D55028.diff
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	diff --git a/sys/fs/devfs/devfs_vnops.c b/sys/fs/devfs/devfs_vnops.c
	--- a/sys/fs/devfs/devfs_vnops.c
	+++ b/sys/fs/devfs/devfs_vnops.c
	@@ -367,6 +367,9 @@

	ASSERT_VOP_LOCKED(vp, "devfs_populate_vp");

	+ if (VN_IS_DOOMED(vp))
	+ return (ENOENT);
	+
	dmp = VFSTODEVFS(vp->v_mount);
	if (!devfs_populate_needed(dmp)) {
	sx_xlock(&dmp->dm_lock);
	@@ -1128,8 +1131,25 @@
	cdev = NULL;
	DEVFS_DMP_HOLD(dmp);
	sx_xunlock(&dmp->dm_lock);
	+ dvplocked = VOP_ISLOCKED(dvp);
	+
	+ /*
	+ * Invoke the dev_clone handler. Unlock dvp around it
	+ * to simplify the cloner operations.
	+ *
	+ * If dvp is reclaimed while we unlocked it, we return
	+ * with ENOENT by some of the paths below. If cloner
	+ * returned cdev, then devfs_populate_vp() notes the
	+ * reclamation. Otherwise, note that either our devfs
	+ * mount is being unmounted, then DEVFS_DMP_DROP()
	+ * returns true, and we return ENOENT this way. Or,
	+ * because de == NULL, the check for it after the loop
	+ * returns ENOENT.
	+ */
	+ VOP_UNLOCK(dvp);
	EVENTHANDLER_INVOKE(dev_clone,
	td->td_ucred, pname, strlen(pname), &cdev);
	+ vn_lock(dvp, dvplocked \| LK_RETRY);

	if (cdev == NULL)
	sx_xlock(&dmp->dm_lock);