Bug #78713 [Opn]: segfaults with opcache.preload

From: Date: Tue, 22 Oct 2019 06:34:25 +0000
Subject: Bug #78713 [Opn]: segfaults with opcache.preload
References: 1  Groups: php.bugs 
Request: Send a blank email to php-bugs+get-223364@lists.php.net to get a copy of this message 
Edit report at https://bugs.php.net/bug.php?id=78713&edit=1

 ID:                 78713
 Updated by:         remi@php.net
 Reported by:        remi@php.net
 Summary:            segfaults with opcache.preload
 Status:             Open
 Type:               Bug
 Package:            opcache
 PHP Version:        7.4.0RC4
 Block user comment: N
 Private report:     N

 New Comment:

Sorry for previous comment

segfault happens everywhere (RHEL 7, Centos 8, Fedora...) as soon as trying to preload a class using
FFI as root.


Previous Comments:
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[2019-10-21 14:30:17] remi@php.net

Not related to mod_php, same segfault with CLI

Could be related to (old) libffi 3.0.13 on RHEL / CentOS 7

------------------------------------------------------------------------
[2019-10-21 14:08:51] remi@php.net

Description:
------------
Using opcache.preload + opcache.preload_user=apache


(gdb) bt
#0  0x00007ffff657b974 in __memset_sse2 () from /lib64/libc.so.6
#1  0x00007fffe74b1980 in php_request_startup () at /usr/src/debug/php-7.4.0RC4/main/main.c:1798
#2  0x00007fffe759b7ea in php_apache_request_ctor (r=r@entry=0x555556c926d0, ctx=<optimized
out>) at /usr/src/debug/php-7.4.0RC4/sapi/apache2handler/sapi_apache2.c:537
#3  0x00007fffe759bf63 in php_handler () at
/usr/src/debug/php-7.4.0RC4/sapi/apache2handler/sapi_apache2.c:655
#4  0x0000555555595af0 in ap_run_handler ()
#5  0x0000555555596039 in ap_invoke_handler ()
#6  0x00005555555aac4a in ap_process_async_request ()
#7  0x00005555555aaf32 in ap_process_request ()
#8  0x00005555555a70c2 in ap_process_http_connection ()
#9  0x000055555559f120 in ap_run_process_connection ()
#10 0x00007fffedc317af in child_main () from /etc/httpd/modules/mod_mpm_prefork.so
#11 0x00007fffedc319ac in make_child () from /etc/httpd/modules/mod_mpm_prefork.so
#12 0x00007fffedc32731 in prefork_run () from /etc/httpd/modules/mod_mpm_prefork.so
#13 0x000055555557a0ce in ap_run_mpm ()
#14 0x0000555555572e26 in main ()




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