Index: sys/opencrypto/cryptodev.c
===================================================================
--- sys/opencrypto/cryptodev.c
+++ sys/opencrypto/cryptodev.c
@@ -854,7 +854,7 @@
 			goto bail;
 		}
 		if ((error = copyin(cop->iv, crde->crd_iv,
-		    cse->txform->blocksize))) {
+		    cse->txform->ivsize))) {
 			SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 			goto bail;
 		}
@@ -864,8 +864,8 @@
 		crde->crd_skip = 0;
 	} else if (crde) {
 		crde->crd_flags |= CRD_F_IV_PRESENT;
-		crde->crd_skip = cse->txform->blocksize;
-		crde->crd_len -= cse->txform->blocksize;
+		crde->crd_skip = cse->txform->ivsize;
+		crde->crd_len -= cse->txform->ivsize;
 	}
 
 	if (cop->mac && crda == NULL) {
@@ -1032,8 +1032,8 @@
 		crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT;
 	} else {
 		crde->crd_flags |= CRD_F_IV_PRESENT;
-		crde->crd_skip += cse->txform->blocksize;
-		crde->crd_len -= cse->txform->blocksize;
+		crde->crd_skip += cse->txform->ivsize;
+		crde->crd_len -= cse->txform->ivsize;
 	}
 
 	if ((error = copyin(caead->tag, (caddr_t)cod->uio.uio_iov[0].iov_base +