From ef1311b7a4cd65756356ea49c199234f1cb7148b Mon Sep 17 00:00:00 2001
From: Serge Gautherie <32623169+SergeGautherie@users.noreply.github.com>
Date: Sat, 25 Jun 2022 17:14:03 +0200
Subject: [PATCH] [IP] AddrCountPrefixBits(): Fix loop condition (#4556)

Properly handle BitTest reaching 0.

CORE-18225
---
 sdk/lib/drivers/ip/network/address.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sdk/lib/drivers/ip/network/address.c b/sdk/lib/drivers/ip/network/address.c
index 6ddbfd97e6d..27906f62e98 100644
--- a/sdk/lib/drivers/ip/network/address.c
+++ b/sdk/lib/drivers/ip/network/address.c
@@ -71,7 +71,7 @@ UINT AddrCountPrefixBits( PIP_ADDRESS Netmask ) {
 
 	ULONG TestMask = IPv4NToHl(Netmask->Address.IPv4Address);
 
-	while( (BitTest & TestMask) == BitTest ) {
+	while ((BitTest & TestMask) != 0) {
 	    Prefix++;
 	    BitTest >>= 1;
 	}