bpf: enforce return code for cgroup-bpf programs

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with addition of tnum logic the verifier got smart enough and
we can enforce return codes at program load time.
For now do so for cgroup-bpf program types.

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Alexei Starovoitov 2017-10-02 22:50:23 -07:00 • committed by David S. Miller

parent 468e2f64d2

commit 390ee7e29f

2 changed files with 112 additions and 0 deletions

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40

kernel/bpf/verifier.c

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72

tools/testing/selftests/bpf/test_verifier.c

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