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Diffstat (limited to 'net/sched/cls_bpf.c')
-rw-r--r--net/sched/cls_bpf.c15
1 files changed, 13 insertions, 2 deletions
diff --git a/net/sched/cls_bpf.c b/net/sched/cls_bpf.c
index 1029923f9e86..5f3ee9e4b5bf 100644
--- a/net/sched/cls_bpf.c
+++ b/net/sched/cls_bpf.c
@@ -180,6 +180,11 @@ static int cls_bpf_modify_existing(struct net *net, struct tcf_proto *tp,
}
bpf_size = bpf_num_ops * sizeof(*bpf_ops);
+ if (bpf_size != nla_len(tb[TCA_BPF_OPS])) {
+ ret = -EINVAL;
+ goto errout;
+ }
+
bpf_ops = kzalloc(bpf_size, GFP_KERNEL);
if (bpf_ops == NULL) {
ret = -ENOMEM;
@@ -215,15 +220,21 @@ static u32 cls_bpf_grab_new_handle(struct tcf_proto *tp,
struct cls_bpf_head *head)
{
unsigned int i = 0x80000000;
+ u32 handle;
do {
if (++head->hgen == 0x7FFFFFFF)
head->hgen = 1;
} while (--i > 0 && cls_bpf_get(tp, head->hgen));
- if (i == 0)
+
+ if (unlikely(i == 0)) {
pr_err("Insufficient number of handles\n");
+ handle = 0;
+ } else {
+ handle = head->hgen;
+ }
- return i;
+ return handle;
}
static int cls_bpf_change(struct net *net, struct sk_buff *in_skb,