From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtp-out-no.shaw.ca (smtp-out-no.shaw.ca [64.59.134.12]) by sourceware.org (Postfix) with ESMTPS id 6A423385040E for ; Thu, 10 Sep 2020 19:38:40 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org 6A423385040E Authentication-Results: sourceware.org; dmarc=none (p=none dis=none) header.from=SystematicSw.ab.ca Authentication-Results: sourceware.org; spf=none smtp.mailfrom=brian.inglis@systematicsw.ab.ca Received: from [192.168.1.104] ([24.64.172.44]) by shaw.ca with ESMTP id GSOxkbuDF62brGSOyk45Zp; Thu, 10 Sep 2020 13:38:39 -0600 X-Authority-Analysis: v=2.3 cv=LKf9vKe9 c=1 sm=1 tr=0 a=kiZT5GMN3KAWqtYcXc+/4Q==:117 a=kiZT5GMN3KAWqtYcXc+/4Q==:17 a=IkcTkHD0fZMA:10 a=w_pzkKWiAAAA:8 a=jChkm-x5hCMFubTIiR0A:9 a=QEXdDO2ut3YA:10 a=sRI3_1zDfAgwuvI8zelB:22 Reply-To: cygwin@cygwin.com Subject: Re: /dev/p* causes shell crash in i686 To: cygwin@cygwin.com References: <20200909214930.GA4127@calimero.vinschen.de> <9guklf1s4h9bgik1ik916j0ddi6g8ps93h@4ax.com> <02fccd98-5371-2399-ce86-ddd1a545f298@cornell.edu> From: Brian Inglis Autocrypt: addr=Brian.Inglis@SystematicSw.ab.ca; prefer-encrypt=mutual; keydata= mDMEXopx8xYJKwYBBAHaRw8BAQdAnCK0qv/xwUCCZQoA9BHRYpstERrspfT0NkUWQVuoePa0 LkJyaWFuIEluZ2xpcyA8QnJpYW4uSW5nbGlzQFN5c3RlbWF0aWNTdy5hYi5jYT6IlgQTFggA PhYhBMM5/lbU970GBS2bZB62lxu92I8YBQJeinHzAhsDBQkJZgGABQsJCAcCBhUKCQgLAgQW AgMBAh4BAheAAAoJEB62lxu92I8Y0ioBAI8xrggNxziAVmr+Xm6nnyjoujMqWcq3oEhlYGAO WacZAQDFtdDx2koSVSoOmfaOyRTbIWSf9/Cjai29060fsmdsDLg4BF6KcfMSCisGAQQBl1UB BQEBB0Awv8kHI2PaEgViDqzbnoe8B9KMHoBZLS92HdC7ZPh8HQMBCAeIfgQYFggAJhYhBMM5 /lbU970GBS2bZB62lxu92I8YBQJeinHzAhsMBQkJZgGAAAoJEB62lxu92I8YZwUBAJw/74rF IyaSsGI7ewCdCy88Lce/kdwX7zGwid+f8NZ3AQC/ezTFFi5obXnyMxZJN464nPXiggtT9gN5 RSyTY8X+AQ== Organization: Systematic Software Message-ID: <8b053260-f6b6-5a04-60c9-f511172c957e@SystematicSw.ab.ca> Date: Thu, 10 Sep 2020 13:38:35 -0600 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.12.0 MIME-Version: 1.0 In-Reply-To: <02fccd98-5371-2399-ce86-ddd1a545f298@cornell.edu> Content-Type: text/plain; charset=utf-8 Content-Language: en-CA Content-Transfer-Encoding: 8bit X-CMAE-Envelope: MS4wfHON+pjxGLPw18ysxl4gjTPopL/TaqM70KwNzXpxExUIpJK+ctMZC9XpS++YQjehujGcQZwBIY+OER0YKW8hy0+tDnf4dk3Nc29Ktva8bPeIsT9lON1n hL+/pfeeqKqlP+8DM+V0hLsfPgn0H3u5IS0pkBbi52OD0rz4MctytDRMP4PEpL138taTiHRLYauu6A== X-Spam-Status: No, score=-8.4 required=5.0 tests=BAYES_00, KAM_DMARC_STATUS, KAM_LAZY_DOMAIN_SECURITY, KAM_NUMSUBJECT, NICE_REPLY_A, RCVD_IN_DNSWL_LOW, RCVD_IN_MSPIKE_H3, RCVD_IN_MSPIKE_WL, SPF_HELO_NONE, SPF_NONE, TXREP autolearn=ham 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: Thu, 10 Sep 2020 19:38:41 -0000 On 2020-09-10 13:19, Ken Brown via Cygwin wrote: > On 9/10/2020 3:15 PM, Andrew Schulman via Cygwin wrote: >>> On Sep  9 08:08, Andrew Schulman via Cygwin wrote: >>>> Here's a strange one. In bash in i686, try to run: >>>> >>>> ls /dev/ptmx >>>> >>>> I only get about as far as: >>>> >>>> ls /dev/p >>>> >>>> and then my terminal window vanishes. This happens: >>>> >>>> * In fish or bash. >>>> * On two different hosts that I've tried. >>>> * In mintty or a system terminal. In the system terminal, sometimes the >>>> command works normally the first time, but fails the 2nd time; or I have to >>>> press after `ls /dev/p`, then the terminal vanishes. >>>> * With other commands that treat their arguments as files, not text. So for >>>> example, I can't finish typing `cat /dev/ptmx` or `test -r /dev/ptmx` >>>> before the terminal window vanishes, but `echo /dev/ptmx` works normally. >>>> >>>> It doesn't happen: >>>> >>>> * In x86_64 - only i686. >>>> * In scripts - only interactively. >>>> >>>> Is anyone else able to reproduce this? I've tried to capture an strace log, >>>> but I've failed so far. The strace seems to stop the crash. Still trying. >>>> >>>> I thought this could be a BLODA problem, but the two hosts I tried are >>>> running different virus scanners (McAfee and Windows Defender). >>>> >>>> Cygwin 3.1.7-1, all packages up-to-date. Output of cygcheck -svr attached. >>>> >>>> Andrew >>> >>> I think I fixed it.  I just uploaded new developer snapshots to >>> https://cygwin.com/snapshots/  Please give them a try. >> >> When I substitute cygwin1-20090909.dll for cygwin1.dll in i686, I can't run >> any commands. They all give "The application was unable to start correctly >> (0xc0000022)". Anything different I should be doing? > > Check the permissions on cygwin1-20090909.dll.  Is it executable? I recommend untar elsewhere and mv don't cp DLLs, especially cygwin1.dlls, as they seem to be able to get into a state showing such symptoms as above, even with local test builds, or after downloading and stripping Alternate Data Streams if present, tweaking perms and ACLs. -- Take care. Thanks, Brian Inglis, Calgary, Alberta, Canada This email may be disturbing to some readers as it contains too much technical detail. Reader discretion is advised. [Data in IEC units and prefixes, physical quantities in SI.]