Messages in this thread | | | Date | Thu, 16 Feb 2012 21:48:38 -0500 | Subject | Re: [ubuntu-hardened] Add overflow protection to kref | From | David Windsor <> |
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<snip>
>> >> I have yet to see a patch, so why are we arguing about this? :) >> >> Again, I don't know of any kref overflows that have ever happened, so >> trying to "protect" this type of thing, seems odd to me. > > Well, I think the issue was to protect counting things (which seems to > be what PaX was after originally), and that kref seemed like the place > to put it. I'll let David take it further. >
Patches are forthcoming that will first introduce overflow protection to kref. Once that's in place, I'll move a few refcount users from atomic_t to kref as a reference for other subsystems; statistics-based users (and others not requiring overflow protection) can continue using atomic_t.
As Kees said, we just wanted to introduce the idea and get some general feedback before beginning. Thanks.
> Thanks, > > -Kees > > -- > Kees Cook > ChromeOS Security
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