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Date:   Sun, 20 Mar 2022 22:10:44 +0800
From:   kernel test robot <>
To:     Mattias Forsblad <>
Cc:     0day robot <>,
        Mattias Forsblad <>,
        LKML <>,,, "David S . Miller" <>,
        Jakub Kicinski <>, Andrew Lunn <>,
        Florian Fainelli <>,
        Vivien Didelot <>,
        Roopa Prabhu <>,
        Tobias Waldekranz <>
Subject: [net]  4c003fec67:


FYI, we noticed the following commit (built with gcc-9):

commit: 4c003fec67078a4e8c1c6e36c7b9fc6303a3bb6f ("[PATCH v2 net-next 2/5] net: bridge: Implement bridge flood flag")
base: 9f01cfbf2922432668c2fd4dfc0413342aaff48b
patch link:

in testcase: hwsim
version: hwsim-x86_64-717e5d7-1_20220313
with following parameters:

	test: group-25
	ucode: 0xec

on test machine: 4 threads Intel(R) Core(TM) i5-6500 CPU @ 3.20GHz with 32G memory

caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):

If you fix the issue, kindly add following tag
Reported-by: kernel test robot <>

2022-03-18 14:42:08 ./ ap_vlan_file_open2
DEV: wlan0: 02:00:00:00:00:00
DEV: wlan1: 02:00:00:00:01:00
DEV: wlan2: 02:00:00:00:02:00
APDEV: wlan3
APDEV: wlan4
START ap_vlan_file_open2 1/1
Test: AP VLAN with open network and vlan_file mapping (2)
Starting AP wlan3
Connect STA wlan0 to AP
Connect STA wlan1 to AP
Connect STA wlan2 to AP
dev1->dev2 unicast data delivery failed
Traceback (most recent call last):
  File "./", line 533, in main
    t(dev, apdev)
  File "/lkp/benchmarks/hwsim/tests/hwsim/", line 77, in test_ap_vlan_file_open2
    hwsim_utils.test_connectivity_iface(dev[0], hapd, "brvlan1")
  File "/lkp/benchmarks/hwsim/tests/hwsim/", line 202, in test_connectivity_iface
    max_tries=max_tries, timeout=timeout)
  File "/lkp/benchmarks/hwsim/tests/hwsim/", line 195, in test_connectivity
    raise Exception(last_err)
Exception: dev1->dev2 unicast data delivery failed
FAIL ap_vlan_file_open2 7.296811 2022-03-18 14:42:16.334599
passed 0 test case(s)
skipped 0 test case(s)
failed tests: ap_vlan_file_open2

To reproduce:

        git clone
        cd lkp-tests
        sudo bin/lkp install job.yaml           # job file is attached in this email
        bin/lkp split-job --compatible job.yaml # generate the yaml file for lkp run
        sudo bin/lkp run generated-yaml-file

        # if come across any failure that blocks the test,
        # please remove ~/.lkp and /lkp dir to run from a clean state.

0-DAY CI Kernel Test Service

View attachment "config-5.17.0-rc7-02494-g4c003fec6707" of type "text/plain" (165862 bytes)

View attachment "job-script" of type "text/plain" (5696 bytes)

Download attachment "dmesg.xz" of type "application/x-xz" (118376 bytes)

View attachment "hwsim" of type "text/plain" (43666 bytes)

View attachment "job.yaml" of type "text/plain" (4582 bytes)

View attachment "reproduce" of type "text/plain" (3550 bytes)

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