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[NET_SCHED]: Use nla_policy for attribute validation in ematches 

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Patrick McHardy 2008-01-23 20:36:45 -08:00 committed by David S. Miller
parent 53b2bf3f8a
commit 7a9c1bd409
2 changed files with 12 additions and 8 deletions
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9
net/sched/em_meta.c
View File

@ -745,6 +745,10 @@ static inline int meta_is_supported(struct meta_value *val)
return (!meta_id(val) || meta_ops(val)->get);
}
static const struct nla_policy meta_policy[TCA_EM_META_MAX + 1] = {
[TCA_EM_META_HDR] = { .len = sizeof(struct tcf_meta_hdr) },
};
static int em_meta_change(struct tcf_proto *tp, void *data, int len,
struct tcf_ematch *m)
{
@ -753,13 +757,12 @@ static int em_meta_change(struct tcf_proto *tp, void *data, int len,
struct tcf_meta_hdr *hdr;
struct meta_match *meta = NULL;
err = nla_parse(tb, TCA_EM_META_MAX, data, len, NULL);
err = nla_parse(tb, TCA_EM_META_MAX, data, len, meta_policy);
if (err < 0)
goto errout;
err = -EINVAL;
if (tb[TCA_EM_META_HDR] == NULL ||
nla_len(tb[TCA_EM_META_HDR]) < sizeof(*hdr))
if (tb[TCA_EM_META_HDR] == NULL)
goto errout;
hdr = nla_data(tb[TCA_EM_META_HDR]);

11
net/sched/ematch.c
View File

@ -282,6 +282,11 @@ errout:
return err;
}
static const struct nla_policy em_policy[TCA_EMATCH_TREE_MAX + 1] = {
[TCA_EMATCH_TREE_HDR] = { .len = sizeof(struct tcf_ematch_tree_hdr) },
[TCA_EMATCH_TREE_LIST] = { .type = NLA_NESTED },
};
/**
* tcf_em_tree_validate - validate ematch config TLV and build ematch tree
*
@ -312,7 +317,7 @@ int tcf_em_tree_validate(struct tcf_proto *tp, struct nlattr *nla,
return 0;
}
err = nla_parse_nested(tb, TCA_EMATCH_TREE_MAX, nla, NULL);
err = nla_parse_nested(tb, TCA_EMATCH_TREE_MAX, nla, em_policy);
if (err < 0)
goto errout;
@ -323,10 +328,6 @@ int tcf_em_tree_validate(struct tcf_proto *tp, struct nlattr *nla,
if (rt_hdr == NULL || rt_list == NULL)
goto errout;
if (nla_len(rt_hdr) < sizeof(*tree_hdr) ||
nla_len(rt_list) < sizeof(*rt_match))
goto errout;
tree_hdr = nla_data(rt_hdr);
memcpy(&tree->hdr, tree_hdr, sizeof(*tree_hdr));