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From: SJ Park <sj@kernel.org>
To: Sasha Levin <sashal@kernel.org>
Cc: SJ Park <sj@kernel.org>,
	stable@vger.kernel.org,
	damon@lists.linux.dev,
	Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCH 6.18.y] mm/damon/core: avoid infinite kdamond_merge_regions() internal loop
Date: Fri, 11 Sep 2026 06:50:02 -0700
Message-ID: <20260911135003.96395-1-sj@kernel.org>
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On Fri, 11 Sep 2026 07:20:56 -0400 Sasha Levin <sashal@kernel.org> wrote:

> > Sashiko found a few issues in DAMON that could cause infinite loop,
> > NULL dereference and monitoring results degradation.
> 
> Holding this on all five branches for now. 6.18.y is newer than 6.12.y, 6.6.y,
> 6.1.y, and 5.15.y, and it needs a fix here first, but the patch you sent for
> 6.18.y does not apply: 6.18.y has since grown a count_age parameter
> through the same lines this patch touches.
> 
> Could you send an updated 6.18.y version rebased against the current count_age
> code?

Sure!  I just sent [1] it.

[1] https://lore.kernel.org/20260911134904.96369-1-sj@kernel.org

> Once that lands, the other four branches are ready to go.

Cool, let me know if there is anything that I can help!


Thanks,
SJ

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