ID: 36884
Comment by: kutovoy at gmail dot com
Reported By: guenther dot unterrainer at gknsintermetals dot com
Status: No Feedback
Bug Type: Apache related
Operating System: SLES9 SP3 x86-64
PHP Version: 4.4.2
New Comment:
I found out that this problem (in my case) was connected with unpacking
(gz) corrupted(truncated) data from database after some headeik with
debugging and testing. I stored compressed data in TEXT field, but data
was 85Kb length and was truncated to 65535. I think gzuncompress cause
that glibc errors. After altering field to LONGBLOB problem gone.
Good luck!
Previous Comments:
------------------------------------------------------------------------
[2006-10-11 14:01:11] kutovoy at gmail dot com
The same errors on big arrays of objects. on PHP 4.4.2, I'm now trying
to figure out working version of PHP.
*** glibc detected *** free(): invalid pointer: 0x08925b00 ***
[Wed Oct 11 09:26:06 2006] [notice] child pid 2610 exit signal Aborted
(6)
[Wed Oct 11 09:28:38 2006] [error] [client 194.247.xxx.yyy] File does
not exist: /xxx/htdocs/yyy/favicon.ico
[Wed Oct 11 10:58:43 2006] [notice] child pid 4059 exit signal
Segmentation fault (11)
and similar with *** glibc detected *** corrupted double-linked list:
------------------------------------------------------------------------
[2006-10-05 21:14:55] ndickerson at gmi-mr dot com
I have also encountered this bug on php 4.3.10 using php xmlrpc
libraries(phpxmlrpc.sourceforge.net) and processing an array of 20,000
records using the library, which happens to create a large number of
objects.
*** glibc detected *** double free or corruption (!prev): 0x0fbf24b8
***
is followed by some
*** glibc detected *** corrupted double-linked list: 0x006f4858 ***
There are also some other errors that I have lost that occur in the
place of the double free or corruption error..
This works fine when it is not processing as many objects.
------------------------------------------------------------------------
[2006-10-05 16:53:12] egon at inf dot ufpr dot br
The above code works fine in 5.1. It crashes on PHP 4.3.4, 4.4.2 and
4.4.4 on both linux/windows.
------------------------------------------------------------------------
[2006-10-04 22:35:04] egon at inf dot ufpr dot br
By the way, I've got several types of erros, it appears to be random:
[Wed Oct 04 17:51:18 2006] [notice] child pid 12451 exit signal
Segmentation fault (11)
*** glibc detected *** free(): invalid next size (fast): 0x08202798
***
[Wed Oct 04 17:58:35 2006] [notice] child pid 12693 exit signal Aborted
(6)
77*** glibc detected *** corrupted double-linked list: 0xb7b7d358 ***
[Wed Oct 04 19:21:51 2006] [notice] child pid 12731 exit signal Aborted
(6)
------------------------------------------------------------------------
[2006-10-04 22:31:30] egon at inf dot ufpr dot br
Man, this was very difficult to track down. I spent some hours locating
to problem and trying to isolate it. To me it has nothing to do with
databases or acceletators. Apparently it has to do with a lot of
classes in an array. I'm using
PHP 4.4.2-1build1 on Ubuntu 6.06.
You need to have some high limit on php.ini's memory_limit (to me 512M
was enough). The 'magical' number 16000 on the code above can be
lowered to 3000 to crash my 1GRam machine but I had to increase it to
16000 to crash my 2GRam server.
I have a production server down now because of this, any suggestions?
Downgrading perhaps?
We will be glad to cooperate with more info.
Thanks,
<?php
class Field {
var $name,$type,$value, $length, $allownull, $description,
$long_description, $validation, $accepted_values, $default_value;
function Field($name, $type, $length, $allownull, $description,
$default=NULL,$long_description=NULL) {
$this->name=$name;
$this->type=$type;
$this->length=$length;
$this->allownull=$allownull;
$this->description=$description;
$this->long_description=$long_description;
$this->default_value=$default;
$this->validation=NULL;
$this->accepted_values=NULL;
}
}
class DBObject {
function DBObject($conn=NULL) {
$this->setupFields();
$this->conn=$conn;
$this->orderby=array();
}
function addField($name, $type, $length, $allownull,
$description, $default=NULL,$long_description=NULL) {
$this->field[$name]["obj"]=new Field($name, $type,
$length, $allownull, $description, $default,$long_description);
}
}
class SomeTable extends DBObject {
function setupFields() {
for ($i=0;$i<26;$i++)
$this->addField("field$i", "string", 11, false,
"Some field");
}
}
function crashMe() {
$x=new SomeTable(NULL);
$arr=array();
for($i=0;$i<16000;$i++) {
$m=new SomeTable(NULL);
$arr[]=$m;
}
return $arr;
}
crashMe();
echo "I've not crashed?";
?>
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the rest of the comments, please view the bug report online at
http://bugs.php.net/36884
--
Edit this bug report at http://bugs.php.net/?id=36884&edit=1
