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, 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 C4F7EC433FF for ; Tue, 30 Jul 2019 12:18:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A56832087F for ; Tue, 30 Jul 2019 12:18:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730199AbfG3MSG (ORCPT ); Tue, 30 Jul 2019 08:18:06 -0400 Received: from mail-io1-f71.google.com ([209.85.166.71]:50858 "EHLO mail-io1-f71.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730151AbfG3MSG (ORCPT ); Tue, 30 Jul 2019 08:18:06 -0400 Received: by mail-io1-f71.google.com with SMTP id m26so71253564ioh.17 for ; Tue, 30 Jul 2019 05:18:06 -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=vOp35uav6zh6iUogGIdHDW0ZffcUAcQZbpm1cUh2gsk=; b=b0sBlr6Pc0RgJfy6qJj8qCkAMPrBja5FWDV2FLrbcJfEVDpzCkAryqeilmBNHYYSxr uj4TKWhEASGDqAIOZPdqDHjzzT1KnmT1AT3WhJdcqGkfYbgCw67TBvYV3oSi1UjTcXgV 7KBaDjqHXanQaNU69fH7zISZKS8yZqd0GtdCm0jiPIlSY8D93z5jadqhfGQ0N4L2RZy9 mAgHDblrb/9/KRM/C9NpD3Tp/khe6DN8CwhdNU7NnSn+xhDeamdMtKtqjV0u/OvdwAxM MyWrX9CXls89/raUsFwKltQiyHUbNV94I9XWs/PecyzdX+5F2xZYSaQ4Jx2m9jb2zQq4 B+0w== X-Gm-Message-State: APjAAAUrsk5qlXf1776KJJcpRTdxzpRuNCyuLNKnEeM3Xa1jhfUDE8iA g6yktOFdTql+upQNWSrVCG4E3BaPIu8NBhQbLOQHFePSSMQE X-Google-Smtp-Source: APXvYqwAcFjNISUetpHLf3iUtsi5axYdZZuZ4PkEUlomcatXIk3ZfI8jdVD9HcxIZep6w20pZmstqMHjJ3uAbifdwvsr8aI2XQ5h MIME-Version: 1.0 X-Received: by 2002:a5e:8618:: with SMTP id z24mr5855572ioj.174.1564489085363; Tue, 30 Jul 2019 05:18:05 -0700 (PDT) Date: Tue, 30 Jul 2019 05:18:05 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000302d82058ee5002d@google.com> Subject: KMSAN: uninit-value in smsc95xx_wait_eeprom From: syzbot To: UNGLinuxDriver@microchip.com, 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: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: beaab8a3 fix KASAN build git tree: kmsan console output: https://syzkaller.appspot.com/x/log.txt?x=1685d8bfa00000 kernel config: https://syzkaller.appspot.com/x/.config?x=4db781fe35a84ef5 dashboard link: https://syzkaller.appspot.com/bug?extid=136c17d735f025fc86a7 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+136c17d735f025fc86a7@syzkaller.appspotmail.com usb 1-1: New USB device found, idVendor=0424, idProduct=9908, bcdDevice=6a.5e usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 usb 1-1: config 0 descriptor?? smsc95xx v1.0.6 ================================================================== BUG: KMSAN: uninit-value in smsc95xx_wait_eeprom+0x1fb/0x3d0 drivers/net/usb/smsc95xx.c:300 CPU: 0 PID: 12 Comm: kworker/0:1 Not tainted 5.2.0+ #15 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 smsc95xx_wait_eeprom+0x1fb/0x3d0 drivers/net/usb/smsc95xx.c:300 smsc95xx_read_eeprom+0x3c2/0x920 drivers/net/usb/smsc95xx.c:357 smsc95xx_init_mac_address drivers/net/usb/smsc95xx.c:914 [inline] smsc95xx_bind+0x467/0x1690 drivers/net/usb/smsc95xx.c:1286 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.i.i@smsc95xx_wait_eeprom Variable was created at: __smsc95xx_read_reg drivers/net/usb/smsc95xx.c:80 [inline] smsc95xx_read_reg drivers/net/usb/smsc95xx.c:144 [inline] smsc95xx_wait_eeprom+0xb6/0x3d0 drivers/net/usb/smsc95xx.c:294 smsc95xx_read_eeprom+0x3c2/0x920 drivers/net/usb/smsc95xx.c:357 ================================================================== --- This bug is generated by a bot. 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