selftests/bpf: Test __szk precision with a NULL nullable buffer

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When a nullable buffer is passed as NULL, check_mem_size_reg() is skipped,
so the __szk memory size must be marked precise through the scalar argument
path instead. Exercise this with bpf_dynptr_slice() and a NULL buffer.

Signed-off-by: Amery Hung <ameryhung@gmail.com>
Link: https://lore.kernel.org/bpf/20260801074633.1595644-12-ameryhung@gmail.com
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>

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Amery Hung 2026-08-01 00:46:26 -07:00 • committed by Kumar Kartikeya Dwivedi

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

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

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