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path: root/drivers/s390/crypto/zcrypt_pcixcc.c
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Diffstat (limited to 'drivers/s390/crypto/zcrypt_pcixcc.c')
-rw-r--r--drivers/s390/crypto/zcrypt_pcixcc.c32
1 files changed, 10 insertions, 22 deletions
diff --git a/drivers/s390/crypto/zcrypt_pcixcc.c b/drivers/s390/crypto/zcrypt_pcixcc.c
index dd4737808e06..077b7d109fde 100644
--- a/drivers/s390/crypto/zcrypt_pcixcc.c
+++ b/drivers/s390/crypto/zcrypt_pcixcc.c
@@ -56,11 +56,6 @@
#define PCIXCC_MAX_ICA_RESPONSE_SIZE 0x77c /* max size type86 v2 reply */
#define PCIXCC_MAX_XCRB_MESSAGE_SIZE (12*1024)
-#define PCIXCC_MAX_XCRB_RESPONSE_SIZE PCIXCC_MAX_XCRB_MESSAGE_SIZE
-#define PCIXCC_MAX_XCRB_DATA_SIZE (11*1024)
-#define PCIXCC_MAX_XCRB_REPLY_SIZE (5*1024)
-
-#define PCIXCC_MAX_RESPONSE_SIZE PCIXCC_MAX_XCRB_RESPONSE_SIZE
#define PCIXCC_CLEANUP_TIME (15*HZ)
@@ -265,7 +260,7 @@ static int ICACRT_msg_to_type6CRT_msgX(struct zcrypt_device *zdev,
* @ap_msg: pointer to AP message
* @xcRB: pointer to user input data
*
- * Returns 0 on success or -EFAULT.
+ * Returns 0 on success or -EFAULT, -EINVAL.
*/
struct type86_fmt2_msg {
struct type86_hdr hdr;
@@ -295,19 +290,12 @@ static int XCRB_msg_to_type6CPRB_msgX(struct zcrypt_device *zdev,
CEIL4(xcRB->request_control_blk_length) +
xcRB->request_data_length;
if (ap_msg->length > PCIXCC_MAX_XCRB_MESSAGE_SIZE)
- return -EFAULT;
- if (CEIL4(xcRB->reply_control_blk_length) > PCIXCC_MAX_XCRB_REPLY_SIZE)
- return -EFAULT;
- if (CEIL4(xcRB->reply_data_length) > PCIXCC_MAX_XCRB_DATA_SIZE)
- return -EFAULT;
- replylen = CEIL4(xcRB->reply_control_blk_length) +
- CEIL4(xcRB->reply_data_length) +
- sizeof(struct type86_fmt2_msg);
- if (replylen > PCIXCC_MAX_XCRB_RESPONSE_SIZE) {
- xcRB->reply_control_blk_length = PCIXCC_MAX_XCRB_RESPONSE_SIZE -
- (sizeof(struct type86_fmt2_msg) +
- CEIL4(xcRB->reply_data_length));
- }
+ return -EINVAL;
+ replylen = sizeof(struct type86_fmt2_msg) +
+ CEIL4(xcRB->reply_control_blk_length) +
+ xcRB->reply_data_length;
+ if (replylen > PCIXCC_MAX_XCRB_MESSAGE_SIZE)
+ return -EINVAL;
/* prepare type6 header */
msg->hdr = static_type6_hdrX;
@@ -326,7 +314,7 @@ static int XCRB_msg_to_type6CPRB_msgX(struct zcrypt_device *zdev,
return -EFAULT;
if (msg->cprbx.cprb_len + sizeof(msg->hdr.function_code) >
xcRB->request_control_blk_length)
- return -EFAULT;
+ return -EINVAL;
function_code = ((unsigned char *)&msg->cprbx) + msg->cprbx.cprb_len;
memcpy(msg->hdr.function_code, function_code, sizeof(msg->hdr.function_code));
@@ -678,7 +666,7 @@ static void zcrypt_pcixcc_receive(struct ap_device *ap_dev,
break;
case PCIXCC_RESPONSE_TYPE_XCRB:
length = t86r->fmt2.offset2 + t86r->fmt2.count2;
- length = min(PCIXCC_MAX_XCRB_RESPONSE_SIZE, length);
+ length = min(PCIXCC_MAX_XCRB_MESSAGE_SIZE, length);
memcpy(msg->message, reply->message, length);
break;
default:
@@ -1043,7 +1031,7 @@ static int zcrypt_pcixcc_probe(struct ap_device *ap_dev)
struct zcrypt_device *zdev;
int rc = 0;
- zdev = zcrypt_device_alloc(PCIXCC_MAX_RESPONSE_SIZE);
+ zdev = zcrypt_device_alloc(PCIXCC_MAX_XCRB_MESSAGE_SIZE);
if (!zdev)
return -ENOMEM;
zdev->ap_dev = ap_dev;