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=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no 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 0EDE1C4332D for ; Wed, 18 Mar 2020 22:09:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E078C20752 for ; Wed, 18 Mar 2020 22:09:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727306AbgCRWJY (ORCPT ); Wed, 18 Mar 2020 18:09:24 -0400 Received: from imap2.colo.codethink.co.uk ([78.40.148.184]:32780 "EHLO imap2.colo.codethink.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726619AbgCRWJY (ORCPT ); Wed, 18 Mar 2020 18:09:24 -0400 Received: from shadbolt.e.decadent.org.uk ([88.96.1.126] helo=xylophone) by imap2.colo.codethink.co.uk with esmtpsa (Exim 4.92 #3 (Debian)) id 1jEgsL-0003I5-Qt; Wed, 18 Mar 2020 22:09:22 +0000 Message-ID: <2082b1e11fdbf3b64f0da022fb15a8b615c3678c.camel@codethink.co.uk> Subject: [stable] locks: fix a potential use-after-free problem when wakeup a waiter From: Ben Hutchings To: Greg Kroah-Hartman , Sasha Levin Cc: stable Date: Wed, 18 Mar 2020 22:09:20 +0000 Organization: Codethink Ltd. Content-Type: text/plain; charset="UTF-8" User-Agent: Evolution 3.30.5-1.1 MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org This commit (included in 5.6-rc5) seems to be needed for 5.4 and 5.5 branches: commit 6d390e4b5d48ec03bb87e63cf0a2bff5f4e116da Author: yangerkun Date: Wed Mar 4 15:25:56 2020 +0800 locks: fix a potential use-after-free problem when wakeup a waiter I'm a bit surprised that it hasn't yet been applied, while some fixes from 5.6-rc6 have. Ben. -- Ben Hutchings, Software Developer Codethink Ltd https://www.codethink.co.uk/ Dale House, 35 Dale Street Manchester, M1 2HF, United Kingdom