linux-kernel - [PATCH v3 0/2] platform/x86: Fix reference leaks

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Date:   Mon, 25 Sep 2023 15:28:42 +0200
From:   Armin Wolf <W_Armin@....de>
To:     markpearson@...ovo.com, jorge.lopez2@...com
Cc:     hdegoede@...hat.com, markgross@...nel.org,
        ilpo.jarvinen@...ux.intel.com, platform-driver-x86@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v3 0/2] platform/x86: Fix reference leaks

If a duplicate attribute is found using kset_find_obj(), a reference
to that attribute is returned which needs to be disposed accordingly
using kobject_put(). This issue likely first appeared inside the
dell-wmi-sysman driver, see
commit 7295a996fdab ("platform/x86: dell-sysman: Fix reference leak").
However, it also seems that the bug was copied from this driver into
the think-lmi and hp-bioscfg drivers. Maybe a more abstract
fw_attr_class could prevent such issues in the future by abstracting
away the kobject handling?

Armin Wolf (2):
  platform/x86: think-lmi: Fix reference leak
  platform/x86: hp-bioscfg: Fix reference leak

 drivers/platform/x86/hp/hp-bioscfg/bioscfg.c | 14 ++++++++----
 drivers/platform/x86/think-lmi.c             | 24 ++++++++++++++++----
 2 files changed, 30 insertions(+), 8 deletions(-)

--
2.39.2