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Bug #58047 infinite loop and/or mem. corruption after calling mailparse_msg_get_part_data
Submitted: 2008-02-20 02:54 UTC Modified: 2008-03-03 13:38 UTC
From: mpb dot mail at gmail dot com Assigned:
Status: Closed Package: mailparse (PECL)
PHP Version: 5.2.1 OS: Linux
Private report: No CVE-ID: None
 [2008-02-20 02:54 UTC] mpb dot mail at gmail dot com
I have a function similar to the following:

function part_data ($headers) {
  $msg = mailparse_msg_create ();
  mailparse_msg_parse ($msg, $headers);
  $part = mailparse_msg_get_part ($msg, '1');
  $part_data = mailparse_msg_get_part_data ($part);
  return $part_data; }

After calling this function (but not immediately after), PHP will infinite loop and/or the contents of $part_data will be corrupted.

I believe the reason for this is that $msg goes out of scope and gets garbage collected, which frees the $msg resource.  As part of freeing the $msg resource, I believe that the $part_data array (or perhaps one of the sub-arrays it contains) gets garbage collected prematurely.

The reason I believe this is that if I recursively copy $part_data, and then return the copy, everything works fine.  I therefore  suspect there is a reference counting bug inside of the mailparse extension.

The only reproduce code I have at present is part of a 900 line application.  I have not tried to create a small example that demonstrates the bug, but I might be able to do so if that would help you.



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 [2008-03-02 21:51 UTC] alan at akbkhome dot com
The extra delref on this line causes segfault on multi-line header entries
php_mailparse_mime.c:456  ZVAL_DELREF(*zheaderval);
- removing this line appears to fix the problem.
 [2008-03-03 13:38 UTC]
This bug has been fixed in CVS.

In case this was a documentation problem, the fix will show up at the
end of next Sunday (CET) on

In case this was a website problem, the change will show
up on the website in short time.
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