[src/trunk]: src/sys/kern Lock vnode for VOP_PATHCONF().

[hannken <hannken%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/5b39b8daca0c
branches:  trunk
changeset: 365241:5b39b8daca0c
user:      hannken <hannken%NetBSD.org@localhost>
date:      Sat Apr 16 07:59:02 2022 +0000

description:
Lock vnode for VOP_PATHCONF().

diffstat:

 sys/kern/sys_descrip.c |  6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diffs (28 lines):

diff -r 6e6b40ad3ef0 -r 5b39b8daca0c sys/kern/sys_descrip.c
--- a/sys/kern/sys_descrip.c    Sat Apr 16 07:58:21 2022 +0000
+++ b/sys/kern/sys_descrip.c    Sat Apr 16 07:59:02 2022 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: sys_descrip.c,v 1.39 2022/03/15 10:37:42 riastradh Exp $       */
+/*     $NetBSD: sys_descrip.c,v 1.40 2022/04/16 07:59:02 hannken Exp $ */
 
 /*-
  * Copyright (c) 2008, 2020 The NetBSD Foundation, Inc.
@@ -67,7 +67,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: sys_descrip.c,v 1.39 2022/03/15 10:37:42 riastradh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: sys_descrip.c,v 1.40 2022/04/16 07:59:02 hannken Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -595,7 +595,9 @@
                break;
 
        case DTYPE_VNODE:
+               vn_lock(fp->f_vnode, LK_SHARED | LK_RETRY);
                error = VOP_PATHCONF(fp->f_vnode, SCARG(uap, name), retval);
+               VOP_UNLOCK(fp->f_vnode);
                break;
 
        case DTYPE_KQUEUE: