Re: kern/53474: mmap get anon execuable memory return MAP_FAILED

[? ?? <zh_jq%outlook.com@localhost>]

The following reply was made to PR kern/53474; it has been noted by GNATS.

From: ? ?? <zh_jq%outlook.com@localhost>
To: "gnats-bugs%netbsd.org@localhost" <gnats-bugs%netbsd.org@localhost>
Cc: Martin Husemann <martin%duskware.de@localhost>
Subject: Re: kern/53474: mmap get anon execuable memory return MAP_FAILED
Date: Thu, 26 Jul 2018 15:19:44 +0000

 Sorry, resend again, as the previous one has been changed by outlook.com
 >  On Thu, Jul 26, 2018 at 02:15:00PM +0000, zh_jq%outlook.com@localhost wrote:
 >  >         void *retval =3D mmap(NULL, 4096, PROT_READ | PROT_WRITE |
 >  >         PROT_EXEC, MAP_PRIVATE | MAP_ANON, -1, 0);
 >  You can not create writable + executable mappings when pax mprotect is
 >  active (which is the default on many architectures). See mremap(2).
 OK, got it.
 I will write a bug report to pcre2.
 As a temprate solution I will disable security.pax.mprotect.enabled.
 Thanks