Index: sys/cam/scsi/scsi_pass.c
===================================================================
--- sys/cam/scsi/scsi_pass.c
+++ sys/cam/scsi/scsi_pass.c
@@ -30,6 +30,8 @@
 #include <sys/cdefs.h>
 __FBSDID("$FreeBSD$");
 
+#include "opt_compat.h"
+
 #include <sys/param.h>
 #include <sys/systm.h>
 #include <sys/kernel.h>
@@ -45,6 +47,7 @@
 #include <sys/poll.h>
 #include <sys/selinfo.h>
 #include <sys/sdt.h>
+#include <sys/sysent.h>
 #include <sys/taskqueue.h>
 #include <vm/uma.h>
 #include <vm/vm.h>
@@ -1859,6 +1862,12 @@
 		union ccb **user_ccb, *ccb;
 		xpt_opcode fc;
 
+#ifdef COMPAT_FREEBSD32
+		if (SV_CURPROC_FLAG(SV_ILP32)) {
+			error = ENOTTY;
+			goto bailout;
+		}
+#endif
 		if ((softc->flags & PASS_FLAG_ZONE_VALID) == 0) {
 			error = passcreatezone(periph);
 			if (error != 0)
@@ -2033,6 +2042,12 @@
 		struct pass_io_req *io_req;
 		int old_error;
 
+#ifdef COMPAT_FREEBSD32
+		if (SV_CURPROC_FLAG(SV_ILP32)) {
+			error = ENOTTY;
+			goto bailout;
+		}
+#endif
 		user_ccb = (union ccb **)addr;
 		old_error = 0;