[src/trunk]: src/sys/dev/scsipi Use unsigned to avoid undefined behavior in s...

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

details:   https://anonhg.NetBSD.org/src/rev/0d9ead84900f
branches:  trunk
changeset: 463998:0d9ead84900f
user:      msaitoh <msaitoh%NetBSD.org@localhost>
date:      Thu Sep 19 03:37:31 2019 +0000

description:
Use unsigned to avoid undefined behavior in scsipi_{get,put}_tag().
Found by kUBSan.

diffstat:

 sys/dev/scsipi/scsipi_base.c |  8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)

diffs (36 lines):

diff -r b122cfb1ff1b -r 0d9ead84900f sys/dev/scsipi/scsipi_base.c
--- a/sys/dev/scsipi/scsipi_base.c      Thu Sep 19 01:44:48 2019 +0000
+++ b/sys/dev/scsipi/scsipi_base.c      Thu Sep 19 03:37:31 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: scsipi_base.c,v 1.182 2019/03/28 10:44:29 kardel Exp $ */
+/*     $NetBSD: scsipi_base.c,v 1.183 2019/09/19 03:37:31 msaitoh Exp $        */
 
 /*-
  * Copyright (c) 1998, 1999, 2000, 2002, 2003, 2004 The NetBSD Foundation, Inc.
@@ -31,7 +31,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: scsipi_base.c,v 1.182 2019/03/28 10:44:29 kardel Exp $");
+__KERNEL_RCSID(0, "$NetBSD: scsipi_base.c,v 1.183 2019/09/19 03:37:31 msaitoh Exp $");
 
 #ifdef _KERNEL_OPT
 #include "opt_scsi.h"
@@ -367,7 +367,7 @@
 #endif
 
        bit -= 1;
-       periph->periph_freetags[word] &= ~(1 << bit);
+       periph->periph_freetags[word] &= ~(1U << bit);
        tag = (word << 5) | bit;
 
        /* XXX Should eventually disallow this completely. */
@@ -398,7 +398,7 @@
        word = xs->xs_tag_id >> 5;
        bit = xs->xs_tag_id & 0x1f;
 
-       periph->periph_freetags[word] |= (1 << bit);
+       periph->periph_freetags[word] |= (1U << bit);
 }
 
 /*