From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from NAM10-MW2-obe.outbound.protection.outlook.com (mail-mw2nam10on2099.outbound.protection.outlook.com [40.107.94.99]) by sourceware.org (Postfix) with ESMTPS id 72A943893648 for ; Wed, 24 Jun 2020 10:24:38 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org 72A943893648 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=PTeHipcXLMFhloOIuXmEp4sdJdYNQGTHhnqnG5uUJPCI41W2qfoNV82Gg6cM/mlEWX19eyCBgqK7Bqln1I2FleuwHb95WnNmM1lavDOyhre6t0ByeIo5qz/Tt8qMwsjb1OBu5KFvhoTmpWywCy5p1Xs2ImWLS+jazDpjUS8YEiCGan8Hp6pOgRM0qwpzcRL8B3ax5//ZryitKxk/HbI1UVFlX7+h4MKU6t48Omc1EyZMFNszLG74Ho0bHKkLmNDDU9wnywmQC0+9nAgJV+Ah5SiTkhBv3tMY9rV/A3YTVwZx3r0KMT6svxcZbzoDPUthHRdqCJFs6PjQsKPXFlYBnQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=oqle7E8nlEPYYJtBS3uM1Im3GG0A+++KaVPJZ0qzelQ=; b=b7vugf0SbRnG8C1wF4XautI3hSV3ksJnJxUz5ED3KEj+q2sz4LO4FTu/2v26OU50YC+UrLX8dsx+mY+zuRwcIn8RQ7rFWN+Yyg7G6FVda6ghuVCg63VQa0Wwfp50RneCQ9+3tozpVU6yQkLs62u8E9P8VMOEpabfq6JqLjP3TejUJG3VS5o+NM4zfhmAvrgMTDInK+vujK+FsUgOS187MXDI0Z/2vVJTgbs8c2ImdSIcZaj0EV6Ea9S97j/ejtCDaBvL7EholGC0cRhYsCgCBMqvcZvLt+oSLGH9DnHk/eokPlzMQMSHhUTNu0Dzv2bpB58Eg2iiOlWVYPzpOQHmZg== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=cornell.edu; dmarc=pass action=none header.from=cornell.edu; dkim=pass header.d=cornell.edu; arc=none Received: from BN8PR04MB6163.namprd04.prod.outlook.com (2603:10b6:408:5c::27) by BN7PR04MB3956.namprd04.prod.outlook.com (2603:10b6:406:c2::17) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3109.22; Wed, 24 Jun 2020 10:24:36 +0000 Received: from BN8PR04MB6163.namprd04.prod.outlook.com ([fe80::5146:e726:8398:9ca7]) by BN8PR04MB6163.namprd04.prod.outlook.com ([fe80::5146:e726:8398:9ca7%3]) with mapi id 15.20.3109.027; Wed, 24 Jun 2020 10:24:36 +0000 Subject: Re: ImageMagick maybe broken by libgs9 upgrade To: cygwin@cygwin.com References: <241354771.1752406.1592876221936.ref@mail.yahoo.com> <241354771.1752406.1592876221936@mail.yahoo.com> <92b51d45-55b5-33e1-c1c7-883094b6b09b@cornell.edu> <134f371b-8989-4ed7-2209-acc486960d65@cornell.edu> <0dd00cea6dd675142ca617d2caf5d818@mhoenicka.de> <3d65999c-c82c-0b75-925b-d799a7e8f98c@gmail.com> <18a9c001-03cc-1538-99aa-7ea87630abe5@cornell.edu> <6744da4c-ed95-ca9b-3e07-2adc7ea9f36f@gmail.com> From: Ken Brown Message-ID: <094cb004-e88e-4b4c-89ce-e8c8791c3f9e@cornell.edu> Date: Wed, 24 Jun 2020 06:24:34 -0400 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.9.0 In-Reply-To: Content-Type: text/plain; charset=windows-1252; format=flowed Content-Language: en-US Content-Transfer-Encoding: 8bit X-ClientProxiedBy: BL0PR02CA0144.namprd02.prod.outlook.com (2603:10b6:208:35::49) To BN8PR04MB6163.namprd04.prod.outlook.com (2603:10b6:408:5c::27) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from [192.168.0.17] (68.175.129.7) by BL0PR02CA0144.namprd02.prod.outlook.com (2603:10b6:208:35::49) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3109.22 via Frontend Transport; Wed, 24 Jun 2020 10:24:35 +0000 X-Originating-IP: [68.175.129.7] X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 5db7018c-673a-41df-5800-08d81828cb42 X-MS-TrafficTypeDiagnostic: BN7PR04MB3956: X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:530; X-Forefront-PRVS: 0444EB1997 X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: AX5x4kq1GL2tHOwwf5oKtkyhbM6cGYZZtqCKtzWachF/60U+gsobXl67Xw09/SItNuAHAvTK/R87ergnVy8cGX7RyHiaHA2mgDJbnFJIXiG8BRZMl3giUF+OhlnPO+CsUrJVHVSxmUlyGMYfGGS5TPlZyzxH/SyKVL595lhEYrSLGHEsvUjiieqjGw8edMxon5jqJ5QS4vsOFPllRZ5T1dliSy48NWG6l0EvJchO/6DnkzLCufrp9R1Llx8i2wgQKBfZQVwNi7kyYNcP49REDDs5xVMAOPA4foaTpuB0A9Yyxvsl49Emmk5eiw9BZEYKkr8T0Sgqt62DccqZHsEQftrXeO3pgqHxDvQEeiUl2HK8hi+9wEJw5ei6fJUvw/j3 X-Forefront-Antispam-Report: CIP:255.255.255.255; CTRY:; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:BN8PR04MB6163.namprd04.prod.outlook.com; PTR:; CAT:NONE; SFTY:; SFS:(4636009)(136003)(366004)(376002)(396003)(346002)(39850400004)(83380400001)(52116002)(478600001)(53546011)(5660300002)(6486002)(2906002)(86362001)(66946007)(26005)(31696002)(66476007)(16526019)(186003)(75432002)(316002)(66556008)(786003)(31686004)(2616005)(8676002)(6916009)(8936002)(956004)(36756003)(16576012)(43740500002); DIR:OUT; SFP:1102; X-MS-Exchange-AntiSpam-MessageData: rMC05Od9rTiho6m9ag8brIGgBpz8bZ/IAwls4lnk17WHZT4PUv1fKSoCeLPwp6NWybdV+YCwwaaRjr64NSWw6b2cz45Qz3ksoKXGk84Y00unf0WFKnIml9543IhR0nXf45AlRox27nk3vNpNl/2a+KMAEPiO7q7KQNSoiQGVxFgeQ6ONNxkAgw/2h7L9R9+itNYWzSAY0rGZTJx+xvl4rzEvU2r7I8YT4WFjiqhPNcM50qfZLC6ZlHH4LZ2QIZ1k9v+lHLmq1WZVJa49fNl53X7uhusMHpHl/c7enyFRMv28azCC94Spnqkp4X6UaA0jpNMpFRsx+F6YeNpB+pSpzh3gAz6NN+3lPvC570ANBr2W/0Cctakd90kOtjWzSBcp6M4vR7KFyTdMdam5tYrUUR1RXvbID8OTgAydePCb+HW/knhMNwVJm2SP4oRMwDpZCK8AU03XB2qMKpzXgmO6VD6KnAFo5REcv5J/ONmnZWQ= X-OriginatorOrg: cornell.edu X-MS-Exchange-CrossTenant-Network-Message-Id: 5db7018c-673a-41df-5800-08d81828cb42 X-MS-Exchange-CrossTenant-OriginalArrivalTime: 24 Jun 2020 10:24:36.2565 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 5d7e4366-1b9b-45cf-8e79-b14b27df46e1 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: H4wEy88ftMrmV3KdvPRwQbonHoKpPOsN4uzEbcdmdAOZaOeHkpl8o1Wb1RGFoCtAHuYbUzC67YOgtEpMISEk/A== X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN7PR04MB3956 X-Spam-Status: No, score=0.0 required=5.0 tests=BAYES_00, DKIM_INVALID, DKIM_SIGNED, JMQ_SPF_NEUTRAL, KAM_DMARC_STATUS, MSGID_FROM_MTA_HEADER, RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2, SPF_HELO_PASS, SPF_PASS, TXREP autolearn=no autolearn_force=no version=3.4.2 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on server2.sourceware.org X-BeenThere: cygwin@cygwin.com X-Mailman-Version: 2.1.29 Precedence: list List-Id: General Cygwin discussions and problem reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 24 Jun 2020 10:24:39 -0000 On 6/24/2020 1:30 AM, Marco Atzeri via Cygwin wrote: > On 23.06.2020 23:02, Marco Atzeri wrote: >> On 23.06.2020 22:56, Ken Brown via Cygwin wrote: >>> >>> I think I've found the problem, although it will take patching and rebuilding >>> ImageMagick (which I haven't done) to confirm that I'm right. >>> >>> In the ImageMagick source file coders/ps.c:237, there's a call to >>> ghost_info->new_instance, a.k.a. gsapi_new_instance (see line 214). The >>> documentation of the latter in the ghostscript sources (psi/iapi.c:57) says >>> that the first argument pinstance should satisfy *pinstance == NULL in the >>> first call to that function. >>> >>> But *pinstance in this call is the variable 'interpreter', defined without >>> initialization in ps.c:191.  As a result, **pinstance contains garbage, and >>> the program eventually crashes when it tries to dereference a garbage pointer. >>> >>> The fix, if I'm right, is to initialize interpreter to NULL in ps.c:191. >>> >>> Ken >> >> Noted. >> >> Regards >> MArco >> > > a test ImageMagick-6.9.10.11-3 is going up. > Let me know if it solves the problem That fixes it for my .eps file. I didn't think of it before, but a similar patch to coders/pdf.c:201 will be needed for .pdf files. I won't be able to test that because I haven't found a .pdf file that exhibits the problem. Ken Ken