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=-8.7 required=3.0 tests=BAYES_00,FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 82DC8C433FE for ; Tue, 8 Dec 2020 12:14:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 53A8E23406 for ; Tue, 8 Dec 2020 12:14:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729276AbgLHMN6 (ORCPT ); Tue, 8 Dec 2020 07:13:58 -0500 Received: from mail-io1-f72.google.com ([209.85.166.72]:57318 "EHLO mail-io1-f72.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726361AbgLHMN6 (ORCPT ); Tue, 8 Dec 2020 07:13:58 -0500 Received: by mail-io1-f72.google.com with SMTP id e14so14235145iow.23 for ; Tue, 08 Dec 2020 04:13:36 -0800 (PST) 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=sIr2487dPP01PGWAGnpnCKoFqEKwcrRNII54jM9x7Vo=; b=nUVCjNKu/X3cgjJomV2/XkVr26TNKFAbs8qh2RvSiOQowOMRpUk6ETXDN085TC7Z8/ 4I0SfotvnGYKVP1KT05ZpcqG4Jl4JkHIDXc4+8O02KMey91/itLpKr7W4nJq0SOQk66s 2Du5GBK3Y3D/dIwnBpxONVlvmxucck4tLOlWxfdorbjruJEBZO+keUuQwWF13bChSqk5 pqjij5ymn+UFYhYLanG9ekiQ0rW6tMEUntnDxATVznMKEnZOAvZF0byfOeVuCbuLhkjL CSk2DkV0IHlus6XHd9imGiqEAyxW0ZHHsTZidGnwkjbVfPhDLoiut+s2AbXias076qOg MNdA== X-Gm-Message-State: AOAM5338DNNkvwudK/p0z5SY/KX3UGzG+FdjWXmV+tT1X0YocDlGcSSh 0xQMtQR9i7wnzESVnk73tqd2eguUlQwnsGYevOA8nXt3NirR X-Google-Smtp-Source: ABdhPJzQ2sFxvi5gFhKu9t/hT7O5AB3ZxOq2aTRzfBapXieBJ7KJ9ziCrnh8yClmV5kM5K9Qi8xqU11QUwht+toUxIFgc0oqetYN MIME-Version: 1.0 X-Received: by 2002:a92:1906:: with SMTP id 6mr26171612ilz.138.1607429591500; Tue, 08 Dec 2020 04:13:11 -0800 (PST) Date: Tue, 08 Dec 2020 04:13:11 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000cd8dcd05b5f2dd90@google.com> Subject: KMSAN: uninit-value in smsc95xx_wait_eeprom (2) From: syzbot To: UNGLinuxDriver@microchip.com, davem@davemloft.net, glider@google.com, kuba@kernel.org, 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" Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: 73d62e81 kmsan: random: prevent boot-time reports in _mix_.. git tree: https://github.com/google/kmsan.git master console output: https://syzkaller.appspot.com/x/log.txt?x=178d246b500000 kernel config: https://syzkaller.appspot.com/x/.config?x=eef728deea880383 dashboard link: https://syzkaller.appspot.com/bug?extid=94b1393490c2c70b781b compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project.git ca2dcbd030eadbf0aa9b660efe864ff08af6e18b) Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+94b1393490c2c70b781b@syzkaller.appspotmail.com ===================================================== BUG: KMSAN: uninit-value in smsc95xx_wait_eeprom+0x223/0x3e0 drivers/net/usb/smsc95xx.c:303 CPU: 1 PID: 28836 Comm: kworker/1:1 Not tainted 5.10.0-rc4-syzkaller #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+0x21c/0x280 lib/dump_stack.c:118 kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:118 __msan_warning+0x5f/0xa0 mm/kmsan/kmsan_instr.c:197 smsc95xx_wait_eeprom+0x223/0x3e0 drivers/net/usb/smsc95xx.c:303 smsc95xx_read_eeprom+0x46d/0xa10 drivers/net/usb/smsc95xx.c:360 smsc95xx_init_mac_address drivers/net/usb/smsc95xx.c:769 [inline] smsc95xx_bind+0x811/0x1d30 drivers/net/usb/smsc95xx.c:1090 usbnet_probe+0x1169/0x3e90 drivers/net/usb/usbnet.c:1712 usb_probe_interface+0xfcc/0x1520 drivers/usb/core/driver.c:396 really_probe+0xebd/0x2420 drivers/base/dd.c:558 driver_probe_device+0x293/0x390 drivers/base/dd.c:738 __device_attach_driver+0x63f/0x830 drivers/base/dd.c:844 bus_for_each_drv+0x2ca/0x3f0 drivers/base/bus.c:431 __device_attach+0x538/0x860 drivers/base/dd.c:912 device_initial_probe+0x4a/0x60 drivers/base/dd.c:959 bus_probe_device+0x177/0x3d0 drivers/base/bus.c:491 device_add+0x399e/0x3f20 drivers/base/core.c:2936 usb_set_configuration+0x39cf/0x4010 drivers/usb/core/message.c:2159 usb_generic_driver_probe+0x138/0x300 drivers/usb/core/generic.c:238 usb_probe_device+0x317/0x570 drivers/usb/core/driver.c:293 really_probe+0xebd/0x2420 drivers/base/dd.c:558 driver_probe_device+0x293/0x390 drivers/base/dd.c:738 __device_attach_driver+0x63f/0x830 drivers/base/dd.c:844 bus_for_each_drv+0x2ca/0x3f0 drivers/base/bus.c:431 __device_attach+0x538/0x860 drivers/base/dd.c:912 device_initial_probe+0x4a/0x60 drivers/base/dd.c:959 bus_probe_device+0x177/0x3d0 drivers/base/bus.c:491 device_add+0x399e/0x3f20 drivers/base/core.c:2936 usb_new_device+0x1bd6/0x2a30 drivers/usb/core/hub.c:2554 hub_port_connect drivers/usb/core/hub.c:5222 [inline] hub_port_connect_change drivers/usb/core/hub.c:5362 [inline] port_event drivers/usb/core/hub.c:5508 [inline] hub_event+0x5bc9/0x8890 drivers/usb/core/hub.c:5590 process_one_work+0x121c/0x1fc0 kernel/workqueue.c:2272 worker_thread+0x10cc/0x2740 kernel/workqueue.c:2418 kthread+0x51c/0x560 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 Local variable ----buf.i.i@smsc95xx_wait_eeprom created at: __smsc95xx_read_reg drivers/net/usb/smsc95xx.c:77 [inline] smsc95xx_read_reg drivers/net/usb/smsc95xx.c:141 [inline] smsc95xx_wait_eeprom+0x9d/0x3e0 drivers/net/usb/smsc95xx.c:297 __smsc95xx_read_reg drivers/net/usb/smsc95xx.c:77 [inline] smsc95xx_read_reg drivers/net/usb/smsc95xx.c:141 [inline] smsc95xx_wait_eeprom+0x9d/0x3e0 drivers/net/usb/smsc95xx.c:297 ===================================================== --- This report is generated by a bot. 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