Index: head/sys/cam/scsi/scsi_enc.c
===================================================================
--- head/sys/cam/scsi/scsi_enc.c
+++ head/sys/cam/scsi/scsi_enc.c
@@ -489,6 +489,10 @@
 		cam_periph_lock(periph);
 		error = enc->enc_vec.handle_string(enc, &sstr, cmd);
 		cam_periph_unlock(periph);
+		if (error == 0 || error == ENOMEM)
+			(void)copyout(&sstr.bufsiz,
+			    &((encioc_string_t *)addr)->bufsiz,
+			    sizeof(sstr.bufsiz));
 		break;
 
 	case ENCIOC_GETELMSTAT:
Index: head/sys/cam/scsi/scsi_enc_ses.c
===================================================================
--- head/sys/cam/scsi/scsi_enc_ses.c
+++ head/sys/cam/scsi/scsi_enc_ses.c
@@ -2926,11 +2926,11 @@
 		    vendor, product, rev) + 1;
 		if (rsize > sizeof(str))
 			rsize = sizeof(str);
-		copyout(&rsize, &sstr->bufsiz, sizeof(rsize));
 		size = rsize;
 		if (size > sstr->bufsiz)
 			size = sstr->bufsiz;
 		copyout(str, sstr->buf, size);
+		sstr->bufsiz = rsize;
 		return (size == rsize ? 0 : ENOMEM);
 	case ENCIOC_GETENCID:
 		if (ses_cache->ses_nsubencs < 1)
@@ -2940,11 +2940,11 @@
 		    scsi_8btou64(enc_desc->logical_id)) + 1;
 		if (rsize > sizeof(str))
 			rsize = sizeof(str);
-		copyout(&rsize, &sstr->bufsiz, sizeof(rsize));
 		size = rsize;
 		if (size > sstr->bufsiz)
 			size = sstr->bufsiz;
 		copyout(str, sstr->buf, size);
+		sstr->bufsiz = rsize;
 		return (size == rsize ? 0 : ENOMEM);
 	default:
 		return (EINVAL);