Received: by 2002:a25:e7d8:0:0:0:0:0 with SMTP id e207csp815381ybh; Thu, 12 Mar 2020 11:37:11 -0700 (PDT) X-Google-Smtp-Source: ADFU+vsyH1A/CvGewYC2+q7sGPxuswgISO4rxcHm5kRsRTmHouTjfeyJUxxNxPbXnn/FFFGhxomj X-Received: by 2002:a9d:23e4:: with SMTP id t91mr7320617otb.125.1584038231251; Thu, 12 Mar 2020 11:37:11 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1584038231; cv=none; d=google.com; s=arc-20160816; b=yVX5eOM6ZsCOQuKnbwHJAA6GYRNXRnqU6YX1qC40WWR+pdqadTlBKR14WYAasM5Br9 9vvxZSnmpiH5+C9+vAEgoZH2cBAh22IPkffE1lvuOM8eA59OAPwHeUoLh9NCOn3wek8v GyWyKtemKDj5R/kNhc1PUxZKBeoAaxvwTdrBMKLtCR6dgYc3t7ra6D1PjqN9PXgWQc7G bHkBucRmaA/2150rCWWQ5rLRzIvGoenm+806estPQceCyTfLsy+/NNg9oST8ox8obs/C 6FSVrZrBSvX90TUUkMf6OiIyoIf92FTH93li60K9k1I6/pW1L2Foz2E7/6ueM1q3Sg3E Jz3A== 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=ir7UeiOgRla46VgJyqdvELP5IALvlHJBWBv4Kon2YiQ=; b=JFoNfmI4SMxDGzjCjuAqM2famefrZtu+3I/GDUOPujs1oZWg8p+PblA25FnL/VlGEW L05BObp04KeBxZSEq1F0cMYzg5cHJxoiRDqHc97YG1vgNL2hjs0RB9MNC5IKAL+c4DXu S800qPzHV85C2Bl8iyajNLUMOhTP6LyodX1zJS0MljvvwASbza5YVwGNhrY3oxSy8biA W5R25Jr9qmdf/mnOBXg94BO9nR+1DjlliZVJpigKMSkH3rarEeqQ3i5dDJZUtTo+0Qfi AQ83cxzc0e5ApS7CGOWs0sGDKr8QJJfIkHtZtF4C38GNfY4z+QLAEJnNUNla4uAmSNEJ /6Gg== 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 h192si2882694oib.166.2020.03.12.11.36.58; Thu, 12 Mar 2020 11:37:11 -0700 (PDT) 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 S1726756AbgCLSfC (ORCPT + 99 others); Thu, 12 Mar 2020 14:35:02 -0400 Received: from mail-io1-f69.google.com ([209.85.166.69]:39938 "EHLO mail-io1-f69.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726733AbgCLSfC (ORCPT ); Thu, 12 Mar 2020 14:35:02 -0400 Received: by mail-io1-f69.google.com with SMTP id z207so2372100iof.7 for ; Thu, 12 Mar 2020 11:35:01 -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=ir7UeiOgRla46VgJyqdvELP5IALvlHJBWBv4Kon2YiQ=; b=UVJq4bKgNRagxL/7qzXTjlp6g5EbFHHpc9Vkg3yf2mGMLdHUD6VC5AeCmrEj9GCPed YvG4evgNTjOgXwKdJR4/mP/o/0UMMj+dtv3mOiqhpM7J0zm6STmuLUTtZpv/Jvhki4PU nozsG6F484OdF4Hbq59+dHg2Xw3t/N+kwibphBZhMNigws9WDR3PLwBpFcjvPnxNjQKc rt6KLHcqpYIlNeSZZr3gfWupRKKrpQI55J3STTFVLCQWL2uLiP01ELWm/RHyx/v+7G2c terXCmG6QDzapwMeGxWdSAt9gTQW6gkcVzqwWLl7VfrrIVK4Uq+J1g3RWfAFZiUqt6zs Pwgg== X-Gm-Message-State: ANhLgQ3hdOoNBee9+1F3VPp3HoGjQQ/gr5VjtYDDcwi3jGriB02m/LsD uPK9bCtChc/ZxCvB/mJXIX84KcZhreZugnSgmmH1PTi9sTvg MIME-Version: 1.0 X-Received: by 2002:a02:5489:: with SMTP id t131mr9106656jaa.134.1584038101466; Thu, 12 Mar 2020 11:35:01 -0700 (PDT) Date: Thu, 12 Mar 2020 11:35:01 -0700 In-Reply-To: X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000059489f05a0ac9cae@google.com> Subject: Re: WARNING: lock held when returning to user space in ovl_write_iter From: syzbot To: jiufei.xue@linux.alibaba.com, linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu, mszeredi@redhat.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+9331a354f4f624a52a55@syzkaller.appspotmail.com Tested on: commit: 63623fd4 Merge tag 'for-linus' of git://git.kernel.org/pub.. git tree: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git kernel config: https://syzkaller.appspot.com/x/.config?x=9833e26bab355358 dashboard link: https://syzkaller.appspot.com/bug?extid=9331a354f4f624a52a55 compiler: gcc (GCC) 9.0.0 20181231 (experimental) patch: https://syzkaller.appspot.com/x/patch.diff?x=134ceef9e00000 Note: testing is done by a robot and is best-effort only.