linux-kernel - [PATCH] ACPI: platform_profile: Fix memory leak in profile_class_is

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Message-ID: <20250212193058.32110-1-kuurtb@gmail.com>
Date: Wed, 12 Feb 2025 14:30:58 -0500
From: Kurt Borja <kuurtb@...il.com>
To: "Rafael J. Wysocki" <rafael@...nel.org>
Cc: Len Brown <lenb@...nel.org>,
	Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
	Mark Pearson <mpearson-lenovo@...ebb.ca>,
	Mario Limonciello <mario.limonciello@....com>,
	Armin Wolf <W_Armin@....de>,
	Kurt Borja <kuurtb@...il.com>,
	Gergo Koteles <soyer@....hu>,
	linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] ACPI: platform_profile: Fix memory leak in profile_class_is_visible()

If class_find_device() finds a device it's reference count is
incremented. Call put_device() to drop this reference before returning.

Fixes: 77be5cacb2c2 ("ACPI: platform_profile: Create class for ACPI platform profile")
Signed-off-by: Kurt Borja <kuurtb@...il.com>
---
 drivers/acpi/platform_profile.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/acpi/platform_profile.c b/drivers/acpi/platform_profile.c
index fc92e43d0fe9..2ad53cc6aae5 100644
--- a/drivers/acpi/platform_profile.c
+++ b/drivers/acpi/platform_profile.c
@@ -417,8 +417,14 @@ static int profile_class_registered(struct device *dev, const void *data)
 
 static umode_t profile_class_is_visible(struct kobject *kobj, struct attribute *attr, int idx)
 {
-	if (!class_find_device(&platform_profile_class, NULL, NULL, profile_class_registered))
+	struct device *dev;
+
+	dev = class_find_device(&platform_profile_class, NULL, NULL, profile_class_registered);
+	if (!dev)
 		return 0;
+
+	put_device(dev);
+
 	return attr->mode;
 }
 

base-commit: 3e3e377dd1f300bbdd230533686ce9c9f4f8a90d
-- 
2.48.1