From: jr-phpbugs at cedric dot unob dot cz
Operating system: linux (irrelevant)
PHP version: 4.4.4
PHP Bug Type: MSSQL related
Bug description: PHP + FreeTDS 0.64 crashes when TEXT field with empty string
encountered
Description:
------------
PHP, compiled with --with-sybase-ct=/usr/localFreeTDS crashes with
segmentation fault on SELECT from column of type TEXT with empty string
value.
Observed on PHP compiled with
--with-sybase-ct=/path/to/freetds-0.64/prefix , against MSSQL server 2000
Affects FreeTDS 0.64 and 0.64.1 (with 'post64.patch.gz' applied). Has not
been observed with FreeTDS 0.63.
FreeTDS 0.64 alone (without PHP) is not affected.
Possible bug in ext/sybase_ct/php_sybase_ct.c
Reproduce code:
---------------
in MSSQL Enterprise manager:
CREATE TABLE [dbo].[TEST] (
[TEST_ID] [int] IDENTITY (1, 1) NOT NULL ,
[TEST_VALUE] [int] NOT NULL ,
[TEST_TEXT] [text] NULL
)
insert into TEST (TEST_VALUE) values ('5');
insert into TEST (TEST_VALUE,TEST_TEXT) values ('6','');
in PHP script:
...
$query="SELECT test_text FROM test WHERE test_id=2;
$res=mssql_query($query,$db);
Expected result:
----------------
Empty string.
Actual result:
--------------
PHP crashes with segmentation fault.
CLI version:
- crash with "segmentation fault" message
libphp4.so version:
- affected thread produces a line "[notice] child pid XXXXX exit signal
Segmentation fault (11)" in Apache's error log.
--
Edit bug report at http://bugs.php.net/?id=39134&edit=1
--
Try a CVS snapshot (PHP 4.4):
http://bugs.php.net/fix.php?id=39134&r=trysnapshot44
Try a CVS snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=39134&r=trysnapshot52
Try a CVS snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=39134&r=trysnapshot60
Fixed in CVS: http://bugs.php.net/fix.php?id=39134&r=fixedcvs
Fixed in release:
http://bugs.php.net/fix.php?id=39134&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=39134&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=39134&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=39134&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=39134&r=support
Expected behavior: http://bugs.php.net/fix.php?id=39134&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=39134&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=39134&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=39134&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=39134&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=39134&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=39134&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=39134&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=39134&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=39134&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=39134&r=mysqlcfg
