Bug #12091 Updated: zlib uncompress buffer error/ inflate failed
| From: | sniper@php.net | Date: | Sun, 04 Nov 2001 03:42:33 +0000 |
| Subject: | Bug #12091 Updated: zlib uncompress buffer error/ inflate failed | ||
| References: | 1 | Groups: | php.dev |
| Request: | Send a blank email to php-dev+get-69599@lists.php.net to get a copy of this message | ||
ID: 12091
Updated by: sniper
Reported By: alberty@neptunlabs.de
Old Status:
Status: Open
Bug Type: Zlib Related
Operating System: i686-pc-linux-gnu
PHP Version: 4.0CVS-2001-07-12
New Comment:
missing status
Previous Comments:
------------------------------------------------------------------------
[2001-07-13 13:33:49] alberty@neptunlabs.de
Hi Thies,
thank you for your changes in zlib.c but you have not
really fix the problem.
If i increase the string repeating from 5000 to 35000,
i have the same problem again, but
i don't no why, sometimes php works correct...
<---snip--->
<tt>
<?php
error_reporting(63);
mt_srand ((double) microtime() * 1000000);
for ($original="",$i=0;$i<35000;$i++){
//$out.=chr(mt_rand()); //
$original.="lala "; // problem
}
$packed=gzdeflate($original); // gzcompress
$unpacked=gzinflate($packed); // gzuncompress
echo "Length original:".strlen($original)."<br>";
echo "Length packed:".strlen($packed)."<br>";
echo "Length unpacked:".strlen($unpacked)."<br>";
if (strcmp($original,$unpacked)==0) echo "Strings are equal";
else echo "<b>Strings <u>not</u> equal</b>";
?>
</tt>
<---snap--->
Regards,
--
Steve
------------------------------------------------------------------------
[2001-07-13 11:15:07] thies@php.net
fixed in CVS
you can make it work in 4.0.6 by changing maxfactor from 8
to lets say 16 in zlib.c around line 912
------------------------------------------------------------------------
[2001-07-12 05:38:24] alberty@neptunlabs.de
Hi,
the follow code produces a deflated string
which php can not inflate.
php results:
"Warning: gzinflate: buffer error in /web/htdocs/thisfile.php"
----
<tt>
<?php
error_reporting(63);
mt_srand ((double) microtime() * 1000000);
for ($original="",$i=0;$i<5000;$i++){
//$original.=chr(mt_rand()); //
$original.="lala "; // problem
}
$packed=gzdeflate($original); // gzcompress
$unpacked=gzinflate($packed); // gzuncompress
echo "Length original:".strlen($original)."<br>";
echo "Length packed:".strlen($packed)."<br>";
echo "Length unpacked:".strlen($unpacked)."<br>";
if (strcmp($original,$unpacked)==0) echo "Strings are equal";
else echo "<b>Strings <u>not</u> equal</b>";
?>
</tt>
----
Regards,
--
Steve
------------------------------------------------------------------------
Edit this bug report at http://bugs.php.net/?id=12091&edit=1