Received: by 2002:a25:c593:0:0:0:0:0 with SMTP id v141csp5089279ybe; Mon, 9 Sep 2019 21:01:35 -0700 (PDT) X-Google-Smtp-Source: APXvYqxZ3Xjg7uDEfaYwIVKjHkHQe/b80Xj67zNj1jE/Wy5pMVkWSmqz+UoE6u2088lfUfTLEDvM X-Received: by 2002:a17:906:5391:: with SMTP id g17mr22957906ejo.79.1568088095538; Mon, 09 Sep 2019 21:01:35 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1568088095; cv=none; d=google.com; s=arc-20160816; b=CqGhL4sSqX9sVEBYNgWyeZy9n3wT907Mzxak9/+vgBe4CY8QTknBN3GOlCzADp2PlG O/c3aEpAmZJxiDiLZ+ez8G8a9c+FDrlL3bNASfpcAkGPlyzLnaZk6Pko6q2psBRDYWlD AugevZPeVzpYV+bHWjbSvXAKz8IMPS1dWaraOLimFgSN89sY/8dMXnm5jQjFSMJVI2B6 UZnzoFNfK5p2s4G6CkOS3kN+ETKuym9yYKZkVUsnoi38T/cs2i0RzGRBqF4RDyqBZkPw AfHvDNInRexan8uQ77VsH12N3vd75CDXvK+G9bisW9aZjNjfGXP7MGnZKKwFKnMU/6pd T9/Q== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding:mime-version :references:in-reply-to:date:cc:to:from:subject:message-id; bh=lO4J2rU/EcwzUhViPy4CJHf5BMMsX9ZpHcYjshml4n0=; b=hHn+ajvnLjv3ZZOr+5OJOjx/jEP99mCVAZ6TRry/aQULK8ODjaiO7EIcIKXYgugA65 lp74KBpHFroyYUNA0fatuni9oa2V6LUObQDE8hZ4iDoJN2C1nmytgeFs0aS1y5V78+Sx HEl4hj9+nNacC6m9fz2+uFm1+i2ubNZK97K379NEpmVa00WGLCmFCI9akAJD8ACPkGV3 gV28zw1umFiD/6cKZKolSFc0AT2NxBDFZIW5si6lFc/nh0yBg4O48xoVlOaBhvu+hI+/ KNYB0cmQvpWFycd9jmcU3+JM/ElTVRBYUIeEuXn3UoEplqTNlCPo4R7KYrA2NqyKMnmv 7Wwg== 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 Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id f14si9983279edd.134.2019.09.09.21.00.59; Mon, 09 Sep 2019 21:01:35 -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 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389850AbfIIJrd (ORCPT + 99 others); Mon, 9 Sep 2019 05:47:33 -0400 Received: from mx2.suse.de ([195.135.220.15]:36012 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728844AbfIIJrc (ORCPT ); Mon, 9 Sep 2019 05:47:32 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id A21FEAD88; Mon, 9 Sep 2019 09:47:30 +0000 (UTC) Message-ID: <1568022444.365.11.camel@suse.com> Subject: Re: WARNING in hso_free_net_device From: Oliver Neukum To: Hui Peng , Andrey Konovalov Cc: "David S. Miller" , syzkaller-bugs , alexios.zavras@intel.com, Thomas Gleixner , Greg Kroah-Hartman , Mathias Payer , Stephen Hemminger , rfontana@redhat.com, syzbot+44d53c7255bb1aea22d2@syzkaller.appspotmail.com, LKML , USB list , netdev Date: Mon, 09 Sep 2019 11:47:24 +0200 In-Reply-To: <02ef64cc-5053-e6da-fc59-9970f48064c5@gmail.com> References: <0000000000002a95df0591a4f114@google.com> <20190904154140.45dfb398@hermes.lan> <285edb24-01f9-3f9d-4946-b2f41ccd0774@gmail.com> <02ef64cc-5053-e6da-fc59-9970f48064c5@gmail.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.26.6 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Am Donnerstag, den 05.09.2019, 22:05 -0400 schrieb Hui Peng: > > On 9/5/2019 7:24 AM, Andrey Konovalov wrote: > > On Thu, Sep 5, 2019 at 4:20 AM Hui Peng wrote: > > > > > > Can you guys have a look at the attached patch? > > > > Let's try it: > > > > #syz test: https://github.com/google/kasan.git eea39f24 > > > > FYI: there are two more reports coming from this driver, which might > > (or might not) have the same root cause. One of them has a suggested > > fix by Oliver. > > > > https://syzkaller.appspot.com/bug?extid=67b2bd0e34f952d0321e > > https://syzkaller.appspot.com/bug?extid=93f2f45b19519b289613 > > > > I think they are different, though similar. > This one is resulted from unregistering a network device. > These 2 are resulted from unregistering a tty device. Hi, looks like it. That may indeed be the issue. Please try to have syzbot test your patch and we will know more. Regards Oliver