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 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 A76C0ECE58E for ; Mon, 7 Oct 2019 15:09:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7E34421655 for ; Mon, 7 Oct 2019 15:09:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729283AbfJGPJK (ORCPT ); Mon, 7 Oct 2019 11:09:10 -0400 Received: from mail-io1-f71.google.com ([209.85.166.71]:37735 "EHLO mail-io1-f71.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728772AbfJGPJJ (ORCPT ); Mon, 7 Oct 2019 11:09:09 -0400 Received: by mail-io1-f71.google.com with SMTP id u18so27248872ioc.4 for ; Mon, 07 Oct 2019 08:09:08 -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:message-id:subject:from:to; bh=gmo3MNz9xfKzNnITqaWUMkwRN0WlLGJGgGYObtDrNng=; b=a//u0LnCZzi4hN9bCxJdXj9BEq9LQEvheMyrPEPbUOJUvfBl5n6ZLN+vKwaDNyr2N6 gjs/6GebLSQm7xsG8RICgKUrQyUkImnpTgWp15i98Y1ktBCLYH9MF9DX4rLdF2wX2DHk juqqk0J8gdeE//wzEIUia7gJp58vz3A6WLZgcdTmsWpe3zjT3mzk5Ag9n75GfOG90o9q qdfTm6EIcdg02BLSDq1uCcAzjdL+BNPm3RgmwyFAurr1odvvYiG12yLBT8qy1bSLTFeg oQ+krA38peKsG3zy+P7262k1nvq10j4IEbU8q84w33wHYkg8rdY3Y5Te6TbBHXEYyY1K qncQ== X-Gm-Message-State: APjAAAVznKu8oAdNW70+QGjxZM8EhOkIQ2CzmAyuA5CP4F1eiop1Xkfm SuCwaNEn6Tu3e1p+560CgNYSU7bc0nEsXIg1Srbo8M9y1WGu X-Google-Smtp-Source: APXvYqyoxl0OUNr6+mTzCmNDiY9rlgQM5WIhwnJ3imJhR2nES9yjP9P3VZU+njR7WPuRJWlf6++jH9ZrXDmb/JHSnjHggf4rQZGu MIME-Version: 1.0 X-Received: by 2002:a5d:87d7:: with SMTP id q23mr23388461ios.126.1570460948564; Mon, 07 Oct 2019 08:09:08 -0700 (PDT) Date: Mon, 07 Oct 2019 08:09:08 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000f91a330594536e3c@google.com> Subject: KMSAN: uninit-value in ax88772_hw_reset From: syzbot To: davem@davemloft.net, glider@google.com, kstewart@linuxfoundation.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, netdev@vger.kernel.org, swinslow@gmail.com, syzkaller-bugs@googlegroups.com, tglx@linutronix.de, tranmanphong@gmail.com, yang.wei9@zte.com.cn, zhang.run@zte.com.cn 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 found the following crash on: HEAD commit: 1e76a3e5 kmsan: replace __GFP_NO_KMSAN_SHADOW with kmsan_i.. git tree: https://github.com/google/kmsan.git master console output: https://syzkaller.appspot.com/x/log.txt?x=149bdd47600000 kernel config: https://syzkaller.appspot.com/x/.config?x=f03c659d0830ab8d dashboard link: https://syzkaller.appspot.com/bug?extid=bf5335246831e5f75f99 compiler: clang version 9.0.0 (/home/glider/llvm/clang 80fee25776c2fb61e74c1ecb1a523375c2500b69) Unfortunately, I don't have any reproducer for this crash yet. IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+bf5335246831e5f75f99@syzkaller.appspotmail.com ===================================================== BUG: KMSAN: uninit-value in ax88772_bind+0x6ad/0x11f0 drivers/net/usb/asix_devices.c:730 CPU: 1 PID: 31 Comm: kworker/1:1 Not tainted 5.3.0-rc7+ #0 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+0x13a/0x2b0 mm/kmsan/kmsan_report.c:108 __msan_warning+0x73/0xe0 mm/kmsan/kmsan_instr.c:250 ax88772_hw_reset+0x507/0xb40 drivers/net/usb/asix_devices.c:368 ax88772_bind+0x6ad/0x11f0 drivers/net/usb/asix_devices.c:730 usbnet_probe+0x10ae/0x3960 drivers/net/usb/usbnet.c:1722 usb_probe_interface+0xd19/0x1310 drivers/usb/core/driver.c:361 really_probe+0x1373/0x1dc0 drivers/base/dd.c:552 driver_probe_device+0x1ba/0x510 drivers/base/dd.c:709 __device_attach_driver+0x5b8/0x790 drivers/base/dd.c:816 bus_for_each_drv+0x28e/0x3b0 drivers/base/bus.c:454 __device_attach+0x489/0x750 drivers/base/dd.c:882 device_initial_probe+0x4a/0x60 drivers/base/dd.c:929 bus_probe_device+0x131/0x390 drivers/base/bus.c:514 device_add+0x25b5/0x2df0 drivers/base/core.c:2165 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+0x1373/0x1dc0 drivers/base/dd.c:552 driver_probe_device+0x1ba/0x510 drivers/base/dd.c:709 __device_attach_driver+0x5b8/0x790 drivers/base/dd.c:816 bus_for_each_drv+0x28e/0x3b0 drivers/base/bus.c:454 __device_attach+0x489/0x750 drivers/base/dd.c:882 device_initial_probe+0x4a/0x60 drivers/base/dd.c:929 bus_probe_device+0x131/0x390 drivers/base/bus.c:514 device_add+0x25b5/0x2df0 drivers/base/core.c:2165 usb_new_device+0x23e5/0x2fb0 drivers/usb/core/hub.c:2536 hub_port_connect drivers/usb/core/hub.c:5098 [inline] hub_port_connect_change drivers/usb/core/hub.c:5213 [inline] port_event drivers/usb/core/hub.c:5359 [inline] hub_event+0x581d/0x72f0 drivers/usb/core/hub.c:5441 process_one_work+0x1572/0x1ef0 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 Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:150 [inline] kmsan_internal_chain_origin+0xd2/0x170 mm/kmsan/kmsan.c:314 __msan_chain_origin+0x6b/0xe0 mm/kmsan/kmsan_instr.c:184 ax88772_bind+0xa12/0x11f0 drivers/net/usb/asix_devices.c:720 usbnet_probe+0x10ae/0x3960 drivers/net/usb/usbnet.c:1722 usb_probe_interface+0xd19/0x1310 drivers/usb/core/driver.c:361 really_probe+0x1373/0x1dc0 drivers/base/dd.c:552 driver_probe_device+0x1ba/0x510 drivers/base/dd.c:709 __device_attach_driver+0x5b8/0x790 drivers/base/dd.c:816 bus_for_each_drv+0x28e/0x3b0 drivers/base/bus.c:454 __device_attach+0x489/0x750 drivers/base/dd.c:882 device_initial_probe+0x4a/0x60 drivers/base/dd.c:929 bus_probe_device+0x131/0x390 drivers/base/bus.c:514 device_add+0x25b5/0x2df0 drivers/base/core.c:2165 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+0x1373/0x1dc0 drivers/base/dd.c:552 driver_probe_device+0x1ba/0x510 drivers/base/dd.c:709 __device_attach_driver+0x5b8/0x790 drivers/base/dd.c:816 bus_for_each_drv+0x28e/0x3b0 drivers/base/bus.c:454 __device_attach+0x489/0x750 drivers/base/dd.c:882 device_initial_probe+0x4a/0x60 drivers/base/dd.c:929 bus_probe_device+0x131/0x390 drivers/base/bus.c:514 device_add+0x25b5/0x2df0 drivers/base/core.c:2165 usb_new_device+0x23e5/0x2fb0 drivers/usb/core/hub.c:2536 hub_port_connect drivers/usb/core/hub.c:5098 [inline] hub_port_connect_change drivers/usb/core/hub.c:5213 [inline] port_event drivers/usb/core/hub.c:5359 [inline] hub_event+0x581d/0x72f0 drivers/usb/core/hub.c:5441 process_one_work+0x1572/0x1ef0 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.i@asix_get_phy_addr Variable was created at: asix_read_cmd drivers/net/usb/asix_common.c:313 [inline] asix_read_phy_addr drivers/net/usb/asix_common.c:296 [inline] asix_get_phy_addr+0x4d/0x280 drivers/net/usb/asix_common.c:315 ax88772_bind+0x472/0x11f0 drivers/net/usb/asix_devices.c:720 ===================================================== --- This bug is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this bug report. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot.