Module Name: src
Committed By: riastradh
Date: Mon Oct 3 19:13:09 UTC 2022
Modified Files:
src/sys/dev: cons.c
Log Message:
cons(9): Check the unit number on close too.
Races between multiple opens, some of which fail, might lead to
closing a bad unit number -- not clear there's a good way to prevent
this.
To generate a diff of this commit:
cvs rdiff -u -r1.81 -r1.82 src/sys/dev/cons.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/dev/cons.c
diff -u src/sys/dev/cons.c:1.81 src/sys/dev/cons.c:1.82
--- src/sys/dev/cons.c:1.81 Mon Oct 3 19:12:51 2022
+++ src/sys/dev/cons.c Mon Oct 3 19:13:08 2022
@@ -1,4 +1,4 @@
-/* $NetBSD: cons.c,v 1.81 2022/10/03 19:12:51 riastradh Exp $ */
+/* $NetBSD: cons.c,v 1.82 2022/10/03 19:13:08 riastradh Exp $ */
/*
* Copyright (c) 1988 University of Utah.
@@ -39,7 +39,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: cons.c,v 1.81 2022/10/03 19:12:51 riastradh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: cons.c,v 1.82 2022/10/03 19:13:08 riastradh Exp $");
#include <sys/param.h>
#include <sys/proc.h>
@@ -175,6 +175,8 @@ cnclose(dev_t dev, int flag, int mode, s
int unit, error;
unit = minor(dev);
+ if (unit > 1)
+ return ENODEV;
mutex_enter(&cn_lock);
