#32171 [Asn]: WebDAV stream wrapper crashes PHP

ID: 32171 User updated by: jr at terragate dot net Reported By: jr at terragate dot net Status: Assigned Bug Type: SPL related Operating System: x86 linux PHP Version: 5CVS-2005-03-05 Assigned To: helly New Comment: I tested the instanceof segfault against the 5.1 branch and it segfaults too. But I had to change a is_a in HTTP/Request.php to instanceof because the 'notice exception' was thrown there this time. I wasn't able to reproduce the segfault with a smaller test case by using HTTP/Request.php myself (PEAR's WebDAV Wrapper) nor using instanceof inside a small stream wrapper. Initially I tested the bug with 5.0.3 but tried a snap a few hours later. Sorry for not updating the version field. Previous Comments: ------------------------------------------------------------------------ [2005-03-06 16:21:35] sniper@php.net Please don't open more reports about same issue. (and when you report bugs, put the LATEST version in the 'Version' field' so we don't have to waste time asking if you tested the latest version..) ------------------------------------------------------------------------ [2005-03-04 18:48:59] jr at terragate dot net I already tested the bug against yesterdays snapshot of 5.0.x. Using the 5.1.0 snap does not resolve the exception issue. I will test the instanceof segfault on monday against the 5.1 branch. Maybe I should create a seperate bug for it. voyager:~/Downloads/php5-200503041530/result/bin jr$ uname -a Darwin voyager.starbase12.sfn 7.8.0 Darwin Kernel Version 7.8.0: Wed Dec 22 14:26:17 PST 2004; root:xnu/ xnu-517.11.1.obj~1/RELEASE_PPC Power Macintosh powerpc voyager:~/Downloads/php5-200503041530/result/bin jr$ ./ php -v PHP 5.1.0-dev (cgi) (built: Mar 4 2005 18:33:26) (DEBUG) Copyright (c) 1997-2004 The PHP Group Zend Engine v2.1.0-dev, Copyright (c) 1998-2004 Zend Technologies voyager:~/Downloads/php5-200503041530/result/bin jr$ ./ php test.php Content-type: text/html X-Powered-By: PHP/5.1.0-dev <br /> <b>Fatal error</b>: Uncaught exception 'Exception' with message 'is_a(): Deprecated. Please use the instanceof operator' in /Volumes/Data/Users/jr/Downloads/php5 -200503041530/result/bin/test.php:6 Stack trace: #0 /Volumes/Data/Users/jr/Downloads/php5-200503041530/ result/bin/test.php(12): StreamWrapper- >dir_opendir(NULL, 'AKnownOrUnknown...') #1 /Volumes/Data/Users/jr/Downloads/php5-200503041530/ result/bin/test.php(12): DirectoryIterator- >__construct('test://path/', 4) #2 {main} thrown in <b>/Volumes/Data/Users/jr/Downloads/php5 -200503041530/result/bin/test.php</b> on line <b>6</ b><br /> /Volumes/Data/Users/jr/Downloads/php5-200503041530/ result/bin/test.php(6) : Fatal error - Uncaught exception 'Exception' with message 'is_a(): Deprecated. Please use the instanceof operator' in /Volumes/Data/ Users/jr/Downloads/php5-200503041530/result/bin/ test.php:6 Stack trace: #0 /Volumes/Data/Users/jr/Downloads/php5-200503041530/ result/bin/test.php(12): StreamWrapper- >dir_opendir(NULL, 'AKnownOrUnknown...') #1 /Volumes/Data/Users/jr/Downloads/php5-200503041530/ result/bin/test.php(12): DirectoryIterator- >__construct('test://path/', 4) #2 {main} thrown ------------------------------------------------------------------------ [2005-03-04 16:34:34] sniper@php.net Please try using this CVS snapshot: http://snaps.php.net/php5-latest.tar.gz For Windows: http://snaps.php.net/win32/php5-win32-latest.zip ------------------------------------------------------------------------ [2005-03-03 17:13:03] jr at terragate dot net After digging a while in the PHP source I found the reason for the thrown exception. The SPL sets the php error handling mode to EH_THROW. But currently php_error_cb throws everything as exception, even notices (E_NOTICE), warnings (E_WARNING) and strict warnings caused by E_STRICT. IMHO those shouldn't be thrown as exception. I've made a path that fixes this. E_NOTICE, E_WARNING and E_STRICT will be handled the same way as in EH_NORMAL. Probably E_USER_NOTICE and E_USER_WARNING should be added. http://www.terragate.net/~jr/no_notices_and_warnings_as_exception.diff ------------------------------------------------------------------------ [2005-03-03 15:05:51] jr at terragate dot net I was able to create a smaller example for the exception: <?php class StreamWrapper { public function dir_opendir($path, $options) { return is_a(null, 'AKnownOrUnknownClass'); } } stream_wrapper_register('test', 'StreamWrapper'); $it = new DirectoryIterator('test://path/'); ?> This will raise the following exception: Fatal error: Uncaught exception 'Exception' with message 'is_a(): Deprecated. Please use the instanceof operator' in /var/www/localhost/htdocs/splexception.php:6 Stack trace: #0 /var/www/localhost/htdocs/splexception.php(6): is_a(NULL, 'AKnownOrUnknown...') #1 /var/www/localhost/htdocs/splexception.php(13): StreamWrapper->dir_opendir('test://path/', 4) #2 /var/www/localhost/htdocs/splexception.php(13): DirectoryIterator->__construct('test://path/') #3 {main} thrown in /var/www/localhost/htdocs/splexception.php on line 6 This problem does not occur when using opendir so this seems to be SPL related. Category changed accordingly I wasn't able to reproduce the instanceof crash with this small snippet. ------------------------------------------------------------------------ The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at http://bugs.php.net/32171 -- Edit this bug report at http://bugs.php.net/?id=32171&edit=1