Lorenz Bauer b5a36b1e1b bpf: respect size hint to BPF_PROG_TEST_RUN if present
Use data_size_out as a size hint when copying test output to user space.
ENOSPC is returned if the output buffer is too small.
Callers which so far did not set data_size_out are not affected.

Signed-off-by: Lorenz Bauer <lmb@cloudflare.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2018-12-04 08:18:13 -08:00
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