tree 23f4d20995f9538c6f609baa2d0bf3315f013b46
parent 67fa4880c5e059428392ca6f7c2f9c38e8546fea
author Thomas Gleixner <tglx@linutronix.de> 1260375211 +0100
committer James Morris <jmorris@namei.org> 1260398568 +1100

capabilities: Use RCU to protect task lookup in sys_capget

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@linutronix.de>
Signed-off-by: James Morris <jmorris@namei.org>