1 files changed, 16 insertions, 0 deletions

diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index f011390f19c9..b7b7278d801c 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -87,6 +87,7 @@
 #include <linux/init.h>
 #include <linux/poll.h>
 #include <linux/netfilter_ipv4.h>
+#include <linux/random.h>
 
 #include <asm/uaccess.h>
 #include <asm/system.h>
@@ -217,6 +218,16 @@ out:
         return err;
 }
 
+u32 inet_ehash_secret;
+EXPORT_SYMBOL(inet_ehash_secret);
+
+void build_ehash_secret(void)
+{
+        while (!inet_ehash_secret)
+                get_random_bytes(&inet_ehash_secret, 4);
+}
+EXPORT_SYMBOL(build_ehash_secret);
+
 /*
  *      Create an inet socket.
  */
@@ -233,6 +244,11 @@ static int inet_create(struct socket *sock, int protocol)
         int try_loading_module = 0;
         int err;
 
+        if (sock->type != SOCK_RAW &&
+            sock->type != SOCK_DGRAM &&
+            !inet_ehash_secret)
+                build_ehash_secret();
+
         sock->state = SS_UNCONNECTED;
 
         /* Look for the requested type/protocol pair. */