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=-3.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT 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 C02AFC2BA19 for ; Tue, 21 Apr 2020 08:54:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A103E206E9 for ; Tue, 21 Apr 2020 08:54:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726935AbgDUIyt (ORCPT ); Tue, 21 Apr 2020 04:54:49 -0400 Received: from mx2.suse.de ([195.135.220.15]:41502 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726600AbgDUIyt (ORCPT ); Tue, 21 Apr 2020 04:54:49 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id CA4F2ACC2; Tue, 21 Apr 2020 08:54:47 +0000 (UTC) Received: by quack2.suse.cz (Postfix, from userid 1000) id 2DE771E0E57; Tue, 21 Apr 2020 10:54:48 +0200 (CEST) From: Jan Kara To: Ted Tso Cc: , , Eric Sandeen , Jan Kara Subject: ext4: Fix use after free issues with journalled data Date: Tue, 21 Apr 2020 10:54:42 +0200 Message-Id: <20200421085445.5731-1-jack@suse.cz> X-Mailer: git-send-email 2.16.4 Sender: linux-ext4-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-ext4@vger.kernel.org Hello, this series of patches fixes possible use-after-free issues resulting from freed inode being still in writeback list. One partner was able to trigger this using fsstress on filesystem on pmem device. The first patch fixes mostly a theoretical issue, the third patch fixes a real issue happening in the wild and leading to kernel crashing. Honza