From: Thomas Gleixner <tglx@linutronix.de>
Date: Wed, 9 Dec 2009 16:13:31 +0000 (+0100)
Subject: capabilities: Use RCU to protect task lookup in sys_capget
X-Git-Tag: v2.6.34-rc1~228^2^2~33
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=86fc80f16e8a2449d5827bf1a9838b7fd9f70097;p=pandora-kernel.git

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>
---

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