[v1] mm/damon/{reclaim,lru_sort}: handle ctx allocation failures

[RFC PATCH 0/2] mm/damon/{reclaim,lru_sort}: handle ctx allocation failures

SeongJae Park posted 2 patches 1 week, 4 days ago

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mm/damon/lru_sort.c | 4 ++++
mm/damon/reclaim.c  | 4 ++++
2 files changed, 8 insertions(+)

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[RFC PATCH 0/2] mm/damon/{reclaim,lru_sort}: handle ctx allocation failures

Posted by SeongJae Park 1 week, 4 days ago

DAMON_RECLAIM and DAMON_LRU_SORT could dereference NULL pointers if
their damon_ctx object allocations fail.  The bug is expected to happen
not frequently,, because the allocation is arguably too small to fail on
common setup.  But theoretically it is possible and the consequence is
bad.  Fix those.

The issue was discovered [1] by Sashiko.

[1] https://lore.kernel.org/20260419014800.877-1-sj@kernel.org

SeongJae Park (2):
  mm/damon/reclaim: handle ctx allocation failure
  mm/damonn/lru_sort: handle ctx allocation failure

 mm/damon/lru_sort.c | 4 ++++
 mm/damon/reclaim.c  | 4 ++++
 2 files changed, 8 insertions(+)


base-commit: 3c18aac8c775b020a2c50e91051f106dc621ad3e
-- 
2.47.3