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 B5104C74A2B for ; Wed, 10 Jul 2019 14:48:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8EE1720645 for ; Wed, 10 Jul 2019 14:48:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727826AbfGJOsH (ORCPT ); Wed, 10 Jul 2019 10:48:07 -0400 Received: from mail-io1-f69.google.com ([209.85.166.69]:55872 "EHLO mail-io1-f69.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727294AbfGJOsH (ORCPT ); Wed, 10 Jul 2019 10:48:07 -0400 Received: by mail-io1-f69.google.com with SMTP id f22so3062931ioh.22 for ; Wed, 10 Jul 2019 07:48:07 -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=ZA5aTkxuyJfzj3O1sG30bKBuT59BmRh1ls1Yctu+BdY=; b=idU4s5G7TZzZcR0ua09P5wkR9borpw5+a8h8SBWAQI3Am2qLsYvWIkL96Fl50BxO9/ xZc2Lhj5WtcmQXEX0g9GslvS18e7QrgSL0b6F7Lv+8rgS7MZVekfl2oZTUXCLtm1bGZ1 0AOZY/+uS56lntj+foBvGiw1P63yHMOedsOPr1gP84rrG+IQAzy3P4I6p6kptXsk/eFz b5O4O1ciECDCeaVBXKDaQFQPys8nIJi9iwvrBDPudT07/OdHi6htFXAAEnT14qPiuWIB 4E01ycAUBgyXFEOZAELUAbfIHiKf5Z1VQ2Z2OGeRdpNhlqP6ooyR6Mgd5ymJvtbLXWvY GRXA== X-Gm-Message-State: APjAAAWj3WUCbm35rTeJb8Fzkmye67UjM9VmhpgONy+UAztQ/lSTi1vO wXyWT2NfiQPi3MFfxJiFpYzsLMvAgQnA8W7rjBccj49+K37E X-Google-Smtp-Source: APXvYqyOk/5D6/KMzRj2m4Cq7PNeRqX7+mwAOKrO+8DHoF4lPTgfFHf2bNjfx7aJ34YANJMszvcc1XjkVgy8wM1Bp7GbIHCV2wS8 MIME-Version: 1.0 X-Received: by 2002:a5e:9747:: with SMTP id h7mr25296075ioq.299.1562770086789; Wed, 10 Jul 2019 07:48:06 -0700 (PDT) Date: Wed, 10 Jul 2019 07:48:06 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000e38991058d54c35f@google.com> Subject: KMSAN: uninit-value in smsc95xx_read_eeprom (2) 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: fe36eb20 kmsan: rework SLUB hooks git tree: kmsan console output: https://syzkaller.appspot.com/x/log.txt?x=1312be5ba00000 kernel config: https://syzkaller.appspot.com/x/.config?x=40511ad0c5945201 dashboard link: https://syzkaller.appspot.com/bug?extid=0dfe788c0e7be7c95931 compiler: clang version 9.0.0 (/home/glider/llvm/clang 80fee25776c2fb61e74c1ecb1a523375c2500b69) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=143976f7a00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1218cfd8600000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+0dfe788c0e7be7c95931@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_eeprom_confirm_not_busy drivers/net/usb/smsc95xx.c:326 [inline] BUG: KMSAN: uninit-value in smsc95xx_read_eeprom+0x203/0x920 drivers/net/usb/smsc95xx.c:345 CPU: 1 PID: 695 Comm: kworker/1:2 Not tainted 5.2.0-rc4+ #11 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_eeprom_confirm_not_busy drivers/net/usb/smsc95xx.c:326 [inline] smsc95xx_read_eeprom+0x203/0x920 drivers/net/usb/smsc95xx.c:345 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.i86@smsc95xx_read_eeprom Variable was created at: __smsc95xx_read_reg drivers/net/usb/smsc95xx.c:330 [inline] smsc95xx_read_reg drivers/net/usb/smsc95xx.c:144 [inline] smsc95xx_eeprom_confirm_not_busy drivers/net/usb/smsc95xx.c:320 [inline] smsc95xx_read_eeprom+0x109/0x920 drivers/net/usb/smsc95xx.c:345 smsc95xx_init_mac_address drivers/net/usb/smsc95xx.c:914 [inline] smsc95xx_bind+0x467/0x1690 drivers/net/usb/smsc95xx.c:1286 ================================================================== --- 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. syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches