Greeting, FYI, we noticed the following commit (built with gcc-9): commit: bedd7904e86c02ae80513c212ea25789d8bf4fb4 ("mac80211_hwsim: Advertise support for multicast RX registration") https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master in testcase: hwsim with following parameters: group: hwsim-15 on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G 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(a)intel.com&gt; 2020-07-10 21:43:28 ./run-tests.py dpp_configurator_enrollee_secp384r1 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 dpp_configurator_enrollee_secp384r1 1/1 Test: DPP Configurator enrolling (secp384r1) dev0 displays QR Code dev1 scans QR Code and initiates DPP Authentication DPP authentication did not succeed (Responder) Traceback (most recent call last): File "./run-tests.py", line 533, in main t(dev, apdev) File "/lkp/benchmarks/hwsim/tests/hwsim/test_dpp.py", line 288, in test_dpp_configurator_enrollee_secp384r1 run_dpp_configurator_enrollee(dev, apdev, conf_curve="secp384r1") File "/lkp/benchmarks/hwsim/tests/hwsim/test_dpp.py", line 273, in run_dpp_configurator_enrollee conf="configurator") File "/lkp/benchmarks/hwsim/tests/hwsim/test_dpp.py", line 358, in run_dpp_qr_code_auth_unicast stop_responder=True) File "/lkp/benchmarks/hwsim/tests/hwsim/test_dpp.py", line 3815, in wait_auth_success raise Exception("DPP authentication did not succeed (Responder)") Exception: DPP authentication did not succeed (Responder) FAIL dpp_configurator_enrollee_secp384r1 5.14934 2020-07-10 21:43:34.523196 passed 0 test case(s) skipped 0 test case(s) failed tests: dpp_configurator_enrollee_secp384r1 To reproduce: # build kernel cd linux cp config-5.7.0-rc1-00402-gbedd7904e86c0 .config make HOSTCC=gcc-9 CC=gcc-9 ARCH=x86_64 olddefconfig prepare modules_prepare bzImage git clone https://github.com/intel/lkp-tests.git cd lkp-tests bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email Thanks, Rong Chen