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

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Message-ID: <156095857042.25264.613840154126127744.stgit@warthog.procyon.org.uk>
Date:   Wed, 19 Jun 2019 16:36:10 +0100
From:   David Howells <dhowells@...hat.com>
To:     keyrings@...r.kernel.org
Cc:     dhowells@...hat.com, linux-afs@...ts.infradead.org,
        linux-fsdevel@...r.kernel.org,
        linux-security-module@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 2/6] keys: Invalidate used request_key authentication keys
 [ver #2]

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 bba71acec886..e792d65c0af8 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;
@@ -616,7 +616,7 @@ 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 a6543ed98b1f..244e538d113f 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);