[src/trunk]: src/sys/arch/landisk/landisk Fix vnode locking around VOP_OPEN.

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

details:   https://anonhg.NetBSD.org/src/rev/641b91399996
branches:  trunk
changeset: 365925:641b91399996
user:      mlelstv <mlelstv%NetBSD.org@localhost>
date:      Tue May 03 14:20:24 2022 +0000

description:
Fix vnode locking around VOP_OPEN.

diffstat:

 sys/arch/landisk/landisk/autoconf.c |  6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diffs (34 lines):

diff -r 2a8b519a8fe3 -r 641b91399996 sys/arch/landisk/landisk/autoconf.c
--- a/sys/arch/landisk/landisk/autoconf.c       Tue May 03 14:11:59 2022 +0000
+++ b/sys/arch/landisk/landisk/autoconf.c       Tue May 03 14:20:24 2022 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: autoconf.c,v 1.9 2022/03/19 13:49:21 hannken Exp $     */
+/*     $NetBSD: autoconf.c,v 1.10 2022/05/03 14:20:24 mlelstv Exp $    */
 
 /*-
  * Copyright (c) 2002 The NetBSD Foundation, Inc.
@@ -27,7 +27,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: autoconf.c,v 1.9 2022/03/19 13:49:21 hannken Exp $");
+__KERNEL_RCSID(0, "$NetBSD: autoconf.c,v 1.10 2022/05/03 14:20:24 mlelstv Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -122,6 +122,7 @@
                vput(tmpvn);
                return (0);
        }
+       VOP_UNLOCK(tmpvn);
        error = VOP_IOCTL(tmpvn, DIOCGDINFO, &label, FREAD, NOCRED);
        if (error) {
                /*
@@ -140,6 +141,7 @@
                found = 1;
 
 closeout:
+       vn_lock(tmpvn, LK_EXCLUSIVE | LK_RETRY);
        VOP_CLOSE(tmpvn, FREAD, NOCRED);
        vput(tmpvn);
        return (found);