Re: [patch 0/4] MAP_NOZERO v2 - VM_NOZERO/MAP_NOZERO early summer madness

Rik van Riel
2007-07-02T22:56:17Z

Davide Libenzi wrote:
> On Mon, 2 Jul 2007, Ulrich Drepper wrote:
>
>> On 7/2/07, Rik van Riel <riel@redhat.com> wrote:
>>> That should not happen. The default SELinux configuration
>>> in Fedora (and Debian?) runs a few daemons in their own
>>> restricted modes and has most of the system running in
>>> unconfined_t, including the majority of user programs.
>> This is the state as of F7. This will change hopefully soon.
>> Programs like firefox run by normal users must be confined, to. Any
>> tests using security must be fast, it's not something which is done
>> only for a few apps.
>
> The strong requirement would be that the cookie is not a bit longer than
> sizeof(unsigned long).

You could easily replace the cookie with a pointer to a free
page pool.

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