Re: [PATCH] capabilities: Use RCU to protect task lookup insys_capget

[James Morris]

On Wed, 9 Dec 2009, Thomas Gleixner wrote:

> cap_get_target_pid() protects the task lookup with tasklist_lock.
> security_capget() is called under tasklist_lock as well but
> tasklist_lock does not protect anything there. The capabilities are
> protected by RCU already.
> 
> So tasklist_lock only protects the lookup and prevents the task going
> away, which can be done with rcu_read_lock() as well.
> 
> Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>


Applied to
git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6#next


-- 
James Morris
<jmorris@xxxxxxxxx>
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