Bug #78630 [Opn->Csd]: PHP 7.3 preg_match(): JIT compilation failed: no more memory (need pcre.jit=0)

From:	nikic@php.net	Date:	Mon, 07 Oct 2019 11:32:23 +0000
Subject:	Bug #78630 [Opn->Csd]: PHP 7.3 preg_match(): JIT compilation failed: no more memory (need pcre.jit=0)
References:	1	Groups:	php.bugs
Request:	Send a blank email to php-bugs+get-223108@lists.php.net to get a copy of this message

Edit report at https://bugs.php.net/bug.php?id=78630&edit=1

 ID:                 78630
 Updated by:         nikic@php.net
 Reported by:        ilya at ilya dot pp dot ua
 Summary:            PHP 7.3 preg_match(): JIT compilation failed: no
                     more memory (need pcre.jit=0)
-Status:             Open
+Status:             Closed
 Type:               Bug
 Package:            PCRE related
 Operating System:   openSUSE Tumbleweed
 PHP Version:        7.3.10
-Assigned To:        
+Assigned To:        nikic
 Block user comment: N
 Private report:     N

 New Comment:

The pcre use-after-free on allocation failure is fixed with https://github.com/php/php-src/commit/ab61d5caf926e080fb5729dbef9ae091169cec88.

I don't think there is anything more we can do here from PHP's side. What is left is
either granting PHP appropriate permissions or setting pcre.jit=0, but that has to happen on the
distro or developer side.


Previous Comments:
------------------------------------------------------------------------
[2019-10-04 15:46:25] ilya at ilya dot pp dot ua

https://build.opensuse.org/package/view_file/devel:libraries:c_c++/pcre2/pcre2.changes?expand=1
-------------------------------------------------------------------
Tue Dec 11 14:31:55 UTC 2018 - Cristian Rodríguez <crrodriguez@opensuse.org>

- Build with --enable-jit-sealloc option, otherwise when 
  selinux is enabled or systemd memory protections are on,
  programs will fail to work with execmem violations.

Vicious circle. :-(

------------------------------------------------------------------------
[2019-10-04 15:24:03] ilya at ilya dot pp dot ua

I'm build pcre2 without "--enable-jit-sealloc" and it works without errors!
https://bugzilla.suse.com/attachment.cgi?id=820598
Please see what has changed, is jit compiled at all, and if so, in which directory?

------------------------------------------------------------------------
[2019-10-04 14:08:38] nikic@php.net

> than that fallback simply happen in pcre itself and for some reason not in pcre2

Actually the fallback does still happen, the difference is just that now a warning is printed. The
preg_match() call succeeds in either case though.

I have now landed an initial improvement in https://github.com/php/php-src/commit/1d6e9da7433bddca5c591ef5b2eeef9c410543bb.
It provides a more explicit error message, pointing people to either fix their security restrictions
or set pcre.jit=0. It also disables the JIT, so this is not going to be printed for every regex like
the current warning is.

We might want to change this to happen completely silently though.

> Does something have to change if I rebuild pcre2 without option
> "--enable-jit-sealloc" and rebuild php with this?

It might work. But if there is some restriction in place that prohibits WX mmaps, then that
won't help either.

------------------------------------------------------------------------
[2019-10-04 13:42:41] ilya at ilya dot pp dot ua

Does something have to change if I rebuild pcre2 without option "--enable-jit-sealloc" and
rebuild php with this?
I am now waiting for the building to complete.

------------------------------------------------------------------------
[2019-10-04 13:28:28] bugreports at gmail dot com

this bugreport here was the reason that i opened https://bugs.php.net/bug.php?id=78631 last night

things like https://bugs.exim.org/show_bug.cgi?id=2453 as
well as the summarized changelog from fedora pcre2-10.33 for me are questioning if cherrypicking
alone scales

------------------------------------------------------------------------


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the rest of the comments, please view the bug report online at

    https://bugs.php.net/bug.php?id=78630


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Edit this bug report at https://bugs.php.net/bug.php?id=78630&edit=1


   

Thread (34 messages)

• ilya at ilya dot pp dot uaThu, 03 Oct 2019 20:08:57 +0000
  • nikic@php.netThu, 03 Oct 2019 20:17:31 +0000Bug #78630 [Opn]: PHP 7.3 preg_match(): JIT compilation failed: no more memory (need pcre.jit=0)
  • ilya at ilya dot pp dot uaThu, 03 Oct 2019 20:28:51 +0000Bug #78630 [Opn]: PHP 7.3 preg_match(): JIT compilation failed: no more memory (need pcre.jit=0)
  • ilya at ilya dot pp dot uaThu, 03 Oct 2019 20:56:49 +0000Bug #78630 [Com]: PHP 7.3 preg_match(): JIT compilation failed: no more memory (need pcre.jit=0)
  • ilya at ilya dot pp dot uaThu, 03 Oct 2019 21:15:29 +0000Bug #78630 [Com]: PHP 7.3 preg_match(): JIT compilation failed: no more memory (need pcre.jit=0)
  • nikic@php.netThu, 03 Oct 2019 21:33:06 +0000Bug #78630 [Opn]: PHP 7.3 preg_match(): JIT compilation failed: no more memory (need pcre.jit=0)
  • build+suse at de-korte dot orgFri, 04 Oct 2019 07:49:09 +0000Bug #78630 [Com]: PHP 7.3 preg_match(): JIT compilation failed: no more memory (need pcre.jit=0)
  • nikic@php.netFri, 04 Oct 2019 07:54:57 +0000Bug #78630 [Opn]: PHP 7.3 preg_match(): JIT compilation failed: no more memory (need pcre.jit=0)
  • ilya at ilya dot pp dot uaFri, 04 Oct 2019 10:15:05 +0000Bug #78630 [Com]: PHP 7.3 preg_match(): JIT compilation failed: no more memory (need pcre.jit=0)
  • nikic@php.netFri, 04 Oct 2019 10:35:58 +0000Bug #78630 [Opn]: PHP 7.3 preg_match(): JIT compilation failed: no more memory (need pcre.jit=0)
  • build+suse at de-korte dot orgFri, 04 Oct 2019 10:43:21 +0000Bug #78630 [Com]: PHP 7.3 preg_match(): JIT compilation failed: no more memory (need pcre.jit=0)
  • bugreports at gmail dot comFri, 04 Oct 2019 10:59:15 +0000Bug #78630 [Com]: PHP 7.3 preg_match(): JIT compilation failed: no more memory (need pcre.jit=0)
  • ilya at ilya dot pp dot uaFri, 04 Oct 2019 10:59:16 +0000Bug #78630 [Com]: PHP 7.3 preg_match(): JIT compilation failed: no more memory (need pcre.jit=0)
  • bugreports at gmail dot comFri, 04 Oct 2019 11:02:45 +0000Bug #78630 [Com]: PHP 7.3 preg_match(): JIT compilation failed: no more memory (need pcre.jit=0)
  • ilya at ilya dot pp dot uaFri, 04 Oct 2019 11:05:39 +0000Bug #78630 [Com]: PHP 7.3 preg_match(): JIT compilation failed: no more memory (need pcre.jit=0)
  • ilya at ilya dot pp dot uaFri, 04 Oct 2019 11:12:55 +0000Bug #78630 [Com]: PHP 7.3 preg_match(): JIT compilation failed: no more memory (need pcre.jit=0)
  • build+suse at de-korte dot orgFri, 04 Oct 2019 11:54:05 +0000Bug #78630 [Com]: PHP 7.3 preg_match(): JIT compilation failed: no more memory (need pcre.jit=0)
  • bugreports at gmail dot comFri, 04 Oct 2019 11:58:18 +0000Bug #78630 [Com]: PHP 7.3 preg_match(): JIT compilation failed: no more memory (need pcre.jit=0)
  • ilya at ilya dot pp dot uaFri, 04 Oct 2019 12:11:20 +0000Bug #78630 [Com]: PHP 7.3 preg_match(): JIT compilation failed: no more memory (need pcre.jit=0)
  • nikic@php.netFri, 04 Oct 2019 12:11:25 +0000Bug #78630 [Opn]: PHP 7.3 preg_match(): JIT compilation failed: no more memory (need pcre.jit=0)
  • bugreports at gmail dot comFri, 04 Oct 2019 12:42:29 +0000Bug #78630 [Com]: PHP 7.3 preg_match(): JIT compilation failed: no more memory (need pcre.jit=0)
  • ilya at ilya dot pp dot uaFri, 04 Oct 2019 12:47:16 +0000Bug #78630 [Com]: PHP 7.3 preg_match(): JIT compilation failed: no more memory (need pcre.jit=0)
  • bugreports at gmail dot comFri, 04 Oct 2019 12:49:56 +0000Bug #78630 [Com]: PHP 7.3 preg_match(): JIT compilation failed: no more memory (need pcre.jit=0)
  • nikic@php.netFri, 04 Oct 2019 12:51:48 +0000Bug #78630 [Opn]: PHP 7.3 preg_match(): JIT compilation failed: no more memory (need pcre.jit=0)
  • nikic@php.netFri, 04 Oct 2019 12:55:47 +0000Bug #78630 [Opn]: PHP 7.3 preg_match(): JIT compilation failed: no more memory (need pcre.jit=0)
  • nikic@php.netFri, 04 Oct 2019 13:22:47 +0000Bug #78630 [Opn]: PHP 7.3 preg_match(): JIT compilation failed: no more memory (need pcre.jit=0)
  • bugreports at gmail dot comFri, 04 Oct 2019 13:23:57 +0000Bug #78630 [Com]: PHP 7.3 preg_match(): JIT compilation failed: no more memory (need pcre.jit=0)
  • bugreports at gmail dot comFri, 04 Oct 2019 13:28:28 +0000Bug #78630 [Com]: PHP 7.3 preg_match(): JIT compilation failed: no more memory (need pcre.jit=0)
  • ilya at ilya dot pp dot uaFri, 04 Oct 2019 13:42:41 +0000Bug #78630 [Com]: PHP 7.3 preg_match(): JIT compilation failed: no more memory (need pcre.jit=0)
  • nikic@php.netFri, 04 Oct 2019 14:08:38 +0000Bug #78630 [Opn]: PHP 7.3 preg_match(): JIT compilation failed: no more memory (need pcre.jit=0)
  • ilya at ilya dot pp dot uaFri, 04 Oct 2019 15:24:03 +0000Bug #78630 [Com]: PHP 7.3 preg_match(): JIT compilation failed: no more memory (need pcre.jit=0)
  • ilya at ilya dot pp dot uaFri, 04 Oct 2019 15:46:25 +0000Bug #78630 [Com]: PHP 7.3 preg_match(): JIT compilation failed: no more memory (need pcre.jit=0)
  • nikic@php.netMon, 07 Oct 2019 11:32:23 +0000Bug #78630 [Opn->Csd]: PHP 7.3 preg_match(): JIT compilation failed: no more memory (need pcre.jit=0)
  • ilya at ilya dot pp dot uaMon, 07 Oct 2019 16:02:10 +0000Bug #78630 [Com]: PHP 7.3 preg_match(): JIT compilation failed: no more memory (need pcre.jit=0)