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=-5.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable 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 C5E33ECE58C for ; Fri, 11 Oct 2019 15:42:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A920E206A1 for ; Fri, 11 Oct 2019 15:42:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728096AbfJKPmC (ORCPT ); Fri, 11 Oct 2019 11:42:02 -0400 Received: from mail-io1-f69.google.com ([209.85.166.69]:41346 "EHLO mail-io1-f69.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727149AbfJKPmC (ORCPT ); Fri, 11 Oct 2019 11:42:02 -0400 Received: by mail-io1-f69.google.com with SMTP id q18so15127309ios.8 for ; Fri, 11 Oct 2019 08:42:01 -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; bh=kFsPfbIuVLLP06mBsnv++deRNxJoBeYlYpS0DCBKJRY=; b=hZeZvRpFrEW0XX0frAgc3PEzrKTDD+kk3y7iqQGDwK7/ZKb3zevlqw91MI+ULmZ/sC haOP+8rP+wiNQcmxbuIQ0NEmImCcUZQXPqO91qEnDBa/I2OsFaTSDxXbX6Vj3e/Otlt+ lhqDON2SbWScPxXuuzIcZiJU/YkDLFdN/S08VvEaJa47MwL+JMa81FYMcz/GollJuySr Ch11DrxvuJP/bgGZZmT2Mn7KEYz+cq5A8q8f+xgMm2G0vh2TrdYVgcg0AULQ6cL1qOqO tTsjBQCoBxAZCA4XTYL7QGUEV7rzmVJXCkNJSz/FEsEDRv0Z/TjYdmvok7nHFFuHonTj 14Og== X-Gm-Message-State: APjAAAXZp2D0mOXTY21J3tf3Wdkrs5vvza5FIQYeGcAAThPcXVSQU6vY zeZaU9XEGREG8n6xtvBGN4RTawpfez5gAR0xsJUle2I0/huS X-Google-Smtp-Source: APXvYqxXLVkmWggCu+Lv+8QrqPqjahv/fK5bYpGS0bKVyVgxGg2uLnvbq0VxIpHqkH2HZnuRzFPxtwoZNQtlC05V5hfbsFmrBVIb MIME-Version: 1.0 X-Received: by 2002:a5e:9b04:: with SMTP id j4mr106545iok.45.1570808521184; Fri, 11 Oct 2019 08:42:01 -0700 (PDT) Date: Fri, 11 Oct 2019 08:42:01 -0700 In-Reply-To: X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000ea5bf90594a45b81@google.com> Subject: Re: KMSAN: uninit-value in alauda_check_media From: syzbot To: glider@google.com, gregkh@linuxfoundation.org, jaskaransingh7654321@gmail.com, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, stern@rowland.harvard.edu, syzkaller-bugs@googlegroups.com, usb-storage@lists.one-eyed-alien.net 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 Hello, syzbot has tested the proposed patch but the reproducer still triggered crash: KMSAN: uninit-value in alauda_check_media ===================================================== BUG: KMSAN: uninit-value in alauda_transport+0x462/0x57f0 drivers/usb/storage/alauda.c:1138 CPU: 1 PID: 11015 Comm: usb-storage Not tainted 5.4.0-rc2+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x191/0x1f0 lib/dump_stack.c:113 kmsan_report+0x14c/0x2c0 mm/kmsan/kmsan_report.c:110 __msan_warning+0x73/0xe0 mm/kmsan/kmsan_instr.c:245 alauda_check_media+0x344/0x3310 drivers/usb/storage/alauda.c:461 alauda_transport+0x462/0x57f0 drivers/usb/storage/alauda.c:1138 usb_stor_invoke_transport+0xf5/0x27e0 drivers/usb/storage/transport.c:606 usb_stor_transparent_scsi_command+0x5d/0x70 drivers/usb/storage/protocol.c:108 usb_stor_control_thread+0xca6/0x11a0 drivers/usb/storage/usb.c:380 kthread+0x4b5/0x4f0 kernel/kthread.c:256 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:355 Local variable description: ----status@alauda_check_media Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 11015 Comm: usb-storage Tainted: G B 5.4.0-rc2+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x191/0x1f0 lib/dump_stack.c:113 panic+0x3c9/0xc1e kernel/panic.c:220 kmsan_report+0x2b4/0x2c0 mm/kmsan/kmsan_report.c:133 __msan_warning+0x73/0xe0 mm/kmsan/kmsan_instr.c:245 alauda_check_media+0x344/0x3310 drivers/usb/storage/alauda.c:461 alauda_transport+0x462/0x57f0 drivers/usb/storage/alauda.c:1138 usb_stor_invoke_transport+0xf5/0x27e0 drivers/usb/storage/transport.c:606 usb_stor_transparent_scsi_command+0x5d/0x70 drivers/usb/storage/protocol.c:108 usb_stor_control_thread+0xca6/0x11a0 drivers/usb/storage/usb.c:380 kthread+0x4b5/0x4f0 kernel/kthread.c:256 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:355 Kernel Offset: disabled Rebooting in 86400 seconds.. Tested on: commit: c40e5c97 kmsan: drop some dead code in kmsan_shadow.c git tree: https://github.com/google/kmsan.git master console output: https://syzkaller.appspot.com/x/log.txt?x=153ba453600000 kernel config: https://syzkaller.appspot.com/x/.config?x=49548798e87d32d7 dashboard link: https://syzkaller.appspot.com/bug?extid=e7d46eb426883fb97efd compiler: clang version 9.0.0 (/home/glider/llvm/clang 80fee25776c2fb61e74c1ecb1a523375c2500b69)