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Date: Thu, 2 Feb 2023 16:15:15 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-pm@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
"Rafael J. Wysocki" <rafael@...nel.org>,
Pavel Machek <pavel@....cz>, Len Brown <len.brown@...el.com>,
linux-kernel@...r.kernel.org
Subject: [PATCH] kernel/power/energy_model.c: fix memory leak with using debugfs_lookup()
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.
Cc: "Rafael J. Wysocki" <rafael@...nel.org>
Cc: Pavel Machek <pavel@....cz>
Cc: Len Brown <len.brown@...el.com>
Cc: linux-pm@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
kernel/power/energy_model.c | 5 +----
1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/kernel/power/energy_model.c b/kernel/power/energy_model.c
index f82111837b8d..7b44f5b89fa1 100644
--- a/kernel/power/energy_model.c
+++ b/kernel/power/energy_model.c
@@ -87,10 +87,7 @@ 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)
--
2.39.1
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