KEYS: testing wrong bit for KEY_FLAG_REVOKED

The test for "if (cred->request_key_auth->flags & KEY_FLAG_REVOKED) {"
should actually testing that the (1 << KEY_FLAG_REVOKED) bit is set.
The current code actually checks for KEY_FLAG_DEAD.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: James Morris <james.l.morris@oracle.com>

security/keys/process_keys.c

@@ -657,7 +657,8 @@ key_ref_t lookup_user_key(key_serial_t id, unsigned long lflags,
 			goto error;
 
 		down_read(&cred->request_key_auth->sem);
-		if (cred->request_key_auth->flags & KEY_FLAG_REVOKED) {
+		if (test_bit(KEY_FLAG_REVOKED,
+			     &cred->request_key_auth->flags)) {
 			key_ref = ERR_PTR(-EKEYREVOKED);
 			key = NULL;
 		} else {