[src/trunk]: src/sys/miscfs/deadfs Make dead vfs ops "vfs_statvfs" and "vfs_v...

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

details:   https://anonhg.NetBSD.org/src/rev/2569b19be8af
branches:  trunk
changeset: 368379:2569b19be8af
user:      hannken <hannken%NetBSD.org@localhost>
date:      Fri Jul 08 07:44:17 2022 +0000

description:
Make dead vfs ops "vfs_statvfs" and "vfs_vptofh" return EOPNOTSUPP.
Both operations may originate from (possible dead) vnodes.

Reported-by: syzbot+eceb203d44457742be3b%syzkaller.appspotmail.com@localhost

diffstat:

 sys/miscfs/deadfs/dead_vfsops.c |  8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)

diffs (34 lines):

diff -r e544011dc81e -r 2569b19be8af sys/miscfs/deadfs/dead_vfsops.c
--- a/sys/miscfs/deadfs/dead_vfsops.c   Fri Jul 08 07:43:48 2022 +0000
+++ b/sys/miscfs/deadfs/dead_vfsops.c   Fri Jul 08 07:44:17 2022 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: dead_vfsops.c,v 1.11 2022/03/19 13:53:32 hannken Exp $ */
+/*     $NetBSD: dead_vfsops.c,v 1.12 2022/07/08 07:44:17 hannken Exp $ */
 
 /*-
  * Copyright (c) 2014 The NetBSD Foundation, Inc.
@@ -30,7 +30,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: dead_vfsops.c,v 1.11 2022/03/19 13:53:32 hannken Exp $");
+__KERNEL_RCSID(0, "$NetBSD: dead_vfsops.c,v 1.12 2022/07/08 07:44:17 hannken Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -60,13 +60,13 @@
        .vfs_unmount = (void *)dead_panic,
        .vfs_root = (void *)dead_panic,
        .vfs_quotactl = (void *)dead_panic,
-       .vfs_statvfs = (void *)dead_panic,
+       .vfs_statvfs = (void *)eopnotsupp,
        .vfs_sync = (void *)dead_panic,
        .vfs_vget = (void *)dead_panic,
        .vfs_loadvnode = (void *)dead_panic,
        .vfs_newvnode = dead_newvnode,
        .vfs_fhtovp = (void *)dead_panic,
-       .vfs_vptofh = (void *)dead_panic,
+       .vfs_vptofh = (void *)eopnotsupp,
        .vfs_init = (void *)dead_panic,
        .vfs_reinit = (void *)dead_panic,
        .vfs_done = (void *)dead_panic,