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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E36B6C54EBD for ; Mon, 9 Jan 2023 18:06:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229966AbjAISGc (ORCPT ); Mon, 9 Jan 2023 13:06:32 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48932 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237502AbjAIR6o (ORCPT ); Mon, 9 Jan 2023 12:58:44 -0500 Received: from mail-io1-f70.google.com (mail-io1-f70.google.com [209.85.166.70]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EA77E3D9F7 for ; Mon, 9 Jan 2023 09:56:18 -0800 (PST) Received: by mail-io1-f70.google.com with SMTP id s22-20020a6bdc16000000b006e2d7c78010so5381695ioc.21 for ; Mon, 09 Jan 2023 09:56:18 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=2ppmVtulyeyyJUenOxxEN7joUogVk28fABWLQtu+Zrk=; b=P8SGWlOFGvX344/wj5BAjokIrYAUg2vuYAplNCFC/zNDGX3Fw1JaqY+1xdy2XTGxZm AJebTdMZlDR73Q4yNexRoBOfWxZ2RwVCFAID1lhE0ZEYvrWuvK4fgOmKAaJkWqssjiD6 RJWAkrpbfVVdDrHHd5YUfHrd0q5tW4QSx9b8/kUPjXHd8Ma7rLChCo5JhAjMQge0lX+Y q2uwzfP0/MeA7XOexqxBVfyCZosSNTyNfVH0A/TZPO2+Hu+PO51skJVuXCrl+upq0Ud2 lzyzeVc0dhvMVBF0si3amzEPdnTco3mVjaYcQG4cafTCyCOeu+3q3tV2aJljdvRLH4bl CXBQ== X-Gm-Message-State: AFqh2kp5GfSwUtyr8AZkA9KJwf2Nelmg/x4C2f1DVa9Uk1QXPTICWMUu aoV8rO+yql/25d2lBBrZTQbykSZ1qn7wSYAwWy3qOK/aa1ij X-Google-Smtp-Source: AMrXdXuYn5bcOBvwGt+nMca2O36qYU0o+TCzNmgGZL6gmSSi0E53OgM5oym9IOF7D3MqME8LX2I4TvnlzFCiQxD1N4jO3YQ7Yu+Y MIME-Version: 1.0 X-Received: by 2002:a02:a513:0:b0:38a:1e93:c32f with SMTP id e19-20020a02a513000000b0038a1e93c32fmr4554759jam.212.1673286978314; Mon, 09 Jan 2023 09:56:18 -0800 (PST) Date: Mon, 09 Jan 2023 09:56:18 -0800 In-Reply-To: <000000000000f0fb6005f1cfc17f@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000f328e405f1d87b38@google.com> Subject: Re: [syzbot] KASAN: use-after-free Read in io_wq_worker_wake From: syzbot To: asml.silence@gmail.com, axboe@kernel.dk, io-uring@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org syzbot has bisected this issue to: commit af82425c6a2d2f347c79b63ce74fca6dc6be157f Author: Jens Axboe Date: Mon Jan 2 23:49:46 2023 +0000 io_uring/io-wq: free worker if task_work creation is canceled bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=12cda5d2480000 start commit: 1fe4fd6f5cad Merge tag 'xfs-6.2-fixes-2' of git://git.kern.. git tree: upstream final oops: https://syzkaller.appspot.com/x/report.txt?x=11cda5d2480000 console output: https://syzkaller.appspot.com/x/log.txt?x=16cda5d2480000 kernel config: https://syzkaller.appspot.com/x/.config?x=8b79b14037065d92 dashboard link: https://syzkaller.appspot.com/bug?extid=b3ba2408ce0c74bb9230 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1388e5f2480000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=127f1aa4480000 Reported-by: syzbot+b3ba2408ce0c74bb9230@syzkaller.appspotmail.com Fixes: af82425c6a2d ("io_uring/io-wq: free worker if task_work creation is canceled") For information about bisection process see: https://goo.gl/tpsmEJ#bisection