Greeting,

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

commit: 8cafe19852d95d6494cbd8c1ae24dbd621588a91 ("[PATCH v2 21/22] mac80211_hwsim: indicate support for S1G")
url: https://github.com/0day-ci/linux/commits/Thomas-Pedersen/add-support-for-S1G-association/20200901-045826
base: https://git.kernel.org/cgit/linux/kernel/git/jberg/mac80211-next.git master

in testcase: hwsim
version: hwsim-x86_64-6eb6cf0-1_20200619
with following parameters:

	group: hwsim-19
	ucode: 0x21



on test machine: 8 threads Intel(R) Core(TM) i7-3770K CPU @ 3.50GHz with 16G 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 <rong.a.chen@intel.com>



2020-09-05 17:49:30 	./run-tests.py fst_ap_config_default 
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 fst_ap_config_default 1/1
Test: FST AP configuration default parameters
kill_pid: pidfile logs/current/myhostapd.pid does not exist - try again after a second
kill_pid: pidfile logs/current/myhostapd.pid does not exist - could not kill the process
hostapd didn't start with valid config parameters
Traceback (most recent call last):
  File "./run-tests.py", line 531, in main
    t(dev, apdev, params)
  File "/lkp/benchmarks/hwsim/tests/hwsim/test_fst_config.py", line 406, in test_fst_ap_config_default
    raise Exception("hostapd didn't start with valid config parameters")
Exception: hostapd didn't start with valid config parameters
FAIL fst_ap_config_default 1.201026 2020-09-05 17:49:31.626224
passed 0 test case(s)
skipped 0 test case(s)
failed tests: fst_ap_config_default
2020-09-05 17:49:31 	./run-tests.py fst_ap_config_good 
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 fst_ap_config_good 1/1
Test: FST AP configuration good parameters
kill_pid: pidfile logs/current/myhostapd.pid does not exist - try again after a second
kill_pid: pidfile logs/current/myhostapd.pid does not exist - could not kill the process
hostapd didn't start with valid config parameters
Traceback (most recent call last):
  File "./run-tests.py", line 531, in main
    t(dev, apdev, params)
  File "/lkp/benchmarks/hwsim/tests/hwsim/test_fst_config.py", line 400, in test_fst_ap_config_good
    raise Exception("hostapd didn't start with valid config parameters")
Exception: hostapd didn't start with valid config parameters
FAIL fst_ap_config_good 1.214574 2020-09-05 17:49:32.968016
passed 0 test case(s)
skipped 0 test case(s)
failed tests: fst_ap_config_good


To reproduce:

        git clone https://github.com/intel/lkp-tests.git
        cd lkp-tests
        bin/lkp install job.yaml  # job file is attached in this email
        bin/lkp run     job.yaml



Thanks,
Rong Chen