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This page contains all of the posts and discussion on MemeStreams referencing the following web page: Creating Window Cycles. You can find discussions on MemeStreams as you surf the web, even if you aren't a MemeStreams member, using the Threads Bookmarklet.

Creating Window Cycles
by Security Reads at 1:51 pm EDT, Mar 16, 2010

When tearing off one of the toolbars in IDA 5.5 this morning, my Windows 7 virtual machine locked up, and became unresponsive. Of course, I immediately attached a debugger to see what was going on.

Creating Window Cycles
by Neoteric at 1:44 pm EDT, Apr 1, 2010

Yep! So as predicted, GetRealOwner(WindowC) is WindowC, and the exit condition will never be satisfied, it's stuck!

This was the first time I've encountered this bug while using IDA, and I haven't been able to reproduce it since, so I suspect there is some subtle race condition to blame. Thankfully I was able to recover my idb with minimal lost work, but the question remains, is it the developer's responsibility to guarantee they don't create cycles, or Microsofts?

I've mailed a testcase to Microsoft, but I'm not sure what they'll say.

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