Index: head/sys/kern/vfs_subr.c
===================================================================
--- head/sys/kern/vfs_subr.c
+++ head/sys/kern/vfs_subr.c
@@ -2861,6 +2861,8 @@
 	 * Remove a vnode from the free list, mark it as in use,
 	 * and put it on the active list.
 	 */
+	VNASSERT(vp->v_mount != NULL, vp,
+	    ("_vhold: vnode not on per mount vnode list"));
 	mp = vp->v_mount;
 	mtx_lock(&mp->mnt_listmtx);
 	if ((vp->v_mflag & VMP_TMPMNTFREELIST) != 0) {
@@ -2935,21 +2937,35 @@
 		if ((vp->v_iflag & VI_OWEINACT) == 0) {
 			vp->v_iflag &= ~VI_ACTIVE;
 			mp = vp->v_mount;
-			mtx_lock(&mp->mnt_listmtx);
-			if (active) {
-				TAILQ_REMOVE(&mp->mnt_activevnodelist, vp,
+			if (mp != NULL) {
+				mtx_lock(&mp->mnt_listmtx);
+				if (active) {
+					TAILQ_REMOVE(&mp->mnt_activevnodelist,
+					    vp, v_actfreelist);
+					mp->mnt_activevnodelistsize--;
+				}
+				TAILQ_INSERT_TAIL(&mp->mnt_tmpfreevnodelist,
+				    vp, v_actfreelist);
+				mp->mnt_tmpfreevnodelistsize++;
+				vp->v_iflag |= VI_FREE;
+				vp->v_mflag |= VMP_TMPMNTFREELIST;
+				VI_UNLOCK(vp);
+				if (mp->mnt_tmpfreevnodelistsize >=
+				    mnt_free_list_batch)
+					vnlru_return_batch_locked(mp);
+				mtx_unlock(&mp->mnt_listmtx);
+			} else {
+				VNASSERT(active == 0, vp,
+				    ("vdropl: active vnode not on per mount "
+				    "vnode list"));
+				mtx_lock(&vnode_free_list_mtx);
+				TAILQ_INSERT_TAIL(&vnode_free_list, vp,
 				    v_actfreelist);
-				mp->mnt_activevnodelistsize--;
+				freevnodes++;
+				vp->v_iflag |= VI_FREE;
+				VI_UNLOCK(vp);
+				mtx_unlock(&vnode_free_list_mtx);
 			}
-			TAILQ_INSERT_TAIL(&mp->mnt_tmpfreevnodelist, vp,
-			    v_actfreelist);
-			mp->mnt_tmpfreevnodelistsize++;
-			vp->v_iflag |= VI_FREE;
-			vp->v_mflag |= VMP_TMPMNTFREELIST;
-			VI_UNLOCK(vp);
-			if (mp->mnt_tmpfreevnodelistsize >= mnt_free_list_batch)
-				vnlru_return_batch_locked(mp);
-			mtx_unlock(&mp->mnt_listmtx);
 		} else {
 			VI_UNLOCK(vp);
 			counter_u64_add(free_owe_inact, 1);