[src/trunk]: src - avoid uninitialised memory usage

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

details:   https://anonhg.NetBSD.org/src/rev/d1a0ea7dbc2e
branches:  trunk
changeset: 448494:d1a0ea7dbc2e
user:      mrg <mrg%NetBSD.org@localhost>
date:      Mon Feb 04 04:37:50 2019 +0000

description:
- avoid uninitialised memory usage

diffstat:

 external/mpl/dhcp/dist/server/mdb6.c   |  6 +++---
 lib/libm/src/s_copysignl.c             |  7 +++++--
 sys/compat/linux/common/linux_socket.c |  6 +++---
 3 files changed, 11 insertions(+), 8 deletions(-)

diffs (86 lines):

diff -r c336d89f55d6 -r d1a0ea7dbc2e external/mpl/dhcp/dist/server/mdb6.c
--- a/external/mpl/dhcp/dist/server/mdb6.c      Mon Feb 04 04:36:41 2019 +0000
+++ b/external/mpl/dhcp/dist/server/mdb6.c      Mon Feb 04 04:37:50 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: mdb6.c,v 1.3 2019/01/10 17:41:47 christos Exp $        */
+/*     $NetBSD: mdb6.c,v 1.4 2019/02/04 04:37:50 mrg Exp $     */
 
 /*
  * Copyright (C) 2007-2017 by Internet Systems Consortium, Inc. ("ISC")
@@ -17,7 +17,7 @@
  */
 
 #include <sys/cdefs.h>
-__RCSID("$NetBSD: mdb6.c,v 1.3 2019/01/10 17:41:47 christos Exp $");
+__RCSID("$NetBSD: mdb6.c,v 1.4 2019/02/04 04:37:50 mrg Exp $");
 
 
 /*!
@@ -939,7 +939,7 @@
                 const struct data_string *input) {
        static u_int32_t history[2];
        static u_int32_t counter = 0;
-       unsigned char md[16];
+       unsigned char md[16] = {0};
        unsigned int len;
 
        /*
diff -r c336d89f55d6 -r d1a0ea7dbc2e lib/libm/src/s_copysignl.c
--- a/lib/libm/src/s_copysignl.c        Mon Feb 04 04:36:41 2019 +0000
+++ b/lib/libm/src/s_copysignl.c        Mon Feb 04 04:37:50 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: s_copysignl.c,v 1.5 2015/05/14 19:26:12 joerg Exp $    */
+/*     $NetBSD: s_copysignl.c,v 1.6 2019/02/04 04:37:50 mrg Exp $      */
 
 /*-
  * Copyright (c) 2010 The NetBSD Foundation, Inc.
@@ -26,11 +26,12 @@
  * POSSIBILITY OF SUCH DAMAGE.
  */
 #include <sys/cdefs.h>
-__RCSID("$NetBSD: s_copysignl.c,v 1.5 2015/05/14 19:26:12 joerg Exp $");
+__RCSID("$NetBSD: s_copysignl.c,v 1.6 2019/02/04 04:37:50 mrg Exp $");
 #include "namespace.h"
 
 #include <math.h>
 #include <machine/ieee.h>
+#include <string.h>
 
 #if defined(__HAVE_LONG_DOUBLE) || defined(__HAVE_IBM_LONGDOUBLE)
 
@@ -61,6 +62,8 @@
 {
        union ldbl_u ux, uy;
 
+       memset(&ux, 0, sizeof ux);
+       memset(&uy, 0, sizeof uy);
        ux.ldblu_ld = x;
        uy.ldblu_ld = y;
        ux.ldblu_d[0] = copysign(ux.ldblu_d[0], uy.ldblu_d[0]);
diff -r c336d89f55d6 -r d1a0ea7dbc2e sys/compat/linux/common/linux_socket.c
--- a/sys/compat/linux/common/linux_socket.c    Mon Feb 04 04:36:41 2019 +0000
+++ b/sys/compat/linux/common/linux_socket.c    Mon Feb 04 04:37:50 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: linux_socket.c,v 1.143 2018/11/14 17:51:37 hannken Exp $       */
+/*     $NetBSD: linux_socket.c,v 1.144 2019/02/04 04:37:50 mrg Exp $   */
 
 /*-
  * Copyright (c) 1995, 1998, 2008 The NetBSD Foundation, Inc.
@@ -35,7 +35,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: linux_socket.c,v 1.143 2018/11/14 17:51:37 hannken Exp $");
+__KERNEL_RCSID(0, "$NetBSD: linux_socket.c,v 1.144 2019/02/04 04:37:50 mrg Exp $");
 
 #if defined(_KERNEL_OPT)
 #include "opt_inet.h"
@@ -1829,7 +1829,7 @@
        struct msghdr *msg = &bmsg.msg_hdr;
        int error, s;
        struct mbuf *from, *control;
-       struct timespec ts, now;
+       struct timespec ts = {0}, now;
        struct linux_timespec lts;
        unsigned int vlen, flags, dg;