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=-8.7 required=3.0 tests=BAYES_00,FROM_LOCAL_DIGITS, FROM_LOCAL_HEX,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham 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 50B79C2D0A8 for ; Sat, 26 Sep 2020 13:57:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 18598221E5 for ; Sat, 26 Sep 2020 13:57:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729291AbgIZN5G (ORCPT ); Sat, 26 Sep 2020 09:57:06 -0400 Received: from mail-il1-f198.google.com ([209.85.166.198]:53468 "EHLO mail-il1-f198.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725208AbgIZN5G (ORCPT ); Sat, 26 Sep 2020 09:57:06 -0400 Received: by mail-il1-f198.google.com with SMTP id v5so4705831ilj.20 for ; Sat, 26 Sep 2020 06:57:06 -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=98+aEA9pvx2wg/3Mq+Ya25XYLOCXE6/GNWyXPqnMQmI=; b=AQ3hQaSEZ3Vrt0TMqfBG9JqcvZ2Dm5vVtGXt1V85xqvsjHyJAd0uztwCrCk+oIz4Ke 7hVSdJfkAweuoq5bh9MfOWzPRO3d5Y4dqWPkPYjzRHFUjDu4TjvRpWVomKmftmCk6m1E 4dsfMK19++Vg+PMjbk3mNR33B+Uu91BiBih1S7og4w+qOg1WfXr5kaD/or9q/UtOic8G pyVJj808bykuUTVD+7+u2KZX2c5FBzpGdqxM1p7UL38tiLVOyRzgs9yrAHimT6o3dyFq USwPH96sm/r4kmiajGKyKB1Yg72VmsrI58Hj9gEyVb25Q6BRkVnm+IDWHXC3TNF1dr/m R0TQ== X-Gm-Message-State: AOAM531edW3NkKl0f+1kRR+OCbDG0OwpNszODYUOVY5LLNOWm0GbZS6F NQhkvDwgskv7JU11ECRTJBLBB54CajZhH0sL5iSulCpgFMnx X-Google-Smtp-Source: ABdhPJwEHUlQ7HZTMy++EzUl9C4w2PR6M7+lIWTJyZZEkxOLPOY2re8GinnzmhAw17RwQpcBBponj46l6L60OPKDUvtr7Dl6PEhi MIME-Version: 1.0 X-Received: by 2002:a92:3554:: with SMTP id c81mr4125160ila.265.1601128625954; Sat, 26 Sep 2020 06:57:05 -0700 (PDT) Date: Sat, 26 Sep 2020 06:57:05 -0700 In-Reply-To: X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000fd66ac05b037ce27@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: io-uring@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 io_uring-5.9 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.