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=-2.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 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 78E4CFA3728 for ; Thu, 17 Oct 2019 01:48:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4FF3221D7C for ; Thu, 17 Oct 2019 01:48:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1571276881; bh=Bj6PbMkOEWn9QUa6k3iFedlOuXbKcM5250I2nBSp67o=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=aMGaBWXGUnrmH7sKQCypgBzJGU8eBuyFsk7NWvOjEjNuQDgUSkqykVaoEJCX7AL8Z 11Uu+PQftkx4cN84lShVaLfdeHucEEDM5DPqj+OLY2zL/aDlXS8mH48A/jNiy2P0pZ zzIKdvTieRO/ZPHCcNVV0rh2RL3ik/0qoosAAlCQ= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390139AbfJQBr5 (ORCPT ); Wed, 16 Oct 2019 21:47:57 -0400 Received: from mail.kernel.org ([198.145.29.99]:44628 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727387AbfJQBr5 (ORCPT ); Wed, 16 Oct 2019 21:47:57 -0400 Received: from sol.localdomain (c-24-5-143-220.hsd1.ca.comcast.net [24.5.143.220]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 8CF0820854; Thu, 17 Oct 2019 01:47:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1571276876; bh=Bj6PbMkOEWn9QUa6k3iFedlOuXbKcM5250I2nBSp67o=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=ir7ngdOqhiJz3NTtmaOmn3xa+J2uzoKwXIbPUViyXiqku47l7kGoSZOx9UeyBqIZc I9cfE2AD0W7O+4DNVAzlMaPasxXt0H8QUYSw8tgIN3Yu4t4Jvxi9PP/QBFFYzxQ2Wd tWJdXqurmSnpZN0QJxyfssuwP6g98d7J08OT6VQo= Date: Wed, 16 Oct 2019 18:47:55 -0700 From: Eric Biggers To: syzbot Cc: akpm@osdl.org, deepa.kernel@gmail.com, hch@infradead.org, jlayton@kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, lkundrak@v3.sk, syzkaller-bugs@googlegroups.com, tklauser@nuerscht.ch, trond.myklebust@fys.uio.no, viro@zeniv.linux.org.uk Subject: Re: KASAN: use-after-free Read in mnt_warn_timestamp_expiry Message-ID: <20191017014755.GA1552@sol.localdomain> Mail-Followup-To: syzbot , akpm@osdl.org, deepa.kernel@gmail.com, hch@infradead.org, jlayton@kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, lkundrak@v3.sk, syzkaller-bugs@googlegroups.com, tklauser@nuerscht.ch, trond.myklebust@fys.uio.no, viro@zeniv.linux.org.uk References: <0000000000007f489b0595115374@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <0000000000007f489b0595115374@google.com> User-Agent: Mutt/1.12.2 (2019-09-21) Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org On Wed, Oct 16, 2019 at 06:42:11PM -0700, syzbot wrote: > ================================================================== > BUG: KASAN: use-after-free in mnt_warn_timestamp_expiry+0x4a/0x250 > fs/namespace.c:2471 > Read of size 8 at addr ffff888099937328 by task syz-executor.1/18510 > Looks like a duplicate of this: #syz dup: KASAN: use-after-free Read in do_mount See the existing thread and proposed fix here: https://lkml.kernel.org/linux-fsdevel/000000000000805e5505945a234b@google.com/T/#u - Eric