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=-5.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no 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 E0951C433E6 for ; Wed, 20 Jan 2021 07:56:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A379023131 for ; Wed, 20 Jan 2021 07:56:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730236AbhATH4z (ORCPT ); Wed, 20 Jan 2021 02:56:55 -0500 Received: from mail.kernel.org ([198.145.29.99]:46548 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729699AbhATHzP (ORCPT ); Wed, 20 Jan 2021 02:55:15 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 7A1C623131; Wed, 20 Jan 2021 07:54:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1611129271; bh=IZ3xNUJOM7Y7pZR3MSGeJWjfTJwPs06jpM1oKNdi11s=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=xn8Lkt8oDvmmS1PqwSGGuEBwe6cVCngU/cM2JI5xiTWP4qByIpyi/JtEquo3Jyaye Uapp/x6+B4eoKjNKOlG6ASb82GsMT2ABwyk2mwJo4O3zu7KitHasFdcZc323d6FrYf y/h8TCiXEm+8SEmN3cH48VE2+GfibWbwzpubAd+U= Date: Wed, 20 Jan 2021 08:54:27 +0100 From: Greg KH To: =?utf-8?B?5oWV5Yas5Lqu?= Cc: linux-kernel , linux-usb@vger.kernel.org, shuah@kernel.org, valentina.manea.m@gmail.com, hdanton@sina.com, syzkaller-bugs , syzkaller Subject: Re: =?utf-8?B?4oCcS0FTQU46IG51bGwtcHRyLWRl?= =?utf-8?Q?ref_Write_in_event=5Fhandler=E2=80=9D_and_=22KASAN=3A_null-ptr-?= =?utf-8?Q?deref_Write_i?= =?utf-8?Q?n?= vhci_shutdown_connection" should share the same root cause. Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jan 20, 2021 at 11:22:11AM +0800, 慕冬亮 wrote: > Dear kernel developers, > > I found that on the syzbot dashboard, “KASAN: null-ptr-deref Write in > event_handler”[1] and > "KASAN: null-ptr-deref Write in vhci_shutdown_connection" () should > share the same root cause. > > > The reasons for the above statement: > 1) the stack trace is the same, and this title difference is due to > the inline property of "vhci_shutdown_connection"; > 2) their PoCs are the same as each other. > > If you can have any issues with this statement or our information is > useful to you, please let us know. Thanks very much. > > [1] KASAN: null-ptr-deref Write in event_handler - > https://syzkaller.appspot.com/bug?id=28cccdd18b4bb8670d077937fb8d4849dca96230 > [2] KASAN: null-ptr-deref Write in vhci_shutdown_connection - > https://syzkaller.appspot.com/bug?id=c21c07f3d51769405e8efc027bdb927515dcc7d6 Great, care to create a patch for this problem? That's the best way to solve these things. thanks, greg k-h