From 7295a996fdab7bf83dc3d4078fa8b139b8e0a1bf Mon Sep 17 00:00:00 2001
From: Armin Wolf <W_Armin@gmx.de>
Date: Sat, 5 Aug 2023 07:36:10 +0200
Subject: [PATCH] platform/x86: dell-sysman: Fix reference leak
If a duplicate attribute is found using kset_find_obj(),
a reference to that attribute is returned. This means
that we need to dispose it accordingly. Use kobject_put()
to dispose the duplicate attribute in such a case.
Compile-tested only.
Fixes: e8a60aa7404b ("platform/x86: Introduce support for Systems Management Driver over WMI for Dell Systems")
Signed-off-by: Armin Wolf <W_Armin@gmx.de>
Link: https://lore.kernel.org/r/20230805053610.7106-1-W_Armin@gmx.de
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
drivers/platform/x86/dell/dell-wmi-sysman/sysman.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/drivers/platform/x86/dell/dell-wmi-sysman/sysman.c b/drivers/platform/x86/dell/dell-wmi-sysman/sysman.c
index b68dd11cb8924..b929b4f824205 100644
--- a/drivers/platform/x86/dell/dell-wmi-sysman/sysman.c
+++ b/drivers/platform/x86/dell/dell-wmi-sysman/sysman.c
@@ -393,6 +393,7 @@ static int init_bios_attributes(int attr_type, const char *guid)
struct kobject *attr_name_kobj; //individual attribute names
union acpi_object *obj = NULL;
union acpi_object *elements;
+ struct kobject *duplicate;
struct kset *tmp_set;
int min_elements;
@@ -451,9 +452,11 @@ static int init_bios_attributes(int attr_type, const char *guid)
else
tmp_set = wmi_priv.main_dir_kset;
- if (kset_find_obj(tmp_set, elements[ATTR_NAME].string.pointer)) {
- pr_debug("duplicate attribute name found - %s\n",
- elements[ATTR_NAME].string.pointer);
+ duplicate = kset_find_obj(tmp_set, elements[ATTR_NAME].string.pointer);
+ if (duplicate) {
+ pr_debug("Duplicate attribute name found - %s\n",
+ elements[ATTR_NAME].string.pointer);
+ kobject_put(duplicate);
goto nextobj;
}
--
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