Hi~

I drive my bcm4312 by module b43 and firmware , learned from
http://linuxwireless.org/en/users/Drivers/b43
It is drive successfully, but when I start my openvpn , it looks like that
the kernel is crashed.

The kernel log :

[13446.745188] sched: RT throttling activated
[15653.842657] tun: Universal TUN/TAP device driver, 1.6
[15653.842661] tun: (C) 1999-2004 Max Krasnyansky <maxk@qualcomm.com>
[15653.843275] BUG: unable to handle kernel NULL pointer dereference
at           (null)
[15653.843282] IP: [<ffffffff815605c3>] __dev_get_by_name+0x73/0xd0
[15653.843289] PGD 169d8067 PUD 78dcb067 PMD 0
[15653.843294] Oops: 0000 [#1] SMP
[15653.843297] CPU 0
[15653.843299] Modules linked in: tun uvcvideo nvidia(P) b43 mac80211
i2c_i801 i2c_core intel_agp intel_gtt agpgart video bcma ssb ideapad_laptop
[last unloaded: uvcvideo]
[15653.843312]
[15653.843314] Pid: 9677, comm: openvpn Tainted: P           O
3.2.9-gentoo-Shelley #1 LENOVO                           IdeaPad
Y450                    /KL1
[15653.843321] RIP: 0010:[<ffffffff815605c3>]  [<ffffffff815605c3>]
__dev_get_by_name+0x73/0xd0
[15653.843325] RSP: 0018:ffff880016da3da8  EFLAGS: 00010246
[15653.843328] RAX: 0000000000000000 RBX: ffff8800798f08d0 RCX:
0000000000000000
[15653.843330] RDX: ffff880016da3e08 RSI: 0000000000000000 RDI:
ffff880016da3e08
[15653.843333] RBP: ffff880016da3dc8 R08: 0000000000000000 R09:
0000000000000000
[15653.843335] R10: 0000000000000000 R11: 0000000000000001 R12:
ffff880078a83400
[15653.843338] R13: ffff880016da3e08 R14: 00000000400454ca R15:
0000000000000028
[15653.843341] FS:  00007f0db5c4f700(0000) GS:ffff88007f600000(0000)
knlGS:0000000000000000
[15653.843343] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[15653.843346] CR2: 0000000000000000 CR3: 00000000169bf000 CR4:
00000000000406f0
[15653.843348] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[15653.843351] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7:
0000000000000400
[15653.843354] Process openvpn (pid: 9677, threadinfo ffff880016da2000,
task ffff88007bb4bb00)
[15653.843356] Stack:
[15653.843357]  0000000000000028 0000000000000000 ffff880078a83400
00007ffff2a50050
[15653.843362]  ffff880016da3e88 ffffffffa0014934 ffff880000000000
ffff880016da3e08
[15653.843367]  00000000ffffffff 00000000ffffffff 0000000000000000
ffff8800798f08d0
[15653.843372] Call Trace:
[15653.843377]  [<ffffffffa0014934>] __tun_chr_ioctl+0x154/0xc30 [tun]
[15653.843383]  [<ffffffff812b3ae1>] ? inode_has_perm.clone.23+0x21/0x30
[15653.843387]  [<ffffffff812b646a>] ? file_has_perm+0xba/0xc0
[15653.843391]  [<ffffffffa001544e>] tun_chr_ioctl+0xe/0x10 [tun]
[15653.843395]  [<ffffffff81172b66>] do_vfs_ioctl+0x96/0x540
[15653.843399]  [<ffffffff811730a1>] sys_ioctl+0x91/0xa0
[15653.843403]  [<ffffffff816c487b>] system_call_fastpath+0x16/0x1b
[15653.843405] Code: e8 04 48 01 c8 48 01 f0 48 39 fa 48 8d 0c 80 48 8d 34
48 75 db 69 f6 01 00 37 9e c1 ee 18 89 f6 48 c1 e6 03 48 8b 83 90 00 00 00
<48> 8b 1c 30 48 85 db 75 0c eb 32 66 90 48 8b 1b 48 85 db 74 28
[15653.843440] RIP  [<ffffffff815605c3>] __dev_get_by_name+0x73/0xd0
[15653.843444]  RSP <ffff880016da3da8>
[15653.843446] CR2: 0000000000000000
[15653.843448] ---[ end trace 2d6c431c15c6c2fd ]---
[17540.211037] ieee80211 phy0: wlan0: No probe response from AP
00:27:19:33:2e:be after 500ms, disconnecting.
[17540.219257] cfg80211: Calling CRDA to update world regulatory domain


# lsmod
Module                  Size  Used by
b43                   171090  0
mac80211              184305  1 b43
bcma                   20076  1 b43
ssb                    41892  1 b43
nvidia              12229445  43
intel_agp              10560  0
intel_gtt              14263  1 intel_agp
agpgart                26135  3 nvidia,intel_agp,intel_gtt
i2c_i801                7998  0
video                  11043  0
uvcvideo               62879  0
i2c_core               18050  2 nvidia,i2c_i801
ideapad_laptop          8339  0


Thank you for any reply!