Index: sys/kern/kern_descrip.c
===================================================================
--- sys/kern/kern_descrip.c
+++ sys/kern/kern_descrip.c
@@ -4194,6 +4194,8 @@
 		if (fdp == NULL)
 			continue;
 		FILEDESC_SLOCK(fdp);
+		if (refcount_load(&fdp->fd_refcnt) == 0)
+			goto nextproc;
 		FILEDESC_FOREACH_FP(fdp, n, fp) {
 			if (refcount_load(&fdp->fd_refcnt) == 0)
 				break;
@@ -4210,6 +4212,7 @@
 			if (error)
 				break;
 		}
+nextproc:
 		FILEDESC_SUNLOCK(fdp);
 		fddrop(fdp);
 		if (error)
@@ -4469,6 +4472,8 @@
 	if (pwd != NULL)
 		pwd_drop(pwd);
 	FILEDESC_SLOCK(fdp);
+	if (refcount_load(&fdp->fd_refcnt) == 0)
+		goto skip;
 	FILEDESC_FOREACH_FP(fdp, i, fp) {
 		if (refcount_load(&fdp->fd_refcnt) == 0)
 			break;
@@ -4487,6 +4492,7 @@
 		if (error != 0)
 			break;
 	}
+skip:
 	FILEDESC_SUNLOCK(fdp);
 fail:
 	if (fdp != NULL)
@@ -4633,6 +4639,8 @@
 	if (pwd != NULL)
 		pwd_drop(pwd);
 	FILEDESC_SLOCK(fdp);
+	if (refcount_load(&fdp->fd_refcnt) == 0)
+		goto skip;
 	FILEDESC_FOREACH_FP(fdp, i, fp) {
 		if (refcount_load(&fdp->fd_refcnt) == 0)
 			break;
@@ -4645,6 +4653,7 @@
 		if (error)
 			break;
 	}
+skip:
 	FILEDESC_SUNLOCK(fdp);
 	fddrop(fdp);
 	pddrop(pdp);