From f37a216e6e21c17806a31554a83408a791149ae5 Mon Sep 17 00:00:00 2001
From: Taylor R Campbell <riastradh@NetBSD.org>
Date: Wed, 19 Jan 2022 01:16:23 +0000
Subject: [PATCH 19/37] specfs: If sd_opencnt is zero, sn_opencnt had better be
 zero.

---
 sys/miscfs/specfs/spec_vnops.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sys/miscfs/specfs/spec_vnops.c b/sys/miscfs/specfs/spec_vnops.c
index f724241574b3..55c193afc860 100644
--- a/sys/miscfs/specfs/spec_vnops.c
+++ b/sys/miscfs/specfs/spec_vnops.c
@@ -571,6 +571,7 @@ spec_open(void *v)
 			error = EBUSY;
 			break;
 		}
+		KASSERTMSG(sn->sn_opencnt == 0, "%u", sn->sn_opencnt);
 		sn->sn_opencnt = 1;
 		sd->sd_opencnt = 1;
 		sd->sd_bdevvp = vp;