wl kernel module on BCM4313 causes kernel taint on boot

Lenovo ideapad with BCM4313, upgrade to 13.04
12.10 used drivers bcma, brcmsmac
13.04 chooses kernel module wl, package bcmwl-kernel-source, 6.20.155.1+bdcom-0ubuntu2

This causes exception on boot
Therefore network fails to launch
Therefore many commands hang: sudo ifconfig ctrl-alt-f2, computer hangs on shutdown

get-around:
in grub, select advanced options, then reccovery
in menu select root
at #:
mount -o remount,rw /
echo "blacklist wl" >>/etc/modprobe.d/blacklist.conf
shutdown -r now

The computer reboots without Wi-Fi

here's what appears in syslog on boot:
Jan 8 06:33:11 s10t kernel: [ 22.907462] ------------[ cut here ]------------
Jan 8 06:33:11 s10t kernel: [ 22.907589] Kernel BUG at f8df288a [verbose debug info unavailable]
Jan 8 06:33:11 s10t kernel: [ 22.907712] invalid opcode: 0000 [#1] SMP
Jan 8 06:33:11 s10t kernel: [ 22.907810] Modules linked in: bnep rfcomm bluetooth parport_pc(F) ppdev(F) snd_hda_codec_conexant uvcvideo snd_hda_intel snd_hda_codec coretemp videobuf2_vmalloc lib80211_crypt_tkip videobuf2_memops wl(POF) joydev(F) snd_hwdep(F) videobuf2_core snd_pcm(F) videodev snd_page_alloc(F) hid_multitouch i915 snd_seq_midi(F) snd_seq_midi_event(F) snd_rawmidi(F) snd_seq(F) lib80211 snd_seq_device(F) drm_kms_helper snd_timer(F) microcode(F) cfg80211 ideapad_laptop psmouse(F) drm lpc_ich serio_raw(F) i2c_algo_bit sparse_keymap snd(F) wmi video(F) soundcore(F) mac_hid lp(F) parport(F) binfmt_misc(F) hid_generic usbhid hid tg3
Jan 8 06:33:11 s10t kernel: [ 22.909148] Pid: 974, comm: wpa_supplicant Tainted: PF O 3.7.0-7-generic #15-Ubuntu LENOVO 20040M18 /Caucasus2
Jan 8 06:33:11 s10t kernel: [ 22.909148] EIP: 0060:[<f8df288a>] EFLAGS: 00210246 CPU: 0
Jan 8 06:33:11 s10t kernel: [ 22.909148] EIP is at wl_cfg80211_scan+0x2da/0x340 [wl]
Jan 8 06:33:11 s10t kernel: [ 22.909148] EAX: 00000000 EBX: f6272e00 ECX: f8fa6a40 EDX: f6284200
Jan 8 06:33:11 s10t kernel: [ 22.909148] ESI: 00000000 EDI: f6188120 EBP: f6c77c24 ESP: f6c77c00
Jan 8 06:33:11 s10t kernel: [ 22.909148] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
Jan 8 06:33:11 s10t kernel: [ 22.909148] CR0: 80050033 CR2: 080e8380 CR3: 34c2d000 CR4: 000007f0
Jan 8 06:33:11 s10t kernel: [ 22.909148] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
Jan 8 06:33:11 s10t kernel: [ 22.909148] DR6: ffff0ff0 DR7: 00000400
Jan 8 06:33:11 s10t kernel: [ 22.909148] Process wpa_supplicant (pid: 974, ti=f6c76000 task=f5601960 task.ti=f6c76000)
Jan 8 06:33:11 s10t kernel: [ 22.909148] Stack:
Jan 8 06:33:11 s10t kernel: [ 22.909148] 0000827b f6284800 f872f238 00000119 f6284200 00000200 f6272e00 00000000
Jan 8 06:33:11 s10t kernel: [ 22.909148] f6188120 f6c77c58 f872f548 ffffffff 00000033 00000003 f6272e00 f6188120
Jan 8 06:33:11 s10t kernel: [ 22.909148] f6188000 f6c77c84 f6284200 f873d200 f873d660 f8725910 f6c77cb4 c15225fd
Jan 8 06:33:11 s10t kernel: [ 22.909148] Call Trace:
Jan 8 06:33:11 s10t kernel: [ 22.909148] [<f872f238>] ? nl80211_trigger_scan+0xc8/0x560 [cfg80211]
Jan 8 06:33:11 s10t kernel: [ 22.909148] [<f872f548>] nl80211_trigger_scan+0x3d8/0x560 [cfg80211]
Jan 8 06:33:11 s10t kernel: [ 22.909148] [<f8725910>] ? __cfg80211_rdev_from_attrs+0x160/0x160 [cfg80211]
Jan 8 06:33:11 s10t kernel: [ 22.909148] [<c15225fd>] genl_rcv_msg+0x22d/0x290
Jan 8 06:33:11 s10t kernel: [ 22.909148] [<c15223d0>] ? genl_rcv+0x30/0x30
Jan 8 06:33:11 s10t kernel: [ 22.909148] [<c1521ff6>] netlink_rcv_skb+0x86/0xa0
Jan 8 06:33:11 s10t kernel: [ 22.909148] [<c15223bc>] genl_rcv+0x1c/0x30
Jan 8 06:33:11 s10t kernel: [ 22.909148] [<c15219a7>] netlink_unicast+0x167/0x1e0
Jan 8 06:33:11 s10t kernel: [ 22.909148] [<c1521c49>] netlink_sendmsg+0x229/0x390
Jan 8 06:33:11 s10t kernel: [ 22.909148] [<c14eba24>] sock_sendmsg+0xa4/0xd0
Jan 8 06:33:11 s10t kernel: [ 22.909148] [<c14ebce9>] __sys_sendmsg+0x299/0x2b0
Jan 8 06:33:11 s10t kernel: [ 22.909148] [<c141276f>] ? ata_qc_complete+0x7f/0x1e0
Jan 8 06:33:11 s10t kernel: [ 22.909148] [<c1412948>] ? ata_qc_complete_multiple+0x78/0xd0
Jan 8 06:33:11 s10t kernel: [ 22.909148] [<c1019225>] ? fpu_finit+0x55/0x70
Jan 8 06:33:11 s10t kernel: [ 22.909148] [<c10439d7>] ? kmap_atomic_prot+0xe7/0x100
Jan 8 06:33:11 s10t kernel: [ 22.909148] [<c10cc1ff>] ? handle_irq_event_percpu+0x9f/0x1d0
Jan 8 06:33:11 s10t kernel: [ 22.909148] [<c14ecd1b>] sys_sendmsg+0x3b/0x60
Jan 8 06:33:11 s10t kernel: [ 22.909148] [<c14ed3b3>] sys_socketcall+0x273/0x2d0
Jan 8 06:33:11 s10t kernel: [ 22.909148] [<c12e5971>] ? copy_to_user+0x41/0x60
Jan 8 06:33:11 s10t kernel: [ 22.909148] [<c105136a>] ? sys_gettimeofday+0x2a/0x70
Jan 8 06:33:11 s10t kernel: [ 22.909148] [<c15f9b4d>] sysenter_do_call+0x12/0x28
Jan 8 06:33:11 s10t kernel: [ 22.909148] Code: ff c6 03 00 8d 7b 01 66 be 43 00 e9 96 fd ff ff 90 66 c7 07 00 00 83 ee 02 83 c7 02 e9 91 fd ff ff be ea ff ff ff e9 8f fe ff ff <0f> 0b c7 44 24 04 9d 22 f6 f8 c7 04 24 3a 5a f6 f8 e8 37 5c 7f
Jan 8 06:33:11 s10t kernel: [ 22.909148] EIP: [<f8df288a>] wl_cfg80211_scan+0x2da/0x340 [wl] SS:ESP 0068:f6c77c00
Jan 8 06:33:11 s10t kernel: [ 22.952216] ---[ end trace 35dfcd51e9e5bbb6 ]---

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: bcmwl-kernel-source 6.20.155.1+bdcom-0ubuntu2
ProcVersionSignature: Ubuntu 3.7.0-7.15-generic 3.7.0
Uname: Linux 3.7.0-7-generic i686
ApportVersion: 2.7-0ubuntu2
Architecture: i386
Date: Tue Jan 8 14:56:56 2013
MarkForUpload: True
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: bcmwl
UpgradeStatus: Upgraded to raring on 2013-01-08 (0 days ago)