When a DAMOS-scheme DAMON sysfs directory setup fails after setup of quotas/ directory, subdirectories of quotas/ 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.
Fixes: 1b32234ab087 ("mm/damon/sysfs: support DAMOS watermarks") Cc: stable@vger.kernel.org # 5.18.x Signed-off-by: SeongJae Park sj@kernel.org --- mm/damon/sysfs-schemes.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/mm/damon/sysfs-schemes.c b/mm/damon/sysfs-schemes.c index e198234f0763..7f14e0d3e7a0 100644 --- a/mm/damon/sysfs-schemes.c +++ b/mm/damon/sysfs-schemes.c @@ -2199,7 +2199,7 @@ static int damon_sysfs_scheme_add_dirs(struct damon_sysfs_scheme *scheme) goto put_dests_out; err = damon_sysfs_scheme_set_watermarks(scheme); if (err) - goto put_quotas_access_pattern_out; + goto rmdir_put_quotas_access_pattern_out; err = damos_sysfs_set_filter_dirs(scheme); if (err) goto put_watermarks_quotas_access_pattern_out; @@ -2224,7 +2224,8 @@ static int damon_sysfs_scheme_add_dirs(struct damon_sysfs_scheme *scheme) put_watermarks_quotas_access_pattern_out: kobject_put(&scheme->watermarks->kobj); scheme->watermarks = NULL; -put_quotas_access_pattern_out: +rmdir_put_quotas_access_pattern_out: + damon_sysfs_quotas_rm_dirs(scheme->quotas); kobject_put(&scheme->quotas->kobj); scheme->quotas = NULL; put_dests_out: