net: act_bpf: fix size mismatch on filter preparation
Similarly as in cls_bpf, also this code needs to reject mismatches.
Reference: http://article.gmane.org/gmane.linux.network/347406
Fixes: d23b8ad8ab
("tc: add BPF based action")
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Acked-by: Jiri Pirko <jiri@resnulli.us>
Acked-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -122,6 +122,9 @@ static int tcf_bpf_init(struct net *net, struct nlattr *nla,
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return -EINVAL;
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bpf_size = bpf_num_ops * sizeof(*bpf_ops);
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if (bpf_size != nla_len(tb[TCA_ACT_BPF_OPS]))
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return -EINVAL;
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bpf_ops = kzalloc(bpf_size, GFP_KERNEL);
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if (!bpf_ops)
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return -ENOMEM;
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