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selftests/bpf: add edge case backtracking logic test
Add a dedicated selftests to try to set up conditions to have a state with same first and last instruction index, but it actually is a loop 3->4->1->2->3. This confuses mark_chain_precision() if verifier doesn't take into account jump history. Signed-off-by: Andrii Nakryiko <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Alexei Starovoitov <[email protected]>
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