From: Kasper Dupont <kasperd@daimi.au.dk>
Date: Tue, 06 Aug 2002 16:03:34 +0200
"David S. Miller" wrote:
> verify_area() checks aren't enough, consider a threaded application
> calling mprotect() while the copy is in progress.
Couldn't we just freeze all other processes with the same mm while
a copy_to_user is in progress?
What if we have to sleep and page in some memory from disk?
Your idea could lead to deadlock in a multi-threaded app.
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