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=-0.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 15A93C32751 for ; Wed, 7 Aug 2019 11:48:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E34F921BF6 for ; Wed, 7 Aug 2019 11:48:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729550AbfHGLsG (ORCPT ); Wed, 7 Aug 2019 07:48:06 -0400 Received: from mail-ot1-f69.google.com ([209.85.210.69]:34154 "EHLO mail-ot1-f69.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726773AbfHGLsG (ORCPT ); Wed, 7 Aug 2019 07:48:06 -0400 Received: by mail-ot1-f69.google.com with SMTP id 20so10758544oty.1 for ; Wed, 07 Aug 2019 04:48:05 -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:message-id:subject:from:to; bh=GoZRE87G5nmPn2K8yJgOw8W+FOPUWswgfdnrBbwx8HE=; b=Z7B6TLY5ObjMC755Ala/HptTEoxn1E8Epc6JOn5tSFruIVl25TXjpH9A4LmEuJ0xRl ktBgJIIxUzIdglolgO8e6apoFVrXIGfS09koztbvlWQyLsbT83wtaFd2SaNpaviz2eI8 SfFtVX7lJgBqqZZJjn59vylBrdX3zKnB7xaGg/3LtdIEgLFSC23gzz//NTbe2m8q3/Vs 2k6/3KCSrPVLgkXl6HpbyBZGrU/PZHjjc3k035yFiWZcmO/a8T4m2uC2P4hdxxE6HHtk JIGOB7e+TMUL+9/uuovL5vNLcsam2Z9bGqBEGMuK5gUA5QD6Wa2hUJo1UOHLLSQ6DfKQ 3Mkw== X-Gm-Message-State: APjAAAXgBS0k31Y4e42Sq1gEeBvkpFIsImVpRZvDseFKtzJd90K2/nna EJ+b/EoChos6dU+QzyTmVP8zHgLCjw99VrbPBVQrg+/15z+s X-Google-Smtp-Source: APXvYqxNxE4YTZ+L2Gw7fd493v4JQnlEXMFWmmOWo0R8nRsooRqqZBNEK5vZN+wNttdNxrhC10CHlgomhtLGMzk/HML3NnGXpeMK MIME-Version: 1.0 X-Received: by 2002:a6b:6d08:: with SMTP id a8mr8669980iod.191.1565178485118; Wed, 07 Aug 2019 04:48:05 -0700 (PDT) Date: Wed, 07 Aug 2019 04:48:05 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000009d9e43058f85838c@google.com> Subject: KMSAN: uninit-value in smsc75xx_wait_eeprom From: syzbot To: davem@davemloft.net, glider@google.com, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, netdev@vger.kernel.org, steve.glendinning@shawell.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 Hello, syzbot found the following crash on: HEAD commit: ae0c578a kmsan: include gfp.h from kmsan.h git tree: kmsan console output: https://syzkaller.appspot.com/x/log.txt?x=10e4f474600000 kernel config: https://syzkaller.appspot.com/x/.config?x=27abc558ecb16a3b dashboard link: https://syzkaller.appspot.com/bug?extid=532222e4d7ddadadd1c8 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+532222e4d7ddadadd1c8@syzkaller.appspotmail.com usb 2-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 usb 2-1: config 0 descriptor?? smsc75xx v1.0.0 ================================================================== BUG: KMSAN: uninit-value in smsc75xx_wait_eeprom+0x1fb/0x3d0 drivers/net/usb/smsc75xx.c:307 CPU: 1 PID: 10983 Comm: kworker/1:5 Not tainted 5.3.0-rc3+ #16 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_report.c:109 __msan_warning+0x75/0xe0 mm/kmsan/kmsan_instr.c:294 smsc75xx_wait_eeprom+0x1fb/0x3d0 drivers/net/usb/smsc75xx.c:307 smsc75xx_read_eeprom+0x3c2/0x920 drivers/net/usb/smsc75xx.c:364 smsc75xx_init_mac_address drivers/net/usb/smsc75xx.c:771 [inline] smsc75xx_bind+0x675/0x12d0 drivers/net/usb/smsc75xx.c:1489 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:2114 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:2114 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.i@smsc75xx_wait_eeprom Variable was created at: __smsc75xx_read_reg drivers/net/usb/smsc75xx.c:83 [inline] smsc75xx_read_reg drivers/net/usb/smsc75xx.c:147 [inline] smsc75xx_wait_eeprom+0xb6/0x3d0 drivers/net/usb/smsc75xx.c:301 smsc75xx_read_eeprom+0x3c2/0x920 drivers/net/usb/smsc75xx.c:364 ================================================================== --- This bug is generated by a bot. 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