s390/crypto: use kfree_sensitive() instead of kfree()

key might contain private part of the key, so better use
kfree_sensitive() to free it.

Signed-off-by: Wang Ming <machel@vivo.com>
Reviewed-by: Harald Freudenberger <freude@linux.ibm.com>
Link: https://lore.kernel.org/r/20230717094533.18418-1-machel@vivo.com
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

diff --git a/arch/s390/crypto/paes_s390.c b/arch/s390/crypto/paes_s390.c
index d29a9d9..3834915 100644 (file)
--- a/arch/s390/crypto/paes_s390.c
+++ b/arch/s390/crypto/paes_s390.c
@@ -103,7 +103,7 @@ static inline void _free_kb_keybuf(struct key_blob *kb)
 {
        if (kb->key && kb->key != kb->keybuf
            && kb->keylen > sizeof(kb->keybuf)) {
-               kfree(kb->key);
+               kfree_sensitive(kb->key);
                kb->key = NULL;
        }
 }