From: willh at metavera dot com
Operating system: Linux 2.6.18-5-686-bigmem
PHP version: 5.2CVS-2008-06-23 (snap)
PHP Bug Type: Reproducible crash
Bug description: Crash In ZEND_MM_CHECK_TREE
Description:
------------
PHP crashes in ZEND_MM_CHECK_TREE. The problem is reproducible with
our source code but I have been unable to create a short script that
duplicates the issue.
The crash happens with with the CVS version of PHP, and the same crash
happens with 5.2.6.
I have a core file if needed. If PHP is configured with --enable-debug
the crash does not happen.
On crash, we also get:
----
/usr/src/t/php-5.2.6/Zend/zend_execute.c(403) : Freeing 0xB1272E30
(16
bytes), script=[redacted]/training/code/lmember/index.php
Last leak repeated 2 times
----
in the error logs
PHP 5.2 snap configured like ...
'./configure' '--prefix=/usr/local/php5' '--with-apxs2=/usr/bin/apxs2'
'--with-libxml-dir' '--with-openssl' '--with-zlib'
'--enable-bcmath'
'--enable-calendar' '--with-curl' '--with-curlwrappers'
'--enable-
exif' '--enable-ftp' '--with-gd' '--enable-gd-native-ttf'
'--with-
gettext' '--with-gmp' '--with-imap' '--enable-mbstring'
'--with-pdo-
pgsql' '--with-pgsql' '--enable-soap' '--with-tidy'
'--enable-zip' '--
with-xsl' '--with-imap-ssl' '--with-jpeg-dir=/usr/lib' '--with-png-
dir=/usr/lib' '--with-ttf=/usr/lib' '--enable-zip' '--with-freetype-
dir=/usr/lib' '--with-bz2' '--enable-sockets' '--with-kerberos'
'--
with-mcrypt' '--enable-sysvshm' '--enable-sysvsem'
Actual result:
--------------
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -1215793472 (LWP 16822)]
0xb73c0298 in _zend_mm_free_int (heap=0x8230fe8, p=<value optimized
out>) at /usr/src/php-5.2.6/Zend/zend_alloc.c:817
817 ZEND_MM_CHECK_TREE(mm_block);
(gdb) bt
#0 0xb73c0298 in _zend_mm_free_int (heap=0x8230fe8, p=<value
optimized
out>) at /usr/src/php-5.2.6/Zend/zend_alloc.c:817
#1 0xb73f2482 in zend_objects_free_object_storage (object=0xa2edd24c)
at /usr/src/php-5.2.6/Zend/zend_objects.c:122
#2 0xb73f532f in zend_objects_store_free_object_storage
(objects=0xb76e2b28) at /usr/src/php-5.2.6/Zend/zend_objects_API.c:89
#3 0xb73cdce9 in shutdown_executor () at
/usr/src/php-5.2.6/Zend/zend_execute_API.c:299
#4 0xb73d98dd in zend_deactivate () at /usr/src/php-
5.2.6/Zend/zend.c:860
#5 0xb739a569 in php_request_shutdown (dummy=0x0) at
/usr/src/php-5.2.6/main/main.c:1486
#6 0xb745471d in php_handler (r=0x8355578) at
/usr/src/php-5.2.6/sapi/apache2handler/sapi_apache2.c:469
#7 0x08074607 in ap_run_handler ()
#8 0x080777b1 in ap_invoke_handler ()
#9 0x0808471a in ap_internal_redirect ()
...
--
Edit bug report at http://bugs.php.net/?id=45339&edit=1
--
Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=45339&r=trysnapshot52
Try a CVS snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=45339&r=trysnapshot53
Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=45339&r=trysnapshot60
Fixed in CVS: http://bugs.php.net/fix.php?id=45339&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=45339&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=45339&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=45339&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=45339&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=45339&r=support
Expected behavior: http://bugs.php.net/fix.php?id=45339&r=notwrong
Not enough info: http://bugs.php.net/fix.php?id=45339&r=notenoughinfo
Submitted twice: http://bugs.php.net/fix.php?id=45339&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=45339&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=45339&r=php4
Daylight Savings: http://bugs.php.net/fix.php?id=45339&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=45339&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=45339&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=45339&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=45339&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=45339&r=mysqlcfg