This is a note to let you know that I've just added the patch titled
PM: EM: 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-em-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 17930114c5ca5e362f7dfef459deee79af7f55cb
Author: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Date: Thu Feb 2 16:15:15 2023 +0100
PM: EM: fix memory leak with using debugfs_lookup()
[ Upstream commit a0e8c13ccd6a9a636d27353da62c2410c4eca337 ]
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>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/kernel/power/energy_model.c b/kernel/power/energy_model.c
index 97e62469a6b32..1b902f986f91c 100644
--- a/kernel/power/energy_model.c
+++ b/kernel/power/energy_model.c
@@ -85,10 +85,7 @@ static void em_debug_create_pd(struct device *dev)
static void em_debug_remove_pd(struct device *dev)
{
- struct dentry *debug_dir;
-
- debug_dir = debugfs_lookup(dev_name(dev), rootdir);
- debugfs_remove_recursive(debug_dir);
+ debugfs_lookup_and_remove(dev_name(dev), rootdir);
}
static int __init em_debug_init(void)
