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Bug #34456 [PATCH] pspell extension segfaults with aspell 0.50.x
Submitted: 2005-09-10 14:49 UTC Modified: 2005-09-12 18:35 UTC
From: nlopess@php.net Assigned:
Status: Closed Package: Pspell related
PHP Version: 5CVS-2005-09-10 (CVS) OS: *
Private report: No CVE-ID: None
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 [2005-09-10 14:49 UTC] nlopess@php.net 
Description:
------------
The pspell extension segfaults with (at least) aspell 0.50.x. Although aspell 0.60.x doesn't, there is a problem in PHP code.

Patch: http://mega.ist.utl.pt/~ncpl/php_pspell_patch.txt

Reproduce code:
---------------
all pspell_config_xx() segfault.
<?
$p=pspell_new('en');
pspell_config_mode($p, PSPELL_FAST);
?>

Patches

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 [2005-09-11 19:07 UTC] iliaa@php.net 
I've used pspell extensively with 0.5 lib and never seen a crash pertaining to the demonstrate code.
 [2005-09-11 20:25 UTC] nlopess@php.net 
I've tested with aspell 0.50.5 and it produces the following (without my patch):
http://mega.ist.utl.pt/~ncpl/php_aspell_valgrind.txt
http://mega.ist.utl.pt/~ncpl/php_aspell_gdb.txt

My patch fixes these problems. And it makes sense. PHP is passing a Speller* pointer, where it should be passing a Config* to pspell_manager_config().
I've "wasted" a couple of hours tracking down this bug in the aspell sources, and I think that this bug might not happen in all setups, depending on the compiler (because of some magic C++ upcasting).
 [2005-09-12 08:44 UTC] sniper@php.net 
It crashes for me too. I also have (a|p)spell 0.50.5
 [2005-09-12 18:35 UTC] iliaa@php.net 
This bug has been fixed in CVS.

Snapshots of the sources are packaged every three hours; this change
will be in the next snapshot. You can grab the snapshot at
http://snaps.php.net/.
 
Thank you for the report, and for helping us make PHP better.
 
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