FYI, we noticed the following commit (built with gcc-7):

commit: 83db2c9ebd071566d3b45e4860b9803dfc36d1ca ("[PATCH 06/11] cfg80211: don't skip multi-bssid index element")
url: https://github.com/0day-ci/linux/commits/Luca-Coelho/mac80211-Increase-MAX_MSG_LEN/20190316-083719
base: https://git.kernel.org/cgit/linux/kernel/git/jberg/mac80211-next.git master

in testcase: hwsim
with following parameters:

	group: hwsim-12



on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 4G

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


2019-03-25 02:31:59 	./run-tests.py scan_multi_bssid_check_ie 
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 scan_multi_bssid_check_ie 1/1
Test: Scan and check if nontransmitting BSS inherits IE from transmitting BSS
Starting AP wlan3
trans_bss beacon_ie: [0, 1, 3, 5, 71, 42, 45, 221, 50, 59, 61, 127]
nontrans_bss1 beacon_ie: [0, 1, 3, 5, 42, 45, 221, 50, 85, 59, 61, 127]
check IE failed
Traceback (most recent call last):
  File "./run-tests.py", line 466, in main
    t(dev, apdev)
  File "/lkp/benchmarks/hwsim/tests/hwsim/test_scan.py", line 1703, in test_scan_multi_bssid_check_ie
    raise Exception("check IE failed")
Exception: check IE failed
FAIL scan_multi_bssid_check_ie 0.671182 2019-03-25 02:32:01.152626
passed 0 test case(s)
skipped 0 test case(s)
failed tests: scan_multi_bssid_check_ie



To reproduce:

        # build kernel
	cd linux
	cp config-5.0.0-rc7-02371-g83db2c9 .config
	make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 olddefconfig
	make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 prepare
	make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 modules_prepare
	make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 SHELL=/bin/bash
	make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 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