From: Matthew Garrett <mjg59@google.com>
Date: Wed, 11 Oct 2017 19:11:12 +0000 (-0700)
Subject: EVM: Only complain about a missing HMAC key once
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=0485d066d82c308e28e76b7fc6cdec46ae46eeb6;p=linux.git

EVM: Only complain about a missing HMAC key once

A system can validate EVM digital signatures without requiring an HMAC
key, but every EVM validation will generate a kernel error. Change this
so we only generate an error once.

Signed-off-by: Matthew Garrett <mjg59@google.com>
Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
---

diff --git a/security/integrity/evm/evm_crypto.c b/security/integrity/evm/evm_crypto.c
index 1d32cd20009a3..bcd64baf87881 100644
--- a/security/integrity/evm/evm_crypto.c
+++ b/security/integrity/evm/evm_crypto.c
@@ -80,7 +80,7 @@ static struct shash_desc *init_desc(char type)
 
 	if (type == EVM_XATTR_HMAC) {
 		if (!(evm_initialized & EVM_INIT_HMAC)) {
-			pr_err("HMAC key is not set\n");
+			pr_err_once("HMAC key is not set\n");
 			return ERR_PTR(-ENOKEY);
 		}
 		tfm = &hmac_tfm;