From: r dot korving at xit dot nl
Operating system: debian linux 2.4.26 kernel
PHP version: 5.0.0
PHP Bug Type: SimpleXML related
Bug description: xpath() output makes PHP segfault or run out of memory when used in
preg_match
Description:
------------
When I use the output of $xmlobject->xpath() in a preg_match("/whatever
pattern/", $xpathoutput) it makes memory usage explode or the whole script
segfaults.
The problem can be manually solved by typecasting the $xpathoutput to a
string, but nonetheless, a segfault should never ever be desired
behaviour. In fact, in one case I actually saw PHP tried to allocate over
1 gigabyte of memory.
Reproduce code:
---------------
#!/usr/bin/php5
<?
$xml = simplexml_load_file("test.xml");
$val = $xml->xpath("/rootelem/testelems");
for ($i=0; $i < 20; $i++)
{
if (preg_match("/abc/", $val[0]))
echo "Y";
else
echo "N";
}
?>
test.xml:
<rootelem>
<testelems>this is one</testelems>
<testelems>this is another one !</testelems>
</rootelem>
Expected result:
----------------
NNNNNNNNNNNNNNNNNNNN
Actual result:
--------------
NSegmentation fault
--
Edit bug report at http://bugs.php.net/?id=29549&edit=1
--
Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=29549&r=trysnapshot4
Try a CVS snapshot (php5): http://bugs.php.net/fix.php?id=29549&r=trysnapshot5
Fixed in CVS: http://bugs.php.net/fix.php?id=29549&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=29549&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=29549&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=29549&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=29549&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=29549&r=support
Expected behavior: http://bugs.php.net/fix.php?id=29549&r=notwrong
Not enough info: http://bugs.php.net/fix.php?id=29549&r=notenoughinfo
Submitted twice: http://bugs.php.net/fix.php?id=29549&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=29549&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=29549&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=29549&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=29549&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=29549&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=29549&r=float
