From: SeongJae Park <sj@kernel.org>
Cc: SeongJae Park <sj@kernel.org>,
"# 6 . 18 . x" <stable@vger.kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
damon@lists.linux.dev, linux-kernel@vger.kernel.org,
linux-mm@kvack.org
Subject: [RFC PATCH 0/2] mm/damon/{reclaim,lru_sort}: handle ctx allocation failures
Date: Wed, 27 May 2026 23:11:07 -0700 [thread overview]
Message-ID: <20260528061110.2172-1-sj@kernel.org> (raw)
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
next reply other threads:[~2026-05-28 6:11 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-28 6:11 SeongJae Park [this message]
2026-05-28 6:11 ` [RFC PATCH 1/2] mm/damon/reclaim: handle ctx allocation failure SeongJae Park
2026-05-28 6:11 ` [RFC PATCH 2/2] mm/damonn/lru_sort: " SeongJae Park
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