Re: 2.6.38-rc7, iwlagn crash

[Mathias BurÃn]

On 4 March 2011 15:17, wwguy <wey-yi.w.guy@xxxxxxxxx> wrote:
> On Fri, 2011-03-04 at 05:46 -0800, John W. Linville wrote:
>> Cc'ing Wey-yi and linux-wireless...anyone else having problems with
>> iwlagn and IBSS?
>>
>> On Fri, Mar 04, 2011 at 03:27:22AM +0000, Mathias BurÃn wrote:
>> > Hi,
>> >
>> > (please cc as not subscribed)
>> >
>> >
>> >
>> > I think the crash happens when the phone attempts to get an IP, at
>> > least that's what the phone says right after/at the crash. Any ideas?
>> >
>> >
> forwarding to my team to work on it, any additional information you can
> provide?
>
> It is in IBSS mode, do you have any information can shared with us on
> your phone's model, setup, and ...
> if you can load the module with debug=0x43fff and provide the dmesg log,
> it will be very helpful
>
> Thanks
> Wey
>
>
>

Hi,

The phone is a Samsung Galaxy S (with "modded" wpa_supplicant to see
adhoc networks). I created a new adhoc network in Ubuntu using the
NetworkManager applet, with SSID "UbuntuAdhoc", band "automatic",
BSSID (blank) and no security. Under IPV4 settings I set it to "Shared
to other computers". Unfortunately I get this when trying to load the
module with debug:

$ sudo modprobe -v iwlagn debug=0x43fff
insmod /lib/modules/2.6.38-020638rc7-generic/kernel/drivers/net/wireless/iwlwifi/iwlagn.ko
11n_disable=1 debug=0x43fff
FATAL: Error inserting iwlagn
(/lib/modules/2.6.38-020638rc7-generic/kernel/drivers/net/wireless/iwlwifi/iwlagn.ko):
Unknown symbol in module, or unknown parameter (see dmesg)
[  447.551540] iwlagn: Unknown parameter `debug'

$ sudo modprobe -v iwlagn
insmod /lib/modules/2.6.38-020638rc7-generic/kernel/drivers/net/wireless/iwlwifi/iwlagn.ko
11n_disable=1


[  501.570685] iwlagn: Intel(R) Wireless WiFi Link AGN driver for
Linux, in-tree:
[  501.570688] iwlagn: Copyright(c) 2003-2010 Intel Corporation
[  501.570760] iwlagn 0000:03:00.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17
[  501.570772] iwlagn 0000:03:00.0: setting latency timer to 64
[  501.570809] iwlagn 0000:03:00.0: Detected Intel(R) Centrino(R)
Advanced-N 6200 AGN, REV=0x74
[  501.580698] iwlagn 0000:03:00.0: device EEPROM VER=0x436, CALIB=0x6
[  501.580703] iwlagn 0000:03:00.0: Device SKU: 0Xb
[  501.580739] iwlagn 0000:03:00.0: Tunable channels: 13 802.11bg, 24
802.11a channels
[  501.580836] iwlagn 0000:03:00.0: irq 44 for MSI/MSI-X
[  501.583936] iwlagn 0000:03:00.0: loaded firmware version 9.221.4.1
build 25532
[  501.584236] cfg80211: Ignoring regulatory request Set by core since
the driver uses its own custom regulatory domain
[  501.584392] ieee80211 phy0: Selected rate control algorithm 'iwl-agn-rs'

Here I create the adhoc network in network manager:

[  536.509700] ADDRCONF(NETDEV_UP): wlan0: link is not ready
[  536.858139] cfg80211: Found new beacon on frequency: 2472 MHz (Ch 13) on phy0
[  536.947735] cfg80211: Found new beacon on frequency: 5180 MHz (Ch 36) on phy0
[  537.041220] cfg80211: Found new beacon on frequency: 5200 MHz (Ch 40) on phy0
[  537.079114] cfg80211: Found new beacon on frequency: 5220 MHz (Ch 44) on phy0
[  537.175392] cfg80211: Found new beacon on frequency: 5240 MHz (Ch 48) on phy0
[  538.973811] cfg80211: Found new beacon on frequency: 5745 MHz (Ch
149) on phy0
[  539.203969] cfg80211: Found new beacon on frequency: 5785 MHz (Ch
157) on phy0
[  539.289182] cfg80211: Found new beacon on frequency: 5805 MHz (Ch
161) on phy0
[  571.156548] ADDRCONF(NETDEV_UP): wlan0: link is not ready
[  599.156798] ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
[  599.161234] wlan0: Trigger new scan to find an IBSS to join
[  604.131831] wlan0: Trigger new scan to find an IBSS to join
[  607.103522] wlan0: Creating new IBSS network, BSSID 42:dd:e6:af:fb:19
[  607.104488] iwlagn 0000:03:00.0: Unable to find TIM Element in beacon
[  607.105407] iwlagn 0000:03:00.0: Unable to find TIM Element in beacon
[  608.501173] wlan0: Trigger new scan to find an IBSS to join
[  609.190883] wlan0: no IPv6 routers present
[  613.397068] wlan0: Trigger new scan to find an IBSS to join
[  616.303044] wlan0: Creating new IBSS network, BSSID ae:eb:cb:59:18:ec
[  616.313716] iwlagn 0000:03:00.0: Unable to find TIM Element in beacon
[  616.314529] iwlagn 0000:03:00.0: Unable to find TIM Element in beacon
[  617.681034] wlan0: Trigger new scan to find an IBSS to join
[  622.736806] wlan0: Trigger new scan to find an IBSS to join
[  625.708399] wlan0: Creating new IBSS network, BSSID 46:b6:a0:1b:c4:7f
[  625.761157] iwlagn 0000:03:00.0: Unable to find TIM Element in beacon
[  625.762035] iwlagn 0000:03:00.0: Unable to find TIM Element in beacon
[  627.438640] iwlagn 0000:03:00.0: Error sending REPLY_RXON_TIMING:
time out after 500ms.
[  627.438648] iwlagn 0000:03:00.0: Failed to send timing (-110)!
[  627.438651] ------------[ cut here ]------------
[  627.438668] WARNING: at
/home/kernel-ppa/COD/linux/drivers/net/wireless/iwlwifi/iwl-core.c:1898
iwl_mac_change_interface+0x12e/0x130 [iwlcore]()
[  627.438672] Hardware name: 4384BB3
[  627.438674] Modules linked in: nf_nat_h323 nf_conntrack_h323
nf_nat_pptp nf_conntrack_pptp nf_conntrack_proto_gre nf_nat_proto_gre
nf_nat_tftp nf_conntrack_tftp nf_nat_sip nf_conntrack_sip nf_nat_irc
nf_nat_ftp iwlagn iwlcore mac80211 cfg80211 xt_limit xt_tcpudp ipt_LOG
ipt_MASQUERADE xt_DSCP ipt_REJECT nf_conntrack_irc nf_conntrack_ftp
xt_state binfmt_misc vboxnetadp vboxnetflt vboxdrv microcode
parport_pc ppdev iptable_nat nf_nat nf_conntrack_ipv4 nf_conntrack
nf_defrag_ipv4 iptable_mangle iptable_filter ip_tables x_tables
snd_hda_codec_hdmi snd_hda_codec_conexant snd_hda_intel snd_hda_codec
snd_hwdep snd_pcm snd_seq_midi joydev snd_rawmidi hdaps thinkpad_ec
snd_seq_midi_event arc4 snd_seq snd_timer uvcvideo videodev
snd_seq_device psmouse v4l2_compat_ioctl32 thinkpad_acpi tpm_tis tpm
tpm_bios nvram lp serio_raw parport snd soundcore intel_ips
snd_page_alloc sha256_generic aesni_intel cryptd aes_x86_64
aes_generic dm_crypt usbhid hid i915 firewire_ohci ahci drm_kms_helper
e1000e libahci drm sdhci_pci firewire_core sdhci crc_itu_t
i2c_algo_bit video [last unloaded: cfg80211]
[  627.438764] Pid: 1203, comm: NetworkManager Not tainted
2.6.38-020638rc7-generic #201103020909
[  627.438767] Call Trace:
[  627.438778]  [<ffffffffa0294c7e>] ?
iwl_mac_change_interface+0x12e/0x130 [iwlcore]
[  627.438787]  [<ffffffffa0294c7e>] ?
iwl_mac_change_interface+0x12e/0x130 [iwlcore]
[  627.438796]  [<ffffffff81065430>] ? warn_slowpath_common+0x90/0xc0
[  627.438801]  [<ffffffff8106547a>] ? warn_slowpath_null+0x1a/0x20
[  627.438809]  [<ffffffffa0294c7e>] ?
iwl_mac_change_interface+0x12e/0x130 [iwlcore]
[  627.438827]  [<ffffffffa02589ec>] ?
ieee80211_runtime_change_iftype+0xdc/0x180 [mac80211]
[  627.438840]  [<ffffffffa0258b85>] ?
ieee80211_if_change_type+0xf5/0x120 [mac80211]
[  627.438854]  [<ffffffffa025b95b>] ?
ieee80211_change_iface+0x3b/0x130 [mac80211]
[  627.438865]  [<ffffffffa020a898>] ?
cfg80211_change_iface+0xe8/0x1c0 [cfg80211]
[  627.438877]  [<ffffffffa02228f6>] ? cfg80211_wext_siwmode+0xa6/0xf0
[cfg80211]
[  627.438884]  [<ffffffff8158a4cb>] ? ioctl_standard_call+0x6b/0xf0
[  627.438889]  [<ffffffff8158a460>] ? ioctl_standard_call+0x0/0xf0
[  627.438893]  [<ffffffff81589882>] ? wireless_process_ioctl+0x102/0x130
[  627.438898]  [<ffffffff8158afe0>] ? ioctl_private_call+0x0/0xa0
[  627.438902]  [<ffffffff8158afe0>] ? ioctl_private_call+0x0/0xa0
[  627.438907]  [<ffffffff8158a460>] ? ioctl_standard_call+0x0/0xf0
[  627.438911]  [<ffffffff8158991c>] ? wext_ioctl_dispatch+0x6c/0x90
[  627.438916]  [<ffffffff81589b66>] ? wext_handle_ioctl+0x46/0x90
[  627.438922]  [<ffffffff814c687b>] ? dev_ioctl+0x28b/0x2a0
[  627.438927]  [<ffffffff814ad25f>] ? sock_ioctl+0xbf/0x280
[  627.438933]  [<ffffffff811704bd>] ? vfs_ioctl+0x1d/0x50
[  627.438937]  [<ffffffff81170f79>] ? do_vfs_ioctl+0x69/0x1d0
[  627.438940]  [<ffffffff81171174>] ? sys_ioctl+0x94/0xa0
[  627.438945]  [<ffffffff8100c002>] ? system_call_fastpath+0x16/0x1b
[  627.438949] ---[ end trace c7a5b9f525294bcc ]---
[  627.552179] wlan0: Trigger new scan to find an IBSS to join

Hm, not much I can do without recompiling the module with debug
support? Is there a way I can do this without recompiling the kernel?

Kind regards,
// Mathias
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