[NET_SCHED]: Use nla_policy for attribute validation in classifiers
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sched/cls_u32.c b/net/sched/cls_u32.c
index a4e72e8..e8a7756 100644
--- a/net/sched/cls_u32.c
+++ b/net/sched/cls_u32.c
@@ -460,6 +460,16 @@
return handle|(i>0xFFF ? 0xFFF : i);
}
+static const struct nla_policy u32_policy[TCA_U32_MAX + 1] = {
+ [TCA_U32_CLASSID] = { .type = NLA_U32 },
+ [TCA_U32_HASH] = { .type = NLA_U32 },
+ [TCA_U32_LINK] = { .type = NLA_U32 },
+ [TCA_U32_DIVISOR] = { .type = NLA_U32 },
+ [TCA_U32_SEL] = { .len = sizeof(struct tc_u32_sel) },
+ [TCA_U32_INDEV] = { .type = NLA_STRING, .len = IFNAMSIZ },
+ [TCA_U32_MARK] = { .len = sizeof(struct tc_u32_mark) },
+};
+
static int u32_set_parms(struct tcf_proto *tp, unsigned long base,
struct tc_u_hnode *ht,
struct tc_u_knode *n, struct nlattr **tb,
@@ -531,7 +541,7 @@
if (opt == NULL)
return handle ? -EINVAL : 0;
- err = nla_parse_nested(tb, TCA_U32_MAX, opt, NULL);
+ err = nla_parse_nested(tb, TCA_U32_MAX, opt, u32_policy);
if (err < 0)
return err;
@@ -593,8 +603,7 @@
} else
handle = gen_new_kid(ht, htid);
- if (tb[TCA_U32_SEL] == NULL ||
- nla_len(tb[TCA_U32_SEL]) < sizeof(struct tc_u32_sel))
+ if (tb[TCA_U32_SEL] == NULL)
return -EINVAL;
s = nla_data(tb[TCA_U32_SEL]);
@@ -620,13 +629,6 @@
if (tb[TCA_U32_MARK]) {
struct tc_u32_mark *mark;
- if (nla_len(tb[TCA_U32_MARK]) < sizeof(struct tc_u32_mark)) {
-#ifdef CONFIG_CLS_U32_PERF
- kfree(n->pf);
-#endif
- kfree(n);
- return -EINVAL;
- }
mark = nla_data(tb[TCA_U32_MARK]);
memcpy(&n->mark, mark, sizeof(struct tc_u32_mark));
n->mark.success = 0;