linux-kernel - [PATCH 0/2] mm/damon: fix memory leak in memcg

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Message-Id: <20250619183608.6647-1-sj@kernel.org>
Date: Thu, 19 Jun 2025 11:36:06 -0700
From: SeongJae Park <sj@...nel.org>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: SeongJae Park <sj@...nel.org>, Shuah Khan <shuah@...nel.org>,
	damon@...ts.linux.dev, kernel-team@...a.com,
	linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org,
	linux-mm@...ck.org, stable@...r.kernel.org, #@....codeaurora.org,
	6.3.x@....codeaurora.org
Subject: [PATCH 0/2] mm/damon: fix memory leak in memcg_path sysfs file

Users can leak memory by repeatedly writing a string to DAMOS sysfs
memcg_path file.  Fix it (patch 1) and add a selftest (patch 2) to avoid
reoccurrance of the bug.

SeongJae Park (2):
  mm/damon/sysfs-schemes: free old damon_sysfs_scheme_filter->memcg_path
    on write
  selftets/damon: add a test for memcg_path leak

 mm/damon/sysfs-schemes.c                      |  1 +
 tools/testing/selftests/damon/Makefile        |  1 +
 .../selftests/damon/sysfs_memcg_path_leak.sh  | 43 +++++++++++++++++++
 3 files changed, 45 insertions(+)
 create mode 100755 tools/testing/selftests/damon/sysfs_memcg_path_leak.sh


base-commit: 05b89e828eb4f791f721cbdc65f36e1a8287a9d3
-- 
2.39.5