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| author | SeongJae Park <sj@kernel.org> | 2025-06-19 11:36:07 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-07-06 11:04:12 +0200 |
| commit | 4a158ac0538dd5695eeaa00aa0720d711f3e4ef1 (patch) | |
| tree | d506d0f64024382be474dc6795cdfb4a28bd786c /tools/perf/scripts/python/exported-sql-viewer.py | |
| parent | 538f32cc4364e1df3d36d4688109bb669397f221 (diff) | |
mm/damon/sysfs-schemes: free old damon_sysfs_scheme_filter->memcg_path on write
commit 4f489fe6afb395dbc79840efa3c05440b760d883 upstream.
memcg_path_store() assigns a newly allocated memory buffer to
filter->memcg_path, without deallocating the previously allocated and
assigned memory buffer. As a result, users can leak kernel memory by
continuously writing a data to memcg_path DAMOS sysfs file. Fix the leak
by deallocating the previously set memory buffer.
Link: https://lkml.kernel.org/r/20250619183608.6647-2-sj@kernel.org
Fixes: 7ee161f18b5d ("mm/damon/sysfs-schemes: implement filter directory")
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Shuah Khan <shuah@kernel.org>
Cc: <stable@vger.kernel.org> [6.3.x]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools/perf/scripts/python/exported-sql-viewer.py')
0 files changed, 0 insertions, 0 deletions