tcp: sysctl interface leaks 16 bytes of kernel memory

[pandora-kernel.git] / net / ipv4 / sysctl_net_ipv4.c

diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c
index 9205e49..63d4ecc 100644 (file)
--- a/net/ipv4/sysctl_net_ipv4.c
+++ b/net/ipv4/sysctl_net_ipv4.c
@@ -248,6 +248,8 @@ int proc_tcp_fastopen_key(ctl_table *ctl, int write, void __user *buffer,
        ctxt = rcu_dereference(tcp_fastopen_ctx);
        if (ctxt)
                memcpy(user_key, ctxt->key, TCP_FASTOPEN_KEY_LENGTH);
+       else
+               memset(user_key, 0, sizeof(user_key));
        rcu_read_unlock();
 
        snprintf(tbl.data, tbl.maxlen, "%08x-%08x-%08x-%08x",