[NET_SCHED]: Use nla_policy for attribute validation in actions

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 5 insertions, 2 deletions

diff --git a/net/sched/act_simple.c b/net/sched/act_simple.c
index cedaadf18eb2..fbde461b716c 100644
--- a/net/sched/act_simple.c
+++ b/net/sched/act_simple.c
@@ -84,6 +84,10 @@ static int realloc_defdata(struct tcf_defact *d, u32 datalen, void *defdata)
         return alloc_defdata(d, datalen, defdata);
 }
 
+static const struct nla_policy simple_policy[TCA_DEF_MAX + 1] = {
+        [TCA_DEF_PARMS] = { .len = sizeof(struct tc_defact) },
+};
+
 static int tcf_simp_init(struct nlattr *nla, struct nlattr *est,
                          struct tc_action *a, int ovr, int bind)
 {
@@ -102,8 +106,7 @@ static int tcf_simp_init(struct nlattr *nla, struct nlattr *est,
         if (err < 0)
                 return err;
 
-        if (tb[TCA_DEF_PARMS] == NULL ||
-            nla_len(tb[TCA_DEF_PARMS]) < sizeof(*parm))
+        if (tb[TCA_DEF_PARMS] == NULL)
                 return -EINVAL;
 
         parm = nla_data(tb[TCA_DEF_PARMS]);