Received: by 2002:a05:6a10:22f:0:0:0:0 with SMTP id 15csp1851860pxk; Sat, 26 Sep 2020 07:16:57 -0700 (PDT) X-Google-Smtp-Source: ABdhPJyJyDNN4fV4vA6e7x+QQQCAW/gM3boENNlSafk4MGAN5i9lWwHIDD69i7g0PmuOOqqdTYml X-Received: by 2002:a05:6402:a51:: with SMTP id bt17mr6954425edb.186.1601129817074; Sat, 26 Sep 2020 07:16:57 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1601129817; cv=none; d=google.com; s=arc-20160816; b=RxBZcFhnVrnxP0pO7SP6VuYvfchNjJyi8kmtgMl/iVduup9LPn2uRGyfQ3jbxZLy3r rvG2Oz050v5zezzvmsfjx/hmkz/awpl49canqXhZ2o+FmcG4IJA8IiPSW9mX1H/Vohsn XJMGiqtAamAYvp3jXB8z6kU20uYc/JtbGBq95LLWgOENyazO3QNYxP8JJyl9HiFRtrLo aYbLaonvGTQmE4ax1/EfAvunu8EJSkHLyfRt/OXlJEDzrHKVa/x9exA5tZIcmYU8UTxY G0duJS3B2npSIS5QwdrGfhEtFcm/ylqnic5amY25OZo95+IXVe0b32uzkIkCMp5okqbW tvEw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:to:from:subject:message-id:in-reply-to:date :mime-version; bh=HwmCPWTIkgbEGZ/8XPswh0ymyUWqTxojzs4EteOI0oI=; b=meNgmOqxrusDIoT9MThdedtxTiYsbUM6GEXNI0I5CrooWUqjj+3FtbtWBIO+9l7+fs D0yEpBHfs6bLDWdoxpOSCN3w8Eq5OhNjF1wKTusxz/3zfq4Hdo++hpHVSmIVsjqqE5bP 6Y+m7ost4/z5XLvE3Y7xZsjE3T4Ppy2R/mUDrpUZlW5H8ZqqmznLNgnJx90pEt6mqqJL g3W2N/q9sneMUQ8EUpRfN6vAc58NeqDtwu0pGx9WI6UZQyjg2FAwTpA+mE37wckq1cCw +J2SwxM5eAcYJDE+ZVk433Q2wv6rx7tReMW1v2fQ0RTaJqVxHPD4zGIr18NLvrro9MXk Mo8A== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=appspotmail.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id z9si3858674ejb.479.2020.09.26.07.16.34; Sat, 26 Sep 2020 07:16:57 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=appspotmail.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726309AbgIZOPK (ORCPT + 99 others); Sat, 26 Sep 2020 10:15:10 -0400 Received: from mail-il1-f197.google.com ([209.85.166.197]:50367 "EHLO mail-il1-f197.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726316AbgIZOPK (ORCPT ); Sat, 26 Sep 2020 10:15:10 -0400 Received: by mail-il1-f197.google.com with SMTP id u20so4722783ilk.17 for ; Sat, 26 Sep 2020 07:15:09 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:in-reply-to:message-id:subject :from:to; bh=HwmCPWTIkgbEGZ/8XPswh0ymyUWqTxojzs4EteOI0oI=; b=IFTOxINO2cW9oTl1u8Fm99EJkCATDR9fxFeAIWcYxC5lfSiZQpH2kVXckgf0HoSi7A fl8KCn11F2kgVFEHdAXOpfpqSXEd3q0kg0e6L5AT37qXO3c8T1Sch4l4MJcZgBJQzFY9 6Vmha7pTN/Oo0OKEmZOQF7+t7th0vXAj69X70NRuiIEu9Wycx84PjfUt3s8qUTY3iciP vS1bjOVHP5Uk3cBQvtfbQfv/AgtoM9ctxOR0Bw7RoEVTG4j9l8nNqPl2w1npgtlv5vmu pm9MRB05kbkVFtJ6Tma7ei0lX7/Um10V1vurqXS20kv0/SRwCw4+kFM8Ob2uuR7IRm/o xMQw== X-Gm-Message-State: AOAM531hWQieCmHfHBHEUwhVXjp5Z6s6zFNUoIAjYKOWez4kF7OYjpLh njClnT3CjZ9GIGksYm4mq9jLQ1/EuQK/EtyVL71E5c85WH96 MIME-Version: 1.0 X-Received: by 2002:a5e:8e0a:: with SMTP id a10mr2298570ion.200.1601129709294; Sat, 26 Sep 2020 07:15:09 -0700 (PDT) Date: Sat, 26 Sep 2020 07:15:09 -0700 In-Reply-To: <35306a33-70b5-5e7d-a582-4ba5235953a8@kernel.dk> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000008fddee05b0380f03@google.com> Subject: Re: KASAN: use-after-free Read in io_wqe_worker From: syzbot To: axboe@kernel.dk, io-uring@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot has tested the proposed patch and the reproducer did not trigger any issue: Reported-and-tested-by: syzbot+9af99580130003da82b1@syzkaller.appspotmail.com Tested on: commit: 41d5f92f io-wq: fix worker refcount race git tree: git://git.kernel.dk/linux-block.git kernel config: https://syzkaller.appspot.com/x/.config?x=d31db37354c30905 dashboard link: https://syzkaller.appspot.com/bug?extid=9af99580130003da82b1 compiler: clang version 10.0.0 (https://github.com/llvm/llvm-project/ c2443155a0fb245c8f17f2c1c72b6ea391e86e81) Note: testing is done by a robot and is best-effort only.