[Madwifi-users] macchanger on wifi0 - segfault + kernel oops

[<vo...@bu...>]

So I'm following the docs at:

http://madwifi.org/wiki/UserDocs/ChangeMacAddress

And it seems that this only works if I do things in the following manner:

ifconfig ath0 up
ifconfig ath0 down
wlanconfig ath0 destroy
maccahnger -A wifi0
wlanconfig ath create wlandev wifi0 wlanmode sta

If I don't bring ath0 up at least once before I do this I get a segfault 
from macchanger and the oops pasted below.  Anyone else see this ?  Here 
is my ath dmesg info as well:

[4294685.584000] wifi0: 11a rates: 6Mbps 9Mbps 12Mbps 18Mbps 24Mbps 36Mbps 
48Mbps 54Mbps
[4294685.584000] wifi0: 11b rates: 1Mbps 2Mbps 5.5Mbps 11Mbps
[4294685.584000] wifi0: 11g rates: 1Mbps 2Mbps 5.5Mbps 11Mbps 6Mbps 9Mbps 
12Mbps 18Mbps 24Mbps 36Mbps 48Mbps 54Mbps
[4294685.584000] wifi0: turboA rates: 6Mbps 9Mbps 12Mbps 18Mbps 24Mbps 
36Mbps 48Mbps 54Mbps
[4294685.585000] wifi0: H/W encryption support: WEP AES AES_CCM TKIP
[4294685.585000] wifi0: mac 5.6 phy 4.1 5ghz radio 1.7 2ghz radio 2.3
[4294685.585000] wifi0: Use hw queue 1 for WME_AC_BE traffic
[4294685.585000] wifi0: Use hw queue 0 for WME_AC_BK traffic
[4294685.585000] wifi0: Use hw queue 2 for WME_AC_VI traffic
[4294685.585000] wifi0: Use hw queue 3 for WME_AC_VO traffic
[4294685.585000] wifi0: Use hw queue 8 for CAB traffic
[4294685.585000] wifi0: Use hw queue 9 for beacons
[4294685.600000] wifi0: Atheros 5212: mem=0xd0200000, irq=209


Jun 22 19:06:59 0x0001 kernel: [4294781.005000] Unable to handle kernel 
NULL pointer dereference at virtual address 00000000
Jun 22 19:06:59 0x0001 kernel: [4294781.005000]  printing eip:
Jun 22 19:06:59 0x0001 kernel: [4294781.005000] d8b0ffa2
Jun 22 19:06:59 0x0001 kernel: [4294781.005000] *pde = 00000000
Jun 22 19:06:59 0x0001 kernel: [4294781.005000] Oops: 0000 [#1]
Jun 22 19:06:59 0x0001 kernel: [4294781.005000] PREEMPT SMP
Jun 22 19:06:59 0x0001 kernel: [4294781.005000] Modules linked in: 
wlan_scan_sta radeon drm vmnet vmmon ipt_LOG ipt_limit ipt_state 
ip_conntra
ck nfnetlink iptable_filter ip_tables cisco_ipsec rfcomm l2cap bluetooth 
ipv6 ppdev acpi_cpufreq speedstep_lib cpufreq_userspace cpufreq_stats
  freq_table cpufreq_powersave cpufreq_ondemand cpufreq_conservative video 
tc1100_wmi sony_acpi pcc_acpi hotkey dev_acpi container button acpi_
sbs battery ac i2c_acpi_ec i2c_core dm_mod md_mod sr_mod sbp2 scsi_mod lp 
pcmcia 8139cp parport_pc parport 8139too mii yenta_socket rsrc_nonst
atic pcmcia_core joydev ath_pci ath_rate_sample wlan ath_hal pcspkr tsdev 
snd_atiixp snd_atiixp_modem snd_ac97_codec snd_ac97_bus snd_pcm_oss
snd_mixer_oss snd_pcm snd_timer psmouse serio_raw snd soundcore 
snd_page_alloc shpchp pci_hotplug ati_agp agpgart evdev ext3 jbd 
ide_generic e
hci_hcd ohci1394 ieee1394 ohci_hcd usbcore ide_cd cdrom ide_disk generic 
atiixp thermal processor fan capability commoncap vga16fb vgastate fb
con tileblit font bitblit softcu
Jun 22 19:06:59 0x0001 kernel: sor
Jun 22 19:06:59 0x0001 kernel: [4294781.005000] CPU:    0
Jun 22 19:06:59 0x0001 kernel: [4294781.005000] EIP: 
0060:[pg0+409702306/1069184000]    Tainted: P      VLI
Jun 22 19:06:59 0x0001 kernel: [4294781.005000] EFLAGS: 00010296 
(2.6.15-23-686)
Jun 22 19:06:59 0x0001 kernel: [4294781.005000] EIP is at 
zz0b69b07c+0x5e/0xa8 [ath_hal]
Jun 22 19:06:59 0x0001 kernel: [4294781.005000] eax: 00000000   ebx: 
d4e18000   ecx: cc6cde12   edx: 00000000
Jun 22 19:06:59 0x0001 kernel: [4294781.005000] esi: 00000000   edi: 
d4e18000   ebp: d4e18000   esp: cc6cde00
Jun 22 19:06:59 0x0001 kernel: [4294781.005000] ds: 007b   es: 007b   ss: 
0068
Jun 22 19:06:59 0x0001 kernel: [4294781.005000] Process macchanger (pid: 
5291, threadinfo=cc6cc000 task=cf4f7030)
Jun 22 19:06:59 0x0001 kernel: [4294781.005000] Stack: d8b0b7fc d4e18000 
d8b1098d d4e18000 00000000 d8b0b7fc 00000000 d4e18000
Jun 22 19:06:59 0x0001 kernel: [4294781.005000]        d8b0b8f0 d4e18000 
d4e182c8 00000001 00000000 d4e1007b 0000007b ffffffef
Jun 22 19:06:59 0x0001 kernel: [4294781.005000]        d8b0a47f 00000060 
00000206 00000000 d8a9e806 d4e18000 00000000 00000000
Jun 22 19:06:59 0x0001 kernel: [4294781.005000] Call Trace:
Jun 22 19:06:59 0x0001 kernel: [4294781.005000] 
[pg0+409683964/1069184000] zz0002dbd2+0x0/0xd30 [ath_hal]
Jun 22 19:06:59 0x0001 kernel: [4294781.005000] 
[pg0+409704845/1069184000] zz0016d872+0x15/0x1ac [ath_hal]
Jun 22 19:06:59 0x0001 kernel: [4294781.005000] 
[pg0+409683964/1069184000] zz0002dbd2+0x0/0xd30 [ath_hal]
Jun 22 19:06:59 0x0001 kernel: [4294781.005000] 
[pg0+409684208/1069184000] zz0002dbd2+0xf4/0xd30 [ath_hal]
Jun 22 19:06:59 0x0001 kernel: [4294781.005000] 
[pg0+409678975/1069184000] zz0016da50+0x1b/0x28 [ath_hal]
Jun 22 19:06:59 0x0001 kernel: [4294781.005000] 
[pg0+409237510/1069184000] ath_stoprecv+0x46/0x110 [ath_pci]
Jun 22 19:06:59 0x0001 kernel: [4294781.005000] 
[pg0+409237281/1069184000] ath_draintxq+0x71/0x110 [ath_pci]
Jun 22 19:06:59 0x0001 kernel: [4294781.005000] 
[pg0+409683964/1069184000] zz0002dbd2+0x0/0xd30 [ath_hal]
Jun 22 19:06:59 0x0001 kernel: [4294781.005000] 
[pg0+409198408/1069184000] ath_reset+0x88/0x240 [ath_pci]
Jun 22 19:06:59 0x0001 kernel: [4294781.005000] 
[pg0+409248272/1069184000] ath_set_mac_address+0xa0/0x150 [ath_pci]
Jun 22 19:06:59 0x0001 kernel: [4294781.005000] 
[dev_set_mac_address+94/128] dev_set_mac_address+0x5e/0x80
Jun 22 19:06:59 0x0001 kernel: [4294781.005000]  [dev_ioctl+530/752] 
dev_ioctl+0x212/0x2f0
Jun 22 19:06:59 0x0001 kernel: [4294781.005000]  [do_ioctl+59/160] 
do_ioctl+0x3b/0xa0
Jun 22 19:06:59 0x0001 kernel: [4294781.005000]  [vfs_ioctl+107/560] 
vfs_ioctl+0x6b/0x230
Jun 22 19:06:59 0x0001 kernel: [4294781.005000]  [sys_ioctl+136/160] 
sys_ioctl+0x88/0xa0
Jun 22 19:06:59 0x0001 kernel: [4294781.005000] 
[sysenter_past_esp+84/117] sysenter_past_esp+0x54/0x75
Jun 22 19:06:59 0x0001 kernel: [4294781.005000] Code: 00 00 00 00 00 00 83 
c4 18 5b c3 89 f6 56 53 8b 74 24 10 8b 5c 24 0c ba 00 00 00 00 90 8
d 04 92 8d 04 42 66 8b 84 c3 34 2a 00 00 <66> 3b 06 75 05 89 d0 eb 3c 90 
8d 04 92 8d 04 42 8d 8c c3 30 2a


--
Brandon Applegate - CCIE 10273
PGP Key fingerprint:
7407 DC86 AA7B A57F 62D1 A715 3C63 66A1 181E 6996
"SH1-0151.  This is the serial number, of our orbital gun."