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 018674AAA2 for ; Thu, 11 Jul 2024 23:36:38 +0000 (UTC) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id 4493568DC0C; Fri, 12 Jul 2024 02:34:43 +0300 (EEST) Received: from relay1-d.mail.gandi.net (relay1-d.mail.gandi.net [217.70.183.193]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id 51E8268DB9C for ; Fri, 12 Jul 2024 02:34:31 +0300 (EEST) Received: by mail.gandi.net (Postfix) with ESMTPSA id 9260D240003 for ; Thu, 11 Jul 2024 23:34:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=niedermayer.cc; s=gm1; t=1720740870; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=ZghPp5hGJXy8RMSWsN0kXalbmcwGFPM7a/ss2bNP7Es=; b=Ida53C6b3e3OWxPB/rqH9F2sOUtSMc504WDxkwMw+98gDff1+tytxB3Msq27aZAI5VjKWU XdNxNp9p072Z0gf+LaJsA2D7LyHXCQ4pT9Ybkgjh8yBCHbfR+tTX5185xZhM45Ki2AJ6zK 1sJ0/6ea6vrvYdpGcpcH5W7rBz/Sd50kHNqQe7klmRO3jKKtz906A20gDcOkP7hbSdgOos 8tWKG3ElksWIQ0nWTBaH2mh7YACJsQFjDakMKxaE/AiVJ3EefpiIVqcwp1Pt1zsklbeMeC HgwY5v1snvjDYFndns6EW9laPMUXi5wbYx8a40JjuQKfvG8TopzGP6HPlTon9Q== From: Michael Niedermayer To: FFmpeg development discussions and patches Date: Fri, 12 Jul 2024 01:34:10 +0200 Message-ID: <20240711233417.1896879-16-michael@niedermayer.cc> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240711233417.1896879-1-michael@niedermayer.cc> References: <20240711233417.1896879-1-michael@niedermayer.cc> MIME-Version: 1.0 X-GND-Sasl: michael@niedermayer.cc Subject: [FFmpeg-devel] [PATCH 16/22] avformat/webpenc: Check filesize in trailer 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 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: not sure this is possible Fixes: CID1604446 Overflowed constant Sponsored-by: Sovereign Tech Fund Signed-off-by: Michael Niedermayer --- libavformat/webpenc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavformat/webpenc.c b/libavformat/webpenc.c index 1c5b93e0abf..ce0d046aa94 100644 --- a/libavformat/webpenc.c +++ b/libavformat/webpenc.c @@ -190,7 +190,7 @@ static int webp_write_trailer(AVFormatContext *s) if (!ret) { filesize = avio_tell(s->pb); - if (avio_seek(s->pb, 4, SEEK_SET) == 4) { + if (filesize >= 8 && avio_seek(s->pb, 4, SEEK_SET) == 4) { avio_wl32(s->pb, filesize - 8); // Note: without the following, avio only writes 8 bytes to the file. avio_seek(s->pb, filesize, SEEK_SET); -- 2.45.2 _______________________________________________ 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".