[S390] zcrypt: initialize ap_messages for cex3 exploitation

AP messages need to be initialized, before they will be used. Values
will be zeroized. This will be needed later when introducing support
for the special commands.

Signed-off-by: Felix Beck <felix.beck@de.ibm.com>
Signed-off-by: Ralph Wuerthner <ralph.wuerthner@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/s390/crypto/zcrypt_pcicc.c b/drivers/s390/crypto/zcrypt_pcicc.c
index f4b0c479543..a23726a0735 100644
--- a/drivers/s390/crypto/zcrypt_pcicc.c
+++ b/drivers/s390/crypto/zcrypt_pcicc.c
@@ -483,6 +483,7 @@ static long zcrypt_pcicc_modexpo(struct zcrypt_device *zdev,
         struct completion work;
         int rc;
 
+        ap_init_message(&ap_msg);
         ap_msg.message = (void *) get_zeroed_page(GFP_KERNEL);
         if (!ap_msg.message)
                 return -ENOMEM;
@@ -521,6 +522,7 @@ static long zcrypt_pcicc_modexpo_crt(struct zcrypt_device *zdev,
         struct completion work;
         int rc;
 
+        ap_init_message(&ap_msg);
         ap_msg.message = (void *) get_zeroed_page(GFP_KERNEL);
         if (!ap_msg.message)
                 return -ENOMEM;