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 autolearn=ham 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 3051FC04AB5 for ; Thu, 6 Jun 2019 13:52:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 115AE20693 for ; Thu, 6 Jun 2019 13:52:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728400AbfFFNwM (ORCPT ); Thu, 6 Jun 2019 09:52:12 -0400 Received: from mail-it1-f199.google.com ([209.85.166.199]:39518 "EHLO mail-it1-f199.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726014AbfFFNwL (ORCPT ); Thu, 6 Jun 2019 09:52:11 -0400 Received: by mail-it1-f199.google.com with SMTP id a62so11922itd.4 for ; Thu, 06 Jun 2019 06:52:11 -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=o0RJU0d7tS36/GBK6WaDEPEeObqvBB53uJC4wjI9+rE=; b=jgCLlwcI9wpRqXKxpdqDFvyFtY8g9el+12QX/BD7+uYcJM4apIJ0zZiRw3+P844eqm vNN9tFLUEoJTmzzihINfcSOzp5SAiS5L2x7YLP0SxYDGofhZhPd9q9RgvUqdW/NB189C PjHyYNhjldCi6gUVtjHVAEwEi2d3Y9Om0CVbFtj5+s0/ZH1wwq36iFUtM6C0LLYLc07G YpKE7jWVotkEZusHGs9ovbc6zH2okSERoMaBXKjT3kqH8BPlii5dSsDW2/aJ74WMnDoM qMsAPmwAkBe3XUA0YF3x8FFmd3XGf8Jx3CC9uJ9CFT4njuzA4x2FPy+/Wfy1Z9OQs+si 4B3Q== X-Gm-Message-State: APjAAAWAbxDNOFuloQWpiVHU6uWHaJX6+EVNQIhrzawQ7YqMeJPAbQOT wTOL6fWDf9CCVKDmwZDNdpi/eA/7nV0v79VJGsm90ZAlhQC3 X-Google-Smtp-Source: APXvYqxVwo54TufnpHAFfpFhBdeK3HzxTn+CVRm0HOfD5CVWXOzrEYA63Z6H1/aHl1GJqijhZAHB6MUIXBwjrIrIgGXeaNOQNSkS MIME-Version: 1.0 X-Received: by 2002:a02:c90d:: with SMTP id t13mr11180876jao.62.1559829130866; Thu, 06 Jun 2019 06:52:10 -0700 (PDT) Date: Thu, 06 Jun 2019 06:52:10 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000417702058aa80506@google.com> Subject: KMSAN: uninit-value in r871xu_drv_init From: syzbot To: Larry.Finger@lwfinger.net, devel@driverdev.osuosl.org, florian.c.schilhabel@googlemail.com, glider@google.com, gregkh@linuxfoundation.org, kai.heng.feng@canonical.com, linux-kernel@vger.kernel.org, straube.linux@gmail.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: f75e4cfe kmsan: use kmsan_handle_urb() in urb.c git tree: kmsan console output: https://syzkaller.appspot.com/x/log.txt?x=153453dea00000 kernel config: https://syzkaller.appspot.com/x/.config?x=602468164ccdc30a dashboard link: https://syzkaller.appspot.com/bug?extid=6f5ecd144854c0d8580b compiler: clang version 9.0.0 (/home/glider/llvm/clang 06d00afa61eef8f7f501ebdb4e8612ea43ec2d78) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=161892c1a00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=11b20986a00000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+6f5ecd144854c0d8580b@syzkaller.appspotmail.com usb 1-1: config 0 has no interface number 0 usb 1-1: New USB device found, idVendor=050d, idProduct=945a, bcdDevice=f1.a1 usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 usb 1-1: config 0 descriptor?? r8712u: register rtl8712_netdev_ops to netdev_ops usb 1-1: r8712u: USB_SPEED_LOW with 0 endpoints usb 1-1: r8712u: Boot from EFUSE: Autoload Failed ================================================================== BUG: KMSAN: uninit-value in r871xu_drv_init+0x17c6/0x2ad0 drivers/staging/rtl8712/usb_intf.c:409 CPU: 1 PID: 17 Comm: kworker/1:0 Not tainted 5.1.0+ #1 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+0x130/0x2a0 mm/kmsan/kmsan.c:622 __msan_warning+0x75/0xe0 mm/kmsan/kmsan_instr.c:310 r871xu_drv_init+0x17c6/0x2ad0 drivers/staging/rtl8712/usb_intf.c:409 usb_probe_interface+0xd66/0x1320 drivers/usb/core/driver.c:361 really_probe+0xdae/0x1d80 drivers/base/dd.c:513 driver_probe_device+0x1b3/0x4f0 drivers/base/dd.c:671 __device_attach_driver+0x5b8/0x790 drivers/base/dd.c:778 bus_for_each_drv+0x28e/0x3b0 drivers/base/bus.c:454 __device_attach+0x454/0x730 drivers/base/dd.c:844 device_initial_probe+0x4a/0x60 drivers/base/dd.c:891 bus_probe_device+0x137/0x390 drivers/base/bus.c:514 device_add+0x288d/0x30e0 drivers/base/core.c:2106 usb_set_configuration+0x30dc/0x3750 drivers/usb/core/message.c:2027 generic_probe+0xe7/0x280 drivers/usb/core/generic.c:210 usb_probe_device+0x14c/0x200 drivers/usb/core/driver.c:266 really_probe+0xdae/0x1d80 drivers/base/dd.c:513 driver_probe_device+0x1b3/0x4f0 drivers/base/dd.c:671 __device_attach_driver+0x5b8/0x790 drivers/base/dd.c:778 bus_for_each_drv+0x28e/0x3b0 drivers/base/bus.c:454 __device_attach+0x454/0x730 drivers/base/dd.c:844 device_initial_probe+0x4a/0x60 drivers/base/dd.c:891 bus_probe_device+0x137/0x390 drivers/base/bus.c:514 device_add+0x288d/0x30e0 drivers/base/core.c:2106 usb_new_device+0x23e5/0x2ff0 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+0x48d1/0x7290 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:254 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:355 Local variable description: ----data@usb_read8 Variable was created at: usb_read8+0x5d/0x130 drivers/staging/rtl8712/usb_ops.c:33 r8712_read8+0xaa/0xd0 drivers/staging/rtl8712/rtl8712_io.c:29 ================================================================== --- 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