From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id EC3D3C433E0 for ; Sat, 20 Mar 2021 14:35:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C27E76195F for ; Sat, 20 Mar 2021 14:35:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229756AbhCTOfK (ORCPT ); Sat, 20 Mar 2021 10:35:10 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:46507 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229791AbhCTOem (ORCPT ); Sat, 20 Mar 2021 10:34:42 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1616250882; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=JscDOzEjwWKMBq3/f5KJpJLF+2hyMnsW98dOxqNRtkg=; b=iDtubtEWVqY46xhVT5porLPKx/Rf23st9wKDez5z3nZ8cmTbh0FtHc/rQ8vF8dUkzgg+Ni 0GjMCGPbaucfO83lDTxVqV0lcNFvK24AJtUq/tThTocXsI4Q4GUFhQQgovGpjWP6wXArY+ EoL3kQE2ksNZXfn4/bqMxel09FiSluo= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-299-u6Wkycy_MfaxS1w-f_kFNg-1; Sat, 20 Mar 2021 10:34:40 -0400 X-MC-Unique: u6Wkycy_MfaxS1w-f_kFNg-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id A1391100746C; Sat, 20 Mar 2021 14:34:38 +0000 (UTC) Received: from x1.localdomain (ovpn-112-22.ams2.redhat.com [10.36.112.22]) by smtp.corp.redhat.com (Postfix) with ESMTP id 46AB360C04; Sat, 20 Mar 2021 14:34:37 +0000 (UTC) From: Hans de Goede To: Mark Gross , Andy Shevchenko Cc: Hans de Goede , Mario Limonciello , Divya Bharathi , Alexander Naumann , platform-driver-x86@vger.kernel.org Subject: [PATCH 2/7] platform/x86: dell-wmi-sysman: Make it safe to call exit_foo_attributes() multiple times Date: Sat, 20 Mar 2021 15:34:24 +0100 Message-Id: <20210320143429.76047-3-hdegoede@redhat.com> In-Reply-To: <20210320143429.76047-1-hdegoede@redhat.com> References: <20210320143429.76047-1-hdegoede@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Precedence: bulk List-ID: X-Mailing-List: platform-driver-x86@vger.kernel.org During some of the error-exit paths it is possible that release_attributes_data() will get called multiple times, which results in exit_foo_attributes() getting called multiple times. Make it safe to call exit_foo_attributes() multiple times, avoiding double-free()s in this case. Note that release_attributes_data() really should only be called once during error-exit paths. This will be fixed in a separate patch and it is good to have the exit_foo_attributes() functions modified this way regardless. Cc: Divya Bharathi Cc: Mario Limonciello Signed-off-by: Hans de Goede --- drivers/platform/x86/dell/dell-wmi-sysman/enum-attributes.c | 3 +++ drivers/platform/x86/dell/dell-wmi-sysman/int-attributes.c | 3 +++ drivers/platform/x86/dell/dell-wmi-sysman/passobj-attributes.c | 3 +++ drivers/platform/x86/dell/dell-wmi-sysman/string-attributes.c | 3 +++ 4 files changed, 12 insertions(+) diff --git a/drivers/platform/x86/dell/dell-wmi-sysman/enum-attributes.c b/drivers/platform/x86/dell/dell-wmi-sysman/enum-attributes.c index 80f4b7785c6c..091e48c217ed 100644 --- a/drivers/platform/x86/dell/dell-wmi-sysman/enum-attributes.c +++ b/drivers/platform/x86/dell/dell-wmi-sysman/enum-attributes.c @@ -185,5 +185,8 @@ void exit_enum_attributes(void) sysfs_remove_group(wmi_priv.enumeration_data[instance_id].attr_name_kobj, &enumeration_attr_group); } + wmi_priv.enumeration_instances_count = 0; + kfree(wmi_priv.enumeration_data); + wmi_priv.enumeration_data = NULL; } diff --git a/drivers/platform/x86/dell/dell-wmi-sysman/int-attributes.c b/drivers/platform/x86/dell/dell-wmi-sysman/int-attributes.c index 75aedbb733be..8a49ba6e44f9 100644 --- a/drivers/platform/x86/dell/dell-wmi-sysman/int-attributes.c +++ b/drivers/platform/x86/dell/dell-wmi-sysman/int-attributes.c @@ -175,5 +175,8 @@ void exit_int_attributes(void) sysfs_remove_group(wmi_priv.integer_data[instance_id].attr_name_kobj, &integer_attr_group); } + wmi_priv.integer_instances_count = 0; + kfree(wmi_priv.integer_data); + wmi_priv.integer_data = NULL; } diff --git a/drivers/platform/x86/dell/dell-wmi-sysman/passobj-attributes.c b/drivers/platform/x86/dell/dell-wmi-sysman/passobj-attributes.c index 3abcd95477c0..834b3e82ad9f 100644 --- a/drivers/platform/x86/dell/dell-wmi-sysman/passobj-attributes.c +++ b/drivers/platform/x86/dell/dell-wmi-sysman/passobj-attributes.c @@ -183,5 +183,8 @@ void exit_po_attributes(void) sysfs_remove_group(wmi_priv.po_data[instance_id].attr_name_kobj, &po_attr_group); } + wmi_priv.po_instances_count = 0; + kfree(wmi_priv.po_data); + wmi_priv.po_data = NULL; } diff --git a/drivers/platform/x86/dell/dell-wmi-sysman/string-attributes.c b/drivers/platform/x86/dell/dell-wmi-sysman/string-attributes.c index ac75dce88a4c..552537852459 100644 --- a/drivers/platform/x86/dell/dell-wmi-sysman/string-attributes.c +++ b/drivers/platform/x86/dell/dell-wmi-sysman/string-attributes.c @@ -155,5 +155,8 @@ void exit_str_attributes(void) sysfs_remove_group(wmi_priv.str_data[instance_id].attr_name_kobj, &str_attr_group); } + wmi_priv.str_instances_count = 0; + kfree(wmi_priv.str_data); + wmi_priv.str_data = NULL; } -- 2.30.2