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 atÂ*Â*Â*Â*Â*Â*Â*Â*Â*Â* (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: PÂ*Â*Â*Â*Â*Â*Â*Â*Â*Â* O 3.2.9-gentoo-Shelley #1 LENOVOÂ*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â* Â*Â*Â*Â* IdeaPad Y450Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â* /KL1Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â *Â*Â*Â*Â*

[15653.843321] RIP: 0010:[<ffffffff815605c3>]Â* [<ffffffff815605c3>] __dev_get_by_name+0x73/0xd0
[15653.843325] RSP: 0018:ffff880016da3da8Â* 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:Â* 00007f0db5c4f700(0000) GS:ffff88007f600000(0000) knlGS:0000000000000000
[15653.843343] CS:Â* 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]Â* 0000000000000028 0000000000000000 ffff880078a83400 00007ffff2a50050
[15653.843362]Â* ffff880016da3e88 ffffffffa0014934 ffff880000000000 ffff880016da3e08

[15653.843367]Â* 00000000ffffffff 00000000ffffffff 0000000000000000 ffff8800798f08d0
[15653.843372] Call Trace:
[15653.843377]Â* [<ffffffffa0014934>] __tun_chr_ioctl+0x154/0xc30 [tun]
[15653.843383]Â* [<ffffffff812b3ae1>] ? inode_has_perm.clone.23+0x21/0x30

[15653.843387]Â* [<ffffffff812b646a>] ? file_has_perm+0xba/0xc0
[15653.843391]Â* [<ffffffffa001544e>] tun_chr_ioctl+0xe/0x10 [tun]
[15653.843395]Â* [<ffffffff81172b66>] do_vfs_ioctl+0x96/0x540
[15653.843399]Â* [<ffffffff811730a1>] sys_ioctl+0x91/0xa0

[15653.843403]Â* [<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] RIPÂ* [<ffffffff815605c3>] __dev_get_by_name+0x73/0xd0
[15653.843444]Â* 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
ModuleÂ*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â* SizeÂ* Used by

b43Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â* 171090Â* 0
mac80211Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â* 184305Â* 1 b43
bcmaÂ*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â* 20076Â* 1 b43
ssbÂ*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â* 41892Â* 1 b43
nvidiaÂ*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â* 12229445Â* 43
intel_agpÂ*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â* 10560Â* 0

intel_gttÂ*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â* 14263Â* 1 intel_agp
agpgartÂ*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â* 26135Â* 3 nvidia,intel_agp,intel_gtt
i2c_i801Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â* 7998Â* 0
videoÂ*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â* 11043Â* 0
uvcvideoÂ*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â* 62879Â* 0
i2c_coreÂ*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â* 18050Â* 2 nvidia,i2c_i801

ideapad_laptopÂ*Â*Â*Â*Â*Â*Â*Â*Â* 8339Â* 0


Thank you for any reply!

On 03/18/2012 02:29 AM, 林守磊 wrote:
> 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 <mailto:maxk@qualcomm.com>>
> [15653.843275] BUG: unable to handle kernel NULL pointer dereference at (null)

That's a bug in the kernel, so my first step would be to try the most recent
kernel, hoping that the bug has already been fixed upstream. If the most
recent kernel crashes the same way, then I would try older kernels, hoping
to find where the bug first appeared.

> [15653.843314] Pid: 9677, comm: openvpn Tainted: P O 3.2.9-gentoo-Shelley #1 LENOVO IdeaPad Y450 /KL1

The word "Tainted" refers to your nvidia driver (see below). Some kernel
developers may refuse to accept a bug report if they see the word "Tainted",
but I've never had a bug report refused for that reason. You can get rid
of the "Tainted" by using an open-source driver like nouveau or the old 'nv'
if you have trouble getting a bug report accepted by a kernel developer.

> # lsmod
> Module Size Used by
> nvidia 12229445 43