#49098 [Opn]: Using custom session handler causes segfault in session_save_state

ID: 49098 Updated by: timj@php.net Reported By: bugs at timj dot co dot uk Status: Open Bug Type: Session related Operating System: Linux PHP Version: 5.2.10 New Comment: After spending an enormous amount of time testing endless combinations of compile and runtime options, I have hopefully found the key to solving this obscure bug. The segfault only happens specifically if the following is true: - the mbstring extension is enabled, *AND* - the mssql extension is enabled (particularly weird because the test script does not use mssql in any way) In the hope of making the reproduction scenario more robust, I have pared down the configure line to a minimum and here is the exact environment, from source tarball, which I can reproduce it in: OS: Fedora 11 x86_64 (fully updated as at 2009-11-08) Notable dependencies: mysql-devel-5.1.37-1.fc11.x86_64 freetds-devel-0.82-5.fc11.x86_64 gcc version 4.4.1 20090725 (Red Hat 4.4.1-2) (GCC) Download snapshot 200911070930 from snaps.php.net tar -jxf php5.2-200911070930.tar.bz2 cd php5.2-200911070930 ./configure --includedir=/usr/include --libdir=/usr/lib64 --with-libdir=lib64 --without-pear --with-mysqli=shared,/usr/bin/mysql_config --enable-mbstring=shared --enable-mbregex --with-mssql=shared,/usr make -j3 make install # as root create /usr/local/etc/php.ini containing only the following: extension=mbstring.so extension=mssql.so extension=mysqli.so include_path=/path/to/pear/php $ /usr/local/bin/php -c /usr/local/etc/php.ini php-bug49098.php # script posted on 11 Aug Segmentation fault Commenting out EITHER "extension=mbstring.so" or "extension=mssql.so" in /usr/local/etc/php.ini stops the segfault. Can anyone else now reproduce this with the above environment? Is there any other information about the environment that I need to provide? Previous Comments: ------------------------------------------------------------------------ [2009-09-26 10:54:13] timj@php.net 1. Still segfaults for me with the release version of 5.2.11, with MySQLi connection (mysql client libs and server 5.1.37). -> Sriram, I also tried with your test script (just to make sure there wasn't a subtle difference from mine) and it also segfaulted. -> Segfault is still in the same place as originally. 2. snap-200909261030 doesn't build atm (error in mysqli_api) What more info can I give to assist? ------------------------------------------------------------------------ [2009-09-24 19:32:19] srinatar@php.net unable to reproduce with the earlier provided test case. so, need more information to reproduce / investigate this bug . also, would be useful to know if this still happens with either 5.2.11 (or latest svn snapshot) ------------------------------------------------------------------------ [2009-09-24 17:48:47] srinatar@php.net i do have a wordpress running with php 5.2.11 for my site and i don't have any issues. if you do notice with the latest php build, if you can provide a test case to reproduce this bug that would be useful. as i noted earlier, i was not able to reproduce this bug with the provided test case here. ------------------------------------------------------------------------ [2009-09-18 19:43:06] ulf at ladb dot unm dot edu Hi, Is this bug still under investigation? Just wondering because 5.2.9 is the last version of PHP that works with Wordpress/MySQL without crashing Apache. Thanks. ------------------------------------------------------------------------ [2009-09-16 18:19:08] sriram dot natarajan at gmail dot com i just took the latest php snapshot from http://snaps.php.net and tried it out. if you notice, my script is just a completion of your script - i just filled in some missing pieces in your script - like creating the table etc . i am also using mysql 5.1.30 ------------------------------------------------------------------------ The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at http://bugs.php.net/49098 -- Edit this bug report at http://bugs.php.net/?id=49098&edit=1