[PATCH v3 0/3] mm/damon/sysfs: fix memory leak and NULL dereference issues

SeongJae Park
2026-03-21T17:54:40Z

DAMON_SYSFS can leak memory under allocation failure, and do NULL
pointer dereference when a privileged user make wrong sequences of
control. Fix those.

Changes from v2
(https://lore.kernel.org/20260320163559.178101-1-objecting@objecting.org)
- Wordsmith second patch commit message.
- Add NULL dereference trigger steps on the commit messages.
- Collect the valid Reviewed-by: from SJ for the second patch.
- Rebased to latest mm-new.
Changes from v1
(https://lore.kernel.org/20260319155742.186627-1-objecting@objecting.org)
- Check kdamond->contexts->nr from damon_sysfs_handle_cmd()
- Collect Reviewed-by: from SJ for the first and the third patch.

Josh Law (3):
mm/damon/sysfs: fix param_ctx leak on damon_sysfs_new_test_ctx()
failure
mm/damon/sysfs: check contexts->nr before accessing contexts_arr[0]
mm/damon/sysfs: check contexts->nr in repeat_call_fn

mm/damon/sysfs.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)

base-commit: 42bc5b563370622d688719aa248a4c861839373a
--
2.47.3