Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v4.8 kernel[0].

If this bug is fixed in the mainline kernel, please add the following
tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag:

Once testing of the upstream kernel is complete, please mark this bug as

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.8

** Changed in: linux (Ubuntu)
   Importance: Undecided => Medium

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  WARNING: CPU: 1 PID: 19147 at /build/linux-
  __cfg80211_connect_result+0x3b2/0x420 [cfg80211]()

Status in linux package in Ubuntu:

Bug description:
  ------------[ cut here ]------------
  WARNING: CPU: 1 PID: 19147 at 
__cfg80211_connect_result+0x3b2/0x420 [cfg80211]()
  Modules linked in: cpuid vhost_net vhost macvtap macvlan rfcomm xt_CHECKSUM 
iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 
nf_nat nf_conntrack_ipv4 
  t_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp bridge stp llc 
ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter ip_tables 
x_tables bnep binfmt_misc 
  cmfmac x86_pkg_temp_thermal intel_powerclamp coretemp applesmc brcmutil 
snd_hda_codec_hdmi input_polldev mei_me btusb btrtl snd_hda_codec_cirrus btbcm 
snd_hda_codec_generic btint
  tooth bdc_pci lpc_ich snd_hda_intel snd_hda_codec snd_hda_core mei snd_hwdep 
snd_pcm joydev snd_seq_midi snd_seq_midi_event input_leds snd_rawmidi snd_seq 
bcm5974 snd_seq_device 
  underbolt shpchp soundcore
   acpi_als sbs sbshc kfifo_buf industrialio apple_gmux apple_bl mac_hid 
kvm_intel kvm irqbypass parport_pc ppdev lp parport autofs4 jitterentropy_rng 
drbg ansi_cprng algif_skciphe
  t hid_apple hid_generic usbhid hid i915 crct10dif_pclmul crc32_pclmul 
aesni_intel aes_x86_64 lrw i2c_algo_bit gf128mul glue_helper drm_kms_helper 
ablk_helper cryptd syscopyarea s
  gblt fb_sys_fops uas tg3 drm usb_storage ptp pps_core ahci libahci video fjes
  CPU: 1 PID: 19147 Comm: kworker/u16:8 Not tainted 4.4.0-38-generic #57-Ubuntu
  Hardware name: Apple Inc. MacBookPro11,4/Mac-06F11FD93F0323C5, BIOS 
MBP114.88Z.0172.B04.1506051511 06/05/2015
  Workqueue: cfg80211 cfg80211_event_work [cfg80211]
   0000000000000286 000000007bbced25 ffff880171657ca0 ffffffff813f1b73
   0000000000000000 ffffffffc0736bd0 ffff880171657cd8 ffffffff810811c2
   ffff8800351db008 0000000000000000 0000000000000000 ffff8800351dc000
  Call Trace:
   [<ffffffff813f1b73>] dump_stack+0x63/0x90
   [<ffffffff810811c2>] warn_slowpath_common+0x82/0xc0
   [<ffffffff8108130a>] warn_slowpath_null+0x1a/0x20
   [<ffffffffc07141c2>] __cfg80211_connect_result+0x3b2/0x420 [cfg80211]
   [<ffffffffc06eb46f>] cfg80211_process_wdev_events+0x13f/0x1b0 [cfg80211]
   [<ffffffffc06eb512>] cfg80211_process_rdev_events+0x32/0x70 [cfg80211]
   [<ffffffffc06e601e>] cfg80211_event_work+0x1e/0x30 [cfg80211]
   [<ffffffff8109a395>] process_one_work+0x165/0x480
   [<ffffffff8109a6fb>] worker_thread+0x4b/0x4c0
   [<ffffffff8109a6b0>] ? process_one_work+0x480/0x480
   [<ffffffff8109a6b0>] ? process_one_work+0x480/0x480
   [<ffffffff810a08d8>] kthread+0xd8/0xf0
   [<ffffffff810a0800>] ? kthread_create_on_node+0x1e0/0x1e0
   [<ffffffff81830a8f>] ret_from_fork+0x3f/0x70
   [<ffffffff810a0800>] ? kthread_create_on_node+0x1e0/0x1e0
  ---[ end trace 2f840cd465c67bb2 ]---

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