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selftests/bpf: States pruning checks for scalar vs STACK_MISC
Check that stacksafe() compares spilled scalars with STACK_MISC. The following combinations are explored: - old spill of imprecise scalar is equivalent to cur STACK_{MISC,INVALID} (plus error in unpriv mode); - old spill of precise scalar is not equivalent to cur STACK_MISC; - old STACK_MISC is equivalent to cur scalar; - old STACK_MISC is not equivalent to cur non-scalar. Signed-off-by: Eduard Zingerman <eddyz87@gmail.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20240127175237.526726-7-maxtram95@gmail.com
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Eduard Zingerman
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Andrii Nakryiko
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Feb 2, 2024
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