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=-5.7 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS autolearn=unavailable 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 54E3CC35280 for ; Mon, 30 Sep 2019 22:39:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3415A2168B for ; Mon, 30 Sep 2019 22:39:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731071AbfI3Wje (ORCPT ); Mon, 30 Sep 2019 18:39:34 -0400 Received: from mail-io1-f69.google.com ([209.85.166.69]:38877 "EHLO mail-io1-f69.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729232AbfI3WjP (ORCPT ); Mon, 30 Sep 2019 18:39:15 -0400 Received: by mail-io1-f69.google.com with SMTP id e6so31614380iog.5 for ; Mon, 30 Sep 2019 15:39:15 -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=S+VQhWYaAUm9S3kTD+g6Uv25dCXpksl3TXWhnx7EUec=; b=d0IPA1a68H0kHN2najVAZJLt/8BQFqXJCyNgcN0kZzl4kHGiT9WYzS7m4xgM4YZZrk hkCoigUg/Mb93XPE4Nd7PT12uh/EhG+gNqDXih8q52mrNgKxz6HZvnGKXnemk6szxsK4 +uTaH8CcRWbWU/5GFthmHvhNDDheMyeCOKi8TPQ8C3a/xIy3ef2u4NwVlsCPeMi3vpqW LEhTZhbNU+/+NFHSWd9KiydCEnXEZuCyPW5qgt+WCeHlX8HMw3ZuyO0oGlCCkocDQlbm KXBtRzjriGgmNqKCQ9c+c+swtEy3AyxVbiD4skP2/pxDItZOvsW99R+xwCWXdf3fq0rd MvBg== X-Gm-Message-State: APjAAAVlATPm+x0Q22/enAMKzty7t65sPlZpHLUnf6l2c+iTstU1e0Wp A2DGn6E9BpUtsS4cT0iqpcIeOZ6X3YtiKQy2/cuyZV/sETIf X-Google-Smtp-Source: APXvYqxAGOFqID5P9o7rvH8Pzpjjiu8fp5lk/fQqSI7vrHaUe3UxQ9GKkfOrTWJQgAMXWBPCV+e/RjA9RFpV6uo1Iw2++fmbRajX MIME-Version: 1.0 X-Received: by 2002:a5d:9457:: with SMTP id x23mr7302480ior.14.1569883154839; Mon, 30 Sep 2019 15:39:14 -0700 (PDT) Date: Mon, 30 Sep 2019 15:39:14 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000c889570593cce77b@google.com> Subject: KMSAN: uninit-value in rt2500usb_probe_hw From: syzbot To: davem@davemloft.net, glider@google.com, helmut.schaa@googlemail.com, kvalo@codeaurora.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org, sgruszka@redhat.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: cebbfdbc kmsan: merge set_no_shadow_page() and set_no_orig.. git tree: https://github.com/google/kmsan.git master console output: https://syzkaller.appspot.com/x/log.txt?x=1125cb59600000 kernel config: https://syzkaller.appspot.com/x/.config?x=f03c659d0830ab8d dashboard link: https://syzkaller.appspot.com/bug?extid=35c80b2190255a410f66 compiler: clang version 9.0.0 (/home/glider/llvm/clang 80fee25776c2fb61e74c1ecb1a523375c2500b69) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=146abd21600000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=106a19b5600000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+35c80b2190255a410f66@syzkaller.appspotmail.com usb 1-1: config 0 descriptor?? usb 1-1: reset high-speed USB device number 2 using dummy_hcd usb 1-1: device descriptor read/64, error -71 usb 1-1: Using ep0 maxpacket: 16 ieee80211 phy3: rt2x00usb_vendor_request: Error - Vendor Request 0x09 failed for offset 0x0000 with error -71 ieee80211 phy3: rt2x00_set_chip: Info - Chipset detected - rt: 2570, rf: 0000, rev: 8771 ================================================================== BUG: KMSAN: uninit-value in rt2500usb_init_eeprom drivers/net/wireless/ralink/rt2x00/rt2500usb.c:1443 [inline] BUG: KMSAN: uninit-value in rt2500usb_probe_hw+0xb5e/0x22a0 drivers/net/wireless/ralink/rt2x00/rt2500usb.c:1757 CPU: 0 PID: 3369 Comm: kworker/0:2 Not tainted 5.3.0-rc7+ #0 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 rt2500usb_init_eeprom drivers/net/wireless/ralink/rt2x00/rt2500usb.c:1443 [inline] rt2500usb_probe_hw+0xb5e/0x22a0 drivers/net/wireless/ralink/rt2x00/rt2500usb.c:1757 rt2x00lib_probe_dev+0xba9/0x3260 drivers/net/wireless/ralink/rt2x00/rt2x00dev.c:1427 rt2x00usb_probe+0x7ae/0xf60 drivers/net/wireless/ralink/rt2x00/rt2x00usb.c:842 rt2500usb_probe+0x50/0x60 drivers/net/wireless/ralink/rt2x00/rt2500usb.c:1966 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:2165 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:2165 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: ----reg.i.i@rt2500usb_probe_hw Variable was created at: rt2500usb_register_read drivers/net/wireless/ralink/rt2x00/rt2500usb.c:51 [inline] rt2500usb_init_eeprom drivers/net/wireless/ralink/rt2x00/rt2500usb.c:1440 [inline] rt2500usb_probe_hw+0x774/0x22a0 drivers/net/wireless/ralink/rt2x00/rt2500usb.c:1757 rt2x00lib_probe_dev+0xba9/0x3260 drivers/net/wireless/ralink/rt2x00/rt2x00dev.c:1427 ================================================================== --- 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