Received: by 2002:a25:8b12:0:0:0:0:0 with SMTP id i18csp3730050ybl; Mon, 12 Aug 2019 05:32:23 -0700 (PDT) X-Google-Smtp-Source: APXvYqyeyy+dcgNELBfWgMxdWUpJYVA6YcrqxDlfl9GcekUa+Mr4ncqC+8Byb+b2ErEbU/39pHJI X-Received: by 2002:a62:6044:: with SMTP id u65mr34713777pfb.15.1565613143768; Mon, 12 Aug 2019 05:32:23 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1565613143; cv=none; d=google.com; s=arc-20160816; b=LEmR4OrtVPSoNiCSO14beX3domVowrK7nyboV2rtdt1iVsqptbCIm75l6t/bXqO16R 7vm5hyyDH+bRIcZFXwfvULaDwI++GroM/oPDKY7oTf/sCFNO6Mw3QM+Wqg9N/m3+4JUh R3dXamryvJ5GaoFGyLa1aOlXXdiLtqlOaa3dsh6Z/W/FVGhzSxXohzLEFNxK2DkWut+3 eHhExxmYAo3Yw4Y0kJd5qpY4njI8KS66+LJs6CNLdjfKHWSqUTXc/IHGZRZOy9yUgG8L i51euWOo58oDgrmyxacTjsuuR04VtEzzcXzSSphbAPaZAmS2TPUgVBt3wXZEfwVJSwjZ ST2g== 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=uTu/C5kEoXRr3czNQDVPHfrZDcI2hFsg6TBFRhIIG1U=; b=sdK9pYsJLPENMpyfTB2ZLVtiRJkh418ybyWsCnOVg9Rta2KhMNBxlZEJZfHCW19wn4 dTYoUWMRKpgwHbtrZisZQ3lW3u6GRkucfVIxT6A3/Ufns8KKX+AbNecMUI6KgJx6AgR7 G7xyo2ryS/U/AUQvoVK3+pw2H+lKO16O00EwHc48v6iswSHgVxK+Ms/SrP60d1QPxMRz gTOxS/irea/k2eZKSYAI2k9SGUxuLtctr7LjrTLagbCoyyyyNQroBGCVWoTkmmE/pkl/ zAJDxSV6Sz5s8MGe0y2OSjZDOF8IaHmrphkAN6KOXnYkGhlv95RpScSvGKkkiFuOReEW Xzzw== 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 j1si65433474pfa.91.2019.08.12.05.32.08; Mon, 12 Aug 2019 05:32:23 -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 S1728734AbfHLMbB (ORCPT + 99 others); Mon, 12 Aug 2019 08:31:01 -0400 Received: from mail-ot1-f72.google.com ([209.85.210.72]:35155 "EHLO mail-ot1-f72.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728449AbfHLMbB (ORCPT ); Mon, 12 Aug 2019 08:31:01 -0400 Received: by mail-ot1-f72.google.com with SMTP id d14so44381625otf.2 for ; Mon, 12 Aug 2019 05:31:01 -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=uTu/C5kEoXRr3czNQDVPHfrZDcI2hFsg6TBFRhIIG1U=; b=A/Ta3qcSC34TCqV2fjAhctMPMDK4KsmyaDVz2QpYvyYnRtwkSHa66rtHIecA9dlQRG oyuB0+898CsnjCvw1cRDC1eUVN9Ux9IjuNQefM3iwX9FZnx1k24Epf6Oc/tpo4wsxriU lQtw+zUabpcVtkC9phPAiX6cKGwvw4T3l+vpKTJLZFnbfeN/V3R7rIM0N3qwDI68UsF7 BA2mq8W5ZtFNLNSYOg2Lb9wtgNZIsHvwP/yeWnwYyw5/6ZN8SAcCcFR3bjNYQ/hFhugw lmZKB0JDbJMtdVHqskR9tss5bUt9qDOT+3WfjK2fKjP4ete8imDJzY735gla6MJw/cV7 xRsw== X-Gm-Message-State: APjAAAXWjqDcM3cSFay5K3MC96w61lwmFN5GZotajpNz1hqyOeoM7kMq pwAveRZv8VB2Ol0thZGov+7ql+B0QpEOasyhQqHilS81zdSi MIME-Version: 1.0 X-Received: by 2002:a5e:d507:: with SMTP id e7mr21142454iom.284.1565613060687; Mon, 12 Aug 2019 05:31:00 -0700 (PDT) Date: Mon, 12 Aug 2019 05:31:00 -0700 In-Reply-To: X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000569062058feab2e2@google.com> Subject: Re: possible deadlock in usb_deregister_dev From: syzbot To: andreyknvl@google.com, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, oneukum@suse.de, stern@rowland.harvard.edu, syzkaller-bugs@googlegroups.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+a64a382964bf6c71a9c0@syzkaller.appspotmail.com Tested on: commit: e96407b4 usb-fuzzer: main usb gadget fuzzer driver git tree: https://github.com/google/kasan.git kernel config: https://syzkaller.appspot.com/x/.config?x=cfa2c18fb6a8068e compiler: gcc (GCC) 9.0.0 20181231 (experimental) patch: https://syzkaller.appspot.com/x/patch.diff?x=16a8a38c600000 Note: testing is done by a robot and is best-effort only.