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| author | SeongJae Park <sj@kernel.org> | 2023-03-04 19:39:48 +0000 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-03-07 17:04:55 -0800 |
| commit | 751688b8be9049f558f86982966ecaa61a9cbedf (patch) | |
| tree | 2076d905cb02d4c1ad079a5f1d0d4532f35b178e /mm/damon/paddr.c | |
| parent | 90410bcf873cf05f54a32183afff0161f44f9715 (diff) | |
| download | linux-751688b8be9049f558f86982966ecaa61a9cbedf.tar.gz | |
mm/damon/paddr: fix folio_size() call after folio_put() in damon_pa_young()
Patch series "mm/damon/paddr: Fix folio-use-after-put bugs".
There are two folio accesses after folio_put() in mm/damon/paddr.c file.
Fix those.
This patch (of 2):
damon_pa_young() is accessing a folio via folio_size() after folio_put()
for the folio has invoked. Fix it.
Link: https://lkml.kernel.org/r/20230304193949.296391-1-sj@kernel.org
Link: https://lkml.kernel.org/r/20230304193949.296391-2-sj@kernel.org
Fixes: 397b0c3a584b ("mm/damon/paddr: remove folio_sz field from damon_pa_access_chk_result")
Signed-off-by: SeongJae Park <sj@kernel.org>
Reviewed-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Vishal Moola (Oracle) <vishal.moola@gmail.com>
Cc: <stable@vger.kernel.org> [6.2.x]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/damon/paddr.c')
| -rw-r--r-- | mm/damon/paddr.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/mm/damon/paddr.c b/mm/damon/paddr.c index 6c655d9b5639..49b267b03305 100644 --- a/mm/damon/paddr.c +++ b/mm/damon/paddr.c @@ -130,7 +130,6 @@ static bool damon_pa_young(unsigned long paddr, unsigned long *folio_sz) accessed = false; else accessed = true; - folio_put(folio); goto out; } @@ -144,10 +143,10 @@ static bool damon_pa_young(unsigned long paddr, unsigned long *folio_sz) if (need_lock) folio_unlock(folio); - folio_put(folio); out: *folio_sz = folio_size(folio); + folio_put(folio); return accessed; } |