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From: SJ Park <sj@kernel.org>
To: SJ Park <sj@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
	stable@vger.kernel.org,
	Brendan Higgins <brendan.higgins@linux.dev>,
	David Gow <davidgow@davidgow.net>,
	Fernand Sieber <sieberf@amazon.com>,
	Leonard Foerster <foersleo@amazon.de>,
	Quanmin Yan <yanquanmin1@huawei.com>,
	SeongJae Park <sjpark@amazon.de>,
	Shakeel Butt <shakeel.butt@linux.dev>,
	damon@lists.linux.dev, kunit-dev@googlegroups.com,
	linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org,
	linux-mm@kvack.org
Subject: Re: [PATCH v1.1 0/6] mm/damon: unurgent fixes for infinite loop, NULL de-ref and races
Date: Tue, 14 Jul 2026 20:33:25 -0700	[thread overview]
Message-ID: <20260715033325.109466-1-sj@kernel.org> (raw)
In-Reply-To: <20260715031002.108504-1-sj@kernel.org>

On Tue, 14 Jul 2026 20:09:55 -0700 SJ Park <sj@kernel.org> wrote:

> Sashiko found a few issues in DAMON that could cause infinite loop, NULL
> dereference and monitoring results degradation.  The first two sounds
> scary but the infinite loop happens only under unreasonable user setup.
> The NULL dereference is only in a unit test.  Monitoring results
> degradation is trivial since it is only best-effort, and those happens
> from only unlikely races.  Still those are bugs that better to fix if
> possible. Fix those.

Sashiko found no blocker for this series.  Sashiko sent findings to damon@
mailing list [1], and I replied to all the comments.  Please read those for
details.

[1] https://lore.kernel.org/damon/


Thanks,
SJ

[...]

  parent reply	other threads:[~2026-07-15  3:33 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-07-15  3:09 [PATCH v1.1 0/6] mm/damon: unurgent fixes for infinite loop, NULL de-ref and races SJ Park
2026-07-15  3:09 ` [PATCH v1.1 1/6] mm/damon/core: avoid infinite kdamond_merge_regions() internal loop SJ Park
2026-07-15  3:09 ` [PATCH v1.1 2/6] mm/damon/tests/core-kunit: catch test failure in test_merge_regions_of() SJ Park
2026-07-15  3:09 ` [PATCH v1.1 3/6] mm/damon/vaddr: drop last same folio access check optimization SJ Park
2026-07-15  3:09 ` [PATCH v1.1 4/6] mm/damon/paddr: drop last same folio access check reuse optimization SJ Park
2026-07-15  3:10 ` [PATCH v1.1 5/6] mm/damon/sysfs: read addr_unit only once in damon_sysfs_apply_inputs() SJ Park
2026-07-15  3:10 ` [PATCH v1.1 6/6] mm/damon/sysfs: read ops_id " SJ Park
2026-07-15  3:33 ` SJ Park [this message]
2026-07-15  4:46 ` [PATCH v1.1 0/6] mm/damon: unurgent fixes for infinite loop, NULL de-ref and races Andrew Morton
2026-07-15 13:26   ` SJ Park

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