The patch titled Subject: mm/damon/sysfs: cleanup attrs subdirs on context dir setup failure has been added to the -mm mm-new branch. Its filename is mm-damon-sysfs-cleanup-attrs-subdirs-on-context-dir-setup-failure.patch
This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches...
This patch will later appear in the mm-new branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------ From: SeongJae Park sj@kernel.org Subject: mm/damon/sysfs: cleanup attrs subdirs on context dir setup failure Date: Wed, 24 Dec 2025 18:30:35 -0800
When a context DAMON sysfs directory setup is failed after setup of attrs/ directory, subdirectories of attrs/ directory are not cleaned up. As a result, DAMON sysfs interface is nearly broken until the system reboots, and the memory for the unremoved directory is leaked.
Cleanup the directories under such failures.
Link: https://lkml.kernel.org/r/20251225023043.18579-3-sj@kernel.org Fixes: c951cd3b8901 ("mm/damon: implement a minimal stub for sysfs-based DAMON interface") Signed-off-by: SeongJae Park sj@kernel.org Cc: chongjiapeng jiapeng.chong@linux.alibaba.com Cc: stable@vger.kernel.org # 5.18.x Signed-off-by: Andrew Morton akpm@linux-foundation.org ---
mm/damon/sysfs.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
--- a/mm/damon/sysfs.c~mm-damon-sysfs-cleanup-attrs-subdirs-on-context-dir-setup-failure +++ a/mm/damon/sysfs.c @@ -950,7 +950,7 @@ static int damon_sysfs_context_add_dirs(
err = damon_sysfs_context_set_targets(context); if (err) - goto put_attrs_out; + goto rmdir_put_attrs_out;
err = damon_sysfs_context_set_schemes(context); if (err) @@ -960,7 +960,8 @@ static int damon_sysfs_context_add_dirs( put_targets_attrs_out: kobject_put(&context->targets->kobj); context->targets = NULL; -put_attrs_out: +rmdir_put_attrs_out: + damon_sysfs_attrs_rm_dirs(context->attrs); kobject_put(&context->attrs->kobj); context->attrs = NULL; return err; _
Patches currently in -mm which might be from sj@kernel.org are
mm-damon-core-remove-call_control-in-inactive-contexts.patch mm-damon-core-introduce-nr_snapshots-damos-stat.patch mm-damon-sysfs-schemes-introduce-nr_snapshots-damos-stat-file.patch docs-mm-damon-design-update-for-nr_snapshots-damos-stat.patch docs-admin-guide-mm-damon-usage-update-for-nr_snapshots-damos-stat.patch docs-abi-damon-update-for-nr_snapshots-damos-stat.patch mm-damon-update-damos-kerneldoc-for-stat-field.patch mm-damon-core-implement-max_nr_snapshots.patch mm-damon-sysfs-schemes-implement-max_nr_snapshots-file.patch docs-mm-damon-design-update-for-max_nr_snapshots.patch docs-admin-guide-mm-damon-usage-update-for-max_nr_snapshots.patch docs-abi-damon-update-for-max_nr_snapshots.patch mm-damon-core-add-trace-point-for-damos-stat-per-apply-interval.patch mm-damon-sysfs-cleanup-intervals-subdirs-on-attrs-dir-setup-failure.patch mm-damon-sysfs-cleanup-attrs-subdirs-on-context-dir-setup-failure.patch mm-damon-sysfs-scheme-cleanup-quotas-subdirs-on-scheme-dir-setup-failure.patch mm-damon-sysfs-scheme-cleanup-access_pattern-subdirs-on-scheme-dir-setup-failure.patch