From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932397AbdJZI0i (ORCPT ); Thu, 26 Oct 2017 04:26:38 -0400 Received: from szxga05-in.huawei.com ([45.249.212.191]:9512 "EHLO szxga05-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932197AbdJZI0d (ORCPT ); Thu, 26 Oct 2017 04:26:33 -0400 Subject: Re: [PATCH RFC] random: fix syzkaller fuzzer test int overflow To: "Theodore Ts'o" , Greg KH , , , , , References: <1508831057-64195-1-git-send-email-puck.chen@hisilicon.com> <20171024090927.GA20625@kroah.com> <20171024102528.7oywdwjriesoh3mk@thunk.org> <59F02FA0.7090605@hisilicon.com> <20171025065646.GA13386@kroah.com> <59F03887.7020700@hisilicon.com> <20171025084926.mpdec34mog3xcocz@thunk.org> From: Chen Feng Message-ID: <59F19BEB.7090100@hisilicon.com> Date: Thu, 26 Oct 2017 16:25:15 +0800 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.5.1 MIME-Version: 1.0 In-Reply-To: <20171025084926.mpdec34mog3xcocz@thunk.org> Content-Type: text/plain; charset="windows-1252" Content-Transfer-Encoding: 7bit X-Originating-IP: [10.142.193.64] X-CFilter-Loop: Reflected X-Mirapoint-Virus-RAPID-Raw: score=unknown(0), refid=str=0001.0A010206.59F19C2F.001A,ss=1,re=0.000,recu=0.000,reip=0.000,cl=1,cld=1,fgs=0, ip=0.0.0.0, so=2014-11-16 11:51:01, dmn=2013-03-21 17:37:32 X-Mirapoint-Loop-Id: 268a9a7b23ca769d66995e2317b5ca82 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2017/10/25 16:49, Theodore Ts'o wrote: > Other people who have sent me fuzzer test reproducers are able to > reproduce syzkaller logs into a simple C program. Can you explain to > me what the heck: > >> r3 = syz_open_dev$urandom(&(0x7f000000a000)="2f6465762f7572616e646f6d00", 0x0, 0x0) > > means? Take a look at this: https://github.com/google/syzkaller/blob/master/sys/linux/random.txt > > - Ted > >