Boost C++ Libraries: Ticket #5900: Access violation in boost filesystem 3 directory iterator

attachment set

Wed, 14 Sep 2011 11:55:54 GMT

attachment → directory_iterator.patch

Patch fixing a potential access violation when trying to read defective directories / directories for which windows replies with an error code in FindNextFile().

anonymous — Fri, 06 Jan 2012 01:59:51 GMT

We ran into the same problem on OSX, when a directory was deleted while we were in the middle of iterating over it. Note that if you don't want to or can't change the source to Boost as per the patch above, simply passing in an error_code to directory_iterator::increment() will circumvent the bug, since the bad dereference is buried in the exception creation.

anonymous — Wed, 18 Jan 2012 20:43:42 GMT

I was wrong in my previous comment stating that there was a work-around without changing the source to Boost. There's a second bug that stops this from working. directory_iterator_construct() does not pass the error code to "increment", so even if an error code is passed into directory_iterator_construct(), when it gets into directory_iterator_increment() the error code will be lost and the exception will trigger.

status changed

Beman Dawes — Wed, 18 Jan 2012 22:15:08 GMT

status new → assigned

I'm working Filesystem bugs right now. I'll work this one tomorrow or the next day.

Thanks,

--Beman

status, milestone changed; resolution set

Beman Dawes — Sun, 22 Jan 2012 02:21:20 GMT

status assigned → closed
resolution → fixed
milestone To Be Determined → Boost 1.49.0

Both the original bug and the bug reported in comment 3 have been fixed.

Thanks for the reports and the patch!

--Beman