[src/trunk]: src/sys/dev/ic Cast to uint32_t to avoid undefined behavior in d...

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

details:   https://anonhg.NetBSD.org/src/rev/06740e4885ee
branches:  trunk
changeset: 1021164:06740e4885ee
user:      msaitoh <msaitoh%NetBSD.org@localhost>
date:      Thu May 13 05:56:39 2021 +0000

description:
Cast to uint32_t to avoid undefined behavior in dwc_gmac_write_hwaddr().
Found by kUBSan.

diffstat:

 sys/dev/ic/dwc_gmac.c |  6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diffs (27 lines):

diff -r 53d34b9bdd80 -r 06740e4885ee sys/dev/ic/dwc_gmac.c
--- a/sys/dev/ic/dwc_gmac.c     Thu May 13 05:54:14 2021 +0000
+++ b/sys/dev/ic/dwc_gmac.c     Thu May 13 05:56:39 2021 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: dwc_gmac.c,v 1.72 2020/12/31 15:09:12 ryo Exp $ */
+/* $NetBSD: dwc_gmac.c,v 1.73 2021/05/13 05:56:39 msaitoh Exp $ */
 
 /*-
  * Copyright (c) 2013, 2014 The NetBSD Foundation, Inc.
@@ -41,7 +41,7 @@
 
 #include <sys/cdefs.h>
 
-__KERNEL_RCSID(1, "$NetBSD: dwc_gmac.c,v 1.72 2020/12/31 15:09:12 ryo Exp $");
+__KERNEL_RCSID(1, "$NetBSD: dwc_gmac.c,v 1.73 2021/05/13 05:56:39 msaitoh Exp $");
 
 /* #define     DWC_GMAC_DEBUG  1 */
 
@@ -398,7 +398,7 @@
 
        hi = enaddr[4] | (enaddr[5] << 8);
        lo = enaddr[0] | (enaddr[1] << 8) | (enaddr[2] << 16)
-           | (enaddr[3] << 24);
+           | ((uint32_t)enaddr[3] << 24);
        bus_space_write_4(sc->sc_bst, sc->sc_bsh, AWIN_GMAC_MAC_ADDR0HI, hi);
        bus_space_write_4(sc->sc_bst, sc->sc_bsh, AWIN_GMAC_MAC_ADDR0LO, lo);
 }