selftests/bpf: improve unexpected success reporting in test_syctl

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When tests fail because sysctl() unexpectedly succeeds, they print an
inappropriate "Unexpected failure" message and a random errno. Zero
out errno before calling sysctl() and replace the message with
"Unexpected success".

Fixes: 1f5fa9ab6e ("selftests/bpf: Test BPF_CGROUP_SYSCTL")
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

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Ilya Leoshkevich 2019-08-30 13:07:31 +02:00 • committed by Daniel Borkmann

parent 3404ddf234

commit 416c572821

1 changed files with 2 additions and 1 deletions

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tools/testing/selftests/bpf/test_sysctl.c

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