netfilter: ip6_tables: fix information leak to userspace

Signed-off-by: NJan Engelhardt <jengelh@medozas.de>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/ipv6/netfilter/ip6_tables.c

@@ -1137,6 +1137,7 @@ static int get_info(struct net *net, void __user *user,
 			private = &tmp;
 		}
 #endif
+		memset(&info, 0, sizeof(info));
 		info.valid_hooks = t->valid_hooks;
 		memcpy(info.hook_entry, private->hook_entry,
 		       sizeof(info.hook_entry));