Commit 170d6f99 authored by Gao feng's avatar Gao feng Committed by David S. Miller
Browse files

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: default avatarGao feng <>
Signed-off-by: default avatarDavid S. Miller <>
parent cf89d6b2
......@@ -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;
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