From 7a9c1bd409d3522806d492aa573c1cc5384ca620 Mon Sep 17 00:00:00 2001 From: Patrick McHardy Date: Wed, 23 Jan 2008 20:36:45 -0800 Subject: [PATCH] [NET_SCHED]: Use nla_policy for attribute validation in ematches Signed-off-by: Patrick McHardy Signed-off-by: David S. Miller --- net/sched/em_meta.c | 9 ++++++--- net/sched/ematch.c | 11 ++++++----- 2 files changed, 12 insertions(+), 8 deletions(-) diff --git a/net/sched/em_meta.c b/net/sched/em_meta.c index d9f487d813c4..a1e5619b1876 100644 --- a/net/sched/em_meta.c +++ b/net/sched/em_meta.c @@ -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]); diff --git a/net/sched/ematch.c b/net/sched/ematch.c index daa9c4e7e81d..74ff918455a2 100644 --- a/net/sched/ematch.c +++ b/net/sched/ematch.c @@ -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));