From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0377FC2D0A3 for ; Fri, 6 Nov 2020 14:02:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 89E3F20791 for ; Fri, 6 Nov 2020 14:02:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1604671372; bh=4TNhoFgbkYDg/ATGQUj1QVX+p4y66uD0YFZPpI+QAk4=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=zjF+wJzOJ12qv8o0q9uV8tl+Ts1ygZ8rhyIKg2+ZgdN8Ydx4KlYrycd3QUi2r8xMe h9xtYnDJ2Jp9EpaOKxcwoxQ9JPkb6pSa6gMgm5FVUfiEaZ2L5o8+XLCmRZPTPU8k36 VYs444lAOY7tvH1EjD1A4WLviEGsCdkZTnXHScBc= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727420AbgKFOCv (ORCPT ); Fri, 6 Nov 2020 09:02:51 -0500 Received: from mail.kernel.org ([198.145.29.99]:52824 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726565AbgKFOCv (ORCPT ); Fri, 6 Nov 2020 09:02:51 -0500 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id EB25F2071A; Fri, 6 Nov 2020 14:02:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1604671370; bh=4TNhoFgbkYDg/ATGQUj1QVX+p4y66uD0YFZPpI+QAk4=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=zJoL4Zqmg1SI1OxFRn4eXqsYOFfgargZscnuTTmKL4TwA5O0YEZNOt3ekh6tUsALO zmlUUtm814/OAKmTOOJZo99DKtL5u3iKRxvdavg0p3X61C9NmiBkNqiNQtkAXGuZqI i9jT9FAhLOaecZvQQj2ydVYQJOhecKmbM8XuPNCk= Date: Fri, 6 Nov 2020 15:03:36 +0100 From: Greg KH To: syzbot Cc: andreyknvl@google.com, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, rafael@kernel.org, syzkaller-bugs@googlegroups.com Subject: Re: WARNING in input_register_device Message-ID: <20201106140336.GA3319902@kroah.com> References: <000000000000872b5405b36f8e31@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <000000000000872b5405b36f8e31@google.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Nov 06, 2020 at 04:43:17AM -0800, syzbot wrote: > Hello, > > syzbot found the following issue on: > > HEAD commit: 9e39aef3 usb: misc: brcmstb-usb-pinmap: Make sync_all_pins.. > git tree: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing > console output: https://syzkaller.appspot.com/x/log.txt?x=145ffa8a500000 > kernel config: https://syzkaller.appspot.com/x/.config?x=a05f5efbb00b1465 > dashboard link: https://syzkaller.appspot.com/bug?extid=92340f7b2b4789907fdb > compiler: gcc (GCC) 10.1.0-syz 20200507 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=172ae7a8500000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13b24746500000 > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+92340f7b2b4789907fdb@syzkaller.appspotmail.com > > microsoft 0003:045E:07DA.0001: unknown main item tag 0x0 > HID 045e:07da: Invalid code 65791 type 1 > ------------[ cut here ]------------ > init_uevent_argv: buffer size too small > WARNING: CPU: 0 PID: 5 at lib/kobject_uevent.c:259 init_uevent_argv lib/kobject_uevent.c:259 [inline] > WARNING: CPU: 0 PID: 5 at lib/kobject_uevent.c:259 kobject_uevent_env+0x1640/0x1680 lib/kobject_uevent.c:608 You gave it a device with a buffer that was "too small", and it rejected it. Which, aside from the huge warning message, is to be expected, so I don't think this is really a bug here. thanks, greg k-h