selftests/bpf: Test subprog jit when toggle bpf_jit_harden repeatedly

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When bpf_jit_harden is toggled between 0 and 2, subprog jit may fail
due to inconsistent twice read values of bpf_jit_harden during jit. So
add a test to ensure the problem is fixed.

Signed-off-by: Hou Tao <houtao1@huawei.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20220309123321.2400262-5-houtao1@huawei.com

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Hou Tao 2022-03-09 20:33:21 +08:00 • committed by Alexei Starovoitov

parent d2a3b7c5be

commit ad13baf456

1 changed files with 68 additions and 9 deletions

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tools/testing/selftests/bpf/prog_tests/subprogs.c

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