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keys: distinguish per-uid keys in different namespaces

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per-uid keys were looked by uid only.  Use the user namespace
to distinguish the same uid in different namespaces.

This does not address key_permission.  So a task can for instance
try to join a keyring owned by the same uid in another namespace.
That will be handled by a separate patch.

Signed-off-by: Serge E. Hallyn <serue@us.ibm.com>
Acked-by: David Howells <dhowells@redhat.com>
Signed-off-by: James Morris <jmorris@namei.org>
This commit is contained in:
Serge E. Hallyn 2009-02-26 18:27:38 -06:00 • committed by James Morris
parent be38e0fd5f
commit 1d1e97562e
6 changed files with 17 additions and 6 deletions
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2
kernel/user.c
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@ -20,7 +20,7 @@
struct user_namespace init_user_ns = {
.kref = {
.refcount = ATOMIC_INIT(1),
.refcount = ATOMIC_INIT(2),
},
.creator = &root_user,
};