Re: NULL pointer dereference

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Hello Bjorn,
I have ALSA 1.0.20, the package i've used right now is
agrsm-11c11040-2.1.80~20091225.tar.bz2
I've used dodkms and a kernel i didn't use before (2.6.31-16-generic).
I've booted into that kernel, ran twice Marv's unloading script (if i
run it twice it unloads more):

MODULES_FINAL=isofs binfmt_misc joydev psmouse fbcon tileblit font
bitblit softcursor i915 drm i2c_algo_bit intel_agp agpgart video
output

then loaded agrmodem and agrserial:
[  112.493879] * Hello Agere Driver **
[  112.493950] usbcore: registered new interface driver agr12dec2006
[  112.970170]   alloc irq_desc for 20 on node -1
[  112.970174]   alloc kstat_irqs on node -1
[  112.970182] pci 0000:00:1b.0: PCI INT A -> GSI 20 (level, low) -> IRQ 20
[  115.917518] Loading module Agere Modem Controller driver version
2.1.80 (2007-10-01)
[  115.917525] Disabling lock debugging due to kernel taint
[  123.858338] serial8250_register_ports: BaseAddress 0x8004 Irq 20
[  123.858350] ttyAGS3 at I/O 0x8004 (irq = 20) is a AgereModem
[  123.858455] agrserial - ret_val 0, call: lt_modem_ops.init_modem
[  123.858463] Loading module Agere Modem Interface driver version
2.1.80.0 (2007-10-01)

(is this rev_val 0 line normal?)
Made a symlink /dev/modem to /dev/ttyAGS3 and /dev/ttySAGS to
/dev/ttyAGS3 (i think i read somewhere to do this for wvdialconf to
find the modem).

Ran sudo wvdialconf /etc/wvdial.conf (instead of wvdial this time) and got this:

[  181.005484] ==> codecType = 0x32
[  181.005512] BUG: unable to handle kernel NULL pointer dereference at 00000168
[  181.005523] IP: [<f8f68818>] azlGetResourceInformation+0x8/0x60 [agrmodem]
[  181.005592] *pde = 7f322067
[  181.005599] Oops: 0000 [#1] SMP
[  181.005607] last sysfs file: /sys/devices/system/cpu/cpu1/topology/core_id
[  181.005614] Modules linked in: agrserial agrmodem snd_hda_codec
snd_hwdep snd_pcm_oss snd_mixer_oss snd_pcm snd_seq_dummy snd_seq_oss
snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer
snd_seq_device snd soundcore snd_page_alloc isofs binfmt_misc joydev
psmouse fbcon tileblit font bitblit softcursor i915 drm i2c_algo_bit
intel_agp agpgart video output [last unloaded: wlan]
[  181.005692]
[  181.005701] Pid: 5655, comm: wvdialconf Tainted: P
(2.6.31-16-generic #53-Ubuntu) MSI Notebook VR601
[  181.005708] EIP: 0060:[<f8f68818>] EFLAGS: 00010286 CPU: 0
[  181.005766] EIP is at azlGetResourceInformation+0x8/0x60 [agrmodem]
[  181.005773] EAX: 00000000 EBX: f86af0c4 ECX: 00000000 EDX: 0000020b
[  181.005779] ESI: f86af0c4 EDI: f86af028 EBP: f02efd00 ESP: f02efd00
[  181.005785]  DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
[  181.005792] Process wvdialconf (pid: 5655, ti=f02ee000
task=f02a3240 task.ti=f02ee000)
[  181.005797] Stack:
[  181.005801]  f02efd20 f8f53769 f86b95e9 f86b95ea f02efd20 c056ea7c
f8f81c93 f02efd6f
[  181.005818] <0> f02efd90 f8f3c9f1 f86af0c4 f8521048 00000008
00000001 f86af39c 00000004
[  181.005837] <0> c162c2a0 00000000 c0784e40 00000000 c01b7e2d
00000001 00000041 ffffffff
[  181.005857] Call Trace:
[  181.005934]  [<f8f53769>] ? CAzlIntelInit+0x2d/0x3c4 [agrmodem]
[  181.005952]  [<c056ea7c>] ? printk+0x18/0x1c
[  181.006038]  [<f8f3c9f1>] ? LXHardwareStart+0x11de/0x13fb [agrmodem]
[  181.006057]  [<c01b7e2d>] ? get_page_from_freelist+0x1bd/0x360
[  181.006066]  [<c0570e3a>] ? _spin_lock_irqsave+0x2a/0x40
[  181.006153]  [<f8f381a8>] ? linux_modem_open+0x45/0x10e [agrmodem]
[  181.006167]  [<c0150c2b>] ? mod_timer+0xcb/0x140
[  181.006226]  [<f8e922a8>] ? wrap_linux_modem_open+0x8/0x10 [agrmodem]
[  181.006284]  [<f8e92308>] ? modemPortOpen+0x8/0x20 [agrmodem]
[  181.006296]  [<f857cfe0>] ? serial8250_startup+0x210/0x380 [agrserial]
[  181.006308]  [<c0399376>] ? uart_startup+0x46/0x140
[  181.006317]  [<c0399eb2>] ? uart_open+0x102/0x220
[  181.006326]  [<c0380f53>] ? __tty_open+0x1a3/0x460
[  181.006335]  [<c038122f>] ? tty_open+0x1f/0x40
[  181.006344]  [<c01eaa5d>] ? chrdev_open+0xcd/0x190
[  181.006353]  [<c01e5a39>] ? __dentry_open+0xb9/0x230
[  181.006361]  [<c01e5c95>] ? nameidata_to_filp+0x55/0x70
[  181.006370]  [<c01ea990>] ? chrdev_open+0x0/0x190
[  181.006379]  [<c01f39ea>] ? do_filp_open+0x53a/0x890
[  181.006389]  [<c01e57d0>] ? do_sys_open+0x50/0x150
[  181.006397]  [<c01e9285>] ? fput+0x15/0x20
[  181.006405]  [<c01e56a7>] ? filp_close+0x47/0x70
[  181.006412]  [<c01e5939>] ? sys_open+0x29/0x40
[  181.006421]  [<c010336c>] ? syscall_call+0x7/0xb
[  181.006426] Code: 10 75 e8 b8 fd ff ff ff 5d c3 90 31 c0 5d c3 8d
74 26 00 89 15 ac b0 fb f8 8b 42 04 5d 83 e0 0f c3 66 90 a1 e0 50 63
fd 55 89 e5 <8b> 80 68 01 00 00 8b 48 74 31 c0 90 8d 74 26 00 8b 54 81
34 85
[  181.006535] EIP: [<f8f68818>] azlGetResourceInformation+0x8/0x60
[agrmodem] SS:ESP 0068:f02efd00
[  181.006598] CR2: 0000000000000168
[  181.006606] ---[ end trace c5d7e7cd560c2388 ]---


After this i tried to boot in rescue mode (only with terminal) to have
even less modules loaded, ran unloading twice, tried wvdial, same..
Everytime i have this, the device is busy after and i have to reboot.

Thanks for your time!
Kevin

2010/2/1 Bjorn Wielens <Uniacke1@xxxxxxxx>:
> Marv, Kevin:
> Just a heads up- These crashes/segfaults almost ALWAYS caused by a
> mismatch between the agrsm driver version and the ALSA version on your
> computer.
>
> Which driver package are you using, and what is the output of
> 'cat /proc/asound/version'?
>
> The ALSA version for my most recently prepared tarball and its
> derivatives is 1.0.20. Any newer is not yet supported.
>
> Thanks,
> Bjorn.
>
>
> On 02/01/2010 08:37 PM, Marvin Stodolsky wrote:
>> Kevin,
>>
>> You are using the correct drivers.
>> Try detaching external devices as much as possible before bootup, and
>> shutting down non-essential programs  before using the modem.  You
>> could check whether the problems begin during a simple activation
>> with:
>> $ sudo wvdialconf  wvtest
>> or only during an actual dialout.
>>
>> I'll also send you an "unloading" script, which tries to unload
>> non-essential modules.
>> Also try using it before modem usage as:
>> $ sudo ./unloading
>>
>> Sadly we don't have debugging capability for these drivers, because
>> there is a closed source component.
>>
>> MarvS
>>
>> On Mon, Feb 1, 2010 at 11:59 AM, Kevin Fernandez <siegfri3d@xxxxxxxxx> wrote:
>>> Sorry this was an old modemdata, i removed slmodem a long time ago.. I
>>> attached a new modemdata.txt.
>>> On windows it says:
>>> Agere Systems HDA modem
>>> Slot 1 (internal High Definition Audio bus)
>>>
>>> device ID HDAUDIO\FUNC_02&VEN_11C1&DEV_1040&SUBSYS_11C10001&REV_1002
>>>
>>> Thanks for the help!
>>> Kevin
>>>
>>> 2010/2/1 Marvin Stodolsky <marvin.stodolsky@xxxxxxxxx>:
>>>> Kevin,
>>>>
>>>> Under install the hsfmodem software.  It is for Conexant modem chips
>>>> and may be interferring.
>>>> Then rerun scanModem
>>>> As described in SoftModem.txt, please get diagnostic info under Microsoft too.
>>>>
>>>> MarvS
>>>> scanModem maintainer
>>>>
>>>>
>>>> On Mon, Feb 1, 2010 at 12:57 AM, Kevin Fernandez <siegfri3d@xxxxxxxxx> wrote:
>>>>> Hello there,
>>>>> I'm trying to get my modem working for some days, still no luck.
>>>>> I've attached the modemdata.
>>>>> I compile the driver (agrsm-11c11040-2.1.80~20091225), i install it
>>>>> and load the modules, then i get:
>>>>> [  677.293574] * Hello Agere Driver **
>>>>> [  677.293623] usbcore: registered new interface driver agr12dec2006
>>>>> [  680.664348] Loading module Agere Modem Controller driver version
>>>>> 2.1.80 (2007-10-01)
>>>>> [  680.664354] Disabling lock debugging due to kernel taint
>>>>> [  683.898153] serial8250_register_ports: BaseAddress 0x8004 Irq 20
>>>>> [  683.898160] ttyAGS3 at I/O 0x8004 (irq = 20) is a AgereModem
>>>>> [  683.898229] agrserial - ret_val 0, call: lt_modem_ops.init_modem
>>>>> [  683.898234] Loading module Agere Modem Interface driver version
>>>>> 2.1.80.0 (2007-10-01)
>>>>>
>>>>>
>>>>> then i fire up wvdial to use the device and i get nothing, but i have
>>>>> this in dmesg:
>>>>>
>>>>> [  694.818705] ==> codecType = 0x32
>>>>> [  694.848151] BUG: unable to handle kernel NULL pointer dereference at 00000060
>>>>> [  694.848167] IP: [<f986a498>] ResumeCallBack+0x18/0x34 [agrmodem]
>>>>> [  694.848264] *pde = 7e584067
>>>>> [  694.848271] Oops: 0000 [#1] SMP
>>>>> [  694.848280] last sysfs file: /sys/devices/system/cpu/cpu1/topology/core_id
>>>>> [  694.848287] Modules linked in: agrserial agrmodem isofs udf
>>>>> crc_itu_t binfmt_misc ppdev vboxnetflt vboxnetadp vboxdrv joydev
>>>>> snd_hda_codec_realtek wlan_scan_sta ath_rate_sample snd_hda_intel
>>>>> pcmcia snd_hda_codec snd_hwdep snd_pcm_oss snd_mixer_oss snd_pcm
>>>>> snd_seq_dummy uvcvideo videodev v4l1_compat sdhci_pci sdhci led_class
>>>>> yenta_socket rsrc_nonstatic pcmcia_core psmouse serio_raw iptable_nat
>>>>> nf_nat nf_conntrack_ipv4 nf_conntrack nf_defrag_ipv4 iptable_mangle
>>>>> iptable_filter ip_tables x_tables ath_pci wlan ath_hal snd_seq_oss
>>>>> snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer
>>>>> snd_seq_device snd soundcore snd_page_alloc sbp2 lp parport dm_raid45
>>>>> xor fbcon tileblit font bitblit softcursor i915 drm i2c_algo_bit
>>>>> ohci1394 ieee1394 r8169 mii intel_agp video agpgart output
>>>>> [  694.848449]
>>>>> [  694.848457] Pid: 7339, comm: wvdial Tainted: P
>>>>> (2.6.31-18-generic #55-Ubuntu) MSI Notebook VR601
>>>>> [  694.848465] EIP: 0060:[<f986a498>] EFLAGS: 00010282 CPU: 0
>>>>> [  694.848550] EIP is at ResumeCallBack+0x18/0x34 [agrmodem]
>>>>> [  694.848557] EAX: f02c0800 EBX: 00000000 ECX: 01828000 EDX: f986a480
>>>>> [  694.848563] ESI: e650dc9c EDI: f02c0800 EBP: e650dc58 ESP: e650dc40
>>>>> [  694.848569]  DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
>>>>> [  694.848577] Process wvdial (pid: 7339, ti=e650c000 task=e6e9e480
>>>>> task.ti=e650c000)
>>>>> [  694.848582] Stack:
>>>>> [  694.848586]  00000000 00000003 0002a22c f02c0800 e650dc9c f02c0800
>>>>> e650dc64 f8bdeca2
>>>>> [  694.848604] <0> f02c0800 e650dc70 f8bdcd84 efcfa200 e650dc94
>>>>> f8bdce20 100f0000 0100cc9f
>>>>> [  694.848622] <0> e650dc9c efcfa274 000f0000 e650dc9c f9947028
>>>>> e650dca8 f8bdde41 ffffffff
>>>>> [  694.848643] Call Trace:
>>>>> [  694.848668]  [<f8bdeca2>] ? hda_call_codec_resume+0x42/0x70 [snd_hda_codec]
>>>>> [  694.848691]  [<f8bdcd84>] ? snd_hda_power_up+0x34/0x60 [snd_hda_codec]
>>>>> [  694.848711]  [<f8bdce20>] ? codec_exec_verb+0x70/0xc0 [snd_hda_codec]
>>>>> [  694.848741]  [<f8bdde41>] ? snd_hda_codec_read+0x31/0x40 [snd_hda_codec]
>>>>> [  694.848801]  [<f989a999>] ? LnxTransferCodecVerbs+0x49/0x60 [agrmodem]
>>>>> [  694.848890]  [<f9884b1b>] ? VerbTransfer+0x2f/0x3c [agrmodem]
>>>>> [  694.848976]  [<f9884b73>] ? GetAzCodecID+0x4b/0x63 [agrmodem]
>>>>> [  694.849063]  [<f9885788>] ? CAzlIntelInit+0x4c/0x3c4 [agrmodem]
>>>>> [  694.849085]  [<c05718fc>] ? printk+0x18/0x1c
>>>>> [  694.849173]  [<f986e9f1>] ? LXHardwareStart+0x11de/0x13fb [agrmodem]
>>>>> [  694.849199]  [<c01b7ea5>] ? get_page_from_freelist+0x1c5/0x370
>>>>> [  694.849209]  [<c0573cba>] ? _spin_lock_irqsave+0x2a/0x40
>>>>> [  694.849295]  [<f986a1a8>] ? linux_modem_open+0x45/0x10e [agrmodem]
>>>>> [  694.849316]  [<c0150bbb>] ? mod_timer+0xcb/0x140
>>>>> [  694.849376]  [<f97c42a8>] ? wrap_linux_modem_open+0x8/0x10 [agrmodem]
>>>>> [  694.849435]  [<f97c4308>] ? modemPortOpen+0x8/0x20 [agrmodem]
>>>>> [  694.849447]  [<f818cfe0>] ? serial8250_startup+0x210/0x380 [agrserial]
>>>>> [  694.849457]  [<c039ceb6>] ? uart_startup+0x46/0x140
>>>>> [  694.849465]  [<c039d9f2>] ? uart_open+0x102/0x220
>>>>> [  694.849475]  [<c0384af3>] ? __tty_open+0x1a3/0x460
>>>>> [  694.849483]  [<c0384dcf>] ? tty_open+0x1f/0x40
>>>>> [  694.849493]  [<c01eabfd>] ? chrdev_open+0xcd/0x190
>>>>> [  694.849502]  [<c01e5bd9>] ? __dentry_open+0xb9/0x230
>>>>> [  694.849511]  [<c01e5e35>] ? nameidata_to_filp+0x55/0x70
>>>>> [  694.849520]  [<c01eab30>] ? chrdev_open+0x0/0x190
>>>>> [  694.849530]  [<c01f3b8a>] ? do_filp_open+0x53a/0x890
>>>>> [  694.849540]  [<c01e5970>] ? do_sys_open+0x50/0x150
>>>>> [  694.849548]  [<c01e9425>] ? fput+0x15/0x20
>>>>> [  694.849556]  [<c01e5847>] ? filp_close+0x47/0x70
>>>>> [  694.849564]  [<c01e5ad9>] ? sys_open+0x29/0x40
>>>>> [  694.849573]  [<c01033ac>] ? syscall_call+0x7/0xb
>>>>> [  694.849578] Code: 89 d8 83 c4 2c 5b 5e 5f 5d c3 90 90 90 90 90 90
>>>>> 90 90 90 55 89 e5 53 83 ec 14 8b 1d e8 e3 8e f9 c7 44 24 04 03 00 00
>>>>> 00 89 1c 24 <ff> 53 60 c7 44 24 04 00 00 00 00 89 1c 24 ff 53 60 b8 00
>>>>> 00 00
>>>>> [  694.849687] EIP: [<f986a498>] ResumeCallBack+0x18/0x34 [agrmodem]
>>>>> SS:ESP 0068:e650dc40
>>>>> [  694.849777] CR2: 0000000000000060
>>>>> [  694.849784] ---[ end trace e662cdc749dd82f6 ]---
>>>>>
>>>>>
>>>>> As you can see i'm running ubuntu karmic, kernel 2.6.31-18-generic .
>>>>> Sometimes wvdial even freezes my computer.
>>>>> Any help is appreciated!
>>>>> Thanks
>>>>>
>>>>
>>>
>>
>
>


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