Re: [PATCH] SMACK: Add missing rcu_read_lock/unlock for process capabilitywalk.

[Casey Schaufler]

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.
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