From: ch at westend dot com
Operating system: Debian 4.0 'etch' Linux
PHP version: 5.2.5
PHP Bug Type: Reproducible crash
Bug description: Segfault on graceful restart?
Description:
------------
I have lots of segfaults in the error.log of a new apache installation
using a Debian shipped Apache2 with prefork mpm and the very latest PHP5.
Below is the backtrace.
Reproduce code:
---------------
I guess it comes sometimes from graceful restarts or from idle threads
that apache kills himself.
PHP was compiled using:
./configure \
--with-apxs2=/usr/bin/apxs2 \
--prefix=/usr/local/php5 \
\
--enable-shared \
--enable-exif \
--enable-ftp \
--enable-gd-native-ttf \
--enable-mbstring \
--enable-simplexml \
--enable-soap \
--enable-pdo \
--enable-spl \
--enable-zip \
--with-bz2 \
--with-curl \
--with-curl=/usr \
--with-freetype-dir=/usr \
--with-gd=shared \
--with-gettext \
--with-iconv \
--with-mime-magic \
--with-mysql=shared,/usr \
--with-mysql-sock=/var/run/mysqld/mysqld.sock \
--with-pdo-mysql=/usr \
--with-t1lib \
--with-jpeg-dir=/usr \
--with-ttf=/usr \
--with-zlib=/usr \
--with-xsl=/usr \
Expected result:
----------------
-
Actual result:
--------------
$ gdb /usr/sbin/apache2 core
...
Core was generated by `/usr/sbin/apache2 -k start'.
Program terminated with signal 11, Segmentation fault.
#0 _zend_mm_free_int (heap=0x744dd0, p=0x2ab8a7c272a0) at
/usr/local/src/php5/php-5.2.5/Zend/zend_alloc.c:1944
1944 if (ZEND_MM_IS_FREE_BLOCK(next_block)) {
(gdb) bt
#0 _zend_mm_free_int (heap=0x744dd0, p=0x2ab8a7c272a0) at
/usr/local/src/php5/php-5.2.5/Zend/zend_alloc.c:1944
#1 0x00002ab89d7e3735 in destroy_op_array (op_array=0x2ab8abe89260) at
/usr/local/src/php5/php-5.2.5/Zend/zend_opcode.c:232
#2 0x00002ab89d7f6cb8 in zend_hash_destroy (ht=0x2ab8abe84760) at
/usr/local/src/php5/php-5.2.5/Zend/zend_hash.c:526
#3 0x00002ab89d7e3465 in destroy_zend_class (pce=<value optimized out>)
at /usr/local/src/php5/php-5.2.5/Zend/zend_opcode.c:184
#4 0x00002ab89d7f69a2 in zend_hash_apply_deleter (ht=0x745710,
p=0x9dbba0) at /usr/local/src/php5/php-5.2.5/Zend/zend_hash.c:611
#5 0x00002ab89d7f6aa9 in zend_hash_reverse_apply (ht=0x745710,
apply_func=0x2ab89d7dee70 <clean_non_persistent_class>)
at /usr/local/src/php5/php-5.2.5/Zend/zend_hash.c:760
#6 0x00002ab89d7dfe96 in shutdown_executor () at
/usr/local/src/php5/php-5.2.5/Zend/zend_execute_API.c:291
#7 0x00002ab89d7ec232 in zend_deactivate () at
/usr/local/src/php5/php-5.2.5/Zend/zend.c:860
#8 0x00002ab89d7aa9be in php_request_shutdown (dummy=<value optimized
out>) at /usr/local/src/php5/php-5.2.5/main/main.c:1485
#9 0x00002ab89d86b08e in php_handler (r=0x968488) at
/usr/local/src/php5/php-5.2.5/sapi/apache2handler/sapi_apache2.c:471
#10 0x0000000000432c89 in ap_run_handler ()
#11 0x0000000000435e02 in ap_invoke_handler ()
#12 0x0000000000441ed8 in ap_process_request ()
#13 0x000000000043f3bc in ap_register_input_filter ()
#14 0x00000000004397e1 in ap_run_process_connection ()
#15 0x0000000000445851 in ap_graceful_stop_signalled ()
#16 0x0000000000445ac4 in ap_graceful_stop_signalled ()
#17 0x0000000000446366 in ap_mpm_run ()
#18 0x0000000000420e00 in main ()
--
Edit bug report at http://bugs.php.net/?id=43459&edit=1
--
Try a CVS snapshot (PHP 4.4):
http://bugs.php.net/fix.php?id=43459&r=trysnapshot44
Try a CVS snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=43459&r=trysnapshot52
Try a CVS snapshot (PHP 5.3):
http://bugs.php.net/fix.php?id=43459&r=trysnapshot53
Try a CVS snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=43459&r=trysnapshot60
Fixed in CVS: http://bugs.php.net/fix.php?id=43459&r=fixedcvs
Fixed in release:
http://bugs.php.net/fix.php?id=43459&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=43459&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=43459&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=43459&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=43459&r=support
Expected behavior: http://bugs.php.net/fix.php?id=43459&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=43459&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=43459&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=43459&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=43459&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=43459&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=43459&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=43459&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=43459&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=43459&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=43459&r=mysqlcfg
