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

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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>
This commit is contained in:
Ingo Franzki 2019-02-20 14:01:39 +01:00 committed by Martin Schwidefsky
parent 0ff06c44ef
commit ebb7c695d3
1 changed files with 1 additions and 1 deletions
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2
drivers/s390/crypto/pkey_api.c
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@ -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;