netfilter: Fixed null pointer dereference

This file needs to be patched because of a bug introduced by Google. After you run any container, a seg fault will be generated due to a null pointer dereference and your phone will freeze and reboot. If you work at Google or know someone who does, warn him/her about it.

Signed-off-by: Cyber Knight <cyberknight755@gmail.com>

Author: FreddieOliveira

net/netfilter/xt_qtaguid.c

@@ -739,21 +739,15 @@ static int iface_stat_fmt_proc_show(struct seq_file *m, void *v)
 {
 	struct proc_iface_stat_fmt_info *p = m->private;
 	struct iface_stat *iface_entry;
-	struct rtnl_link_stats64 dev_stats, *stats;
+	struct rtnl_link_stats64 *stats;
 	struct rtnl_link_stats64 no_dev_stats = {0};
 
 
 	CT_DEBUG("qtaguid:proc iface_stat_fmt pid=%u tgid=%u uid=%u\n",
 		 current->pid, current->tgid, from_kuid(&init_user_ns, current_fsuid()));
 
 	iface_entry = list_entry(v, struct iface_stat, list);
-
-	if (iface_entry->active) {
-		stats = dev_get_stats(iface_entry->net_dev,
-				      &dev_stats);
-	} else {
-		stats = &no_dev_stats;
-	}
+	stats = &no_dev_stats;
 	/*
 	 * If the meaning of the data changes, then update the fmtX
 	 * string.