#41888 [NEW]: Segfault when attempting to update PDO LOB column in a stream wrapper
From: hans at velum dot net
Operating system: Gentoo Linux
PHP version: 5.2.3
PHP Bug Type: PDO related
Bug description: Segfault when attempting to update PDO LOB column in a stream wrapper
Description:
------------
I am trying to use PDO LOB columns with PostgreSQL within a user-defined
stream wrapper class. PDO is correctly handling the LOB with PostgreSQL as
stream resources; however, when I attempt to update a LOB column using
another stream (e.g. php://temp, php://memory) in my stream_flush()
command, I get a segmentation fault.
Reproduce code:
---------------
I was able to create a basic reproduce case; however, it is more than 20
lines of code.
Here is a link to a snippet that creates the stream wrapper and attempts
to perform an update:
http://pastebin.com/941246
This consistently segfaults in my environment.
Expected result:
----------------
No segfault.
Actual result:
--------------
Segfault. I have PHP compiled w/ debug flags; however, the backtrace in
this case is very unhelpful.
Program terminated with signal 11, Segmentation fault.
#0 0x0830aabd in _zval_dtor_func ()
(gdb) bt
#0 0x0830aabd in _zval_dtor_func ()
#1 0x082fdf90 in ?? ()
#2 0x0870bf34 in ?? ()
#3 0x085bdec4 in ?? ()
#4 0x00000023 in ?? ()
#5 0x085c0268 in ?? ()
#6 0x00000001 in ?? ()
#7 0x00000001 in ?? ()
#8 0xbf8f0108 in ?? ()
#9 0x082fe146 in _zval_ptr_dtor ()
Backtrace stopped: frame did not save the PC
(gdb)
--
Edit bug report at http://bugs.php.net/?id=41888&edit=1
--
Try a CVS snapshot (PHP 4.4): http://bugs.php.net/fix.php?id=41888&r=trysnapshot44
Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=41888&r=trysnapshot52
Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=41888&r=trysnapshot60
Fixed in CVS: http://bugs.php.net/fix.php?id=41888&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=41888&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=41888&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=41888&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=41888&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=41888&r=support
Expected behavior: http://bugs.php.net/fix.php?id=41888&r=notwrong
Not enough info: http://bugs.php.net/fix.php?id=41888&r=notenoughinfo
Submitted twice: http://bugs.php.net/fix.php?id=41888&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=41888&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=41888&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=41888&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=41888&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=41888&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=41888&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=41888&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=41888&r=mysqlcfg
Thread (10 messages)
- hans at velum dot net