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authorGao feng <gaofeng@cn.fujitsu.com>2013-06-20 10:01:34 +0800
committerDavid S. Miller <davem@davemloft.net>2013-06-19 21:13:24 -0700
commitdc25c676f54addb10e598daa9da9b8dd4fd487ab (patch)
treeec051c49410942a463d23fc9583a649851c8bff5
parent170d6f99541600ec7512f1d2b0b0c349009098d2 (diff)
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: Gao feng <gaofeng@cn.fujitsu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/core/neighbour.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/net/core/neighbour.c b/net/core/neighbour.c
index 86f9b165bbba..2569ab2cafbe 100644
--- a/net/core/neighbour.c
+++ b/net/core/neighbour.c
@@ -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]);