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| author | Gao feng <gaofeng@cn.fujitsu.com> | 2013-06-20 10:01:34 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-06-19 21:13:24 -0700 |
| commit | dc25c676f54addb10e598daa9da9b8dd4fd487ab (patch) | |
| tree | ec051c49410942a463d23fc9583a649851c8bff5 | |
| parent | 170d6f99541600ec7512f1d2b0b0c349009098d2 (diff) | |
| download | lwn-dc25c676f54addb10e598daa9da9b8dd4fd487ab.tar.gz lwn-dc25c676f54addb10e598daa9da9b8dd4fd487ab.zip | |
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.c | 6 |
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]); |