On 2023/3/5 3:39, SeongJae Park wrote:

damon_pa_mark_accessed_or_deactivate() is accessing a folio via folio_nr_pages() after folio_put() for the folio has invoked. Fix it.

Reviewed-by: Kefeng Wang wangkefeng.wang@huawei.com

Fixes: f70da5ee8fe1 ("mm/damon: convert damon_pa_mark_accessed_or_deactivate() to use folios") Cc: stable@vger.kernel.org # 6.3.x Signed-off-by: SeongJae Park sj@kernel.org

---

mm/damon/paddr.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/damon/paddr.c b/mm/damon/paddr.c index 10f159b315ea..0db724aec5cb 100644 --- a/mm/damon/paddr.c +++ b/mm/damon/paddr.c @@ -277,8 +277,8 @@ static inline unsigned long damon_pa_mark_accessed_or_deactivate( folio_mark_accessed(folio); else folio_deactivate(folio);

• folio_put(folio);
  

  applied += folio_nr_pages(folio);

• folio_put(folio);
  

  } return applied * PAGE_SIZE; }