[PHP-BUG] Bug #51404 [NEW]: is_dir() returns false on cifs mounted share

From:             
Operating system: Linux
PHP version:      Irrelevant
Package:          Directory function related
Bug Type:         Bug
Bug description:is_dir() returns false on cifs mounted share

Description:
------------
I upgraded my kernel to 2.6.31 (stable) and has php-5.2.12 (stable), but
php function is_dir() returns false for folder on my cifs mounted share.

strace php -r 'var_dump(is_dir("/path_to_mounted_folder/"));'

...
stat64("/path_to_mounted_folder/", {st_mode=S_IFDIR|0755, st_size=32768,
...}) = 0 
gettimeofday({1269602972, 30466}, NULL) = 0
write(1, "bool(false)\n", 12bool(false)
)           = 12
...  

Test script:
---------------
php -r 'var_dump(is_dir("/path_to_mounted_folder/"));'

Expected result:
----------------
bool(true)

Actual result:
--------------
bool(false)

-- 
Edit bug report at http://bugs.php.net/bug.php?id=51404&edit=1
-- 
Try a snapshot (PHP 5.2):            http://bugs.php.net/fix.php?id=51404&r=trysnapshot52
Try a snapshot (PHP 5.3):            http://bugs.php.net/fix.php?id=51404&r=trysnapshot53
Try a snapshot (PHP 6.0):            http://bugs.php.net/fix.php?id=51404&r=trysnapshot60
Fixed in SVN:                        http://bugs.php.net/fix.php?id=51404&r=fixed
Fixed in SVN and need be documented: http://bugs.php.net/fix.php?id=51404&r=needdocs
Fixed in release:                    http://bugs.php.net/fix.php?id=51404&r=alreadyfixed
Need backtrace:                      http://bugs.php.net/fix.php?id=51404&r=needtrace
Need Reproduce Script:               http://bugs.php.net/fix.php?id=51404&r=needscript
Try newer version:                   http://bugs.php.net/fix.php?id=51404&r=oldversion
Not developer issue:                 http://bugs.php.net/fix.php?id=51404&r=support
Expected behavior:                   http://bugs.php.net/fix.php?id=51404&r=notwrong
Not enough info:                     http://bugs.php.net/fix.php?id=51404&r=notenoughinfo
Submitted twice:                     http://bugs.php.net/fix.php?id=51404&r=submittedtwice
register_globals:                    http://bugs.php.net/fix.php?id=51404&r=globals
PHP 4 support discontinued:          http://bugs.php.net/fix.php?id=51404&r=php4
Daylight Savings:                    http://bugs.php.net/fix.php?id=51404&r=dst
IIS Stability:                       http://bugs.php.net/fix.php?id=51404&r=isapi
Install GNU Sed:                     http://bugs.php.net/fix.php?id=51404&r=gnused
Floating point limitations:          http://bugs.php.net/fix.php?id=51404&r=float
No Zend Extensions:                  http://bugs.php.net/fix.php?id=51404&r=nozend
MySQL Configuration Error:           http://bugs.php.net/fix.php?id=51404&r=mysqlcfg