]) by vie01a-pemc-psmtp-pe12.mail.upcmail.net with ESMTP id EmZjox5Zi8s8UEmZjoijZc; Fri, 22 Jul 2022 08:55:51 +0200 Received: from localhost ([213.47.68.29]) by ren-mail-psmtp-mg01. with ESMTP id EmZjotUDiOPqFEmZjoiE6n; Fri, 22 Jul 2022 08:55:51 +0200 X-Env-Mailfrom: michael@niedermayer.cc X-Env-Rcptto: ffmpeg-devel@ffmpeg.org X-SourceIP: 213.47.68.29 X-CNFS-Analysis: v=2.4 cv=OcX7sjfY c=1 sm=1 tr=0 ts=62da49f7 a=2hcxjKEKjp0CzLx6oWAm4g==:117 a=2hcxjKEKjp0CzLx6oWAm4g==:17 a=MKtGQD3n3ToA:10 a=1oJP67jkp3AA:10 a=GEAsPZ9sns4A:10 a=NEAV23lmAAAA:8 a=QANlSW8LVmXkupGV7QwA:9 From: Michael Niedermayer To: FFmpeg development discussions and patches Date: Fri, 22 Jul 2022 08:55:49 +0200 Message-Id: <20220722065550.5431-1-michael@niedermayer.cc> X-Mailer: git-send-email 2.17.1 X-CMAE-Envelope: MS4wfOie1r+9/GksJKBzlGOzSKTyebX2YSG36S0yFysfPBRAmDU8TcMB5YzpMOT5pm5aGDLgkZNIPUaPm4WebkJJ34Nhpu8BgLDXG4gxuf2aHHU6mEQ3ChYr N//osVpz1Hqn00oIsL85IQJIE5DTMZuuQ6ds5DrNGvI6V1r9+6r732mIs4q7AeWGQkg4ObxCzxftvA== Subject: [FFmpeg-devel] [PATCH 1/2] avcodec/tiff: Check tile_length and tile_width 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 0 Fixes: 49235/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TIFF_fuzzer-5495613847896064 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/tiff.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/libavcodec/tiff.c b/libavcodec/tiff.c index 349df14035..329eafe494 100644 --- a/libavcodec/tiff.c +++ b/libavcodec/tiff.c @@ -965,6 +965,9 @@ static int dng_decode_tiles(AVCodecContext *avctx, AVFrame *frame, int pos_x = 0, pos_y = 0; int ret; + if (s->tile_width <= 0 || s->tile_length <= 0) + return AVERROR_INVALIDDATA; + has_width_leftover = (s->width % s->tile_width != 0); has_height_leftover = (s->height % s->tile_length != 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".