selftests/bpf: Add some negative tests

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Add a few negative tests for common mistakes with using percpu kptr
including:
  - store to percpu kptr.
  - type mistach in bpf_kptr_xchg arguments.
  - sleepable prog with untrusted arg for bpf_this_cpu_ptr().
  - bpf_percpu_obj_new && bpf_obj_drop, and bpf_obj_new && bpf_percpu_obj_drop
  - struct with ptr for bpf_percpu_obj_new
  - struct with special field (e.g., bpf_spin_lock) for bpf_percpu_obj_new

Signed-off-by: Yonghong Song <yonghong.song@linux.dev>
Link: https://lore.kernel.org/r/20230827152832.2002421-1-yonghong.song@linux.dev
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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Yonghong Song 2023-08-27 08:28:32 -07:00 • committed by Alexei Starovoitov

parent dfae1eeee9

commit 1bd7931728

2 changed files with 171 additions and 0 deletions

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7

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

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164

tools/testing/selftests/bpf/progs/percpu_alloc_fail.c

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