net: Don't export sysctls to unprivileged users

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / netfilter / nf_conntrack_timestamp.c

diff --git a/net/netfilter/nf_conntrack_timestamp.c b/net/netfilter/nf_conntrack_timestamp.c
index dbb364f62d6f03b593b7b804251f48c2dcf7b845..7ea8026f07c9c843698bb54c68eb236840956bf9 100644 (file)
--- a/net/netfilter/nf_conntrack_timestamp.c
+++ b/net/netfilter/nf_conntrack_timestamp.c
@@ -51,6 +51,10 @@ static int nf_conntrack_tstamp_init_sysctl(struct net *net)
 
        table[0].data = &net->ct.sysctl_tstamp;
 
+       /* Don't export sysctls to unprivileged users */
+       if (net->user_ns != &init_user_ns)
+               table[0].procname = NULL;
+
        net->ct.tstamp_sysctl_header = register_net_sysctl(net, "net/netfilter",
                                                           table);
        if (!net->ct.tstamp_sysctl_header) {