6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: SeongJae Park <sj@xxxxxxxxxx> commit 582ccf78f6090d88b1c7066b1e90b3d9ec952d08 upstream. damon_nr_regions.py starts DAMON, periodically collect number of regions in snapshots, and see if it is in the requested range. The check code assumes the numbers are sorted on the collection list, but there is no such guarantee. Hence this can result in false positive test success. Sort the list before doing the check. Link: https://lkml.kernel.org/r/20250225222333.505646-4-sj@xxxxxxxxxx Fixes: 781497347d1b ("selftests/damon: implement test for min/max_nr_regions") Signed-off-by: SeongJae Park <sj@xxxxxxxxxx> Cc: Shuah Khan <shuah@xxxxxxxxxx> Cc: <stable@xxxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- tools/testing/selftests/damon/damon_nr_regions.py | 1 + 1 file changed, 1 insertion(+) --- a/tools/testing/selftests/damon/damon_nr_regions.py +++ b/tools/testing/selftests/damon/damon_nr_regions.py @@ -65,6 +65,7 @@ def test_nr_regions(real_nr_regions, min test_name = 'nr_regions test with %d/%d/%d real/min/max nr_regions' % ( real_nr_regions, min_nr_regions, max_nr_regions) + collected_nr_regions.sort() if (collected_nr_regions[0] < min_nr_regions or collected_nr_regions[-1] > max_nr_regions): print('fail %s' % test_name)
