Segfaults after updating kopano to 8.7.80.465

Manfred

Hi John,

I setup a Debian Testing system with KC 8.6.9 and Z-Push develop branch, but there weren’t any segfaults (I tested with PHP as Apache module). Did you get segfaults on every request or in some special cases only?

Manfred

john3377

Hi Manfred!

Sorry for the late reply, but for some reason I am not receiving notifications via email.
With 8.6.9 I am not able to do testings, all I can tell is about community releases and here it does crash. No there is no special use case, just start the sync and there it directly crashes. It may be possible to receive some mails but then the task will be killed.

John

Manfred

Hi John,

I’ve upgraded my test system to KC 8.7.80.476 and still wasn’t able to reproduce it. It still syncs fine.

Did you check the kopano server.log for errors?

Manfred

john3377

Manfred,

I tried again with the following setup:
Debian_Testing updated (18-Jan-2019 17.00)
Kopano_core updated to 8.7.80.468.33841d2aa-0+62.2
Z-Push updated to 2.5.0.alpha0+171.6a717b10-0
PHP version 7.3 fpm used with Apache2.4.37

After synchronizing contacts nothing crashed, but php log shows:

[18-Jan-2019 17:33:44] WARNING: [pool www] child 18264 exited with code 1 after 11.941201 seconds from start
[18-Jan-2019 17:33:44] NOTICE: [pool www] child 18665 started
[18-Jan-2019 17:33:53] WARNING: [pool www] child 18665 exited with code 1 after 8.986156 seconds from start
[18-Jan-2019 17:33:53] NOTICE: [pool www] child 18683 started

After sending a mail, the same happened.
After just waiting a few minutes (~5 mins), in the meanwhile 4 ios devices and 1 Windows10 client connected and then this shows up in the php log:

[18-Jan-2019 17:35:39] WARNING: [pool www] child 18686 exited with code 1 after 106.347941 seconds from start
[18-Jan-2019 17:35:39] NOTICE: [pool www] child 18996 started
[18-Jan-2019 17:35:39] WARNING: [pool www] child 18719 exited with code 1 after 58.427813 seconds from start
[18-Jan-2019 17:35:39] NOTICE: [pool www] child 18997 started
[18-Jan-2019 17:39:17] WARNING: [pool www] child 18996 exited on signal 11 (SIGSEGV) after 218.135177 seconds from start
[18-Jan-2019 17:39:17] NOTICE: [pool www] child 19327 started

Kernel log:

[723133.338392] php-fpm7.3[18996]: segfault at 7f7cdf600208 ip 000055e9a8fc272a sp 00007fffee5f0060 error 4 in php-fpm7.3[55e9a8e1c000+269000]
[723133.338571] Code: 48 8b 05 xx 7b 22 00 8b 10 85 d2 75 5b 48 89 fa 81 xx ff ff 1f 00 74 58 48 89 fe 48 c1 ea 0c 48 83 xx 08 48 81 e6 00 00 e0 ff <8b> 8c xx 00 02 00 00 48 3b 06 0f 85 83 10 e7 ff 85 xx 79 4a 83 e1

Apache proxy timout / max_execution_time set to 4200, so thats not a problem, as with 7.2 its running weeks without any single error in logs.

So for now again changed back to php 7.2 fpm with self compiled mapi.so, everything else stays the same -> nothing in error logs.

And you asked about kopano log, there is nothing shown, but I did not turn on debug level.

John

Manfred

HI John,

can you post your apache, php, php-fpm configs so that I’m able to setup a system as similar as possible to yours?

Manfred

john3377

Hmm, that will be some lines, ok you have been warned :P

/etc/php/7.3/fpm/php.ini:

[PHP]
engine = On
short_open_tag = Off
precision = 14
output_buffering = 4096
zlib.output_compression = Off
implicit_flush = Off
unserialize_callback_func =
serialize_precision = -1
disable_functions = pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_get_handler,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority,pcntl_async_signals,
disable_classes =
zend.enable_gc = On
expose_php = Off
max_execution_time = 4200
max_input_time = 60
memory_limit = 128M
error_reporting = E_ALL & ~E_DEPRECATED & ~E_STRICT
display_errors = Off
display_startup_errors = Off
log_errors = On
log_errors_max_len = 1024
ignore_repeated_errors = Off
ignore_repeated_source = Off
report_memleaks = On
html_errors = On
variables_order = "GPCS"
request_order = "GP"
register_argc_argv = Off
auto_globals_jit = On
post_max_size = 8M
auto_prepend_file =
auto_append_file =
default_mimetype = "text/html"
default_charset = "UTF-8"
include_path = ".:/usr/share/php"
doc_root =
user_dir =
enable_dl = Off
file_uploads = On
upload_max_filesize = 100M
max_file_uploads = 20
allow_url_fopen = On
allow_url_include = Off
default_socket_timeout = 60
[CLI Server]
cli_server.color = On
[Date]
date.timezone = Europe/Berlin
[filter]
[iconv]
[intl]
[sqlite3]
[Pcre]
[Pdo]
[Pdo_mysql]
pdo_mysql.default_socket=
[Phar]
[mail function]
SMTP = localhost
smtp_port = 25
mail.add_x_header = Off
[ODBC]
odbc.allow_persistent = On
odbc.check_persistent = On
odbc.max_persistent = -1
odbc.max_links = -1
odbc.defaultlrl = 4096
odbc.defaultbinmode = 1
[Interbase]
ibase.allow_persistent = 1
ibase.max_persistent = -1
ibase.max_links = -1
ibase.timestampformat = "%Y-%m-%d %H:%M:%S"
ibase.dateformat = "%Y-%m-%d"
ibase.timeformat = "%H:%M:%S"
[MySQLi]
mysqli.max_persistent = -1
mysqli.allow_persistent = On
mysqli.max_links = -1
mysqli.default_port = 3306
mysqli.default_socket =
mysqli.default_host =
mysqli.default_user =
mysqli.default_pw =
mysqli.reconnect = Off
[mysqlnd]
mysqlnd.collect_statistics = On
mysqlnd.collect_memory_statistics = Off
[OCI8]
[PostgreSQL]
pgsql.allow_persistent = On
pgsql.auto_reset_persistent = Off
pgsql.max_persistent = -1
pgsql.max_links = -1
pgsql.ignore_notice = 0
pgsql.log_notice = 0
[bcmath]
bcmath.scale = 0
[browscap]
[Session]
session.save_handler = files
session.use_strict_mode = 0
session.use_cookies = 1
session.use_only_cookies = 1
session.name = PHPSESSID
session.auto_start = 0
session.cookie_lifetime = 0
session.cookie_path = /
session.cookie_domain =
session.cookie_httponly =
session.cookie_samesite =
session.serialize_handler = php
session.gc_probability = 0
session.gc_divisor = 1000
session.gc_maxlifetime = 1440
session.referer_check =
session.cache_limiter = nocache
session.cache_expire = 180
session.use_trans_sid = 0
session.sid_length = 26
session.trans_sid_tags = "a=href,area=href,frame=src,form="
session.sid_bits_per_character = 5
[Assertion]
zend.assertions = -1
[COM]
[mbstring]
[gd]
[exif]
[Tidy]
tidy.clean_output = Off
[soap]
soap.wsdl_cache_enabled=1
soap.wsdl_cache_dir="/tmp"
soap.wsdl_cache_ttl=86400
soap.wsdl_cache_limit = 5
[sysvshm]
[ldap]
ldap.max_links = -1
[dba]
[opcache]
[curl]
[openssl]

/etc/php/7.3/fpm/php-fpm.conf:

[global]
pid = /run/php/php7.3-fpm.pid
error_log = /var/log/php7.3-fpm.log
include=/etc/php/7.3/fpm/pool.d/*.conf

/etc/php/7.3/fpm/pool.d/www.conf

[www]
user = www-data
group = www-data
listen = /run/php/php7.3-fpm.sock
listen.owner = www-data
listen.group = www-data
pm = dynamic
pm.max_children = 50
pm.start_servers = 2
pm.min_spare_servers = 2
pm.max_spare_servers = 4
pm.process_idle_timeout = 60s;
pm.max_requests = 2000

/etc/apache2/conf-enabled/php7.3-fpm.conf:

# Redirect to local php-fpm if mod_php is not available
<IfModule !mod_php7.c>
<IfModule proxy_fcgi_module>
    # Enable http authorization headers
    <IfModule setenvif_module>
    SetEnvIfNoCase ^Authorization$ "(.+)" HTTP_AUTHORIZATION=$1
    </IfModule>

    <Proxy "unix:/run/php/php7.3-fpm.sock|fcgi://localhost">
        ProxySet timeout=4200
        ProxySet connectiontimeout=600
    </Proxy>
    <FilesMatch ".+\.ph(ar|p|tml)$">
        SetHandler "proxy:fcgi://localhost"
    </FilesMatch>
    <FilesMatch ".+\.phps$">
        # Deny access to raw php sources by default
        # To re-enable it's recommended to enable access to the files
        # only in specific virtual host or directory
        Require all denied
    </FilesMatch>
    # Deny access to files without filename (e.g. '.php')
    <FilesMatch "^\.ph(ar|p|ps|tml)$">
        Require all denied
    </FilesMatch>
</IfModule>
</IfModule>

In sites-enabled I activated z-push through:

                <Directory /usr/share/z-push>
                        # Don't list a directory index, follow symlinks (maybe state dir is somewhere linked)
                        DirectoryIndex index.php
                        Options -Indexes +FollowSymLinks
                        AllowOverride none
                        Require all granted

                        <Files "config.php">
                                Require all denied
                        </Files>
                </Directory>
                Alias /Microsoft-Server-ActiveSync /usr/share/z-push/index.php
                AliasMatch (?i)/Autodiscover/Autodiscover.xml "/usr/share/z-push/autodiscover/autodiscover.php"

Modules loaded through /etc/apache2/mods-enabled:

access_compat.load -> ../mods-available/access_compat.load
actions.load -> ../mods-available/actions.load
alias.load -> ../mods-available/alias.load
auth_basic.load -> ../mods-available/auth_basic.load
authn_core.load -> ../mods-available/authn_core.load
authn_dbd.load -> ../mods-available/authn_dbd.load
authn_file.load -> ../mods-available/authn_file.load
authz_core.load -> ../mods-available/authz_core.load
authz_groupfile.load -> ../mods-available/authz_groupfile.load
authz_host.load -> ../mods-available/authz_host.load
authz_user.load -> ../mods-available/authz_user.load
autoindex.load -> ../mods-available/autoindex.load
cgi.load -> ../mods-available/cgi.load
dbd.load -> ../mods-available/dbd.load
deflate.load -> ../mods-available/deflate.load
dir.load -> ../mods-available/dir.load
env.load -> ../mods-available/env.load
expires.load -> ../mods-available/expires.load
filter.load -> ../mods-available/filter.load
headers.load -> ../mods-available/headers.load
http2.load -> ../mods-available/http2.load
include.load -> ../mods-available/include.load
info.load -> ../mods-available/info.load
mime.load -> ../mods-available/mime.load
mime_magic.load -> ../mods-available/mime_magic.load
mpm_event.load -> ../mods-available/mpm_event.load
negotiation.load -> ../mods-available/negotiation.load
proxy_fcgi.load -> ../mods-available/proxy_fcgi.load
proxy_http.load -> ../mods-available/proxy_http.load
proxy.load -> ../mods-available/proxy.load
reqtimeout.load -> ../mods-available/reqtimeout.load
rewrite.load -> ../mods-available/rewrite.load
setenvif.load -> ../mods-available/setenvif.load
socache_shmcb.load -> ../mods-available/socache_shmcb.load
ssl.load -> ../mods-available/ssl.load
status.load -> ../mods-available/status.load
userdir.load -> ../mods-available/userdir.load

Did I miss something?

John

Manfred

Hi John,

sorry for not responding earlier. I’ve tested again today taking into account your setting and wasn’t able to reproduce it. There weren’t any apache segfaults.

Manfred

john3377

Hi Manfred,

no problem for the late answer. In the meantime I again tried updated community versions, but still no luck, only recompiling with PHP 7.2 environment is working.
Very strange you are not able to reproduce. Would it be an option if I set-up a VM and send to you?
Btw., with how many mails/accounts did you test?
Thanks for still trying to help :)

BR,
John

Manfred

Hi John,

I’m not an apache expert, so I suggest you to contact the Kopano support regarding this issue.

I’ve tested with a couple of users and few items. It’s not my regular dev system, so it didn’t have a lot of data or high traffic.

Manfred

john3377

Hi!

Today I tested with Z-Push 2.6.0.alpha0+0.29d782bb-0 and with Kopano 8.7.80.856.4dd29f2fc-0+157.1, so far no more issues with PHP 7.3.

Looks like crash got fixed either by zpush or kopano, who knows. Maybe we can close this issue then.
Thanks all.

thctlo

The problem here was, mixed packages for Debian-kopano and Kopano-kopano…
i’ve seen this about 2 weeks ago after a change i made also.
The solution was simple, remove kopano and all its packages and install new, what you basicly also did.
The latest kopano package now have replaces all the Debian packages, which fixed you problem.

I do advice you to checkup all you packages so no Debian-kopano packages are in.
use the kopano packages or the Debian packages avoid mixing them.