From: julien at palard dot fr
Operating system: GNU/Linux
PHP version: 5.4.15
Package: Performance problem
Bug Type: Bug
Bug description:Huge memory usage on unknown Content-Type
Description:
------------
When a POST have an unknwon Content-Type, the php_default_post_reader store
the body of the request three times :
* In SG(request_info).post_data
* In SET_VAR_STRINGL("HTTP_RAW_POST_DATA", ...
* In SG(request_info).raw_post_data
So, getting a 500Mb request body result in a 1.5Gb memory usage, easily
triggering a "memory limit exhausted" error.
Known content types are found in main/php_content_types.c and are
"application/x-www-form-urlencoded" and "multipart/form-data", so this case
is easily triggered.
This fact seems well known as we can read in main/php_content_types.c:59 :
/* for php://input stream:
some post handlers modify the content of request_info.post_data
so for now we need a copy for the php://input stream
in the long run post handlers should be changed to not touch
request_info.post_data for memory preservation reasons
*/
Solving this comment only fix 1/2 of the bug, keeping the body stored in
two different locations, but it's a first step.
I only open this ticket to track the history of this issue, I do not really
need it to be fixed.
--
Edit bug report at https://bugs.php.net/bug.php?id=64935&edit=1
--
Try a snapshot (PHP 5.4):
https://bugs.php.net/fix.php?id=64935&r=trysnapshot54
Try a snapshot (PHP 5.3):
https://bugs.php.net/fix.php?id=64935&r=trysnapshot53
Try a snapshot (trunk):
https://bugs.php.net/fix.php?id=64935&r=trysnapshottrunk
Fixed in SVN: https://bugs.php.net/fix.php?id=64935&r=fixed
Fixed in release: https://bugs.php.net/fix.php?id=64935&r=alreadyfixed
Need backtrace: https://bugs.php.net/fix.php?id=64935&r=needtrace
Need Reproduce Script: https://bugs.php.net/fix.php?id=64935&r=needscript
Try newer version: https://bugs.php.net/fix.php?id=64935&r=oldversion
Not developer issue: https://bugs.php.net/fix.php?id=64935&r=support
Expected behavior: https://bugs.php.net/fix.php?id=64935&r=notwrong
Not enough info:
https://bugs.php.net/fix.php?id=64935&r=notenoughinfo
Submitted twice:
https://bugs.php.net/fix.php?id=64935&r=submittedtwice
register_globals: https://bugs.php.net/fix.php?id=64935&r=globals
PHP 4 support discontinued: https://bugs.php.net/fix.php?id=64935&r=php4
Daylight Savings: https://bugs.php.net/fix.php?id=64935&r=dst
IIS Stability: https://bugs.php.net/fix.php?id=64935&r=isapi
Install GNU Sed: https://bugs.php.net/fix.php?id=64935&r=gnused
Floating point limitations: https://bugs.php.net/fix.php?id=64935&r=float
No Zend Extensions: https://bugs.php.net/fix.php?id=64935&r=nozend
MySQL Configuration Error: https://bugs.php.net/fix.php?id=64935&r=mysqlcfg
