On Wed, Mar 24, 2010 at 10:47:42PM +0100, Andrea Arcangeli wrote:
> As far as I can tell, VM_BUG_ON would make _zero_ differences there.
>
> I think you mistaken a VM_BUG_ON for a:
>
> if (could_be_null->something) {
Ooops, I wrote ->something to indicate that "could_be_null" was going
to later be dereferenced for ->something and here we're checking if it
could be null when we dereference something, but now I think it could
be very confusing as I use strict C for all the rest, so maybe I
should clarify in C it would be !could_be_null.
> WARN_ON(1);
> return -ESOMETHING;
> }
>
> adding a VM_BUG_ON(inode->something) would _still_ be as exploitable
here the same !inode.
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