Commit f041ae2f authored Sep 02, 2009 by David Howells Committed by James Morris Sep 02, 2009

KEYS: Flag dead keys to induce EKEYREVOKED [try #6]



Set the KEY_FLAG_DEAD flag on keys for which the type has been removed.  This
causes the key_permission() function to return EKEYREVOKED in response to
various commands.  It does not, however, prevent unlinking or clearing of
keyrings from detaching the key.

Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Serge Hallyn <serue@us.ibm.com>
Signed-off-by: James Morris <jmorris@namei.org>

parent 0c2c9a3f

security/keys/key.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -956,8 +956,10 @@ void unregister_key_type(struct key_type *ktype)
		for (_n = rb_first(&key_serial_tree); _n; _n = rb_next(_n)) {
		key = rb_entry(_n, struct key, serial_node);

		if (key->type == ktype)
		if (key->type == ktype) {
		key->type = &key_type_dead;
		set_bit(KEY_FLAG_DEAD, &key->flags);
		}
		}

		spin_unlock(&key_serial_lock);

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