linux-kernel - [PATCH 2/6] keys: Invalidate used request

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Message-ID: <155856517715.11737.4000419348725296931.stgit@warthog.procyon.org.uk>
Date:   Wed, 22 May 2019 23:46:17 +0100
From:   David Howells <dhowells@...hat.com>
To:     keyrings@...r.kernel.org
Cc:     dhowells@...hat.com, linux-afs@...ts.infradead.org,
        linux-security-module@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 2/6] keys: Invalidate used request_key authentication keys

Invalidate used request_key authentication keys rather than revoking them
so that they get cleaned up immediately rather than potentially hanging
around.  There doesn't seem any need to keep the revoked keys around.

Signed-off-by: David Howells <dhowells@...hat.com>
---

 security/keys/key.c         |    4 ++--
 security/keys/request_key.c |    2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/security/keys/key.c b/security/keys/key.c
index e0750bc85b68..00c7dbfc6a77 100644
--- a/security/keys/key.c
+++ b/security/keys/key.c
@@ -459,7 +459,7 @@ static int __key_instantiate_and_link(struct key *key,
 
 			/* disable the authorisation key */
 			if (authkey)
-				key_revoke(authkey);
+				key_invalidate(authkey);
 
 			if (prep->expiry != TIME64_MAX) {
 				key->expiry = prep->expiry;
@@ -607,7 +607,7 @@ int key_reject_and_link(struct key *key,
 
 		/* disable the authorisation key */
 		if (authkey)
-			key_revoke(authkey);
+			key_invalidate(authkey);
 	}
 
 	mutex_unlock(&key_construction_mutex);
diff --git a/security/keys/request_key.c b/security/keys/request_key.c
index d204d7c0152e..807c32b2c736 100644
--- a/security/keys/request_key.c
+++ b/security/keys/request_key.c
@@ -222,7 +222,7 @@ static int construct_key(struct key *key, const void *callout_info,
 	/* check that the actor called complete_request_key() prior to
 	 * returning an error */
 	WARN_ON(ret < 0 &&
-		!test_bit(KEY_FLAG_REVOKED, &authkey->flags));
+		!test_bit(KEY_FLAG_INVALIDATED, &authkey->flags));
 
 	key_put(authkey);
 	kleave(" = %d", ret);