[Bug 1407990] [NEW] libapache2-mod-php5 random segmentation faults in zend_stack_push() and zend_hash_find()
Leszek
leszek.eljasz at gmail.com
Tue Jan 6 14:41:11 UTC 2015
Public bug reported:
Hello,
I observe random segfaults in PHP running as Apache module. I see
Segfaults in Apache error log, I have collected multiple core dumps
which indicate that the crashes happen in zend_stack_push() or
zend_hash_find(). It seems that the crash happens at scripts compile
time since in all the cases, I see the compile_file() function at some
level of the backtrace.
It is a low traffic website, 30-40 page hits /minute, VM hosted by Digital Ocean. Initially the problem was on Ubuntu 14.04 then in order to exclude hardware errors I spawned another VM that is hosted also in DO but in another region and currently I'm running it on Ubuntu 14.10, segfaults still happen:
# lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 14.10
Release: 14.10
Codename: utopic
Modules loaded by Apache:
# apachectl -M
Loaded Modules:
core_module (static)
so_module (static)
watchdog_module (static)
http_module (static)
log_config_module (static)
logio_module (static)
version_module (static)
unixd_module (static)
access_compat_module (shared)
alias_module (shared)
auth_basic_module (shared)
authn_core_module (shared)
authn_file_module (shared)
authz_core_module (shared)
authz_host_module (shared)
authz_user_module (shared)
deflate_module (shared)
dir_module (shared)
env_module (shared)
expires_module (shared)
filter_module (shared)
headers_module (shared)
mime_module (shared)
mpm_prefork_module (shared)
negotiation_module (shared)
php5_module (shared)
rewrite_module (shared)
setenvif_module (shared)
status_module (shared)
Modules loaded by PHP:
# ls -1 /etc/php5/apache2/conf.d/
10-pdo.ini
20-curl.ini
20-gd.ini
20-json.ini
20-mysqli.ini
20-mysql.ini
20-newrelic.ini
20-pdo_mysql.ini
20-readline.ini
Software versions:
libapache2-mod-php5 5.5.12+dfsg-2ubuntu4.1
newrelic-php5 4.17.0.79
newrelic-php5-common 4.17.0.79
php5-cli 5.5.12+dfsg-2ubuntu4.1
php5-common 5.5.12+dfsg-2ubuntu4.1
php5-curl 5.5.12+dfsg-2ubuntu4.1
php5-dbg 5.5.12+dfsg-2ubuntu4.1
php5-dev 5.5.12+dfsg-2ubuntu4.1
php5-gd 5.5.12+dfsg-2ubuntu4.1
php5-json 1.3.6-1
php5-mysql 5.5.12+dfsg-2ubuntu4.1
php5-readline 5.5.12+dfsg-2ubuntu4.1
Attachments:
- php.ini
- phpinfo.html - saved phpinfo()
- index.php: the php script that is being compiled when the segfaults happen seems to be always the same and it is main wordpress index.php file
- bt-zen_stack_push.txt - backtrace of segfault from zend_stack_push()
- bt-zen_hash_find.txt - backtrace of seggault from zend_hash_find()
Let me know if I can provide any more useful info, please.
Cheers,
Leszek
** Affects: php5 (Ubuntu)
Importance: Undecided
Status: New
** Tags: fault php segmentation
** Attachment added: "info.zip"
https://bugs.launchpad.net/bugs/1407990/+attachment/4292937/+files/info.zip
** Description changed:
Hello,
I observe random segfaults in PHP running as Apache module. I see
Segfaults in Apache error log, I have collected multiple core dumps
which indicate that the crashes happen in zend_stack_push() or
zend_hash_find(). It seems that the crash happens at scripts compile
time since in all the cases, I see the compile_file() function at some
level of the backtrace.
It is a low traffic website, 30-40 page hits /minute, VM hosted by Digital Ocean. Initially the problem was on Ubuntu 14.04 then in order to exclude hardware errors I spawned another VM that is hosted also in DO but in another region and currently I'm running it on Ubuntu 14.10, segfaults still happen:
# lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 14.10
Release: 14.10
Codename: utopic
-
Modules loaded by Apache:
# apachectl -M
Loaded Modules:
- core_module (static)
- so_module (static)
- watchdog_module (static)
- http_module (static)
- log_config_module (static)
- logio_module (static)
- version_module (static)
- unixd_module (static)
- access_compat_module (shared)
- alias_module (shared)
- auth_basic_module (shared)
- authn_core_module (shared)
- authn_file_module (shared)
- authz_core_module (shared)
- authz_host_module (shared)
- authz_user_module (shared)
- deflate_module (shared)
- dir_module (shared)
- env_module (shared)
- expires_module (shared)
- filter_module (shared)
- headers_module (shared)
- mime_module (shared)
- mpm_prefork_module (shared)
- negotiation_module (shared)
- php5_module (shared)
- rewrite_module (shared)
- setenvif_module (shared)
- status_module (shared)
-
+ core_module (static)
+ so_module (static)
+ watchdog_module (static)
+ http_module (static)
+ log_config_module (static)
+ logio_module (static)
+ version_module (static)
+ unixd_module (static)
+ access_compat_module (shared)
+ alias_module (shared)
+ auth_basic_module (shared)
+ authn_core_module (shared)
+ authn_file_module (shared)
+ authz_core_module (shared)
+ authz_host_module (shared)
+ authz_user_module (shared)
+ deflate_module (shared)
+ dir_module (shared)
+ env_module (shared)
+ expires_module (shared)
+ filter_module (shared)
+ headers_module (shared)
+ mime_module (shared)
+ mpm_prefork_module (shared)
+ negotiation_module (shared)
+ php5_module (shared)
+ rewrite_module (shared)
+ setenvif_module (shared)
+ status_module (shared)
Modules loaded by PHP:
# ls -1 /etc/php5/apache2/conf.d/
10-pdo.ini
20-curl.ini
20-gd.ini
20-json.ini
20-mysqli.ini
20-mysql.ini
20-newrelic.ini
20-pdo_mysql.ini
20-readline.ini
-
Software versions:
libapache2-mod-php5 5.5.12+dfsg-2ubuntu4.1
newrelic-php5 4.17.0.79
newrelic-php5-common 4.17.0.79
php5-cli 5.5.12+dfsg-2ubuntu4.1
php5-common 5.5.12+dfsg-2ubuntu4.1
php5-curl 5.5.12+dfsg-2ubuntu4.1
php5-dbg 5.5.12+dfsg-2ubuntu4.1
php5-dev 5.5.12+dfsg-2ubuntu4.1
php5-gd 5.5.12+dfsg-2ubuntu4.1
php5-json 1.3.6-1
php5-mysql 5.5.12+dfsg-2ubuntu4.1
php5-readline 5.5.12+dfsg-2ubuntu4.1
-
Attachments:
- php.ini
- phpinfo.html - saved phpinfo()
- index.php: the php script that is being compiled when the segfaults happen seems to be always the same and it is main wordpress index.php file
- bt-zen_stack_push.txt - backtrace of segfault from zend_stack_push()
- bt-zen_hash_find.txt - backtrace of seggault from zend_hash_find()
-
- Let me know if I can provide any more usefull info, please.
+ Let me know if I can provide any more useful info, please.
Cheers,
Leszek
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https://bugs.launchpad.net/bugs/1407990
Title:
libapache2-mod-php5 random segmentation faults in zend_stack_push()
and zend_hash_find()
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