[src/trunk]: src/sys/ufs/ufs Fix wrong assertion, the negatiopn of "a && b" i...

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

details:   https://anonhg.NetBSD.org/src/rev/79ccee436e46
branches:  trunk
changeset: 361987:79ccee436e46
user:      hannken <hannken%NetBSD.org@localhost>
date:      Mon Feb 21 17:07:45 2022 +0000

description:
Fix wrong assertion, the negatiopn of "a && b" is "!a || !b" so we
need "DIP(ip, blocks) != 0" here.

Should fix PR kern/56725 (Panic when ls directory with device nodes
on an older ffs)

diffstat:

 sys/ufs/ufs/ufs_readwrite.c |  6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diffs (27 lines):

diff -r 4460f869865c -r 79ccee436e46 sys/ufs/ufs/ufs_readwrite.c
--- a/sys/ufs/ufs/ufs_readwrite.c       Mon Feb 21 08:15:05 2022 +0000
+++ b/sys/ufs/ufs/ufs_readwrite.c       Mon Feb 21 17:07:45 2022 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: ufs_readwrite.c,v 1.127 2021/10/20 03:08:19 thorpej Exp $      */
+/*     $NetBSD: ufs_readwrite.c,v 1.128 2022/02/21 17:07:45 hannken Exp $      */
 
 /*-
  * Copyright (c) 1993
@@ -32,7 +32,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(1, "$NetBSD: ufs_readwrite.c,v 1.127 2021/10/20 03:08:19 thorpej Exp $");
+__KERNEL_RCSID(1, "$NetBSD: ufs_readwrite.c,v 1.128 2022/02/21 17:07:45 hannken Exp $");
 
 #define        FS                      struct fs
 #define        I_FS                    i_fs
@@ -142,7 +142,7 @@
 
        KASSERT(vp->v_type != VLNK || ip->i_size >= ump->um_maxsymlinklen);
        KASSERT(vp->v_type != VLNK || ump->um_maxsymlinklen != 0 ||
-           DIP(ip, blocks) == 0);
+           DIP(ip, blocks) != 0);
 
        if (uio->uio_offset > ump->um_maxfilesize)
                return EFBIG;