From 335770ac08648d57ca6d1b9b1ca0fb7047ae8e42 Mon Sep 17 00:00:00 2001
From: Alex Richardson <arichardson@FreeBSD.org>
Date: Mon, 21 Sep 2020 19:03:17 +0000
Subject: [PATCH] mkcsmapper: Fix UBSan signed shift error

usr.bin/mkcsmapper/yacc.y:466:18: runtime error: left shift of 1 by 31 places cannot be represented in type 'int'
---
 usr.bin/mkcsmapper/yacc.y | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/usr.bin/mkcsmapper/yacc.y b/usr.bin/mkcsmapper/yacc.y
index fc43ea80da0f..8d67be70beec 100644
--- a/usr.bin/mkcsmapper/yacc.y
+++ b/usr.bin/mkcsmapper/yacc.y
@@ -463,7 +463,7 @@ set_src_zone(u_int32_t val)
 	default: 
 		goto bad;
 	}
-	rowcol_mask = 1 << (rowcol_bits - 1);
+	rowcol_mask = 1u << (rowcol_bits - 1);
 	rowcol_mask |= rowcol_mask - 1;
 	for (i = 0; i < rowcol_len; ++i) {
 		p = &rowcol[i];