net/ipv4: replace simple_strtoul with kstrtoul

Replace simple_strtoul with kstrtoul in three similar occurrences, all setup
handlers:
* route.c: set_rhash_entries
* tcp.c: set_thash_entries
* udp.c: set_uhash_entries

Also check if the conversion failed.

Signed-off-by: Eldad Zack <eldad@fogrefinery.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 21 insertions, 3 deletions

diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index 76e5880cdb07..ffcb3b016843 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 63ddaee7209f..e13546ca9923 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 279fd0846302..609397ee78fb 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;