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identity=mailfrom; envelope-from="adr@SDF.ORG"; helo=mx.sdf.org; client-ip=205.166.94.24 Received: from mx.sdf.org (mx.sdf.org [205.166.94.24]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by tb-mx0.topicbox.com (Postfix) with ESMTPS for <9fans@9fans.net>; Tue, 13 Jul 2021 05:40:13 -0400 (EDT) (envelope-from adr@SDF.ORG) Received: from sdf.org (IDENT:adr@sdf.org [205.166.94.16]) by mx.sdf.org (8.15.2/8.14.5) with ESMTPS id 16D9eCPi012386 (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256 bits) verified NO) for <9fans@9fans.net>; Tue, 13 Jul 2021 09:40:12 GMT Received: from localhost (adr@localhost) by sdf.org (8.15.2/8.12.8/Submit) with ESMTP id 16D9eC59000991 for <9fans@9fans.net>; Tue, 13 Jul 2021 09:40:12 GMT Date: Tue, 13 Jul 2021 09:40:11 +0000 (UTC) To: 9fans <9fans@9fans.net> Subject: Re: [9fans] pngread: alloc chunk's length In-Reply-To: Message-ID: <7c354c3b-899-26d-01e-e69abde0b322@SDF.ORG> References: <28C2E353AF3CC6A064D8A1A403C1E1C2@eigenstate.org> <1fbcd31c-c6f-7991-951-3f1daae8d895@SDF.ORG> <6c633170-ba92-52f4-5244-28fa6c7302b@SDF.ORG> <8c4d60f0-7ed1-aa10-239f-6267c75cd33a@SDF.ORG> MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8"; format="flowed" Topicbox-Policy-Reasoning: allow: sender is a member Topicbox-Message-UUID: 55aea85a-e3be-11eb-831f-df53378012e7 Archived-At: =?UTF-8?B?PGh0dHBzOi8vOWZhbnMudG9waWNib3guY29tL2dyb3Vwcy85?= =?UTF-8?B?ZmFucy9UNGE3MTRlZDE0YzUwNzY3YS1NMWM3NGMzODYyNWY1YTViMTEwNzEw?= =?UTF-8?B?NDNlPg==?= From: "adr via 9fans" <9fans@9fans.net> List-Help: List-Id: "9fans" <9fans.9fans.net> List-Post: List-Software: Topicbox v0 List-Subscribe: Precedence: list Reply-To: 9fans <9fans@9fans.net> Content-Transfer-Encoding: quoted-printable List-Unsubscribe: , Topicbox-Delivery-ID: 2:9fans:437d30aa-c441-11e9-8a57-d036212d11b0:522be890-2105-11eb-b15e-8d699134e1fa:M1c74c38625f5a5b11071043e:1:weYHUJrrNrgrI4sGiEfeX_XLjXaSKBo2WrHl8D-VE3Y On Tue, 13 Jul 2021, hiro wrote: > are you saying this is a purely synthetic error, it doesn't happen in > the wild bec. these sizes are normally more sane? No, no... you got it wrong. You have to follow the specification of the format, unless you want to have surprises like this one. The file you'll obtain with the example I gave you will be as correct as any other png file. Regards, adr. ------------------------------------------ 9fans: 9fans Permalink: https://9fans.topicbox.com/groups/9fans/T4a714ed14c50767a-M1c74c= 38625f5a5b11071043e Delivery options: https://9fans.topicbox.com/groups/9fans/subscription