From: Ingo Franzki <ifranzki@linux.ibm.com>
Date: Wed, 20 Feb 2019 13:01:39 +0000 (+0100)
Subject: pkey: Indicate old mkvp only if old and current mkvp are different
X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=ebb7c695d3bc7a4986b92edc8d9ef43491be183e;p=openwrt%2Fstaging%2Fblogic.git

pkey: Indicate old mkvp only if old and current mkvp are different

When the CCA master key is set twice with the same master key,
then the old and the current master key are the same and thus the
verification patterns are the same, too. The check to report if a
secure key is currently wrapped by the old master key erroneously
reports old mkvp in this case.

Reviewed-by: Harald Freudenberger <freude@linux.ibm.com>
Signed-off-by: Ingo Franzki <ifranzki@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---

diff --git a/drivers/s390/crypto/pkey_api.c b/drivers/s390/crypto/pkey_api.c
index 2f92bbed4bf6..3e85d665c572 100644
--- a/drivers/s390/crypto/pkey_api.c
+++ b/drivers/s390/crypto/pkey_api.c
@@ -1079,7 +1079,7 @@ int pkey_verifykey(const struct pkey_seckey *seckey,
 	rc = mkvp_cache_fetch(cardnr, domain, mkvp);
 	if (rc)
 		goto out;
-	if (t->mkvp == mkvp[1]) {
+	if (t->mkvp == mkvp[1] && t->mkvp != mkvp[0]) {
 		DEBUG_DBG("%s secure key has old mkvp\n", __func__);
 		if (pattributes)
 			*pattributes |= PKEY_VERIFY_ATTR_OLD_MKVP;