Received: by 2002:ad5:474a:0:0:0:0:0 with SMTP id i10csp7484161imu; Tue, 22 Jan 2019 06:48:52 -0800 (PST) X-Google-Smtp-Source: ALg8bN4tCfegJtCeeXizUDXnSp/CcWIkNhAfnCm29NZhbKAnPvccfsz5czF2Kt9WqUwJV6Kpfo8V X-Received: by 2002:a63:2744:: with SMTP id n65mr32185956pgn.65.1548168532786; Tue, 22 Jan 2019 06:48:52 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1548168532; cv=none; d=google.com; s=arc-20160816; b=bELFrrqCMN4U1bHoY8pXRSJ94mN4HUhe2jMD/ebQAjmbPqh+mYI+h+uYYfHzToGjt6 ZXrkQEGSmNZedvcWYL6hyJIICGxwHu9zH+pwOavljYytkItcJRyhP0+KAwgZVeUA0+OM g9jmz0Xuq7S5pWCrS2vYFvpQu7GmdoN3aiJQJWLfVU7OSEfdIhWXDgR2WOVsS5fKBfuB El3OZGILjc0KUtlXZ4+DaXplULUCsvwSuu2j/c+CBLPT6eJrbEZhcczJ66eagBWp23qQ 9h1Bibstwek9vkAjQlrTM1zmnneuwyKd8PwvJSyFFG01uo5LmB+Rkii2kLL8v6WUi3Hm Z0UA== 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=tZ75i4rbvSM77zRbeSNhYTFR1GllBSkW3HGwpNt3Sd8=; b=AVkpOoaS7KvfwPXoHLz2kAW2Uw9zZMgfsb7RFF4/VWIFVBgn7N0VnGcyAM9yxHymmV AfPruPJ3iroL2ApvTM3k/tQvMMdWKM8wqqzY4E87AW2sLy4EwNnWqt5OuUENnlkPHCUW kCDnn0/WU4tQYyqZzW05jYr5xoK7ELRv2WxivV2GI6gN9xyBQHRyN0oihiRbsfgidtSX WSRPESUdR+kT5XdYZwNMT/Fq83I84G40O9KAYNt2s/FItuBOEsCDhxlFjQVjuBSRydIP FoNOc5gb6dFXfENcNjjV95PMD/1XHghjL2PfPSjwDq15KuD+eDcIQGGzv4uU+QqSP5Ja BfiQ== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 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. [209.132.180.67]) by mx.google.com with ESMTP id 80si16076444pfz.11.2019.01.22.06.48.36; Tue, 22 Jan 2019 06:48:52 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 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 S1728875AbfAVOqE (ORCPT + 99 others); Tue, 22 Jan 2019 09:46:04 -0500 Received: from mail-it1-f197.google.com ([209.85.166.197]:44943 "EHLO mail-it1-f197.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728736AbfAVOqE (ORCPT ); Tue, 22 Jan 2019 09:46:04 -0500 Received: by mail-it1-f197.google.com with SMTP id x82so13282477ita.9 for ; Tue, 22 Jan 2019 06:46:03 -0800 (PST) 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=tZ75i4rbvSM77zRbeSNhYTFR1GllBSkW3HGwpNt3Sd8=; b=pV7hlLPLUb5wxk8GdNPDAKKWkEUOaKkyLYyDF6rG/Pe9dXduVcxJ54IAVc4buBIu6T G8w727faS8UWkJ6YCfuFA4RPBtKUGeddLdoXogcITpKJnFnlhyXGLT7WR97gDiYiiAbM VUMN69/8AvPuSq6DfWu53Yfjwqp6m+DXlnu/kr2CJN1v+LvN89bDJdL7wj7bZLCaH+ax lULaaYgPZ21VM5pEhxTCVYvI43gs37Ah0hSpiN2RQLlXbnJS59AdYrH3gtAGJOc9RZ+Q e4nOESmmZ+mWd+vcbgnCUqXHOFMCrnY0WkjZ/gRdnLcYM6OYQ0lJytP4AHEibFdPoIAI gCiA== X-Gm-Message-State: AHQUAuaE3SeJTuqKBIIPVHmJkBLmXktJmWEFFbJWtuX1Wof2YB+4lCHM O3OP3twgSKN568G9rEbZ9P74Ss/9Sflll2aCR2D5bMA7cqw7 MIME-Version: 1.0 X-Received: by 2002:a5d:9ad7:: with SMTP id x23mr917387ion.21.1548168363115; Tue, 22 Jan 2019 06:46:03 -0800 (PST) Date: Tue, 22 Jan 2019 06:46:03 -0800 In-Reply-To: X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000005609bd05800d09e9@google.com> Subject: Re: possible deadlock in shmem_fallocate (2) From: syzbot To: arve@android.com, dvyukov@google.com, hughd@google.com, joelaf@google.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, penguin-kernel@i-love.sakura.ne.jp, syzkaller-bugs@googlegroups.com, tkjos@google.com, willy@infradead.org, xieyisheng1@huawei.com Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes 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+4b8b031b89e6b96c4b2e@syzkaller.appspotmail.com Tested on: commit: 48b161983ae5 Merge tag 'xarray-5.0-rc3' of git://git.infra.. git tree: upstream kernel config: https://syzkaller.appspot.com/x/.config?x=864ab9949c515a07 compiler: gcc (GCC) 9.0.0 20181231 (experimental) patch: https://syzkaller.appspot.com/x/patch.diff?x=1064a9a0c00000 Note: testing is done by a robot and is best-effort only.