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=-0.7 required=3.0 tests=FROM_LOCAL_HEX, 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 D1A12C0650E for ; Mon, 1 Jul 2019 11:38:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B47432089C for ; Mon, 1 Jul 2019 11:38:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728463AbfGALiG (ORCPT ); Mon, 1 Jul 2019 07:38:06 -0400 Received: from mail-io1-f70.google.com ([209.85.166.70]:40949 "EHLO mail-io1-f70.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727815AbfGALiG (ORCPT ); Mon, 1 Jul 2019 07:38:06 -0400 Received: by mail-io1-f70.google.com with SMTP id v11so14845258iop.7 for ; Mon, 01 Jul 2019 04:38:05 -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=2e1SntskR1wk3R8YDQNaXdZrPYNsv+rRW/w+w1Z7SRM=; b=o2s8GePpr/WGF6c6/zsD5IXPXbUTHRtwYZbPjPFfBTNma9Y0WAbkzjIwsLj4ZPxBa6 MGDHbnpKBLwJJvxFk40VBrjaupXoyc2HOREBP88O61andcwd0usUOKKlyn0I4HyLhMOf ZbOP7HPxleM2Nt8F8QmqaADkDc2WS2QsogFyPLmtuNr2uaVVUHkSR3E0KGkSAEGFVrnv BJ5IJ/9/ofM8lA5sPDz4ToySCgVP7IGXPPxBh6b7SxMcqoN2ZFd6BKTtOkWoeuTPw6q7 6QiuHyeKBrByroskbYG7AExuRukzOlO3GP06bsNsA/trTzVY0fnkezX22ktV2AV+TLf7 4sgQ== X-Gm-Message-State: APjAAAUe6NqYvuuvzNlHTboDPRfTJB+8GtQ1TmV6w3gSSBZ/8hwnlL9Z QgyYOlhj21yF9TZX7q0m8JLFAVJapVDheZPHkWEuYrbGxgaK X-Google-Smtp-Source: APXvYqzb4b/7WqvWityk7fhaVl/oiH2xTFhn6YPl44xVi7nfsucuhRQW3JmnuwKx2YDBmqQOU/2rmVfWmlYWSlwLSD3eGgz2hWsP MIME-Version: 1.0 X-Received: by 2002:a05:6638:63a:: with SMTP id h26mr27782115jar.92.1561981085266; Mon, 01 Jul 2019 04:38:05 -0700 (PDT) Date: Mon, 01 Jul 2019 04:38:05 -0700 In-Reply-To: <000000000000cba2b6058ac09eeb@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000bbbb3d058c9d0f6d@google.com> Subject: Re: KMSAN: uninit-value in ax88178_bind From: syzbot To: allison@lohutok.net, davem@davemloft.net, glider@google.com, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, lynxis@fe80.eu, marcel.ziswiler@toradex.com, netdev@vger.kernel.org, opensource@jilayne.com, syzkaller-bugs@googlegroups.com, tglx@linutronix.de, yang.wei9@zte.com.cn, zhang.run@zte.com.cn Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org syzbot has found a reproducer for the following crash on: HEAD commit: 41550654 [UPSTREAM] KVM: x86: degrade WARN to pr_warn_rate.. git tree: kmsan console output: https://syzkaller.appspot.com/x/log.txt?x=1577f4d5a00000 kernel config: https://syzkaller.appspot.com/x/.config?x=40511ad0c5945201 dashboard link: https://syzkaller.appspot.com/bug?extid=abd25d675d47f23f188c compiler: clang version 9.0.0 (/home/glider/llvm/clang 80fee25776c2fb61e74c1ecb1a523375c2500b69) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17ea8283a00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=11a1f57ba00000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+abd25d675d47f23f188c@syzkaller.appspotmail.com usb 1-1: config 0 has no interface number 0 usb 1-1: New USB device found, idVendor=04bb, idProduct=0930, bcdDevice=d2.4a usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 usb 1-1: config 0 descriptor?? ================================================================== BUG: KMSAN: uninit-value in is_valid_ether_addr include/linux/etherdevice.h:195 [inline] BUG: KMSAN: uninit-value in asix_set_netdev_dev_addr drivers/net/usb/asix_devices.c:61 [inline] BUG: KMSAN: uninit-value in ax88178_bind+0x635/0xad0 drivers/net/usb/asix_devices.c:1075 CPU: 1 PID: 30 Comm: kworker/1:1 Not tainted 5.2.0-rc4+ #7 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: usb_hub_wq hub_event Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x191/0x1f0 lib/dump_stack.c:113 kmsan_report+0x162/0x2d0 mm/kmsan/kmsan.c:611 __msan_warning+0x75/0xe0 mm/kmsan/kmsan_instr.c:304 is_valid_ether_addr include/linux/etherdevice.h:195 [inline] asix_set_netdev_dev_addr drivers/net/usb/asix_devices.c:61 [inline] ax88178_bind+0x635/0xad0 drivers/net/usb/asix_devices.c:1075 usbnet_probe+0x10d3/0x3950 drivers/net/usb/usbnet.c:1722 usb_probe_interface+0xd19/0x1310 drivers/usb/core/driver.c:361 really_probe+0x1344/0x1d90 drivers/base/dd.c:513 driver_probe_device+0x1ba/0x510 drivers/base/dd.c:670 __device_attach_driver+0x5b8/0x790 drivers/base/dd.c:777 bus_for_each_drv+0x28e/0x3b0 drivers/base/bus.c:454 __device_attach+0x489/0x750 drivers/base/dd.c:843 device_initial_probe+0x4a/0x60 drivers/base/dd.c:890 bus_probe_device+0x131/0x390 drivers/base/bus.c:514 device_add+0x25b5/0x2df0 drivers/base/core.c:2111 usb_set_configuration+0x309f/0x3710 drivers/usb/core/message.c:2027 generic_probe+0xe7/0x280 drivers/usb/core/generic.c:210 usb_probe_device+0x146/0x200 drivers/usb/core/driver.c:266 really_probe+0x1344/0x1d90 drivers/base/dd.c:513 driver_probe_device+0x1ba/0x510 drivers/base/dd.c:670 __device_attach_driver+0x5b8/0x790 drivers/base/dd.c:777 bus_for_each_drv+0x28e/0x3b0 drivers/base/bus.c:454 __device_attach+0x489/0x750 drivers/base/dd.c:843 device_initial_probe+0x4a/0x60 drivers/base/dd.c:890 bus_probe_device+0x131/0x390 drivers/base/bus.c:514 device_add+0x25b5/0x2df0 drivers/base/core.c:2111 usb_new_device+0x23e5/0x2fb0 drivers/usb/core/hub.c:2534 hub_port_connect drivers/usb/core/hub.c:5089 [inline] hub_port_connect_change drivers/usb/core/hub.c:5204 [inline] port_event drivers/usb/core/hub.c:5350 [inline] hub_event+0x5853/0x7320 drivers/usb/core/hub.c:5432 process_one_work+0x1572/0x1f00 kernel/workqueue.c:2269 worker_thread+0x111b/0x2460 kernel/workqueue.c:2415 kthread+0x4b5/0x4f0 kernel/kthread.c:256 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:355 Local variable description: ----buf@ax88178_bind Variable was created at: ax88178_bind+0x60/0xad0 drivers/net/usb/asix_devices.c:1064 usbnet_probe+0x10d3/0x3950 drivers/net/usb/usbnet.c:1722 ==================================================================