git.ipfire.org Git - thirdparty/kernel/stable-queue.git/blob

   1 From 7071537159be845a5c4ed5fb7d3db25aa4bd04a3 Mon Sep 17 00:00:00 2001
   2 From: Enze Li <lienze@kylinos.cn>
   3 Date: Tue, 14 Oct 2025 16:42:25 +0800
   4 Subject: mm/damon/core: fix potential memory leak by cleaning ops_filter in damon_destroy_scheme
   5
   6 From: Enze Li <lienze@kylinos.cn>
   7
   8 commit 7071537159be845a5c4ed5fb7d3db25aa4bd04a3 upstream.
   9
  10 Currently, damon_destroy_scheme() only cleans up the filter list but
  11 leaves ops_filter untouched, which could lead to memory leaks when a
  12 scheme is destroyed.
  13
  14 This patch ensures both filter and ops_filter are properly freed in
  15 damon_destroy_scheme(), preventing potential memory leaks.
  16
  17 Link: https://lkml.kernel.org/r/20251014084225.313313-1-lienze@kylinos.cn
  18 Fixes: ab82e57981d0 ("mm/damon/core: introduce damos->ops_filters")
  19 Signed-off-by: Enze Li <lienze@kylinos.cn>
  20 Reviewed-by: SeongJae Park <sj@kernel.org>
  21 Tested-by: SeongJae Park <sj@kernel.org>
  22 Cc: <stable@vger.kernel.org>
  23 Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
  24 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  25 ---
  26  mm/damon/core.c |    3 +++
  27  1 file changed, 3 insertions(+)
  28
  29 --- a/mm/damon/core.c
  30 +++ b/mm/damon/core.c
  31 @@ -451,6 +451,9 @@ void damon_destroy_scheme(struct damos *
  32         damos_for_each_filter_safe(f, next, s)
  33                 damos_destroy_filter(f);
  34
  35 +       damos_for_each_ops_filter_safe(f, next, s)
  36 +               damos_destroy_filter(f);
  37 +
  38         kfree(s->migrate_dests.node_id_arr);
  39         kfree(s->migrate_dests.weight_arr);
  40         damon_del_scheme(s);