Index: sys/kern/kern_proc.c
===================================================================
--- sys/kern/kern_proc.c	(revision 277957)
+++ sys/kern/kern_proc.c	(working copy)
@@ -2337,6 +2337,11 @@
 				break;
 			case OBJT_SWAP:
 				kve->kve_type = KVME_TYPE_SWAP;
+				if ((lobj->flags & OBJ_TMPFS) != 0)
+				{
+					vp = lobj->un_pager.swp.swp_tmpfs;
+					vref(vp);
+				}
 				break;
 			case OBJT_DEVICE:
 				kve->kve_type = KVME_TYPE_DEVICE;