From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:57116 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750866AbdH1HSZ (ORCPT ); Mon, 28 Aug 2017 03:18:25 -0400 Subject: Patch "ACPI / APEI: Add missing synchronize_rcu() on NOTIFY_SCI removal" has been added to the 4.9-stable tree To: james.morse@arm.com, gregkh@linuxfoundation.org, rafael.j.wysocki@intel.com, ying.huang@intel.com Cc: , From: Date: Mon, 28 Aug 2017 09:18:31 +0200 Message-ID: <150390471111812@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled ACPI / APEI: Add missing synchronize_rcu() on NOTIFY_SCI removal to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: acpi-apei-add-missing-synchronize_rcu-on-notify_sci-removal.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 7d64f82cceb21e6d95db312d284f5f195e120154 Mon Sep 17 00:00:00 2001 From: James Morse Date: Thu, 16 Mar 2017 14:30:39 +0000 Subject: ACPI / APEI: Add missing synchronize_rcu() on NOTIFY_SCI removal From: James Morse commit 7d64f82cceb21e6d95db312d284f5f195e120154 upstream. When removing a GHES device notified by SCI, list_del_rcu() is used, ghes_remove() should call synchronize_rcu() before it goes on to call kfree(ghes), otherwise concurrent RCU readers may still hold this list entry after it has been freed. Signed-off-by: James Morse Reviewed-by: "Huang, Ying" Fixes: 81e88fdc432a (ACPI, APEI, Generic Hardware Error Source POLL/IRQ/NMI notification type support) Signed-off-by: Rafael J. Wysocki Signed-off-by: Greg Kroah-Hartman --- drivers/acpi/apei/ghes.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/acpi/apei/ghes.c +++ b/drivers/acpi/apei/ghes.c @@ -1072,6 +1072,7 @@ static int ghes_remove(struct platform_d if (list_empty(&ghes_sci)) unregister_acpi_hed_notifier(&ghes_notifier_sci); mutex_unlock(&ghes_list_mutex); + synchronize_rcu(); break; case ACPI_HEST_NOTIFY_NMI: ghes_nmi_remove(ghes); Patches currently in stable-queue which might be from james.morse@arm.com are queue-4.9/acpi-apei-add-missing-synchronize_rcu-on-notify_sci-removal.patch