net: ipconfig: use strscpy to replace strlcpy

The strlcpy should not be used because it doesn't limit the source
length. Preferred is strscpy.
Signed-off-by: NXueBing Chen <chenxuebing@jari.cn>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/ipv4/ipconfig.c

@@ -1759,15 +1759,15 @@ static int __init ip_auto_config_setup(char *addrs)
 			case 4:
 				if ((dp = strchr(ip, '.'))) {
 					*dp++ = '\0';
-					strlcpy(utsname()->domainname, dp,
+					strscpy(utsname()->domainname, dp,
 						sizeof(utsname()->domainname));
 				}
-				strlcpy(utsname()->nodename, ip,
+				strscpy(utsname()->nodename, ip,
 					sizeof(utsname()->nodename));
 				ic_host_name_set = 1;
 				break;
 			case 5:
-				strlcpy(user_dev_name, ip, sizeof(user_dev_name));
+				strscpy(user_dev_name, ip, sizeof(user_dev_name));
 				break;
 			case 6:
 				if (ic_proto_name(ip) == 0 &&
@@ -1814,7 +1814,7 @@ __setup("nfsaddrs=", nfsaddrs_config_setup);
 
 static int __init vendor_class_identifier_setup(char *addrs)
 {
-	if (strlcpy(vendor_class_identifier, addrs,
+	if (strscpy(vendor_class_identifier, addrs,
 		    sizeof(vendor_class_identifier))
 	    >= sizeof(vendor_class_identifier))
 		pr_warn("DHCP: vendorclass too long, truncated to \"%s\"\n",