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 C805CC19759 for ; Thu, 1 Aug 2019 15:28:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8FC9521773 for ; Thu, 1 Aug 2019 15:28:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731888AbfHAP2S (ORCPT ); Thu, 1 Aug 2019 11:28:18 -0400 Received: from mail-io1-f70.google.com ([209.85.166.70]:44174 "EHLO mail-io1-f70.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731471AbfHAP2J (ORCPT ); Thu, 1 Aug 2019 11:28:09 -0400 Received: by mail-io1-f70.google.com with SMTP id s9so79585721iob.11 for ; Thu, 01 Aug 2019 08:28:09 -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=9OrhS1Md+Rq3EX4l7WvmGe2LPfPlaYOCG4y1gNpyFsE=; b=ooXJYyvf1SHyertX0SchhLnNrslTDSV6R3X9HU6eEtfE37APKl73tLaowy4MDXQCN1 xuyrRb1+f4QXvFcC3kJvWkDfMWkxzsNopC0rHnyK3s4ao7C+YPAJSWMAKHsDB5HDSuOA DMAesZSHsy6nukcxAdt8Uy6oyL30nvvTNqy9xeD24fS/567p0Vsmpx5AmDMM2L9jrxrP ki3uZsElgkeUkdsIoHNwMBy2EghopfxID0oVY0smSmJKcwHF3VaNOpgPB7nxg6ZxqkvK hjneGgHUoaIzYjFI/NB2tTdhpda9Y8/ohs51CXubBADIG9ewNW3GBYZ9X24FxqFBOCgZ YNuw== X-Gm-Message-State: APjAAAXUQ9+cSt+j53T1uu5Wp+NxPHl8CtfwgOzuKJIRrub3CrQY2oEx 25oSq1diRiGtToMAfqQLjIdQWDLIzD1VNrLlb1u6zPTXGocG X-Google-Smtp-Source: APXvYqz5ueeQC/nNSWcHxnEpiw5OKXizQ69CiJaIkmmb7xQGSfCUqd3Y5/vdkpuevtrmaG+egopyy2ut1xMS8kBfohtJA2FgsF/K MIME-Version: 1.0 X-Received: by 2002:a02:a581:: with SMTP id b1mr10126571jam.84.1564673288556; Thu, 01 Aug 2019 08:28:08 -0700 (PDT) Date: Thu, 01 Aug 2019 08:28:08 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000008dd940058f0fe36a@google.com> Subject: KMSAN: kernel-usb-infoleak in usbnet_write_cmd From: syzbot To: glider@google.com, gregkh@linuxfoundation.org, gustavo@embeddedor.com, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, 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: 41550654 [UPSTREAM] KVM: x86: degrade WARN to pr_warn_rate.. git tree: kmsan console output: https://syzkaller.appspot.com/x/log.txt?x=13a0b07da00000 kernel config: https://syzkaller.appspot.com/x/.config?x=40511ad0c5945201 dashboard link: https://syzkaller.appspot.com/bug?extid=b33fff3d3de984c82064 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+b33fff3d3de984c82064@syzkaller.appspotmail.com ax88179_178a 3-1:0.239 (unnamed net_device) (uninitialized): Failed to write reg index 0x001f: -71 ax88179_178a 3-1:0.239 (unnamed net_device) (uninitialized): Failed to write reg index 0x001e: -71 ax88179_178a 3-1:0.239 (unnamed net_device) (uninitialized): Failed to read reg index 0x001a: -71 ax88179_178a 3-1:0.239 (unnamed net_device) (uninitialized): Failed to read reg index 0x001c: -71 ================================================================== BUG: KMSAN: kernel-usb-infoleak in usb_submit_urb+0x7ef/0x1f50 drivers/usb/core/urb.c:405 CPU: 0 PID: 12 Comm: kworker/0:1 Not tainted 5.2.0-rc4+ #7 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.c:611 kmsan_internal_check_memory+0x974/0xa80 mm/kmsan/kmsan.c:705 kmsan_handle_urb+0x28/0x40 mm/kmsan/kmsan_hooks.c:617 usb_submit_urb+0x7ef/0x1f50 drivers/usb/core/urb.c:405 usb_start_wait_urb+0x143/0x410 drivers/usb/core/message.c:58 usb_internal_control_msg drivers/usb/core/message.c:102 [inline] usb_control_msg+0x49f/0x7f0 drivers/usb/core/message.c:156 __usbnet_write_cmd drivers/net/usb/usbnet.c:2020 [inline] usbnet_write_cmd+0x386/0x430 drivers/net/usb/usbnet.c:2058 __ax88179_write_cmd drivers/net/usb/ax88179_178a.c:223 [inline] ax88179_write_cmd drivers/net/usb/ax88179_178a.c:323 [inline] ax88179_led_setting+0x1c76/0x2be0 drivers/net/usb/ax88179_178a.c:1184 ax88179_bind+0xe01/0x1a10 drivers/net/usb/ax88179_178a.c:1305 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 Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:201 [inline] kmsan_save_stack mm/kmsan/kmsan.c:213 [inline] kmsan_internal_chain_origin+0xcc/0x150 mm/kmsan/kmsan.c:414 kmsan_memcpy_memmove_metadata+0x9f9/0xe00 mm/kmsan/kmsan.c:297 kmsan_memcpy_metadata+0xb/0x10 mm/kmsan/kmsan.c:317 __msan_memcpy+0x56/0x70 mm/kmsan/kmsan_instr.c:139 kmemdup+0x107/0x140 mm/util.c:121 __usbnet_write_cmd drivers/net/usb/usbnet.c:2009 [inline] usbnet_write_cmd+0x168/0x430 drivers/net/usb/usbnet.c:2058 __ax88179_write_cmd drivers/net/usb/ax88179_178a.c:223 [inline] ax88179_write_cmd drivers/net/usb/ax88179_178a.c:323 [inline] ax88179_led_setting+0x1c76/0x2be0 drivers/net/usb/ax88179_178a.c:1184 ax88179_bind+0xe01/0x1a10 drivers/net/usb/ax88179_178a.c:1305 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 Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:201 [inline] kmsan_save_stack mm/kmsan/kmsan.c:213 [inline] kmsan_internal_chain_origin+0xcc/0x150 mm/kmsan/kmsan.c:414 __msan_chain_origin+0x6b/0xe0 mm/kmsan/kmsan_instr.c:200 ax88179_write_cmd drivers/net/usb/ax88179_178a.c:321 [inline] ax88179_led_setting+0x20d3/0x2be0 drivers/net/usb/ax88179_178a.c:1184 ax88179_bind+0xe01/0x1a10 drivers/net/usb/ax88179_178a.c:1305 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.i129@ax88179_led_setting Variable was created at: __ax88179_read_cmd drivers/net/usb/ax88179_178a.c:226 [inline] ax88179_read_cmd drivers/net/usb/ax88179_178a.c:299 [inline] ax88179_led_setting+0x18ef/0x2be0 drivers/net/usb/ax88179_178a.c:1138 ax88179_bind+0xe01/0x1a10 drivers/net/usb/ax88179_178a.c:1305 Bytes 0-1 of 2 are uninitialized Memory access of size 2 starts at ffff888039cbbad0 ================================================================== --- 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.