selftests/bpf: Test sched_process_wait nullable argument

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Add a load-time verifier test that dereferences argument 0 of the
sched_process_wait tp_btf program without checking it. The test expects the
nullable-pointer diagnostic, so it is accepted unexpectedly before the fix
and rejected as expected after it.

Add a successful control that checks the argument for NULL before the
dereference. This ensures the nullable marking preserves legitimate access
to the pid when the tracepoint supplies one.

Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Link: https://lore.kernel.org/r/20260903144433.1716731-9-memxor@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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Kumar Kartikeya Dwivedi 2026-09-03 16:44:26 +02:00 • committed by Alexei Starovoitov

parent a453d6e3b8

commit c1992ba73b

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

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