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Diffstat (limited to 'net/sched/act_sample.c')
-rw-r--r--net/sched/act_sample.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/net/sched/act_sample.c b/net/sched/act_sample.c
index 4060b0955c97..0f82d50ea232 100644
--- a/net/sched/act_sample.c
+++ b/net/sched/act_sample.c
@@ -45,8 +45,8 @@ static int tcf_sample_init(struct net *net, struct nlattr *nla,
struct nlattr *tb[TCA_SAMPLE_MAX + 1];
struct psample_group *psample_group;
struct tcf_chain *goto_ch = NULL;
+ u32 psample_group_num, rate;
struct tc_sample *parm;
- u32 psample_group_num;
struct tcf_sample *s;
bool exists = false;
int ret, err;
@@ -85,6 +85,12 @@ static int tcf_sample_init(struct net *net, struct nlattr *nla,
if (err < 0)
goto release_idr;
+ rate = nla_get_u32(tb[TCA_SAMPLE_RATE]);
+ if (!rate) {
+ NL_SET_ERR_MSG(extack, "invalid sample rate");
+ err = -EINVAL;
+ goto put_chain;
+ }
psample_group_num = nla_get_u32(tb[TCA_SAMPLE_PSAMPLE_GROUP]);
psample_group = psample_group_get(net, psample_group_num);
if (!psample_group) {
@@ -96,7 +102,7 @@ static int tcf_sample_init(struct net *net, struct nlattr *nla,
spin_lock_bh(&s->tcf_lock);
goto_ch = tcf_action_set_ctrlact(*a, parm->action, goto_ch);
- s->rate = nla_get_u32(tb[TCA_SAMPLE_RATE]);
+ s->rate = rate;
s->psample_group_num = psample_group_num;
RCU_INIT_POINTER(s->psample_group, psample_group);