PHP 7.3.17 segmentation fault about pecl-memcache

[TysonAndre]

Hi - Not a maintainer, but at a glance, it looks like you need to start memcached on port 11212 as well to run the tests that failed. You probably already have one running on port 11211. See https://github.com/websupport-sk/pecl-memcache/blob/NON_BLOCKING_IO_php7/tests/connect.inc#L17-L18

The test failures are probably unrelated to the segmentation fault you're seeing in your configuration. Are you able to provide stack traces or core dumps for the segmentation fault?

You can run make test TESTS=--show-diff to show the test output.

[nicolacontu]

You are right. Now I ran it with the first command as well to start both memcached. See results : [20200609 16:00 1018 [email protected]:~/downloads/memcache-4.0.5.2]# ps aux | grep mem root 68580 0.0 0.0 323172 860 ? Ssl 16:00 0:00 /usr/local/memcached/bin/memcached -p11211 -U11211 -d -u root root 68582 0.0 0.0 323172 864 ? Ssl 16:00 0:00 /usr/local/memcached/bin/memcached -p11212 -U11212 -d -u root root 68760 0.0 0.0 112816 972 pts/4 S+ 16:00 0:00 grep --color=auto mem [20200609 16:00 1019 [email protected]:~/downloads/memcache-4.0.5.2]# [20200609 16:00 1019 [email protected]:~/downloads/memcache-4.0.5.2]# [20200609 16:00 1019 [email protected]:~/downloads/memcache-4.0.5.2]# TEST_PHP_EXECUTABLE=/usr/local/php/bin/php php -dextension=memcache.so run-tests.php -d extension=memcache.so ===================================================================== PHP : /usr/local/php/bin/php PHP_SAPI : cli PHP_VERSION : 7.3.17 ZEND_VERSION: 3.3.17 PHP_OS : Linux - Linux cmd-preprod1.nyh.gt-t.net 3.10.0-957.27.2.el7.x86_64 #1 SMP Mon Jul 29 17:46:05 UTC 2019 x86_64 INI actual : /usr/local/php7.3.17/etc/php.ini More .INIs : --------------------------------------------------------------------- PHP : /usr/local/php7.3.17/bin/phpdbg PHP_SAPI : phpdbg PHP_VERSION : 7.3.17 ZEND_VERSION: 3.3.17 PHP_OS : Linux - Linux cmd-preprod1.nyh.gt-t.net 3.10.0-957.27.2.el7.x86_64 #1 SMP Mon Jul 29 17:46:05 UTC 2019 x86_64 INI actual : /usr/local/php7.3.17/etc/php.ini More .INIs : --------------------------------------------------------------------- CWD : /root/downloads/memcache-4.0.5.2 Extra dirs : VALGRIND : Not used ===================================================================== TIME START 2020-06-09 16:00:55 ===================================================================== PASS memcache_set() function [tests/001.phpt] PASS memcache_get() function [tests/002.phpt] PASS memcache_set()/memcache_get() using compression [tests/003.phpt] PASS memcache_add() & memcache_replace() [tests/004.phpt] PASS strange keys [tests/005.phpt] PASS memcache_increment() & memcache_decrement() [tests/006.phpt] PASS memcache_get_version() & memcache_get_stats() [tests/007.phpt] PASS memcache_delete() [tests/008.phpt] PASS memcache->set() method [tests/009.phpt] PASS memcache->get() function [tests/010.phpt] PASS memcache->set()/memcache->get() using compression [tests/011.phpt] PASS memcache_add() & memcache_replace() [tests/012.phpt] PASS memcache->set() & memcache->get() with strange keys [tests/013.phpt] PASS memcache->increment() & memcache->decrement() [tests/014.phpt] PASS memcache->getVersion() & memcache->getStats() [tests/015.phpt] PASS memcache->delete() [tests/016.phpt] PASS Memcache class should be inheritable [tests/017.phpt] PASS memcache_set() & memcache_add() [tests/018.phpt] PASS memcache->addServer() [tests/019.phpt] PASS memcache_add_server() [tests/019a.phpt] PASS memcache->set()/memcache->get() with multiple keys and load balancing [tests/020.phpt] PASS memcache->set()/memcache->get() with failover [tests/021.phpt] PASS memcache->getExtendedStats() [tests/022.phpt] PASS memcache_get_extended_stats() [tests/022a.phpt] PASS memcache->delete() with load balancing [tests/023.phpt] PASS memcache->close(), memcache->get() [tests/024.phpt] PASS memcache_close(), memcache_get() [tests/024a.phpt] PASS memcache->increment() with load balancing [tests/025.phpt] PASS memcache->delete() with load balancing [tests/026.phpt] PASS memcache->setCompressThreshold() [tests/027.phpt] PASS memcache_set_compress_threshold() [tests/027a.phpt] PASS memcache->addServer() and memcache->close() [tests/028.phpt] PASS ini_set("memcache.allow_failover") [tests/029.phpt] PASS ini_set("memcache.chunk_size") [tests/030.phpt] PASS memcache->addServer() adding server in failed mode [tests/031.phpt] PASS memcache->getServerStatus(), memcache->setServerParams() [tests/032.phpt] PASS memcache->addServer() with server failure callback [tests/033.phpt] PASS memcache->getStats() with arguments [tests/034.phpt] FAIL memcache::connect() with unix domain socket [tests/035.phpt] PASS ini_set('session.save_handler') [tests/036.phpt] PASS ini_set('session.save_path') [tests/036b.phpt] PASS ini_set('memcache.hash_strategy') [tests/037.phpt] SKIP memcache->get() over UDP [tests/038.phpt] reason: known bug SKIP memcache->get() over multi-datagram UDP [tests/039.phpt] reason: UDP is not enabled in connect.inc PASS memcache->increment()/decrement() with multiple keys [tests/040.phpt] PASS memcache->delete() with multiple keys [tests/041.phpt] PASS memcache->set() with multiple values [tests/042.phpt] PASS ini_set('memcache.redundancy') [tests/043.phpt] SKIP ini_set('memcache.session_redundancy') [tests/044.phpt] PASS Nested get's in __wakeup() [tests/045.phpt] PASS hash strategies and functions [tests/046.phpt] PASS memcache->get() with flags [tests/047.phpt] PASS memcache->get(), set() with CAS [tests/048.phpt] PASS memcache->append(), memcache->prepend() [tests/049.phpt] PASS failure callback throws exception [tests/050.phpt] PASS memcache->set() with duplicate keys [tests/051.phpt] PASS memcache->connect() and memcache->close() in loop [tests/052.phpt] FAIL ini_set('session.save_handler') with unix domain socket [tests/053.phpt] PASS memcache->set() with value larger than MTU [tests/054.phpt] PASS memcache->set()/get() datatype preservation [tests/055.phpt] PASS memcache->addServer() with microsecond timeout [tests/056.phpt] PASS session locking [tests/057.phpt] PASS memcache->findServer() [tests/058.phpt] PASS memcache->flush() [tests/100.phpt] PASS memcache_flush() [tests/100a.phpt] PASS memcache->flush() with time in future [tests/100b.phpt] SKIP memcache multi host save path function [tests/bug73539.phpt] reason: not relevant for php 7.1+ PASS session_regenerate_id() should not cause fatal error [tests/githubbug13.phpt] PASS PECL bug #11221 (Double free when returning cached object with __sleep) [tests/pecl11221.phpt] PASS PECL bug #16442 (memcache_set fail with integer value) [tests/pecl16442.phpt] PASS PECL bug #16536 (Weight of 0 causes SegFault on memcache_add_server) [tests/pecl16536.phpt] PASS PECL bug #17518 (Strange behavior in increment on non integer and after) [tests/pecl17518.phpt] PASS PECL bug #17566 (3.0.4 cache delete bug) [tests/pecl17566.phpt] PASS PECL bug #63142 (memcache 3.0.7 segfaults with object (un)serialization) [tests/pecl63142.phpt] ===================================================================== TIME END 2020-06-09 16:01:05 ===================================================================== TEST RESULT SUMMARY --------------------------------------------------------------------- Exts skipped : 0 Exts tested : 61 --------------------------------------------------------------------- Number of tests : 74 70 Tests skipped : 4 ( 5.4%) -------- Tests warned : 0 ( 0.0%) ( 0.0%) Tests failed : 2 ( 2.7%) ( 2.9%) Expected fail : 0 ( 0.0%) ( 0.0%) Tests passed : 68 ( 91.9%) ( 97.1%) --------------------------------------------------------------------- Time taken : 10 seconds ===================================================================== ===================================================================== FAILED TEST SUMMARY --------------------------------------------------------------------- memcache::connect() with unix domain socket [tests/035.phpt] ini_set('session.save_handler') with unix domain socket [tests/053.phpt] =====================================================================

…

________________________________ Da: Tyson Andre <[email protected]> Inviato: martedì 9 giugno 2020 17:45 A: websupport-sk/pecl-memcache <[email protected]> Cc: nicolacontu <[email protected]>; Author <[email protected]> Oggetto: Re: [websupport-sk/pecl-memcache] PHP 7.3.17 segmentation fault (#70) Hi - Not a maintainer, but at a glance, it looks like you need to start memcached on port 11212 as well to run the tests that failed. You probably already have one running on port 11211. See https://github.com/websupport-sk/pecl-memcache/blob/NON_BLOCKING_IO_php7/tests/connect.inc#L17-L18 — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub<#70 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/ADCZTEIHVSU4EQBKVZSWKZDRVZKJFANCNFSM4NZKPO3Q>.

[TysonAndre]

---------------------------------------------------------------------
memcache::connect() with unix domain socket [tests/035.phpt]
ini_set('session.save_handler') with unix domain socket [tests/053.phpt]

$domainsocket = 'unix:///var/run/memcached/memcached.sock';

The tests are unrelated to the segfault. You need to mkdir -p /var/run/memcached and memcached -s /var/run/memcached/memcached.sock to run those tests.

t might be useful if the test scripts skip if those memcached servers don't exist, but that's up to the maintainers to decide

@nicolacontu

1. How was PHP being run when it segfaulted? If it was a web server, what type of webserver (apache? php-fpm? other?)
2. What memcached server/proxy software (and version) were you connecting to?
3. Can you provide a core dump (e.g. https://bugs.php.net/bugs-generating-backtrace.php - instructions may vary based on server software and os versions)
4. How is "memcache" being used? Is this pecl module used for sessions through the session handler?

[nicolacontu]

1. apache 2.4.43 2. memcached 1.4.34 but I also tried 1.6.6 on localhost * session.save_handler = memcache session.save_path = 'tcp://127.0.0.1:11211' 3. attached the segmentation fault 4. we have memcached as server, memcache compiled for php 7.3.17 with the memcache module. I tried to dowload it from pecl, from git. Same result. We use it for sessions and to write a single variable. Thanks

…

________________________________ Da: Tyson Andre <[email protected]> Inviato: martedì 9 giugno 2020 19:36 A: websupport-sk/pecl-memcache <[email protected]> Cc: nicolacontu <[email protected]>; Mention <[email protected]> Oggetto: Re: [websupport-sk/pecl-memcache] PHP 7.3.17 segmentation fault (#70)

--------------------------------------------------------------------- memcache::connect() with unix domain socket [tests/035.phpt] ini_set('session.save_handler') with unix domain socket [tests/053.phpt] $domainsocket = 'unix:///var/run/memcached/memcached.sock'; The tests are unrelated to the segfault. You need to mkdir -p /var/run/memcached and memcached -s /var/run/memcached/memcached.sock to run those tests. t might be useful if the test scripts skip if those memcached servers don't exist, but that's up to the maintainers to decide @nicolacontu<https://github.com/nicolacontu> 1. How was PHP being run when it segfaulted? If it was a web server, what type of webserver (apache? php-fpm? other?) 2. What memcached server/proxy software (and version) were you connecting to? 3. Can you provide a core dump (e.g. https://bugs.php.net/bugs-generating-backtrace.php - instructions may vary based on server software and os versions) 4. How is "memcache" being used? Is this pecl module used for sessions through the session handler? — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub<#70 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/ADCZTEPZ5ASXYP733FWRSCLRVZXJHANCNFSM4NZKPO3Q>. [20200610 10:47 1003 [email protected]:~]# gdb /usr/local/apache2/bin/httpd GNU gdb (GDB) Red Hat Enterprise Linux 7.6.1-119.el7 Copyright (C) 2013 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-redhat-linux-gnu". For bug reporting instructions, please see: <http://www.gnu.org/software/gdb/bugs/>... Reading symbols from /usr/local/httpd-2.4.43/bin/httpd...done. (gdb) run -X Starting program: /usr/local/apache2/bin/httpd -X [Thread debugging using libthread_db enabled] Using host libthread_db library "/usr/lib64/libthread_db.so.1". [New Thread 0x7fffd7bdd700 (LWP 8272)] [New Thread 0x7fffd73dc700 (LWP 8273)] [New Thread 0x7fffd6bdb700 (LWP 8274)] [New Thread 0x7fffd63da700 (LWP 8275)] [New Thread 0x7fffd5bd9700 (LWP 8276)] [New Thread 0x7fffd53d8700 (LWP 8277)] [New Thread 0x7fffd4bd7700 (LWP 8278)] [New Thread 0x7fffcffff700 (LWP 8279)] [New Thread 0x7fffcf7fe700 (LWP 8280)] [New Thread 0x7fffceffd700 (LWP 8281)] [New Thread 0x7fffce7fc700 (LWP 8282)] [New Thread 0x7fffcdffb700 (LWP 8283)] [New Thread 0x7fffcd7fa700 (LWP 8284)] [New Thread 0x7fffccff9700 (LWP 8285)] [New Thread 0x7fffcc7f8700 (LWP 8286)] [New Thread 0x7fffcbff7700 (LWP 8287)] [New Thread 0x7fffcb7f6700 (LWP 8288)] [New Thread 0x7fffcaff5700 (LWP 8289)] [New Thread 0x7fffca7f4700 (LWP 8290)] [New Thread 0x7fffc9ff3700 (LWP 8291)] [New Thread 0x7fffc97f2700 (LWP 8292)] [New Thread 0x7fffc8ff1700 (LWP 8293)] [New Thread 0x7fffc87f0700 (LWP 8294)] [New Thread 0x7fffc7fef700 (LWP 8295)] [New Thread 0x7fffc77ee700 (LWP 8296)] [New Thread 0x7fffc6fed700 (LWP 8297)] [New Thread 0x7fffc67ec700 (LWP 8298)] [Thread 0x7fffd7bdd700 (LWP 8272) exited] Program received signal SIGSEGV, Segmentation fault. [Switching to Thread 0x7fffc77ee700 (LWP 8296)] 0x00007ffff6a2a691 in __strlen_sse2_pminub () from /usr/lib64/libc.so.6 Missing separate debuginfos, use: debuginfo-install aspell-0.60.6.1-9.el7.x86_64 audit-libs-2.8.5-4.el7.x86_64 bzip2-libs-1.0.6-13.el7.x86_64 cairo-1.15.12-4.el7.x86_64 cyrus-sasl-lib-2.1.26-23.el7.x86_64 elfutils-libelf-0.176-4.el7.x86_64 elfutils-libs-0.176-4.el7.x86_64 expat-2.1.0-11.el7.x86_64 fontconfig-2.13.0-4.3.el7.x86_64 freetype-2.8-14.el7.x86_64 fribidi-1.0.2-1.el7_7.1.x86_64 gdbm-1.10-8.el7.x86_64 glib2-2.56.1-5.el7.x86_64 glibc-2.17-307.el7.1.x86_64 gmp-6.0.0-15.el7.x86_64 graphite2-1.3.10-1.el7_3.x86_64 harfbuzz-1.7.5-2.el7.x86_64 keyutils-libs-1.5.8-3.el7.x86_64 krb5-libs-1.15.1-46.el7.x86_64 libX11-1.6.7-2.el7.x86_64 libXau-1.0.8-2.1.el7.x86_64 libXext-1.3.3-3.el7.x86_64 libXrender-0.9.10-1.el7.x86_64 libaio-0.3.109-13.el7.x86_64 libattr-2.4.46-13.el7.x86_64 libc-client-2007f-16.el7.x86_64 libcap-2.22-11.el7.x86_64 libcap-ng-0.7.5-4.el7.x86_64 libcom_err-1.42.9-17.el7.x86_64 libcurl-7.65.3-4.0.cf.rhel7.x86_64 libffi-3.0.13-19.el7.x86_64 libgcc-4.8.5-39.el7.x86_64 libgcrypt-1.5.3-14.el7.x86_64 libglvnd-1.0.1-0.8.git5baa1e5.el7.x86_64 libglvnd-egl-1.0.1-0.8.git5baa1e5.el7.x86_64 libglvnd-glx-1.0.1-0.8.git5baa1e5.el7.x86_64 libgpg-error-1.12-3.el7.x86_64 libicu-50.2-4.el7_7.x86_64 libjpeg-turbo-1.2.90-8.el7.x86_64 libnghttp2-1.31.1-2.el7.x86_64 libpng-1.5.13-7.el7_2.x86_64 libpsl-0.7.0-1.el7.x86_64 libselinux-2.5-15.el7.x86_64 libssh2-1.9.0-2.0.cf.rhel7.x86_64 libstdc++-4.8.5-39.el7.x86_64 libthai-0.1.14-9.el7.x86_64 libtool-ltdl-2.4.2-22.el7_3.x86_64 libuuid-2.23.2-63.el7.x86_64 libwbclient-4.10.4-11.el7_8.x86_64 libxcb-1.13-1.el7.x86_64 libxml2-2.9.1-6.el7.4.x86_64 libxslt-1.1.28-5.el7.x86_64 nspr-4.21.0-1.el7.x86_64 nss-3.44.0-7.el7_7.x86_64 nss-softokn-freebl-3.44.0-8.el7_7.x86_64 nss-util-3.44.0-4.el7_7.x86_64 openldap-2.4.44-21.el7_6.x86_64 openssl-libs-1.0.2k-19.el7.x86_64 pam-1.1.8-23.el7.x86_64 pango-1.42.4-4.el7_7.x86_64 pcre-8.32-17.el7.x86_64 pixman-0.34.0-1.el7.x86_64 rrdtool-1.4.8-9.el7.x86_64 samba-client-libs-4.10.4-11.el7_8.x86_64 samba-winbind-modules-4.10.4-11.el7_8.x86_64 systemd-libs-219-73.el7_8.5.x86_64 unixODBC-2.3.1-14.el7.x86_64 xz-libs-5.2.2-1.el7.x86_64 zlib-1.2.7-18.el7.x86_64 (gdb) quit

[TysonAndre]

1. It would help if you attach the output of (gdb) bt to print the backtrace of that. To get a useful backtrace, installing debugging info would help get line numbers and file names, but that doesn't seem to include php, so it probably wouldn't help much.

   Missing separate debuginfos, use: debuginfo-install aspell-0.60.6.1-9.el7.x86_64 audit-libs-2.8.5-4.el7.x86_64 bzip2-libs-1.0.6-13.el7.x86_64 cairo-1.15.12-4.el7.x86_64 cyrus-sasl-lib-2.1.26-23.el7.x86_64 elfutils-libelf-0.176-4.el7.x86_64 elfutils-libs-0.176-4.el7.x86_64 expat-2.1.0-11.el7.x86_64 fontconfig-2.13.0-4.3.el7.x86_64 freetype-2.8-14.el7.x86_64 fribidi-1.0.2-1.el7_7.1.x86_64 gdbm-1.10-8.el7.x86_64 glib2-2.56.1-5.el7.x86_64 glibc-2.17-307.el7.1.x86_64 gmp-6.0.0-15.el7.x86_64 graphite2-1.3.10-1.el7_3.x86_64 harfbuzz-1.7.5-2.el7.x86_64 keyutils-libs-1.5.8-3.el7.x86_64 krb5-libs-1.15.1-46.el7.x86_64 libX11-1.6.7-2.el7.x86_64 libXau-1.0.8-2.1.el7.x86_64 libXext-1.3.3-3.el7.x86_64 libXrender-0.9.10-1.el7.x86_64 libaio-0.3.109-13.el7.x86_64 libattr-2.4.46-13.el7.x86_64 libc-client-2007f-16.el7.x86_64 libcap-2.22-11.el7.x86_64 libcap-ng-0.7.5-4.el7.x86_64 libcom_err-1.42.9-17.el7.x86_64 libcurl-7.65.3-4.0.cf.rhel7.x86_64 libffi-3.0.13-19.el7.x86_64 libgcc-4.8.5-39.el7.x86_64 libgcrypt-1.5.3-14.el7.x86_64 libglvnd-1.0.1-0.8.git5baa1e5.el7.x86_64 libglvnd-egl-1.0.1-0.8.git5baa1e5.el7.x86_64 libglvnd-glx-1.0.1-0.8.git5baa1e5.el7.x86_64 libgpg-error-1.12-3.el7.x86_64 libicu-50.2-4.el7_7.x86_64 libjpeg-turbo-1.2.90-8.el7.x86_64 libnghttp2-1.31.1-2.el7.x86_64 libpng-1.5.13-7.el7_2.x86_64 libpsl-0.7.0-1.el7.x86_64 libselinux-2.5-15.el7.x86_64 libssh2-1.9.0-2.0.cf.rhel7.x86_64 libstdc++-4.8.5-39.el7.x86_64 libthai-0.1.14-9.el7.x86_64 libtool-ltdl-2.4.2-22.el7_3.x86_64 libuuid-2.23.2-63.el7.x86_64 libwbclient-4.10.4-11.el7_8.x86_64 libxcb-1.13-1.el7.x86_64 libxml2-2.9.1-6.el7.4.x86_64 libxslt-1.1.28-5.el7.x86_64 nspr-4.21.0-1.el7.x86_64 nss-3.44.0-7.el7_7.x86_64 nss-softokn-freebl-3.44.0-8.el7_7.x86_64 nss-util-3.44.0-4.el7_7.x86_64 openldap-2.4.44-21.el7_6.x86_64 openssl-libs-1.0.2k-19.el7.x86_64 pam-1.1.8-23.el7.x86_64 pango-1.42.4-4.el7_7.x86_64 pcre-8.32-17.el7.x86_64 pixman-0.34.0-1.el7.x86_64 rrdtool-1.4.8-9.el7.x86_64 samba-client-libs-4.10.4-11.el7_8.x86_64 samba-winbind-modules-4.10.4-11.el7_8.x86_64 systemd-libs-219-73.el7_8.5.x86_64 unixODBC-2.3.1-14.el7.x86_64 xz-libs-5.2.2-1.el7.x86_64 zlib-1.2.7-18.el7.x86_64

2. What mpm module are you using? At a glance at the gdb output, I'm guessing you're using a threaded one (I'm not very familiar with apache's internals). Which mpm module are you using? Does the issue go away if you switch to prefork? (Knowing if an issue is limited to threaded apache will help maintainers diagnose/fix this)

For example, my centos config in /etc/httpd/conf.modules.d/00-mpm.conf is using mpm_prefork_module. It'll probably be in a folder starting with /etc/httpd or /etc/apache, which varies based on OS (grep -Ri for mpm)

# Select the MPM module which should be used by uncommenting exactly
# one of the following LoadModule lines:

# prefork MPM: Implements a non-threaded, pre-forking web server
# See: http://httpd.apache.org/docs/2.4/mod/prefork.html
LoadModule mpm_prefork_module modules/mod_mpm_prefork.so

# worker MPM: Multi-Processing Module implementing a hybrid
# multi-threaded multi-process web server
# See: http://httpd.apache.org/docs/2.4/mod/worker.html
#
#LoadModule mpm_worker_module modules/mod_mpm_worker.so

# event MPM: A variant of the worker MPM with the goal of consuming
# threads only for connections with active processing
# See: http://httpd.apache.org/docs/2.4/mod/event.html
#
#LoadModule mpm_event_module modules/mod_mpm_event.so

[TysonAndre]

I'd have thought it might be due to servers getting shared somehow, but I'm unfamiliar with the codebase. The memcache server string (tcp://) doesn't have persistent (which is correct if threads are used), and it looks like memcache shouldn't be sharing servers/pool structs at a glance.

[nicolacontu]

1. Program received signal SIGSEGV, Segmentation fault. [Switching to Thread 0x7fffc6fed700 (LWP 14898)] 0x00007ffff6a2a691 in __strlen_sse2_pminub () from /usr/lib64/libc.so.6 Missing separate debuginfos, use: debuginfo-install aspell-0.60.6.1-9.el7.x86_64 audit-libs-2.8.5-4.el7.x86_64 bzip2-libs-1.0.6-13.el7.x86_64 cairo-1.15.12-4.el7.x86_64 cyrus-sasl-lib-2.1.26-23.el7.x86_64 expat-2.1.0-11.el7.x86_64 fontconfig-2.13.0-4.3.el7.x86_64 freetype-2.8-14.el7.x86_64 fribidi-1.0.2-1.el7_7.1.x86_64 gdbm-1.10-8.el7.x86_64 glib2-2.56.1-5.el7.x86_64 glibc-2.17-307.el7.1.x86_64 gmp-6.0.0-15.el7.x86_64 graphite2-1.3.10-1.el7_3.x86_64 harfbuzz-1.7.5-2.el7.x86_64 keyutils-libs-1.5.8-3.el7.x86_64 krb5-libs-1.15.1-46.el7.x86_64 libX11-1.6.7-2.el7.x86_64 libXau-1.0.8-2.1.el7.x86_64 libXext-1.3.3-3.el7.x86_64 libXrender-0.9.10-1.el7.x86_64 libaio-0.3.109-13.el7.x86_64 libc-client-2007f-16.el7.x86_64 libcap-ng-0.7.5-4.el7.x86_64 libcom_err-1.42.9-17.el7.x86_64 libcurl-7.65.3-4.0.cf.rhel7.x86_64 libffi-3.0.13-19.el7.x86_64 libgcc-4.8.5-39.el7.x86_64 libgcrypt-1.5.3-14.el7.x86_64 libglvnd-1.0.1-0.8.git5baa1e5.el7.x86_64 libglvnd-egl-1.0.1-0.8.git5baa1e5.el7.x86_64 libglvnd-glx-1.0.1-0.8.git5baa1e5.el7.x86_64 libgpg-error-1.12-3.el7.x86_64 libicu-50.2-4.el7_7.x86_64 libjpeg-turbo-1.2.90-8.el7.x86_64 libnghttp2-1.31.1-2.el7.x86_64 libpng-1.5.13-7.el7_2.x86_64 libpsl-0.7.0-1.el7.x86_64 libselinux-2.5-15.el7.x86_64 libssh2-1.9.0-2.0.cf.rhel7.x86_64 libstdc++-4.8.5-39.el7.x86_64 libthai-0.1.14-9.el7.x86_64 libtool-ltdl-2.4.2-22.el7_3.x86_64 libuuid-2.23.2-63.el7.x86_64 libwbclient-4.10.4-11.el7_8.x86_64 libxcb-1.13-1.el7.x86_64 libxml2-2.9.1-6.el7.4.x86_64 libxslt-1.1.28-5.el7.x86_64 nspr-4.21.0-1.el7.x86_64 nss-3.44.0-7.el7_7.x86_64 nss-softokn-freebl-3.44.0-8.el7_7.x86_64 nss-util-3.44.0-4.el7_7.x86_64 openldap-2.4.44-21.el7_6.x86_64 openssl-libs-1.0.2k-19.el7.x86_64 pam-1.1.8-23.el7.x86_64 pango-1.42.4-4.el7_7.x86_64 pcre-8.32-17.el7.x86_64 pixman-0.34.0-1.el7.x86_64 rrdtool-1.4.8-9.el7.x86_64 samba-client-libs-4.10.4-11.el7_8.x86_64 samba-winbind-modules-4.10.4-11.el7_8.x86_64 unixODBC-2.3.1-14.el7.x86_64 xz-libs-5.2.2-1.el7.x86_64 zlib-1.2.7-18.el7.x86_64 (gdb) bt #0 0x00007ffff6a2a691 in __strlen_sse2_pminub () from /usr/lib64/libc.so.6 #1 0x00007fffde3c81a1 in mmc_prepare_key_ex (key=0x7fffc5c62018 "c5edd8d709ec4cf6c788b4843c577f2a", key_len=32, result=result@entry=0x7fffc5c7c648 "", result_len=result_len@entry=0x7fffc5c7c744, prefix=0x4d0000000e <Address 0x4d0000000e out of bounds>) at /root/downloads/memcache-4.0.5.2/php7/memcache_pool.c:1664 #2 0x00007fffde3ccbb3 in php_mmc_session_read_request (datareq=<synthetic pointer>, addreq=<synthetic pointer>, lockreq=<synthetic pointer>, dataparam=0x7fffc6fec920, addparam=0x7fffc6fec8c0, lockparam=0x7fffc6fec900, zkey=0x7fffc6fec8e0, pool=0x7fffc5c6f000) at /root/downloads/memcache-4.0.5.2/php7/memcache_session.c:252 #3 ps_read_memcache (mod_data=<optimized out>, key=<optimized out>, val=0x7fffc6fec9a8, maxlifetime=<optimized out>) at /root/downloads/memcache-4.0.5.2/php7/memcache_session.c:323 #4 0x00007ffff0fcefca in php_session_initialize () at /root/downloads/php-7.3.17/ext/session/session.c:439 #5 0x00007ffff0fcfa0c in php_session_start () at /root/downloads/php-7.3.17/ext/session/session.c:1604 #6 0x00007ffff0fd02f5 in php_rinit_session (auto_start=<optimized out>) at /root/downloads/php-7.3.17/ext/session/session.c:2870 #7 0x00007ffff1169090 in zend_activate_modules () at /root/downloads/php-7.3.17/Zend/zend_API.c:2611 #8 0x00007ffff10f587e in php_request_startup () at /root/downloads/php-7.3.17/main/main.c:1829 #9 0x00007ffff11f4585 in php_apache_request_ctor (r=r@entry=0x7fffc001c9f0, ctx=<optimized out>) at /root/downloads/php-7.3.17/sapi/apache2handler/sapi_apache2.c:534 #10 0x00007ffff11f4f48 in php_handler (r=0x7fffc001c9f0) at /root/downloads/php-7.3.17/sapi/apache2handler/sapi_apache2.c:650 #11 0x00000000004525a0 in ap_run_handler (r=r@entry=0x7fffc001c9f0) at config.c:170 #12 0x0000000000452ae9 in ap_invoke_handler (r=r@entry=0x7fffc001c9f0) at config.c:444 #13 0x00000000004679aa in ap_process_async_request (r=0x7fffc001c9f0) at http_request.c:452 #14 0x0000000000464088 in ap_process_http_async_connection (c=0x7fffd0052d48) at http_core.c:158 #15 ap_process_http_connection (c=0x7fffd0052d48) at http_core.c:252 #16 0x000000000045b790 in ap_run_process_connection (c=c@entry=0x7fffd0052d48) at connection.c:42 #17 0x000000000046f21a in process_socket (thd=<optimized out>, p=<optimized out>, sock=<optimized out>, cs=0x7fffd0052ca0, my_child_num=<optimized out>, my_thread_num=<optimized out>) at event.c:1050 #18 0x0000000000470598 in worker_thread (thd=0x6d1908, dummy=<optimized out>) at event.c:2083 #19 0x00007ffff6e94ea5 in start_thread () from /usr/lib64/libpthread.so.0 #20 0x00007ffff69b98dd in clone () from /usr/lib64/libc.so.6 2. apache is compiled and it is uses the default one. it should be prefork.

…

________________________________ Da: Tyson Andre <[email protected]> Inviato: mercoledì 10 giugno 2020 16:50 A: websupport-sk/pecl-memcache <[email protected]> Cc: nicolacontu <[email protected]>; Mention <[email protected]> Oggetto: Re: [websupport-sk/pecl-memcache] PHP 7.3.17 segmentation fault (#70) 1. It would help if you attach the output of (gdb) bt to print the backtrace of that. To get a useful backtrace, installing debugging info would help get line numbers and file names, but that doesn't seem to include php, so it probably wouldn't help much. Missing separate debuginfos, use: debuginfo-install aspell-0.60.6.1-9.el7.x86_64 audit-libs-2.8.5-4.el7.x86_64 bzip2-libs-1.0.6-13.el7.x86_64 cairo-1.15.12-4.el7.x86_64 cyrus-sasl-lib-2.1.26-23.el7.x86_64 elfutils-libelf-0.176-4.el7.x86_64 elfutils-libs-0.176-4.el7.x86_64 expat-2.1.0-11.el7.x86_64 fontconfig-2.13.0-4.3.el7.x86_64 freetype-2.8-14.el7.x86_64 fribidi-1.0.2-1.el7_7.1.x86_64 gdbm-1.10-8.el7.x86_64 glib2-2.56.1-5.el7.x86_64 glibc-2.17-307.el7.1.x86_64 gmp-6.0.0-15.el7.x86_64 graphite2-1.3.10-1.el7_3.x86_64 harfbuzz-1.7.5-2.el7.x86_64 keyutils-libs-1.5.8-3.el7.x86_64 krb5-libs-1.15.1-46.el7.x86_64 libX11-1.6.7-2.el7.x86_64 libXau-1.0.8-2.1.el7.x86_64 libXext-1.3.3-3.el7.x86_64 libXrender-0.9.10-1.el7.x86_64 libaio-0.3.109-13.el7.x86_64 libattr-2.4.46-13.el7.x86_64 libc-client-2007f-16.el7.x86_64 libcap-2.22-11.el7.x86_64 libcap-ng-0.7.5-4.el7.x86_64 libcom_err-1.42.9-17.el7.x86_64 libcurl-7.65.3-4.0.cf.rhel7.x86_64 libffi-3.0.13-19.el7.x86_64 libgcc-4.8.5-39.el7.x86_64 libgcrypt-1.5.3-14.el7.x86_64 libglvnd-1.0.1-0.8.git5baa1e5.el7.x86_64 libglvnd-egl-1.0.1-0.8.git5baa1e5.el7.x86_64 libglvnd-glx-1.0.1-0.8.git5baa1e5.el7.x86_64 libgpg-error-1.12-3.el7.x86_64 libicu-50.2-4.el7_7.x86_64 libjpeg-turbo-1.2.90-8.el7.x86_64 libnghttp2-1.31.1-2.el7.x86_64 libpng-1.5.13-7.el7_2.x86_64 libpsl-0.7.0-1.el7.x86_64 libselinux-2.5-15.el7.x86_64 libssh2-1.9.0-2.0.cf.rhel7.x86_64 libstdc++-4.8.5-39.el7.x86_64 libthai-0.1.14-9.el7.x86_64 libtool-ltdl-2.4.2-22.el7_3.x86_64 libuuid-2.23.2-63.el7.x86_64 libwbclient-4.10.4-11.el7_8.x86_64 libxcb-1.13-1.el7.x86_64 libxml2-2.9.1-6.el7.4.x86_64 libxslt-1.1.28-5.el7.x86_64 nspr-4.21.0-1.el7.x86_64 nss-3.44.0-7.el7_7.x86_64 nss-softokn-freebl-3.44.0-8.el7_7.x86_64 nss-util-3.44.0-4.el7_7.x86_64 openldap-2.4.44-21.el7_6.x86_64 openssl-libs-1.0.2k-19.el7.x86_64 pam-1.1.8-23.el7.x86_64 pango-1.42.4-4.el7_7.x86_64 pcre-8.32-17.el7.x86_64 pixman-0.34.0-1.el7.x86_64 rrdtool-1.4.8-9.el7.x86_64 samba-client-libs-4.10.4-11.el7_8.x86_64 samba-winbind-modules-4.10.4-11.el7_8.x86_64 systemd-libs-219-73.el7_8.5.x86_64 unixODBC-2.3.1-14.el7.x86_64 xz-libs-5.2.2-1.el7.x86_64 zlib-1.2.7-18.el7.x86_64 2. What mpm module are you using? At a glance at the gdb output, I'm guessing you're using a threaded one (I'm not very familiar with apache's internals). Which mpm module are you using? Does the issue go away if you switch to prefork? (Knowing if an issue is limited to threaded apache will help maintainers diagnose/fix this) For example, my centos config in /etc/httpd/conf.modules.d/00-mpm.conf is using mpm_prefork_module. It'll probably be in a folder starting with /etc/httpd or /etc/apache, which varies based on OS (grep -Ri for mpm) # Select the MPM module which should be used by uncommenting exactly # one of the following LoadModule lines: # prefork MPM: Implements a non-threaded, pre-forking web server # See: http://httpd.apache.org/docs/2.4/mod/prefork.html LoadModule mpm_prefork_module modules/mod_mpm_prefork.so # worker MPM: Multi-Processing Module implementing a hybrid # multi-threaded multi-process web server # See: http://httpd.apache.org/docs/2.4/mod/worker.html # #LoadModule mpm_worker_module modules/mod_mpm_worker.so # event MPM: A variant of the worker MPM with the goal of consuming # threads only for connections with active processing # See: http://httpd.apache.org/docs/2.4/mod/event.html # #LoadModule mpm_event_module modules/mod_mpm_event.so — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub<#70 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/ADCZTEL3CKVJU7JNFER6BV3RV6MUPANCNFSM4NZKPO3Q>.

[nicolacontu]

I was able to take a look at the MPM module : MPM Name: event MPM Information: Max Daemons: 3 Threaded: yes Forked: yes

…

________________________________ Da: Nicola Contu <[email protected]> Inviato: mercoledì 10 giugno 2020 17:38 A: websupport-sk/pecl-memcache <[email protected]>; websupport-sk/pecl-memcache <[email protected]> Cc: Mention <[email protected]> Oggetto: R: [websupport-sk/pecl-memcache] PHP 7.3.17 segmentation fault (#70) 1. Program received signal SIGSEGV, Segmentation fault. [Switching to Thread 0x7fffc6fed700 (LWP 14898)] 0x00007ffff6a2a691 in __strlen_sse2_pminub () from /usr/lib64/libc.so.6 Missing separate debuginfos, use: debuginfo-install aspell-0.60.6.1-9.el7.x86_64 audit-libs-2.8.5-4.el7.x86_64 bzip2-libs-1.0.6-13.el7.x86_64 cairo-1.15.12-4.el7.x86_64 cyrus-sasl-lib-2.1.26-23.el7.x86_64 expat-2.1.0-11.el7.x86_64 fontconfig-2.13.0-4.3.el7.x86_64 freetype-2.8-14.el7.x86_64 fribidi-1.0.2-1.el7_7.1.x86_64 gdbm-1.10-8.el7.x86_64 glib2-2.56.1-5.el7.x86_64 glibc-2.17-307.el7.1.x86_64 gmp-6.0.0-15.el7.x86_64 graphite2-1.3.10-1.el7_3.x86_64 harfbuzz-1.7.5-2.el7.x86_64 keyutils-libs-1.5.8-3.el7.x86_64 krb5-libs-1.15.1-46.el7.x86_64 libX11-1.6.7-2.el7.x86_64 libXau-1.0.8-2.1.el7.x86_64 libXext-1.3.3-3.el7.x86_64 libXrender-0.9.10-1.el7.x86_64 libaio-0.3.109-13.el7.x86_64 libc-client-2007f-16.el7.x86_64 libcap-ng-0.7.5-4.el7.x86_64 libcom_err-1.42.9-17.el7.x86_64 libcurl-7.65.3-4.0.cf.rhel7.x86_64 libffi-3.0.13-19.el7.x86_64 libgcc-4.8.5-39.el7.x86_64 libgcrypt-1.5.3-14.el7.x86_64 libglvnd-1.0.1-0.8.git5baa1e5.el7.x86_64 libglvnd-egl-1.0.1-0.8.git5baa1e5.el7.x86_64 libglvnd-glx-1.0.1-0.8.git5baa1e5.el7.x86_64 libgpg-error-1.12-3.el7.x86_64 libicu-50.2-4.el7_7.x86_64 libjpeg-turbo-1.2.90-8.el7.x86_64 libnghttp2-1.31.1-2.el7.x86_64 libpng-1.5.13-7.el7_2.x86_64 libpsl-0.7.0-1.el7.x86_64 libselinux-2.5-15.el7.x86_64 libssh2-1.9.0-2.0.cf.rhel7.x86_64 libstdc++-4.8.5-39.el7.x86_64 libthai-0.1.14-9.el7.x86_64 libtool-ltdl-2.4.2-22.el7_3.x86_64 libuuid-2.23.2-63.el7.x86_64 libwbclient-4.10.4-11.el7_8.x86_64 libxcb-1.13-1.el7.x86_64 libxml2-2.9.1-6.el7.4.x86_64 libxslt-1.1.28-5.el7.x86_64 nspr-4.21.0-1.el7.x86_64 nss-3.44.0-7.el7_7.x86_64 nss-softokn-freebl-3.44.0-8.el7_7.x86_64 nss-util-3.44.0-4.el7_7.x86_64 openldap-2.4.44-21.el7_6.x86_64 openssl-libs-1.0.2k-19.el7.x86_64 pam-1.1.8-23.el7.x86_64 pango-1.42.4-4.el7_7.x86_64 pcre-8.32-17.el7.x86_64 pixman-0.34.0-1.el7.x86_64 rrdtool-1.4.8-9.el7.x86_64 samba-client-libs-4.10.4-11.el7_8.x86_64 samba-winbind-modules-4.10.4-11.el7_8.x86_64 unixODBC-2.3.1-14.el7.x86_64 xz-libs-5.2.2-1.el7.x86_64 zlib-1.2.7-18.el7.x86_64 (gdb) bt #0 0x00007ffff6a2a691 in __strlen_sse2_pminub () from /usr/lib64/libc.so.6 #1 0x00007fffde3c81a1 in mmc_prepare_key_ex (key=0x7fffc5c62018 "c5edd8d709ec4cf6c788b4843c577f2a", key_len=32, result=result@entry=0x7fffc5c7c648 "", result_len=result_len@entry=0x7fffc5c7c744, prefix=0x4d0000000e <Address 0x4d0000000e out of bounds>) at /root/downloads/memcache-4.0.5.2/php7/memcache_pool.c:1664 #2 0x00007fffde3ccbb3 in php_mmc_session_read_request (datareq=<synthetic pointer>, addreq=<synthetic pointer>, lockreq=<synthetic pointer>, dataparam=0x7fffc6fec920, addparam=0x7fffc6fec8c0, lockparam=0x7fffc6fec900, zkey=0x7fffc6fec8e0, pool=0x7fffc5c6f000) at /root/downloads/memcache-4.0.5.2/php7/memcache_session.c:252 #3 ps_read_memcache (mod_data=<optimized out>, key=<optimized out>, val=0x7fffc6fec9a8, maxlifetime=<optimized out>) at /root/downloads/memcache-4.0.5.2/php7/memcache_session.c:323 #4 0x00007ffff0fcefca in php_session_initialize () at /root/downloads/php-7.3.17/ext/session/session.c:439 #5 0x00007ffff0fcfa0c in php_session_start () at /root/downloads/php-7.3.17/ext/session/session.c:1604 #6 0x00007ffff0fd02f5 in php_rinit_session (auto_start=<optimized out>) at /root/downloads/php-7.3.17/ext/session/session.c:2870 #7 0x00007ffff1169090 in zend_activate_modules () at /root/downloads/php-7.3.17/Zend/zend_API.c:2611 #8 0x00007ffff10f587e in php_request_startup () at /root/downloads/php-7.3.17/main/main.c:1829 #9 0x00007ffff11f4585 in php_apache_request_ctor (r=r@entry=0x7fffc001c9f0, ctx=<optimized out>) at /root/downloads/php-7.3.17/sapi/apache2handler/sapi_apache2.c:534 #10 0x00007ffff11f4f48 in php_handler (r=0x7fffc001c9f0) at /root/downloads/php-7.3.17/sapi/apache2handler/sapi_apache2.c:650 #11 0x00000000004525a0 in ap_run_handler (r=r@entry=0x7fffc001c9f0) at config.c:170 #12 0x0000000000452ae9 in ap_invoke_handler (r=r@entry=0x7fffc001c9f0) at config.c:444 #13 0x00000000004679aa in ap_process_async_request (r=0x7fffc001c9f0) at http_request.c:452 #14 0x0000000000464088 in ap_process_http_async_connection (c=0x7fffd0052d48) at http_core.c:158 #15 ap_process_http_connection (c=0x7fffd0052d48) at http_core.c:252 #16 0x000000000045b790 in ap_run_process_connection (c=c@entry=0x7fffd0052d48) at connection.c:42 #17 0x000000000046f21a in process_socket (thd=<optimized out>, p=<optimized out>, sock=<optimized out>, cs=0x7fffd0052ca0, my_child_num=<optimized out>, my_thread_num=<optimized out>) at event.c:1050 #18 0x0000000000470598 in worker_thread (thd=0x6d1908, dummy=<optimized out>) at event.c:2083 #19 0x00007ffff6e94ea5 in start_thread () from /usr/lib64/libpthread.so.0 #20 0x00007ffff69b98dd in clone () from /usr/lib64/libc.so.6 2. apache is compiled and it is uses the default one. it should be prefork.

________________________________ Da: Tyson Andre <[email protected]> Inviato: mercoledì 10 giugno 2020 16:50 A: websupport-sk/pecl-memcache <[email protected]> Cc: nicolacontu <[email protected]>; Mention <[email protected]> Oggetto: Re: [websupport-sk/pecl-memcache] PHP 7.3.17 segmentation fault (#70) 1. It would help if you attach the output of (gdb) bt to print the backtrace of that. To get a useful backtrace, installing debugging info would help get line numbers and file names, but that doesn't seem to include php, so it probably wouldn't help much. Missing separate debuginfos, use: debuginfo-install aspell-0.60.6.1-9.el7.x86_64 audit-libs-2.8.5-4.el7.x86_64 bzip2-libs-1.0.6-13.el7.x86_64 cairo-1.15.12-4.el7.x86_64 cyrus-sasl-lib-2.1.26-23.el7.x86_64 elfutils-libelf-0.176-4.el7.x86_64 elfutils-libs-0.176-4.el7.x86_64 expat-2.1.0-11.el7.x86_64 fontconfig-2.13.0-4.3.el7.x86_64 freetype-2.8-14.el7.x86_64 fribidi-1.0.2-1.el7_7.1.x86_64 gdbm-1.10-8.el7.x86_64 glib2-2.56.1-5.el7.x86_64 glibc-2.17-307.el7.1.x86_64 gmp-6.0.0-15.el7.x86_64 graphite2-1.3.10-1.el7_3.x86_64 harfbuzz-1.7.5-2.el7.x86_64 keyutils-libs-1.5.8-3.el7.x86_64 krb5-libs-1.15.1-46.el7.x86_64 libX11-1.6.7-2.el7.x86_64 libXau-1.0.8-2.1.el7.x86_64 libXext-1.3.3-3.el7.x86_64 libXrender-0.9.10-1.el7.x86_64 libaio-0.3.109-13.el7.x86_64 libattr-2.4.46-13.el7.x86_64 libc-client-2007f-16.el7.x86_64 libcap-2.22-11.el7.x86_64 libcap-ng-0.7.5-4.el7.x86_64 libcom_err-1.42.9-17.el7.x86_64 libcurl-7.65.3-4.0.cf.rhel7.x86_64 libffi-3.0.13-19.el7.x86_64 libgcc-4.8.5-39.el7.x86_64 libgcrypt-1.5.3-14.el7.x86_64 libglvnd-1.0.1-0.8.git5baa1e5.el7.x86_64 libglvnd-egl-1.0.1-0.8.git5baa1e5.el7.x86_64 libglvnd-glx-1.0.1-0.8.git5baa1e5.el7.x86_64 libgpg-error-1.12-3.el7.x86_64 libicu-50.2-4.el7_7.x86_64 libjpeg-turbo-1.2.90-8.el7.x86_64 libnghttp2-1.31.1-2.el7.x86_64 libpng-1.5.13-7.el7_2.x86_64 libpsl-0.7.0-1.el7.x86_64 libselinux-2.5-15.el7.x86_64 libssh2-1.9.0-2.0.cf.rhel7.x86_64 libstdc++-4.8.5-39.el7.x86_64 libthai-0.1.14-9.el7.x86_64 libtool-ltdl-2.4.2-22.el7_3.x86_64 libuuid-2.23.2-63.el7.x86_64 libwbclient-4.10.4-11.el7_8.x86_64 libxcb-1.13-1.el7.x86_64 libxml2-2.9.1-6.el7.4.x86_64 libxslt-1.1.28-5.el7.x86_64 nspr-4.21.0-1.el7.x86_64 nss-3.44.0-7.el7_7.x86_64 nss-softokn-freebl-3.44.0-8.el7_7.x86_64 nss-util-3.44.0-4.el7_7.x86_64 openldap-2.4.44-21.el7_6.x86_64 openssl-libs-1.0.2k-19.el7.x86_64 pam-1.1.8-23.el7.x86_64 pango-1.42.4-4.el7_7.x86_64 pcre-8.32-17.el7.x86_64 pixman-0.34.0-1.el7.x86_64 rrdtool-1.4.8-9.el7.x86_64 samba-client-libs-4.10.4-11.el7_8.x86_64 samba-winbind-modules-4.10.4-11.el7_8.x86_64 systemd-libs-219-73.el7_8.5.x86_64 unixODBC-2.3.1-14.el7.x86_64 xz-libs-5.2.2-1.el7.x86_64 zlib-1.2.7-18.el7.x86_64 2. What mpm module are you using? At a glance at the gdb output, I'm guessing you're using a threaded one (I'm not very familiar with apache's internals). Which mpm module are you using? Does the issue go away if you switch to prefork? (Knowing if an issue is limited to threaded apache will help maintainers diagnose/fix this) For example, my centos config in /etc/httpd/conf.modules.d/00-mpm.conf is using mpm_prefork_module. It'll probably be in a folder starting with /etc/httpd or /etc/apache, which varies based on OS (grep -Ri for mpm) # Select the MPM module which should be used by uncommenting exactly # one of the following LoadModule lines: # prefork MPM: Implements a non-threaded, pre-forking web server # See: http://httpd.apache.org/docs/2.4/mod/prefork.html LoadModule mpm_prefork_module modules/mod_mpm_prefork.so # worker MPM: Multi-Processing Module implementing a hybrid # multi-threaded multi-process web server # See: http://httpd.apache.org/docs/2.4/mod/worker.html # #LoadModule mpm_worker_module modules/mod_mpm_worker.so # event MPM: A variant of the worker MPM with the goal of consuming # threads only for connections with active processing # See: http://httpd.apache.org/docs/2.4/mod/event.html # #LoadModule mpm_event_module modules/mod_mpm_event.so — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub<#70 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/ADCZTEL3CKVJU7JNFER6BV3RV6MUPANCNFSM4NZKPO3Q>.

[TysonAndre]

What's the full output of php --version (including NTS/ZTS)? If it's an NTS build, I don't think this module would work with mpm "Threaded: yes" - you'd need to switch to zts (a php build that supports running with threads) or to mpm prefork (to stop using threads).

The MEMCACHE_G(session_key_prefix) would be using a thread-local in ZTS but what seems like a static variable in NTS

#ifdef ZTS
#define MEMCACHE_G(v) TSRMG(memcache_globals_id, zend_memcache_globals *, v)
#else
#define MEMCACHE_G(v) (memcache_globals.v)
#endif

[TysonAndre]

2. apache is compiled and it is uses the default one. it should be prefork.
   ...
   I was able to take a look at the MPM module :

MPM Name: event

If you refer to https://httpd.apache.org/docs/2.4/mod/#core , the "event" mpm is a variation of the "worker" mpm, both of which are threaded. That is a different mpm from the non-threaded "prefork" mpm. (Not 100% sure if that is what you meant by that)

[nicolacontu]

[20200610 15:50 1058 [email protected]:/usr/local/apache2.4/conf]# php --version PHP 7.3.17 (cli) (built: May 29 2020 13:04:24) ( ZTS ) Copyright (c) 1997-2018 The PHP Group Zend Engine v3.3.17, Copyright (c) 1998-2018 Zend Technologies with Zend OPcache v7.3.17, Copyright (c) 1999-2018, by Zend Technologies

…

________________________________ Da: Tyson Andre <[email protected]> Inviato: mercoledì 10 giugno 2020 18:12 A: websupport-sk/pecl-memcache <[email protected]> Cc: nicolacontu <[email protected]>; Mention <[email protected]> Oggetto: Re: [websupport-sk/pecl-memcache] PHP 7.3.17 segmentation fault (#70) What's the full output of php --version (including NTS/ZTS)? If it's an NTS build, I don't think this module would work with mpm "Threaded: yes" - you'd need to switch to zts (a php build that supports running with threads) or to mpm prefork (to stop using threads). The MEMCACHE_G(session_key_prefix) would be using a thread-local in ZTS but what seems like a static variable in NTS #ifdef ZTS #define MEMCACHE_G(v) TSRMG(memcache_globals_id, zend_memcache_globals *, v) #else #define MEMCACHE_G(v) (memcache_globals.v) #endif — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub<#70 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/ADCZTEOLAN6D4QAGQKMU7JDRV6WIBANCNFSM4NZKPO3Q>.

[TysonAndre]

Okay, not completely sure what's causing the segfault, then

• Could be the string that MEMCACHE_G(session_key_prefix) was initially valid, but no longer became valid
• Maybe the order in which extensions are loaded matters? Does it help to put extension=memcache.so before extension=session.so (or if they're in php.d/, change the file order?) (did php_request_startup initialize session before memcache got initialized - if so, that would explain why session_key_prefix pointed to invalid memory)

[nicolacontu]

See attached. With the php.ini.working it is actually working. But honestly, I don't know why. Settings for save_path are the same. What do you think? Why is that working and the other one is not?

…

________________________________ Da: Tyson Andre <[email protected]> Inviato: mercoledì 10 giugno 2020 18:42 A: websupport-sk/pecl-memcache <[email protected]> Cc: nicolacontu <[email protected]>; Mention <[email protected]> Oggetto: Re: [websupport-sk/pecl-memcache] PHP 7.3.17 segmentation fault (#70) Okay, not completely sure what's causing the segfault, then * Could be the string that MEMCACHE_G(session_key_prefix) was initially valid, but no longer became valid * Maybe the order in which extensions are loaded matters? Does it help to put extension=memcache.so before extension=session.so (or if they're in php.d/, change the file order?) (did php_request_startup initialize session before memcache got initialized - if so, that would explain why session_key_prefix pointed to invalid memory) — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub<#70 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/ADCZTEJKWW5ASTIXHST22NDRV6ZYTANCNFSM4NZKPO3Q>.

[thesource93]

this should be fixed in recent version, closing