From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mout.kundenserver.de (mout.kundenserver.de [212.227.17.10]) by sourceware.org (Postfix) with ESMTPS id 9696D391E701 for ; Mon, 19 Dec 2022 09:44:56 +0000 (GMT) Authentication-Results: sourceware.org; dmarc=permerror header.from=cygwin.com Authentication-Results: sourceware.org; spf=fail smtp.mailfrom=cygwin.com Received: from calimero.vinschen.de ([24.134.7.25]) by mrelayeu.kundenserver.de (mreue109 [212.227.15.183]) with ESMTPSA (Nemesis) id 1MLA6m-1pPQ4i0mtm-00IEjJ for ; Mon, 19 Dec 2022 10:44:54 +0100 Received: by calimero.vinschen.de (Postfix, from userid 500) id 3323AA80B9B; Mon, 19 Dec 2022 10:44:53 +0100 (CET) Date: Mon, 19 Dec 2022 10:44:53 +0100 From: Corinna Vinschen To: cygwin@cygwin.com Subject: Re: Fork issues with 3.4 in Docker only Message-ID: Reply-To: cygwin@cygwin.com Mail-Followup-To: cygwin@cygwin.com References: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: X-Provags-ID: V03:K1:NNldhyIc9e6IBeYuR6TkgUvXMcIOBgnOHKzBLPvvfc7f1cFPGGj a3vxisSIl9IwTwKtg/ljxY6thAEgMnwLGGRezXMK8xZssuvd229/2ydArCAK0IAnBrW4zIo hXCD0WZE6oGPk/LuGq3H+TgTO2eYBUr9k5cg0qJJgQyMDnXUsQ4RgrZNNHz1R04apEicLWr 2fn6eZe1DN6QpESh9mgXA== UI-OutboundReport: notjunk:1;M01:P0:U20y4ODlOQM=;+JSGk7Z/r8OZzn1On20Nl+8Xymo yzEGDojaK3s7XAoVA1ZdHlwwfSKojmez+tJ42ysPU3NsgkJu+V0lGN7ScYn5kqnIo8EwXQv3F hPeY7hNfpt2onb7MazHsvB5w/KDmCBhmmuHK7Pday8hz0xNJNTtrfpjpk8SiXILWRJYxYPMYE JZTAzq6Bbc/tTYykZygCN22PyfSB64ENut09FFmGPsSNF+onAk9xL3QT8g0TkcTadhAL0lBbw DGbEu8k2Iv1gkvaVAUx1o83cusV/hNp2ookmZp6KywyA9wqqnd4dPeSiGVcTWnh/3jlmrVACd JZbG7zzthF+d0ayFX6RZQyzOmsxKTNz8qdIEv8anZoBbhFnzgALC//jIKLcU/0NhAR1QmO/YB Xxm5qv8lv4AhCSExmBEx9SWQlpeAri7vs3I6pE8I2zQ1CTQ5WWgAltlECifRhutX+uIaX6mSt KbH1N4bjT+4B+C+0vMQ6oSUDXnMdYcrTyrE7zDLn2IG1YVrOY/2p4l/1TTc93nytXIac2Go9i IpC1L7mUmNwJJusJPcjG5j2/4ed0EIv6caBgtelcpkgBI6T47G6BmX2QGEQreOAa98riD8wp6 5OEiyq0oNV5GS/CbAbuu/sM9KzCrJ5ZzRT4H87Gq8Vkdsd9fRDiEdkReUcQRyFdYZXcLpXGn9 mI4ji1LbSgAK2c65BXP0RaIveSIiZrr6q0CoEDLwpw== X-Spam-Status: No, score=-96.6 required=5.0 tests=BAYES_00,GOOD_FROM_CORINNA_CYGWIN,KAM_DMARC_STATUS,RCVD_IN_DNSWL_NONE,RCVD_IN_MSPIKE_H2,SPF_FAIL,SPF_HELO_NONE,TXREP autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: On Dec 18 10:18, Christoph Reiter via Cygwin wrote: > After the upgrade to 3.4 (disclaimer: in MSYS2) I'm seeing, and getting reports > of, various things failing in Docker only, for example: > > 1 [main] pacman 252 child_copy: dll data read copy failed, > 0x7FF8C816C000..0x7FF8C8178EB0, done 0, windows pid 5096, Win32 error > 299 > 0 [main] pacman 251 dofork: child -1 - forked process 5096 died > unexpectedly, retry 0, exit code 0xC0000005, errno 11 > 0 [main] pacman 253 child_copy: dll data read copy failed, > 0x7FF8C816C000..0x7FF8C8178EB0, done 0, windows pid 584, Win32 error > 299 > 67887 [main] pacman 251 dofork: child -1 - forked process 584 died > unexpectedly, retry 0, exit code 0xC0000005, errno 11 > 0 [main] pacman 254 child_copy: dll data read copy failed, > 0x7FF8C816C000..0x7FF8C8178EB0, done 0, windows pid 2336, Win32 error > 299 > 124719 [main] pacman 251 dofork: child -1 - forked process 2336 died > unexpectedly, retry 0, exit code 0xC0000005, errno 11 > > Reverting https://cygwin.com/git/?p=newlib-cygwin.git;a=commit;h=943433b00cacdde0cb9507d0178770a2fb67bd71 > fixes things again. > > Note that this doesn't happen outside of Docker, I've built more than 100 > packages with 3.4 on different hosts without any issues, and the errors in > Docker are pretty consistent, so I'm guessing that something with ASLR behaves > differently under Docker(?) No idea what docker is doing differently, but you could try to switch off ASLR for the Cygwin DLL. Right now, starting with 3.4.0, it's supposed to be the only DLL using ASLR by default in the Cygwin distro, all other DLLs should still use fixed addresses. Try this: cp /bin/cygwin1.dll ~/docker-cygwin1.dll peflags -d0 ~/docker-cygwin1.dll Then copy that DLL over to /bin/cygwin1.dll in your docker image and try again. Corinna