[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, 5 insertions, 0 deletions

diff --git a/drivers/s390/crypto/zcrypt_pcixcc.c b/drivers/s390/crypto/zcrypt_pcixcc.c
index 5677b40e4ac0..11ca6dc99b23 100644
--- a/drivers/s390/crypto/zcrypt_pcixcc.c
+++ b/drivers/s390/crypto/zcrypt_pcixcc.c
@@ -688,6 +688,7 @@ static long zcrypt_pcixcc_modexpo(struct zcrypt_device *zdev,
         };
         int rc;
 
+        ap_init_message(&ap_msg);
         ap_msg.message = (void *) get_zeroed_page(GFP_KERNEL);
         if (!ap_msg.message)
                 return -ENOMEM;
@@ -727,6 +728,7 @@ static long zcrypt_pcixcc_modexpo_crt(struct zcrypt_device *zdev,
         };
         int rc;
 
+        ap_init_message(&ap_msg);
         ap_msg.message = (void *) get_zeroed_page(GFP_KERNEL);
         if (!ap_msg.message)
                 return -ENOMEM;
@@ -766,6 +768,7 @@ static long zcrypt_pcixcc_send_cprb(struct zcrypt_device *zdev,
         };
         int rc;
 
+        ap_init_message(&ap_msg);
         ap_msg.message = kmalloc(PCIXCC_MAX_XCRB_MESSAGE_SIZE, GFP_KERNEL);
         if (!ap_msg.message)
                 return -ENOMEM;
@@ -805,6 +808,7 @@ static long zcrypt_pcixcc_rng(struct zcrypt_device *zdev,
         };
         int rc;
 
+        ap_init_message(&ap_msg);
         ap_msg.message = kmalloc(PCIXCC_MAX_XCRB_MESSAGE_SIZE, GFP_KERNEL);
         if (!ap_msg.message)
                 return -ENOMEM;
@@ -972,6 +976,7 @@ static int zcrypt_pcixcc_rng_supported(struct ap_device *ap_dev)
         } __attribute__((packed)) *reply;
         int rc, i;
 
+        ap_init_message(&ap_msg);
         ap_msg.message = (void *) get_zeroed_page(GFP_KERNEL);
         if (!ap_msg.message)
                 return -ENOMEM;