--- kernel/bsd/hfs/hfs_vfsutils.c	2018/04/24 18:26:05	1.1
+++ kernel/bsd/hfs/hfs_vfsutils.c	2018/04/24 18:30:56	1.1.1.2
@@ -792,7 +792,7 @@ short hfsGet( ExtendedVCB *vcb, hfsCatal
             Boolean 	unlockPar = false;
 			
 			/* Get the complex vnode, creating it if none existed */
-            if (dvp->v_type == VCPLX) {
+            if ((dvp != NULL) && (dvp->v_type == VCPLX)) {
                 cp = dvp;
             }
             else {
@@ -816,7 +816,8 @@ short hfsGet( ExtendedVCB *vcb, hfsCatal
             fm = VTOH(cp)->h_meta;
 			DBG_ASSERT(fm);
             /* Increment the usecount, to make sure it doesnt go away on us */
-            fm->h_usecount++;
+            if (++fm->h_usecount == 0)
+		panic("hfsGet: h_usecount");
             lockmgr(&fm->h_fmetalock, LK_EXCLUSIVE, (struct slock *)0, CURRENT_PROC);
             hp->h_relative = cp;
             if (forkType == kDataFork)					/* Init downlink */