Alexander Chuprunov ac16c6b604 lib: sbi: sbi_pmu: added checks for ctr_idx in match ...

Previously, in sbi_pmu_ctr_cfg_match() function, ctr_idx was used immediately
after pmu_ctr_find_fw() or pmu_ctr_find_hw() calls. In first case, array index
was (ctr_idx - num_hw_ctrs), in second - ctr_idx. But pmu_ctr_find_fw() and
pmu_ctr_find_hw() functions can return negative value, in which case writing
in arrays with such indexes would corrupt sbi_pmu_hart_state structure.
To avoid this situation, direct ctr_idx value check added.

Signed-off-by: Alexander Chuprunov <alexander.chuprunov@syntacore.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Link: https://lore.kernel.org/r/20250918090706.2217603-4-alexander.chuprunov@syntacore.com
Signed-off-by: Anup Patel <anup@brainfault.org>

2025-10-27 16:59:42 +05:30

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