X-Recipient: archive-cygwin AT delorie DOT com DomainKey-Signature: a=rsa-sha1; c=nofws; d=sourceware.org; h=list-id :list-unsubscribe:list-subscribe:list-archive:list-post :list-help:sender:subject:to:references:from:reply-to:message-id :date:mime-version:in-reply-to:content-type; q=dns; s=default; b= NurzYsB4QoupC5tc7KND5X0RNApPsKqObyqGi2jeqHPHkYkLPGd87yC25iodPNsU +InIjMLkIB7I8/rPcmhEVuzuk9nBCTXSHM7bi56Yu7QS8VYtuGJmlYVDCkwrL/fA MqQSHRHw4aOP/H7sTYy6R551M2vJDRMrimdGYkBpZrw= DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=sourceware.org; h=list-id :list-unsubscribe:list-subscribe:list-archive:list-post :list-help:sender:subject:to:references:from:reply-to:message-id :date:mime-version:in-reply-to:content-type; s=default; bh=BAdRD dxF5SCTm0V7h2MEiS0qZvY=; b=BUsY/duqC9/IMvqq+BhD+plvN2lIc++u43cxL Vj7AdixHjotS1lGp+qgsAoy15HfGUCKW+xyzlF5XezyX11Henkv5n/SqNMz4wZWS yMi6nqk6q6CCrVSm2T2f+eeY7LRy+8ptal2V4UVJblsldzzzhPV0kOtcoKPfDE8k ovFxA0= Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner AT cygwin DOT com Mail-Followup-To: cygwin AT cygwin DOT com Delivered-To: mailing list cygwin AT cygwin DOT com Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: =?ISO-8859-1?Q?No, score=-1.9 required=5.0 tests=BAYES_00,FREEMAIL_FROM,RCVD_IN_DNSWL_NONE,SPF_PASS autolearn=ham version=3.3.2 spammy=Greetings, Stphane, st=c3=a9phane, mbape?= X-HELO: sonic309-24.consmr.mail.ir2.yahoo.com Subject: Re: fork fails after nmap with hint address in an unmapped memory region To: cygwin AT cygwin DOT com References: <15510444518 DOT 20171209184819 AT yandex DOT ru> From: "Stéphane Mbape via cygwin" Reply-To: =?UTF-8?Q?St=c3=a9phane_Mbape?= Message-ID: <42c71a45-e61b-6917-b634-e912fb51d2d5@yahoo.fr> Date: Sat, 9 Dec 2017 16:53:29 +0100 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.5.0 MIME-Version: 1.0 In-Reply-To: <15510444518.20171209184819@yandex.ru> Content-Type: multipart/mixed; boundary="------------5994953D5576C281B33D1B91" --------------5994953D5576C281B33D1B91 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Sorry, Cygwin version: 2.9.0 OS: Windows 10 Arch: 64bit The sample was also attached. Le 09/12/2017 à 16:48, Andrey Repin a écrit : > Greetings, Stéphane Mbape! > >> While embeding luajit in a c  program, I found myself unable to fork >> processes. >> Investigations prove that it was related to nmap. >> To be accurate, calling nmap with hint address in a unmapped memory >> region will cause all forks to fail with >> "fixup_mmaps_after_fork: ReadProcessMemory failed for MAP_PRIVATE >> address 0x6FFFFFE0000, Win32 error 299" >> There is a sample code below. > You forgot to mention Cygwin version you're using, and please provide the > sample as an attach to save people the copy-pasting issues. > > --------------5994953D5576C281B33D1B91 Content-Type: text/plain; charset=UTF-8; name="doscript.c" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="doscript.c" I2luY2x1ZGUgPHN0ZGlvLmg+CiNpbmNsdWRlIDxzdGRsaWIuaD4KI2luY2x1 ZGUgPHN5cy9tbWFuLmg+CiNpbmNsdWRlIDxzeXMvd2FpdC5oPgojaW5jbHVk ZSA8dW5pc3RkLmg+CiNpbmNsdWRlIDxzdGRpbnQuaD4KCiNkZWZpbmUgTU1B UF9QUk9UICAgICAgICAgICAoUFJPVF9SRUFEfFBST1RfV1JJVEUpCiNkZWZp bmUgTU1BUF9GTEFHU19QUk9CRSAgICAoTUFQX1BSSVZBVEV8TUFQX0FOT05Z TU9VUykKCmludCBtYWluKCkgewogICAgcHJpbnRmKCJJIGFtIG1hc3RlciAl ZFxuIiwgKGludCkgZ2V0cGlkKCkpOwoKICAgIHNpemVfdCBzaXplID0gKChz aXplX3QpMTI4VSAqIChzaXplX3QpMTAyNFUpOwogICAgdWludHB0cl90IGhp bnRfYWRkciA9IDA7CgogICAgdm9pZCAqcCA9IG1tYXAoKHZvaWQgKiloaW50 X2FkZHIsIHNpemUsIE1NQVBfUFJPVCwgTU1BUF9GTEFHU19QUk9CRSwgLTEs IDApOwogICAgcHJpbnRmICgibm1hcCgpID0gJXAsIGhpbnRfYWRkciA9ICVw XG4iLCBwLCAodm9pZCAqKSBoaW50X2FkZHIpOwoKICAgIHVpbnRwdHJfdCBh ZGRyID0gKHVpbnRwdHJfdCkgcDsKCiAgICBtdW5tYXAocCwgc2l6ZSk7IC8v IG1ha2Ugc3VyZSB0aGVyZSBpcyBhbiB1bm1hcHBlZCBtZW1vcnkKCiAgICAv LyBoaW50X2FkZHIgPSBhZGRyOyAvLyBwcm9kdWNlcyBubyBlcnJvcgogICAg aGludF9hZGRyID0gYWRkciArIDE7CiAgICBwID0gbW1hcCgodm9pZCAqKWhp bnRfYWRkciwgc2l6ZSwgTU1BUF9QUk9ULCBNTUFQX0ZMQUdTX1BST0JFLCAt MSwgMCk7CiAgICBwcmludGYgKCJubWFwKCkgPSAlcCwgaGludF9hZGRyID0g JXBcbiIsIHAsICh2b2lkICopIGhpbnRfYWRkcik7CgogICAgcGlkX3QgY2hp bGRfcGlkID0gZm9yaygpOwoKICAgIGlmIChjaGlsZF9waWQgPCAwKSB7CiAg ICAgICAgcGVycm9yKCJmb3JrIGZhaWxlZCIpOwogICAgfSBlbHNlIGlmIChj aGlsZF9waWQgPT0gMCkgewogICAgICAgIHByaW50ZigiSSBhbSB3b3JrZXIg JWRcbiIsIChpbnQpIGdldHBpZCgpKTsKICAgICAgICBzbGVlcCgyKTsKICAg ICAgICBwcmludGYoIndvcmtlciBleGl0aW5nXG4iKTsKICAgICAgICBleGl0 KDApOwogICAgfQoKICAgIHdhaXQoTlVMTCk7CgogICAgcHJpbnRmKCJtYXN0 ZXIgZXhpdGluZ1xuIik7CiAgICByZXR1cm4gMDsKfQo= --------------5994953D5576C281B33D1B91 Content-Type: text/plain; charset=us-ascii -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple --------------5994953D5576C281B33D1B91--