Commit dc25c676 authored by Gao feng's avatar Gao feng Committed by David S. Miller
Browse files

neigh: disallow un-init_net to change thresh of neigh 



thresh and interval are global resources,
only init net can change them.

Signed-off-by: default avatarGao feng <gaofeng@cn.fujitsu.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 170d6f99

net/core/neighbour.c

+6 −0
Original line number Diff line number Diff line
@@ -2049,6 +2049,12 @@ static int neightbl_set(struct sk_buff *skb, struct nlmsghdr *nlh) 
		}

	}



	err = -ENOENT;

	if ((tb[NDTA_THRESH1] || tb[NDTA_THRESH2] ||

	     tb[NDTA_THRESH3] || tb[NDTA_GC_INTERVAL]) &&

	    !net_eq(net, &init_net))

		goto errout_tbl_lock;



	if (tb[NDTA_THRESH1])

		tbl->gc_thresh1 = nla_get_u32(tb[NDTA_THRESH1]);