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=-8.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS 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 45D9FECE58C for ; Fri, 11 Oct 2019 11:17:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2016B214E0 for ; Fri, 11 Oct 2019 11:17:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727922AbfJKLRk (ORCPT ); Fri, 11 Oct 2019 07:17:40 -0400 Received: from mail-io1-f71.google.com ([209.85.166.71]:32892 "EHLO mail-io1-f71.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727226AbfJKLRk (ORCPT ); Fri, 11 Oct 2019 07:17:40 -0400 Received: by mail-io1-f71.google.com with SMTP id g15so14313767ioc.0 for ; Fri, 11 Oct 2019 04:17:38 -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:cc; bh=J6IpSUQHDWERoX2AnvSyjcwg1RqT2lsBVSYteeT19hs=; b=dtcpzD0lFuBWinReiTdmIM2qOxBzVLM09rxvoh53G8hT2ke+0Cgkk2cNkL2RTNhh8c BExilkkARhJ5F5hS+4coF65+jxkQcX75n3De5h6BNWXuWu39yuB9MhvSDo/HisoS69NE T1XyyKUyLwcDE+BDIwoy95Uk/RXDYqxzI7J9PZ6bNpQjHn0Z928CPLrcx9XDVdB4VeAa hUg2G8nS3W0hEq5dDR2zaS1Pq7Zq9SyGiN4eLk9PI9pZBDMB5GQLBAzQXjchtD9NHkuC U73iCKSOrNxzc6OFj6H5x1V6FTRSaNDlGy0bjCa/d1fDPtxmoa1hjNlCt9BYjpv36tc2 pCsA== X-Gm-Message-State: APjAAAWjyYPhTd7p6iLjPbDRMNs4woCEyUJDtu6xKRVsE4hZJtwWzNmO xn2X33EB2L9iFELcUJ1y+B9vXfCBMmxnTBMd1twmAwRWDOwK X-Google-Smtp-Source: APXvYqwES4qEmYyyt71giBG7PfCAe90So4U07Z87aibJC0DoxHzB5GwTlQlGmazSj6Tp5sPaljHQBMN0gA1g6YKo8aclPUOJRcvY MIME-Version: 1.0 X-Received: by 2002:a6b:5814:: with SMTP id m20mr16543044iob.242.1570792657772; Fri, 11 Oct 2019 04:17:37 -0700 (PDT) Date: Fri, 11 Oct 2019 04:17:37 -0700 In-Reply-To: <20191011111732.GA25982@localhost.localdomain> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000061e8090594a0aa4c@google.com> Subject: Re: Re: KMSAN: uninit-value in alauda_check_media From: syzbot To: Jas K Cc: gregkh@linuxfoundation.org, jaskaransingh7654321@gmail.com, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, stern@rowland.harvard.edu, usb-storage@lists.one-eyed-alien.net, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org > Hi, just taking a crack at this. Hope you guys don't mind. > #syz test: https://github.com/google/kasan.git 1e76a3e5 KMSAN bugs can only be tested on https://github.com/google/kmsan.git tree because KMSAN tool is not upstreamed yet. See https://goo.gl/tpsmEJ#kmsan-bugs for details. > diff --git a/drivers/usb/storage/alauda.c b/drivers/usb/storage/alauda.c > index ddab2cd3d2e7..bb309b9ad65b 100644 > --- a/drivers/usb/storage/alauda.c > +++ b/drivers/usb/storage/alauda.c > @@ -452,7 +452,7 @@ static int alauda_init_media(struct us_data *us) > static int alauda_check_media(struct us_data *us) > { > struct alauda_info *info = (struct alauda_info *) us->extra; > - unsigned char status[2]; > + unsigned char *status = us->iobuf; > int rc; > rc = alauda_get_media_status(us, status);