This is a note to let you know that I've just added the patch titled PM: domains: fix memory leak with using debugfs_lookup() to the 5.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: pm-domains-fix-memory-leak-with-using-debugfs_lookup.patch and it can be found in the queue-5.15 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit f8ccad195fce89b906a91ba92d277f39bd4ea391 Author: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> Date: Thu Feb 2 15:15:45 2023 +0100 PM: domains: fix memory leak with using debugfs_lookup() [ Upstream commit 0b6200e1e9f53dabdc30d0f6c51af9a5f664d32b ] When calling debugfs_lookup() the result must have dput() called on it, otherwise the memory will leak over time. To make things simpler, just call debugfs_lookup_and_remove() instead which handles all of the logic at once. Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> Reviewed-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index 94fe30c187ad8..24a82e252b7e1 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -217,13 +217,10 @@ static void genpd_debug_add(struct generic_pm_domain *genpd); static void genpd_debug_remove(struct generic_pm_domain *genpd) { - struct dentry *d; - if (!genpd_debugfs_dir) return; - d = debugfs_lookup(genpd->name, genpd_debugfs_dir); - debugfs_remove(d); + debugfs_lookup_and_remove(genpd->name, genpd_debugfs_dir); } static void genpd_update_accounting(struct generic_pm_domain *genpd)