[src/trunk]: src/sys/kern Don't call strncmp() where the length arg is the si...

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

details:   https://anonhg.NetBSD.org/src/rev/0b31f1f96c9f
branches:  trunk
changeset: 1020248:0b31f1f96c9f
user:      simonb <simonb%NetBSD.org@localhost>
date:      Mon Apr 05 05:47:31 2021 +0000

description:
Don't call strncmp() where the length arg is the size of a pointer
instead of the max string length.  Switch to strcmp() - both strings
are known nul-terminated.

Thanks tnn@ (and clang!).

diffstat:

 sys/kern/subr_hash.c |  7 +++----
 1 files changed, 3 insertions(+), 4 deletions(-)

diffs (28 lines):

diff -r 22e2a1994205 -r 0b31f1f96c9f sys/kern/subr_hash.c
--- a/sys/kern/subr_hash.c      Mon Apr 05 02:17:52 2021 +0000
+++ b/sys/kern/subr_hash.c      Mon Apr 05 05:47:31 2021 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: subr_hash.c,v 1.8 2021/04/01 06:22:09 simonb Exp $     */
+/*     $NetBSD: subr_hash.c,v 1.9 2021/04/05 05:47:31 simonb Exp $     */
 
 /*
  * Copyright (c) 1982, 1986, 1991, 1993
@@ -37,7 +37,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: subr_hash.c,v 1.8 2021/04/01 06:22:09 simonb Exp $");
+__KERNEL_RCSID(0, "$NetBSD: subr_hash.c,v 1.9 2021/04/05 05:47:31 simonb Exp $");
 
 #include <sys/param.h>
 #include <sys/bitops.h>
@@ -222,8 +222,7 @@
        sysctl_unlock();
        rw_enter(&hashstat_lock, RW_READER);
        TAILQ_FOREACH(hash, &hashstat_list, hs_next) {
-               if (query &&
-                   (strncmp(hash->hs_name, queryname, sizeof(hash->hs_name)) != 0)) {
+               if (query && (strcmp(hash->hs_name, queryname) != 0)) {
                        continue;
                }