From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CE22663B8 for ; Sun, 17 Sep 2023 20:30:16 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id C355BC433C7; Sun, 17 Sep 2023 20:30:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1694982616; bh=aqBYPpuR4WgpuL4SYatFjh2jKPjDZ0nRhAThDJPXt68=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=1hx/nEmAA+bOBFwaXcSTdmOp5bBF0WbqLXATbVTvJtF+edbAaAmUo72QAruOTPJ+x GVRAzq1CfECt2sKW4Al6B0DTbOj0UxJx+FhqkBIecsbPTkqngxRJQKcSoSdIaABGju Z4xVSUyDQh7WX3y3bvCFwHNkbY7JV3evP8e2jLaE= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Armin Wolf , Hans de Goede , Sasha Levin Subject: [PATCH 5.15 275/511] platform/x86: dell-sysman: Fix reference leak Date: Sun, 17 Sep 2023 21:11:42 +0200 Message-ID: <20230917191120.478981811@linuxfoundation.org> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20230917191113.831992765@linuxfoundation.org> References: <20230917191113.831992765@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Armin Wolf [ Upstream commit 7295a996fdab7bf83dc3d4078fa8b139b8e0a1bf ] 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 Link: https://lore.kernel.org/r/20230805053610.7106-1-W_Armin@gmx.de Reviewed-by: Hans de Goede Signed-off-by: Hans de Goede Signed-off-by: Sasha Levin --- 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 636bdfa83284d..907fde53e95c4 100644 --- a/drivers/platform/x86/dell/dell-wmi-sysman/sysman.c +++ b/drivers/platform/x86/dell/dell-wmi-sysman/sysman.c @@ -396,6 +396,7 @@ 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; @@ -454,9 +455,11 @@ 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; } -- 2.40.1