Commit 170d6f99 authored Jun 20, 2013 by Gao feng Committed by David S. Miller Jun 19, 2013

neigh: only allow init_net to change the default neigh_parms



Though we don't export the /proc/sys/net/ipv[4,6]/neigh/default/
directory to the un-init_net, but we can still use cmd such as
"ip ntable change name arp_cache locktime 129" to change the locktime
of default neigh_parms.

This patch disallows the un-init_net to find out the neigh_table.parms.
So the un-init_net will failed to influence the init_net.

Signed-off-by: Gao feng <gaofeng@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent cf89d6b2

net/core/neighbour.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -1419,7 +1419,7 @@ static inline struct neigh_parms lookup_neigh_parms(struct neigh_table tbl,

		for (p = &tbl->parms; p; p = p->next) {
		if ((p->dev && p->dev->ifindex == ifindex && net_eq(neigh_parms_net(p), net)) \|\|
		(!p->dev && !ifindex))
		(!p->dev && !ifindex && net_eq(net, &init_net)))
		return p;
		}