CVE-2025-39909 (GCVE-0-2025-39909)
Vulnerability from cvelistv5
Published
2025-10-01 07:44
Modified
2025-11-03 17:44
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: mm/damon/lru_sort: avoid divide-by-zero in damon_lru_sort_apply_parameters() Patch series "mm/damon: avoid divide-by-zero in DAMON module's parameters application". DAMON's RECLAIM and LRU_SORT modules perform no validation on user-configured parameters during application, which may lead to division-by-zero errors. Avoid the divide-by-zero by adding validation checks when DAMON modules attempt to apply the parameters. This patch (of 2): During the calculation of 'hot_thres' and 'cold_thres', either 'sample_interval' or 'aggr_interval' is used as the divisor, which may lead to division-by-zero errors. Fix it by directly returning -EINVAL when such a case occurs. Additionally, since 'aggr_interval' is already required to be set no smaller than 'sample_interval' in damon_set_attrs(), only the case where 'sample_interval' is zero needs to be checked.
References
Impacted products
Vendor Product Version
Linux Linux Version: 40e983cca9274e177bd5b9379299b44d9536ac68
Version: 40e983cca9274e177bd5b9379299b44d9536ac68
Version: 40e983cca9274e177bd5b9379299b44d9536ac68
Version: 40e983cca9274e177bd5b9379299b44d9536ac68
Version: 40e983cca9274e177bd5b9379299b44d9536ac68
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