From: Casey Schaufler <casey@schaufler-ca.com>
To: Andi Kleen <andi@firstfloor.org>
Cc: Andi Kleen <ak@linux.intel.com>,
jmorris@namei.org, linux-security-module@vger.kernel.org,
linux-kernel@vger.kernel.org,
Casey Schaufler <casey@schaufler-ca.com>
Subject: Re: [PATCH] SMACK: Add missing rcu_read_lock/unlock for process capability walk.
Date: Wed, 20 Apr 2011 17:47:40 -0700 [thread overview]
Message-ID: <4DAF7EAC.8010504@schaufler-ca.com> (raw)
In-Reply-To: <20110421000818.GT16484@one.firstfloor.org>
On 4/20/2011 5:08 PM, Andi Kleen wrote:
>> The global list, yes. The task specific list, no. Modifying the local
>> list is like any other modification of the cred structure and requires
>> the cred be copied.
> But you still need to free it eventually right? And that freeing will
> need RCU on the reader.
Entries are never freed from the global list. Someone is working
on a patch to do that, but is running into - wait for it - locking
issues.
Entries on the local lists are only freed when the task exits.
next prev parent reply other threads:[~2011-04-21 0:47 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-20 22:00 [PATCH] SMACK: Add missing rcu_read_lock/unlock for process capability walk Andi Kleen
2011-04-20 22:51 ` Casey Schaufler
2011-04-20 23:18 ` Andi Kleen
2011-04-20 23:43 ` Casey Schaufler
2011-04-21 0:08 ` Andi Kleen
2011-04-21 0:47 ` Casey Schaufler [this message]
2011-04-21 15:58 ` Andi Kleen
2011-04-22 3:55 ` Casey Schaufler
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