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[Andreas Steffan <1315912@xxxxxxxxxxxxxxxxxx>]

I am on utopic now. I bought myself a USB-Wifi dongle  to get around
this problem,  and just started using the sta driver again.  Will report
back soon what the current situation is like.

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https://bugs.launchpad.net/bugs/1315912

Title:
  Broadcom Sta/wl Drivers causes (more) kernel panic

Status in “bcmwl” package in Ubuntu:
  Incomplete

Bug description:
  I am running latest 14.04  on a Dell Precision M4800 which has the
  following  broadcom adapter:

    *-network
         description: Wireless interface
         product: BCM4352 802.11ac Wireless Network Adapter
         vendor: Broadcom Corporation
         physical id: 0
         bus info: pci@0000:03:00.0
         logical name: wlan3
         version: 03
         serial: 40:f0:2f:ee:24:99
         width: 64 bits
         clock: 33MHz
         capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
         configuration: broadcast=yes driver=wl0 driverversion=6.30.223.141 (r415941) ip=192.168.178.40 latency=0 multicast=yes wireless=IEEE 802.11abg
         resources: irq:18 memory:f5e00000-f5e07fff memory:f5c00000-f5dfffff

  I am running the latest sta driver (6.30.223.141 ) and I am frequently
  seeing the following kernel panic:

  May  2 08:35:23 bruce kernel: [324529.882363] WARNING: CPU: 0 PID: 1184 at /build/buildd/linux-3.13.0/net/wireless/sme.c:797 cfg80211_roamed+0x89/0x90 [cfg80211]()
  May  2 08:35:23 bruce kernel: [324529.882367] Modules linked in: md4 nls_utf8 cifs veth xt_addrtype aufs michael_mic arc4 xt_multiport pci_stub vboxpci(OF) vboxnetadp(OF) vboxnetflt(OF) vboxdrv(OF) nfnetlink_queue nfnetlink_log nfnetlink xt_conntrack ipt_REJECT ip6table_filter ip6_tables ebtable_nat ebtables xt_CHECKSUM iptable_mangle ipt_MASQUERADE iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack xt_tcpudp bridge stp llc iptable_filter ip_tables x_tables autofs4 deflate ctr twofish_generic twofish_avx_x86_64 twofish_x86_64_3way twofish_x86_64 twofish_common camellia_generic camellia_aesni_avx2 camellia_aesni_avx_x86_64 camellia_x86_64 serpent_avx2 serpent_avx_x86_64 serpent_sse2_x86_64 xts serpent_generic blowfish_generic blowfish_x86_64 blowfish_common cast5_avx_x86_64 cast5_generic cast_common des_generic cmac xcbc rmd160 crypto_null af_key xfrm_algo dm_crypt dell_wmi sparse_keymap dell_laptop dcdbas uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core videodev x86_pkg_temp_thermal intel_powerclamp coretemp snd_hda_codec_realtek kvm_intel psmouse kvm crct10dif_pclmul crc32_pclmul serio_raw ghash_clmulni_intel aesni_intel btusb aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd lib80211_crypt_tkip joydev dm_multipath scsi_dh snd_hda_codec_hdmi wl(POF) lib80211 bnep rfcomm bluetooth cfg80211 snd_hda_intel lpc_ich snd_hda_codec snd_hwdep snd_pcm snd_page_alloc snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device snd_timer snd mac_hid mei_me soundcore mei parport_pc ppdev lp parport nfsd auth_rpcgss nfs_acl nfs binfmt_misc lockd sunrpc fscache raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq raid1 raid0 multipath linear hid_generic usbhid hid radeon i915 ttm i2c_algo_bit drm_kms_helper e1000e drm ahci sdhci_pci ptp libahci sdhci pps_core wmi video
  May  2 08:35:23 bruce kernel: [324529.882597] CPU: 0 PID: 1184 Comm: wl_event_handle Tainted: PF       W  O 3.13.0-24-generic #46-Ubuntu
  May  2 08:35:23 bruce kernel: [324529.882601] Hardware name: Dell Inc. Precision M4800/0FVDR2, BIOS A06 01/02/2014
  May  2 08:35:23 bruce kernel: [324529.882604]  0000000000000009 ffff8807fed11dd0 ffffffff81715a64 0000000000000000
  May  2 08:35:23 bruce kernel: [324529.882613]  ffff8807fed11e08 ffffffff810676bd ffff8807fb73e000 ffff8806ba484a80
  May  2 08:35:23 bruce kernel: [324529.882620]  000000000000009e ffff8806ba4846c0 ffff8807fb73a9f8 ffff8807fed11e18
  May  2 08:35:23 bruce kernel: [324529.882628] Call Trace:
  May  2 08:35:23 bruce kernel: [324529.882642]  [<ffffffff81715a64>] dump_stack+0x45/0x56
  May  2 08:35:23 bruce kernel: [324529.882652]  [<ffffffff810676bd>] warn_slowpath_common+0x7d/0xa0
  May  2 08:35:23 bruce kernel: [324529.882659]  [<ffffffff8106779a>] warn_slowpath_null+0x1a/0x20
  May  2 08:35:23 bruce kernel: [324529.882691]  [<ffffffffa0678509>] cfg80211_roamed+0x89/0x90 [cfg80211]
  May  2 08:35:23 bruce kernel: [324529.882779]  [<ffffffffa08d540c>] wl_notify_roaming_status+0xac/0x130 [wl]
  May  2 08:35:23 bruce kernel: [324529.882859]  [<ffffffffa08d4135>] wl_event_handler+0x55/0x220 [wl]
  May  2 08:35:23 bruce kernel: [324529.882955]  [<ffffffffa08d40e0>] ? wl_get_assoc_ies+0x240/0x240 [wl]
  May  2 08:35:23 bruce kernel: [324529.882966]  [<ffffffff8108b312>] kthread+0xd2/0xf0
  May  2 08:35:23 bruce kernel: [324529.882974]  [<ffffffff8108b240>] ? kthread_create_on_node+0x1d0/0x1d0
  May  2 08:35:23 bruce kernel: [324529.882983]  [<ffffffff8172637c>] ret_from_fork+0x7c/0xb0
  May  2 08:35:23 bruce kernel: [324529.882990]  [<ffffffff8108b240>] ? kthread_create_on_node+0x1d0/0x1d0
  May  2 08:35:23 bruce kernel: [324529.882995] ---[ end trace d6a0b4881a830805 ]---
  May  2 08:35:27 bruce kernel: [324533.855941] cfg80211: Calling CRDA to update world regulatory domain
  May  2 08:35:27 bruce kernel: [324533.863198] cfg80211: World regulatory domain updated:
  May  2 08:35:27 bruce kernel: [324533.863206] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
  May  2 08:35:27 bruce kernel: [324533.863211] cfg80211:   (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
  May  2 08:35:27 bruce kernel: [324533.863215] cfg80211:   (2457000 KHz - 2482000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
  May  2 08:35:27 bruce kernel: [324533.863219] cfg80211:   (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
  May  2 08:35:27 bruce kernel: [324533.863222] cfg80211:   (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
  May  2 08:35:27 bruce kernel: [324533.863226] cfg80211:   (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)

  All in all, my issue looks somewhat similiar to #1134389 .

  Googling "dump_stack wl_notify_roaming_status" yielded
  https://retrace.fedoraproject.org/faf/problems/1104850/ so it seems
  few other people are affected as well.

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