diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index 76e5880cdb0748f3fa488f407021aa30d8978bb4..ffcb3b016843ff79976cee50ce6e9f332591c0ac 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -3408,9 +3408,15 @@ struct ip_rt_acct __percpu *ip_rt_acct __read_mostly;
 static __initdata unsigned long rhash_entries;
 static int __init set_rhash_entries(char *str)
 {
+	ssize_t ret;
+
 	if (!str)
 		return 0;
-	rhash_entries = simple_strtoul(str, &str, 0);
+
+	ret = kstrtoul(str, 0, &rhash_entries);
+	if (ret)
+		return 0;
+
 	return 1;
 }
 __setup("rhash_entries=", set_rhash_entries);
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 63ddaee7209f164b1f93baedd48639dcd1ad9c9a..e13546ca9923cc3845d7dbcecc623ce68434e089 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -3462,9 +3462,15 @@ extern struct tcp_congestion_ops tcp_reno;
 static __initdata unsigned long thash_entries;
 static int __init set_thash_entries(char *str)
 {
+	ssize_t ret;
+
 	if (!str)
 		return 0;
-	thash_entries = simple_strtoul(str, &str, 0);
+
+	ret = kstrtoul(str, 0, &thash_entries);
+	if (ret)
+		return 0;
+
 	return 1;
 }
 __setup("thash_entries=", set_thash_entries);
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index 279fd084630223d984b05971457f7c9edc79c610..609397ee78fbd3ec9d16c249a6f023dd6903594f 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -2173,9 +2173,15 @@ void udp4_proc_exit(void)
 static __initdata unsigned long uhash_entries;
 static int __init set_uhash_entries(char *str)
 {
+	ssize_t ret;
+
 	if (!str)
 		return 0;
-	uhash_entries = simple_strtoul(str, &str, 0);
+
+	ret = kstrtoul(str, 0, &uhash_entries);
+	if (ret)
+		return 0;
+
 	if (uhash_entries && uhash_entries < UDP_HTABLE_SIZE_MIN)
 		uhash_entries = UDP_HTABLE_SIZE_MIN;
 	return 1;