Received: by 2002:a25:1985:0:0:0:0:0 with SMTP id 127csp978197ybz; Wed, 15 Apr 2020 23:59:27 -0700 (PDT) X-Google-Smtp-Source: APiQypLPM/cJ4/Oa/jmmeggoKReDXktjkPg0sAltq/rA2kGJluOroDGOiZsPrxItn+WyiFNL7FlN X-Received: by 2002:a17:906:69d1:: with SMTP id g17mr8250167ejs.32.1587020367763; Wed, 15 Apr 2020 23:59:27 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1587020367; cv=none; d=google.com; s=arc-20160816; b=JyMATXZbXV2g+ooqUnV1rUT+QowazkgtzPI94fg4L78tmW9RbMTZkuKSpWaWIjNIR/ cuZbJGOeow8MjXZiUOCGAnNSFX6KTspQvZEqDhD8kGvxXWF7XKP+eBv92Z5rxG1CX47t EbOnDTK2V/BvrCHjfUQV4fp74B8x6XV4s/OIW78y4TfdZdWZOIIkN3VTyXFX7F2NXmLz OxAZ3GbkQ0sFbdjB28uMgQtJemOXI1ZkTf8YwriOP26/u/eBlNo7UqtWHi5W3+U52u6V U9PfKrFM2Z/4wkcc3itagwV+WTqougj6MUYF7DkIsfEbfL2kDSAUZvKIvrWMuC+2OnH9 S0sQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:to:from:subject:message-id:in-reply-to :date:mime-version; bh=+GQulpXu2Zt/P9Hq8wYFo5idVVKpKyslYLuc6L5PFmk=; b=Kd8l4qmeqrpzvfV17kBQGqyVfT+Kgky+zEVdlsUNjcV4Y4f96pmEc5POovWYp6W+vH Ccfu+szulhAzQiPNHAFxUWemz0VvyV9YJIZCDRyZpJeJ3L9jItqF0PgmmBO0S3UgZ1dc f+sPuoJZi68gKqeDjI1ddv7+/YN1NpUvQO8c7aY65uRcuf1Y+bfL4GLCsjz07M3WgKxf 5gnKdH+hNJ54s88cFxav37y6rUGq4lpj+L8DtlBzMAtvwFQpCdaAx9GMPkqfaKAGQxoE 8Hfp0ObXvrS7UBGc5R7seLOvx4CmlzubjZSAX9fPaC4bfqYks0JJoBbx/2AJeztIa39F qdWw== 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 i4si11051216ejv.473.2020.04.15.23.59.04; Wed, 15 Apr 2020 23:59:27 -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 S2437541AbgDPG6J (ORCPT + 99 others); Thu, 16 Apr 2020 02:58:09 -0400 Received: from mail-io1-f72.google.com ([209.85.166.72]:45661 "EHLO mail-io1-f72.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2437733AbgDPG6D (ORCPT ); Thu, 16 Apr 2020 02:58:03 -0400 Received: by mail-io1-f72.google.com with SMTP id y4so18679228ioy.12 for ; Wed, 15 Apr 2020 23:58:02 -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=+GQulpXu2Zt/P9Hq8wYFo5idVVKpKyslYLuc6L5PFmk=; b=mm9p+FMK13nuCdxJ1YUKqeRAKz2o7PdM+jWtdSwvzl4pDvqmkQfw70pNnQUkH68Vgp +3kNuIyp1rzay3Ogjk2ixoFYXWvctOwnOXtUpgguu+kNl9+jxDotUSCyc90qoPbSk2WU ZPbxXyIJeohMRxGXQbYokjvIUk1+UiA16u6HoO5GRr59rg4/3j9VJcGcDHFXVKGR8+ZB wV9L9o8dR90mzm3iosqEqUfMzJsKo7GZ1KYR9NFKbpxOs6Sjq9623F/3TaJ9u8ZFqMZC tZ+PhcyimovhewqwCUyT6j0/4gehdIANMLFi/Grf90ZXZFtCe8FWvOc8GTz61X9314Ie Iu/w== X-Gm-Message-State: AGi0Pubn/zaTLWYGjPd2qRCItuSlYOty3ZB8XqbupUYNLRjX6TskdJnP wyoIqlVP2M1PKeXcH0zfqgJJUdhfvTJ67dVqHJdikKwfI9Hu MIME-Version: 1.0 X-Received: by 2002:a92:a103:: with SMTP id v3mr9309533ili.194.1587020282361; Wed, 15 Apr 2020 23:58:02 -0700 (PDT) Date: Wed, 15 Apr 2020 23:58:02 -0700 In-Reply-To: X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000002e7e1505a362f4c3@google.com> Subject: Re: possible deadlock in shmem_mfill_atomic_pte From: syzbot To: akpm@linux-foundation.org, hughd@google.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, shy828301@gmail.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org 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 crash: Reported-and-tested-by: syzbot+e27980339d305f2dbfd9@syzkaller.appspotmail.com Tested on: commit: 8f9c86c9 mm: shmem: disable interrupt when acquiring info-.. git tree: https://github.com/yang-shi/linux.git kernel config: https://syzkaller.appspot.com/x/.config?x=11f10cc27c63cade dashboard link: https://syzkaller.appspot.com/bug?extid=e27980339d305f2dbfd9 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.