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d97cc8fc99
Add test cases for clear_stack_for_all_offs and dst_is_local_fp handling of multi-offset and ARG_IMPRECISE stack pointers: - st_imm_join_with_multi_off: BPF_ST through multi-offset dst should join at_stack with none instead of overwriting both candidate slots. - st_imm_join_with_imprecise_off: BPF_ST through offset-imprecise dst should join at_stack with none instead of clearing all slots. - st_imm_join_with_single_off: a canary checking that BPF_ST with a known offset overwrites slot instead of joining. - imprecise_dst_spill_join: BPF_STX through ARG_IMPRECISE dst should be recognized as a local spill and join at_stack with the written value. Signed-off-by: Eduard Zingerman <eddyz87@gmail.com> Link: https://lore.kernel.org/r/20260413-stacklive-fixes-v2-2-398e126e5cf3@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>