Public bug reported:

The kernel spits out  the following:
[  518.240111] ------------[ cut here ]------------
[  518.240138] WARNING: at /build/buildd/linux-3.2.0/net/wireless/sme.c:586 
__cfg80211_roamed+0x243/0x260 [cfg80211]()
[  518.240146] Hardware name: HP Compaq 6720s
[  518.240148] Modules linked in: michael_mic arc4 dm_crypt bnep bluetooth 
parport_pc nfsd lib80211_crypt_tkip ppdev nfs lockd wl(P) fscache auth_rpcgss 
binfmt_misc nfs_acl sunrpc snd_hda_codec_analog snd_hda_intel snd_hda_codec 
snd_hwdep snd_pcm snd_seq_midi snd_rawmidi snd_seq_midi_event hp_wmi joydev 
sparse_keymap snd_seq snd_timer snd_seq_device cfg80211 snd soundcore psmouse 
snd_page_alloc serio_raw lib80211 mac_hid lp parport i915 drm_kms_helper drm 
e1000e i2c_algo_bit wmi video
[  518.240189] Pid: 5, comm: kworker/u:0 Tainted: P        W  O 
3.2.0-36-generic #57-Ubuntu
[  518.240192] Call Trace:
[  518.240202]  [<ffffffff81067f0f>] warn_slowpath_common+0x7f/0xc0
[  518.240206]  [<ffffffff81067f6a>] warn_slowpath_null+0x1a/0x20
[  518.240216]  [<ffffffffa01823d3>] __cfg80211_roamed+0x243/0x260 [cfg80211]
[  518.240226]  [<ffffffffa0168ea2>] cfg80211_process_wdev_events+0x1b2/0x1e0 
[cfg80211]
[  518.240234]  [<ffffffffa01661e0>] ? wiphy_unregister+0x1d0/0x1d0 [cfg80211]
[  518.240242]  [<ffffffffa0168f20>] cfg80211_process_rdev_events+0x50/0x90 
[cfg80211]
[  518.240250]  [<ffffffffa0166215>] cfg80211_event_work+0x35/0x60 [cfg80211]
[  518.240260]  [<ffffffff81085c3a>] process_one_work+0x11a/0x480
[  518.240265]  [<ffffffff810869f4>] worker_thread+0x164/0x370
[  518.240269]  [<ffffffff81086890>] ? manage_workers.isra.31+0x130/0x130
[  518.240274]  [<ffffffff8108b27c>] kthread+0x8c/0xa0
[  518.240279]  [<ffffffff81667b74>] kernel_thread_helper+0x4/0x10
[  518.240283]  [<ffffffff8108b1f0>] ? flush_kthread_worker+0xa0/0xa0
[  518.240287]  [<ffffffff81667b70>] ? gs_change+0x13/0x13
[  518.240289] ---[ end trace 85de0d28e5b81592 ]---
[  519.772023] ------------[ cut here ]------------

Ubuntu release:
Description:    Ubuntu 12.04.2 LTS
Release:        12.04

This same bug also occurs on Linux 3.2.0-37-generic, but I booted the
previous kernel to check whether this crash would still occur.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: wireless-regdb 2011.04.28-1ubuntu3
ProcVersionSignature: Ubuntu 3.2.0-36.57-generic 3.2.35
Uname: Linux 3.2.0-36-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.0.1-0ubuntu17.1
Architecture: amd64
Date: Sun Feb 10 13:29:18 2013
Dependencies:
 
InstallationMedia: Kubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101008)
MarkForUpload: True
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: wireless-regdb
UpgradeStatus: Upgraded to precise on 2012-04-27 (288 days ago)

** Affects: wireless-regdb (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug precise

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https://bugs.launchpad.net/bugs/1121137

Title:
  Wireless driver crash on HP Compaq 6720s laptop

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