ID:               40858
 Updated by:       [EMAIL PROTECTED]
 Reported By:      scottmacvicar at ntlworld dot com
-Status:           Open
+Status:           Assigned
 Bug Type:         GD related
 Operating System: RHEL 4
 PHP Version:      5.2.1
-Assigned To:      
+Assigned To:      pajoye
 New Comment:

Assigned to the maintainer.


Previous Comments:
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[2007-03-19 18:41:15] scottmacvicar at ntlworld dot com

Description:
------------
Appears to be still several more thread safety issues in GD, I've not
had time to track these all down yet.

We're running gdft.c from CVS to fix a few identified issues already.
Looking at the code there still appears to be a race condition within
the code but it appears to be a pretty tight loop since its not
happening as often as before.

By looking at gdft.c it looks possible for a fontCache entry to exist
during a check, by the time it gets to obtaining the lock the fontCache
has been cleared or something similarly evil.

The backtrace we've got is:
http://public.vbulletin.com/bugs/php/gdcache-bt.txt

Patch for first issue to deal with the possibility that a cache entry
is null: http://public.vbulletin.com/bugs/php/gdcache-patch-1.txt

Potential patch for second issue to deal with gdCacheSetup thread
safety: http://public.vbulletin.com/bugs/php/gdcache-patch-2.txt



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