Edit report at https://bugs.php.net/bug.php?id=78630&edit=1
ID: 78630
Comment by: ilya at ilya dot pp dot ua
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
Type: Bug
Package: PCRE related
Operating System: openSUSE Tumbleweed
PHP Version: 7.3.10
Block user comment: N
Private report: N
New Comment:
Of course with noexec!
sudo cat /etc/fstab
/swap none swap defaults 0 0
UUID=b996e925-3e85-4970-ac69-9c8250989666 / ext4 noatime,acl,user_xattr 1 1
UUID=a8050355-3331-4c81-8cc9-104a8b1632b6 /ILYA ext4 noatime 1 2
tmpfs /tmp tmpfs nodev,nosuid,noexec,size=2G 0 0
tmpfs /var/tmp tmpfs nodev,nosuid,noexec,size=2G 0 0
tmpfs /var/cache/zypp tmpfs nodev,nosuid,noexec,mode=0755,size=2G 0 0
tmpfs /run tmpfs nodev,nosuid,noexec,mode=0755,size=32m 0 0
tmpfs /run/lock tmpfs nodev,nosuid,noexec,mode=0755,size=8m 0 0
tmpfs /root/.cache tmpfs nodev,nosuid,noexec,mode=0700,size=2G 0 0
tmpfs /home/ilya/.cache tmpfs nodev,nosuid,noexec,mode=0700,uid=1000,size=2G 0 0
tmpfs /var/lib/wwwrun/.cache tmpfs nodev,nosuid,noexec,mode=0700,uid=30,size=2G 0 0
Previous Comments:
------------------------------------------------------------------------
[2019-10-04 11:02:45] bugreports at gmail dot com
> But I donât know how to execute it in such a way as to connect
> strace to it, because there is no process before the code execution
that's the much easier case than attach a running process
strace php -r
"preg_match('/^[\w.-]+@[\w.-]+\.\w{2,}$/','ilya@ilya.pp.ua');"
--------------------
usage: strace [-ACdffhikqqrtttTvVwxxyyzZ] [-I n] [-b execve] [-e expr]...
[-a column] [-o file] [-s strsize] [-X format] [-P path]...
[-p pid]... [--seccomp-bpf]
{ -p pid | [-D] [-E var=val]... [-u username] PROG [ARGS] }
or: strace -c[dfwzZ] [-I n] [-b execve] [-e expr]... [-O overhead]
[-S sortby] [-P path]... [-p pid]... [--seccomp-bpf]
{ -p pid | [-D] [-E var=val]... [-u username] PROG [ARGS] }
------------------------------------------------------------------------
[2019-10-04 10:59:16] ilya at ilya dot pp dot ua
I found a shorter and more reliable way to show the problem right from the console.
php -r "preg_match('/^[\w.-]+@[\w.-]+\.\w{2,}$/','ilya@ilya.pp.ua');"
PHP Warning: preg_match(): JIT compilation failed: no more memory in Command line code on line 1
This code always gives an error no matter how much I run it.
But I donât know how to execute it in such a way as to connect strace to it, because there is
no process before the code execution ..., you can probably try sleep(30) &&.
And now I'm even more confused ...
php -r "preg_match('/^[\w.-]+@[\w.-]+\.\w{2,}$/','ilya@ilya.pp.ua');"
Always performed with an error!
php -r
"sleep(30)&&preg_match('/^[\w.-]+@[\w.-]+\.\w{2,}$/','ilya@ilya.pp.ua');"
It always runs without error, so I put it strace You will not be interested.
Is there a way to connect strace without knowing the process number in advance?
------------------------------------------------------------------------
[2019-10-04 10:59:15] bugreports at gmail dot com
> Note that openSUSE Tumbleweed uses a private /tmp,
> which is mounted under /var/tmp/systemd-private...
this is not true!
PrivateTemp isolates /tmp and /var/tmp and so you have /tmp/systemd-private...
------------------------------------------------------------------------
[2019-10-04 10:43:21] build+suse at de-korte dot org
Note that openSUSE Tumbleweed uses a private /tmp, which is mounted under
/var/tmp/systemd-private-[lots of hex]-php-fpm.service-[more hex]/tmp. So if you have mounted your
/var partition as no-exec, the private /tmp your PHP process is using will also be no-exec.
------------------------------------------------------------------------
[2019-10-04 10:35:58] nikic@php.net
Thanks for the strace logs! The relevant part is:
openat(AT_FDCWD, "/tmp", O_RDWR|O_EXCL|O_NOATIME|O_CLOEXEC|O_TMPFILE, 0600) = 5
ftruncate(5, 65536) = 0
mmap(NULL, 65536, PROT_READ|PROT_WRITE, MAP_SHARED, 5, 0) = 0x7f33788e9000
mmap(NULL, 65536, PROT_READ|PROT_EXEC, MAP_SHARED, 5, 0) = -1 EPERM
(ÐпеÑаÑÐ¸Ñ Ð½Ðµ позволена)
munmap(0x7f33788e9000, 65536) = 0
close(5) = 0
The PROT_READ|PROT_EXEC mmap fails with EPERM. Apart from the possibility of this being prevented by
something like SELinux, the man page also lists two more possibilities:
EPERM The prot argument asks for PROT_EXEC but the mapped area
belongs to a file on a filesystem that was mounted no-exec.
EPERM The operation was prevented by a file seal; see fcntl(2).
Could you check whether the /tmp filesystem might be mounted as noexec? (This should be visible in
the output of "mount".)
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