From: Roy Marples <roy@marples.name>
Date: Wed, 16 Oct 2019 13:48:01 +0000 (+0100)
Subject: compat: Fix UB in arc4random.
X-Git-Tag: v8.1.1~3
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0209dbe976b27ba88840406685bbf1ceca2c5e8f;p=thirdparty%2Fdhcpcd.git

compat: Fix UB in arc4random.
---

diff --git a/compat/arc4random.c b/compat/arc4random.c
index ab06df04..045e0234 100644
--- a/compat/arc4random.c
+++ b/compat/arc4random.c
@@ -90,7 +90,7 @@ arc4_getword(struct arc4_stream *as)
 {
 	int val;
 
-	val = arc4_getbyte(as) << 24;
+	val = (int)((unsigned int)arc4_getbyte(as) << 24);
 	val |= arc4_getbyte(as) << 16;
 	val |= arc4_getbyte(as) << 8;
 	val |= arc4_getbyte(as);