FYI, we noticed the following commit (built with gcc-6):

commit: 52f9c100b17e1d5d9696366d7401d14d3fd9c05c ("[PATCH] nl80211: require and validate vendor command policy")
url: https://github.com/0day-ci/linux/commits/Johannes-Berg/nl80211-require-and-validate-vendor-command-policy/20190529-190226
base: https://git.kernel.org/cgit/linux/kernel/git/jberg/mac80211.git master

in testcase: trinity
with following parameters:

	runtime: 300s

test-description: Trinity is a linux system call fuzz tester.
test-url: http://codemonkey.org.uk/projects/trinity/


on test machine: qemu-system-i386 -enable-kvm -cpu SandyBridge -smp 2 -m 2G

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


+------------------------------------------------+------------+------------+
|                                                | 551842446e | 52f9c100b1 |
+------------------------------------------------+------------+------------+
| boot_successes                                 | 7          | 0          |
| boot_failures                                  | 1          | 8          |
| BUG:soft_lockup-CPU##stuck_for#s               | 1          |            |
| EIP:_raw_spin_unlock_irqrestore                | 1          |            |
| Kernel_panic-not_syncing:softlockup:hung_tasks | 1          |            |
| WARNING:at_net/wireless/core.c:#wiphy_register | 0          | 8          |
| EIP:wiphy_register                             | 0          | 8          |
+------------------------------------------------+------------+------------+


If you fix the issue, kindly add following tag
Reported-by: kernel test robot <rong.a.chen@intel.com>


[   42.418616] WARNING: CPU: 1 PID: 1 at net/wireless/core.c:867 wiphy_register+0x6e8/0x950
[   42.427495] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 5.1.0-10250-g52f9c10 #1
[   42.427495] EIP: wiphy_register+0x6e8/0x950
[   42.427495] Code: 74 8b 86 5c 03 00 00 8b 50 14 85 d2 74 1c 83 c0 0c 31 d2 8b 38 85 ff 74 49 83 c2 01 39 ca 74 55 83 c0 1c 8b 58 08 85 db 75 e9 <0f> 0b bb ea ff ff ff e9 0c fa ff ff 8d 74 26 00 0f 0b bb ea ff ff
[   42.427495] EAX: c3377d4c EBX: c2cdcdba ECX: 00000001 EDX: 00000000
[   42.427495] ESI: ee5f42e0 EDI: 00000003 EBP: c004be5c ESP: c004be04
[   42.427495] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 EFLAGS: 00010246
[   42.427495] CR0: 80050033 CR2: ffffffff CR3: 034fd000 CR4: 000006b0
[   42.427495] Call Trace:
[   42.427495]  ieee80211_register_hw+0x446/0xc00
[   42.427495]  mac80211_hwsim_new_radio+0x7c0/0xe20
[   42.427495]  init_mac80211_hwsim+0x15c/0x2c5
[   42.427495]  ? wl3501_driver_init+0xf/0xf
[   42.427495]  do_one_initcall+0x7b/0x148
[   42.427495]  kernel_init_freeable+0x16a/0x1e5
[   42.427495]  ? rest_init+0x120/0x120
[   42.427495]  kernel_init+0x8/0xf0
[   42.427495]  ret_from_fork+0x1e/0x28
[   42.427495] random: get_random_bytes called from print_oops_end_marker+0x4f/0x60 with crng_init=0
[   42.427495] ---[ end trace ca67d517de3b21fc ]---


To reproduce:

        # build kernel
	cd linux
	cp config-5.1.0-10250-g52f9c10 .config
	make HOSTCC=gcc-6 CC=gcc-6 ARCH=i386 olddefconfig
	make HOSTCC=gcc-6 CC=gcc-6 ARCH=i386 prepare
	make HOSTCC=gcc-6 CC=gcc-6 ARCH=i386 modules_prepare
	make HOSTCC=gcc-6 CC=gcc-6 ARCH=i386 SHELL=/bin/bash
	make HOSTCC=gcc-6 CC=gcc-6 ARCH=i386 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