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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D228DC433FE for ; Thu, 7 Apr 2022 02:41:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239367AbiDGCn0 (ORCPT ); Wed, 6 Apr 2022 22:43:26 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57800 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239342AbiDGCnY (ORCPT ); Wed, 6 Apr 2022 22:43:24 -0400 Received: from mail-io1-f69.google.com (mail-io1-f69.google.com [209.85.166.69]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9A07A12F167 for ; Wed, 6 Apr 2022 19:41:22 -0700 (PDT) Received: by mail-io1-f69.google.com with SMTP id g16-20020a05660203d000b005f7b3b0642eso2802366iov.16 for ; Wed, 06 Apr 2022 19:41:22 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:date:in-reply-to:message-id:subject :from:to; bh=FPnFLcQyYhCFXk0VrLepSFcekoTeVgMkT+ojeLkwXxg=; b=P2kdDtDPKLhzcBrvE2X+B8Hz4TzrsgkhieMzyNp0PyA9H28nJqFeGz4hGuKhRaFre3 4PNMPdnaKRVGITdNwxN2PQqIsxKOFXJOmBrwn5V8CmqOMY0L4aRpLqpvaI6wiM7o1Ath CVZWT36rzuzGssDCGODbgUmj+YXmQzMIVj/Igne2fb6QpBOuMEu2sbk481Thq/iHgMVd Ulysr66h4smkuwH5ppUIq9TchF+8kjxsKXfOZqQgLGhedNah6hF98BGqhrRCZJbwURe2 v//Y8DbSUhD1LOXf1KOadX6P5hxBWU9UhJFYyU3GnpDXBm+meq0+2uFgnX1LRP3azVGq Ejsg== X-Gm-Message-State: AOAM533ncQ7zagYQdAR8ZzZM2OEjxirNbYz9lKE630bfhifvOlBHYvwA f+xDTmXONIqiBN+Bdh8fhb0eg2lhwc2U0C/X3ZQlvSLvWbzB X-Google-Smtp-Source: ABdhPJzqtrd4sabLux6vR5+l+khyNsFOVbGzr/VFyM/MP5DGx96Qu/ip0omBcn6x9qDeFAImnQx/HZ9s8eAIVjTqfme6Ffi0RUFZ MIME-Version: 1.0 X-Received: by 2002:a92:c691:0:b0:2be:8eab:9f7d with SMTP id o17-20020a92c691000000b002be8eab9f7dmr5431907ilg.26.1649299281836; Wed, 06 Apr 2022 19:41:21 -0700 (PDT) Date: Wed, 06 Apr 2022 19:41:21 -0700 In-Reply-To: <000000000000d56a0305d80c2f2b@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000d27e6705dc07698c@google.com> Subject: Re: [syzbot] KMSAN: uninit-value in ax88179_led_setting From: syzbot To: arnd@arndb.de, dan.carpenter@oracle.com, davem@davemloft.net, glider@google.com, jackychou@asix.com.tw, jannh@google.com, jgg@ziepe.ca, k.kahurani@gmail.com, kbuild-all@lists.01.org, kuba@kernel.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, lkp@intel.com, netdev@vger.kernel.org, pabeni@redhat.com, paskripkin@gmail.com, phil@philpotter.co.uk, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org syzbot has found a reproducer for the following issue on: HEAD commit: 33d9269ef6e0 Revert "kernel: kmsan: don't instrument stack.. git tree: https://github.com/google/kmsan.git master console output: https://syzkaller.appspot.com/x/log.txt?x=158ddbcf700000 kernel config: https://syzkaller.appspot.com/x/.config?x=d830111cc3be873 dashboard link: https://syzkaller.appspot.com/bug?extid=d3dbdf31fbe9d8f5f311 compiler: clang version 14.0.0 (/usr/local/google/src/llvm-git-monorepo 2b554920f11c8b763cd9ed9003f4e19b919b8e1f), GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=146e3dc3700000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+d3dbdf31fbe9d8f5f311@syzkaller.appspotmail.com ax88179_178a 2-1:0.252 (unnamed net_device) (uninitialized): Failed to read reg index 0x0001: -71 ax88179_178a 2-1:0.252 (unnamed net_device) (uninitialized): Failed to read reg index 0x0002: -71 ===================================================== BUG: KMSAN: uninit-value in ax88179_check_eeprom drivers/net/usb/ax88179_178a.c:1074 [inline] BUG: KMSAN: uninit-value in ax88179_led_setting+0x884/0x30b0 drivers/net/usb/ax88179_178a.c:1168 ax88179_check_eeprom drivers/net/usb/ax88179_178a.c:1074 [inline] ax88179_led_setting+0x884/0x30b0 drivers/net/usb/ax88179_178a.c:1168 ax88179_bind+0xf00/0x1a50 drivers/net/usb/ax88179_178a.c:1412 usbnet_probe+0x1251/0x4160 drivers/net/usb/usbnet.c:1747 usb_probe_interface+0xf19/0x1600 drivers/usb/core/driver.c:396 really_probe+0x653/0x14b0 drivers/base/dd.c:596 __driver_probe_device+0x3e9/0x530 drivers/base/dd.c:755 driver_probe_device drivers/base/dd.c:785 [inline] __device_attach_driver+0x79f/0x1120 drivers/base/dd.c:902 bus_for_each_drv+0x2d6/0x3f0 drivers/base/bus.c:427 __device_attach+0x593/0x8e0 drivers/base/dd.c:973 device_initial_probe+0x4a/0x60 drivers/base/dd.c:1020 bus_probe_device+0x17b/0x3e0 drivers/base/bus.c:487 device_add+0x1fff/0x26e0 drivers/base/core.c:3405 usb_set_configuration+0x37e9/0x3ed0 drivers/usb/core/message.c:2170 usb_generic_driver_probe+0x13c/0x300 drivers/usb/core/generic.c:238 usb_probe_device+0x309/0x570 drivers/usb/core/driver.c:293 really_probe+0x653/0x14b0 drivers/base/dd.c:596 __driver_probe_device+0x3e9/0x530 drivers/base/dd.c:755 driver_probe_device drivers/base/dd.c:785 [inline] __device_attach_driver+0x79f/0x1120 drivers/base/dd.c:902 bus_for_each_drv+0x2d6/0x3f0 drivers/base/bus.c:427 __device_attach+0x593/0x8e0 drivers/base/dd.c:973 device_initial_probe+0x4a/0x60 drivers/base/dd.c:1020 bus_probe_device+0x17b/0x3e0 drivers/base/bus.c:487 device_add+0x1fff/0x26e0 drivers/base/core.c:3405 usb_new_device+0x1b8e/0x2950 drivers/usb/core/hub.c:2566 hub_port_connect drivers/usb/core/hub.c:5358 [inline] hub_port_connect_change drivers/usb/core/hub.c:5502 [inline] port_event drivers/usb/core/hub.c:5660 [inline] hub_event+0x58e3/0x89e0 drivers/usb/core/hub.c:5742 process_one_work+0xdb6/0x1820 kernel/workqueue.c:2307 worker_thread+0x10b3/0x21e0 kernel/workqueue.c:2454 kthread+0x3c7/0x500 kernel/kthread.c:377 ret_from_fork+0x1f/0x30 Local variable eeprom.i created at: ax88179_check_eeprom drivers/net/usb/ax88179_178a.c:1045 [inline] ax88179_led_setting+0x2e2/0x30b0 drivers/net/usb/ax88179_178a.c:1168 ax88179_bind+0xf00/0x1a50 drivers/net/usb/ax88179_178a.c:1412 CPU: 0 PID: 7 Comm: kworker/0:1 Not tainted 5.17.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: usb_hub_wq hub_event =====================================================