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=-5.4 required=3.0 tests=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 96082CA9EA0 for ; Fri, 18 Oct 2019 14:12:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 47869222C3 for ; Fri, 18 Oct 2019 14:12:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2634061AbfJROMO (ORCPT ); Fri, 18 Oct 2019 10:12:14 -0400 Received: from mail-io1-f69.google.com ([209.85.166.69]:40178 "EHLO mail-io1-f69.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2439192AbfJROMK (ORCPT ); Fri, 18 Oct 2019 10:12:10 -0400 Received: by mail-io1-f69.google.com with SMTP id r20so8654408ioh.7 for ; Fri, 18 Oct 2019 07:12:09 -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=HlcGe5jN7UTtW7EzEkZIqtzO8rSWJ3S7oFgrifLHZeQ=; b=b4QgwnoHtQ/xgEDMN6cLbhDPZ8MqyhQscV/YklAcjjRiB9uIUnVfDhxjclhSb+ZR1/ /coXk2wmXIBKjn/zTLBkuzIHN1Tq818ty64PW8eF0BhyDDfUE6beaT67C/QZzjItt+l8 NGMoLkd6xqtzRWQcTSRp6BTxIoMLmRMzfVGCI1iQ6ixvskkFxfs7Ei5bKcZyNcs8NDSp 3lnzPEW5sTLyfTpOB/CTvOeLYMt0U3gORN1OaSXgJpBEg25VHYXqxRlriFWoo/EufELr gEPZ7509fGpotjUDeGA4N8nN1iPO34bglBAaDgLCdVFeLtdjaYGuO+iD6tlQ5Hc429Fu CWvQ== X-Gm-Message-State: APjAAAXKHzq7yXi2lgDu2+ONB71xKvjdKmzGJCRTo+XM0kS8IkcA71XN SxXCmsY4TfyGYajHYpy42Ozn3pzA0Grc9xavL6ZvEIM4lsCu X-Google-Smtp-Source: APXvYqxvl2Lf6XKaDD09V7d6S8o3rUzYZfEVOGj49scmvgTSC1qxYluaaBlj+UCPfz21cGsQ5Cjzs4ZHYGWHrMzxbpUPB6AIUrb1 MIME-Version: 1.0 X-Received: by 2002:a6b:7115:: with SMTP id q21mr6729959iog.303.1571407928563; Fri, 18 Oct 2019 07:12:08 -0700 (PDT) Date: Fri, 18 Oct 2019 07:12:08 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000006120c905952febbd@google.com> Subject: KMSAN: uninit-value in batadv_hard_if_event From: syzbot To: a@unstable.cc, b.a.t.m.a.n@lists.open-mesh.org, davem@davemloft.net, glider@google.com, linux-kernel@vger.kernel.org, mareklindner@neomailbox.ch, netdev@vger.kernel.org, sven@narfation.org, sw@simonwunderlich.de, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: c2453450 kmsan: kcov: prettify the code unpoisoning area->.. git tree: https://github.com/google/kmsan.git master console output: https://syzkaller.appspot.com/x/log.txt?x=10b0c06b600000 kernel config: https://syzkaller.appspot.com/x/.config?x=3684f3c73f43899a dashboard link: https://syzkaller.appspot.com/bug?extid=0183453ce4de8bdf9214 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+0183453ce4de8bdf9214@syzkaller.appspotmail.com usb 1-1: config 0 has no interface number 0 usb 1-1: New USB device found, idVendor=0411, idProduct=0012, bcdDevice=56.5f usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 usb 1-1: config 0 descriptor?? ===================================================== BUG: KMSAN: uninit-value in batadv_check_known_mac_addr net/batman-adv/hard-interface.c:511 [inline] BUG: KMSAN: uninit-value in batadv_hardif_add_interface net/batman-adv/hard-interface.c:942 [inline] BUG: KMSAN: uninit-value in batadv_hard_if_event+0x23c0/0x3260 net/batman-adv/hard-interface.c:1032 CPU: 0 PID: 13223 Comm: kworker/0:3 Not tainted 5.4.0-rc3+ #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+0x14a/0x2f0 mm/kmsan/kmsan_report.c:109 __msan_warning+0x73/0xf0 mm/kmsan/kmsan_instr.c:245 batadv_check_known_mac_addr net/batman-adv/hard-interface.c:511 [inline] batadv_hardif_add_interface net/batman-adv/hard-interface.c:942 [inline] batadv_hard_if_event+0x23c0/0x3260 net/batman-adv/hard-interface.c:1032 notifier_call_chain kernel/notifier.c:95 [inline] __raw_notifier_call_chain kernel/notifier.c:396 [inline] raw_notifier_call_chain+0x13d/0x240 kernel/notifier.c:403 call_netdevice_notifiers_info net/core/dev.c:1749 [inline] call_netdevice_notifiers_extack net/core/dev.c:1761 [inline] call_netdevice_notifiers net/core/dev.c:1775 [inline] register_netdevice+0x2126/0x26a0 net/core/dev.c:8810 register_netdev+0x93/0xd0 net/core/dev.c:8901 rtl8150_probe+0x11ef/0x14a0 drivers/net/usb/rtl8150.c:916 usb_probe_interface+0xd19/0x1310 drivers/usb/core/driver.c:361 really_probe+0xd91/0x1f90 drivers/base/dd.c:552 driver_probe_device+0x1ba/0x510 drivers/base/dd.c:721 __device_attach_driver+0x5b8/0x790 drivers/base/dd.c:828 bus_for_each_drv+0x28e/0x3b0 drivers/base/bus.c:430 __device_attach+0x489/0x750 drivers/base/dd.c:894 device_initial_probe+0x4a/0x60 drivers/base/dd.c:941 bus_probe_device+0x131/0x390 drivers/base/bus.c:490 device_add+0x25b5/0x2df0 drivers/base/core.c:2201 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+0xd91/0x1f90 drivers/base/dd.c:552 driver_probe_device+0x1ba/0x510 drivers/base/dd.c:721 __device_attach_driver+0x5b8/0x790 drivers/base/dd.c:828 bus_for_each_drv+0x28e/0x3b0 drivers/base/bus.c:430 __device_attach+0x489/0x750 drivers/base/dd.c:894 device_initial_probe+0x4a/0x60 drivers/base/dd.c:941 bus_probe_device+0x131/0x390 drivers/base/bus.c:490 device_add+0x25b5/0x2df0 drivers/base/core.c:2201 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 Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:150 [inline] kmsan_internal_chain_origin+0xbd/0x170 mm/kmsan/kmsan.c:317 kmsan_memcpy_memmove_metadata+0x25c/0x2e0 mm/kmsan/kmsan.c:253 kmsan_memcpy_metadata+0xb/0x10 mm/kmsan/kmsan.c:273 __msan_memcpy+0x56/0x70 mm/kmsan/kmsan_instr.c:129 set_ethernet_addr drivers/net/usb/rtl8150.c:282 [inline] rtl8150_probe+0x1143/0x14a0 drivers/net/usb/rtl8150.c:912 usb_probe_interface+0xd19/0x1310 drivers/usb/core/driver.c:361 really_probe+0xd91/0x1f90 drivers/base/dd.c:552 driver_probe_device+0x1ba/0x510 drivers/base/dd.c:721 __device_attach_driver+0x5b8/0x790 drivers/base/dd.c:828 bus_for_each_drv+0x28e/0x3b0 drivers/base/bus.c:430 __device_attach+0x489/0x750 drivers/base/dd.c:894 device_initial_probe+0x4a/0x60 drivers/base/dd.c:941 bus_probe_device+0x131/0x390 drivers/base/bus.c:490 device_add+0x25b5/0x2df0 drivers/base/core.c:2201 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+0xd91/0x1f90 drivers/base/dd.c:552 driver_probe_device+0x1ba/0x510 drivers/base/dd.c:721 __device_attach_driver+0x5b8/0x790 drivers/base/dd.c:828 bus_for_each_drv+0x28e/0x3b0 drivers/base/bus.c:430 __device_attach+0x489/0x750 drivers/base/dd.c:894 device_initial_probe+0x4a/0x60 drivers/base/dd.c:941 bus_probe_device+0x131/0x390 drivers/base/bus.c:490 device_add+0x25b5/0x2df0 drivers/base/core.c:2201 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: ----node_id.i@rtl8150_probe Variable was created at: get_registers drivers/net/usb/rtl8150.c:911 [inline] set_ethernet_addr drivers/net/usb/rtl8150.c:281 [inline] rtl8150_probe+0xdc8/0x14a0 drivers/net/usb/rtl8150.c:912 get_registers drivers/net/usb/rtl8150.c:911 [inline] set_ethernet_addr drivers/net/usb/rtl8150.c:281 [inline] rtl8150_probe+0xdc8/0x14a0 drivers/net/usb/rtl8150.c:912 ===================================================== --- 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.