Bug 167209 - ./ifup-wireless causes system to kinda hang
Summary: ./ifup-wireless causes system to kinda hang
Alias: None
Product: Fedora
Classification: Fedora
Component: system-config-network
Version: 4
Hardware: x86_64
OS: Linux
Target Milestone: ---
Assignee: Harald Hoyer
QA Contact:
Depends On:
TreeView+ depends on / blocked
Reported: 2005-08-31 15:38 UTC by W Agtail
Modified: 2007-11-30 22:11 UTC (History)
0 users

Clone Of:
Last Closed: 2005-09-12 18:34:54 UTC

Attachments (Terms of Use)
snip from /var/log/messages (6.97 KB, text/plain)
2005-08-31 15:38 UTC, W Agtail
no flags Details

Description W Agtail 2005-08-31 15:38:09 UTC
Description of problem:
./ifup-wireless causes system to kinda hang and does not configure wlan0.

Version-Release number of selected component (if applicable):
> rpm -qa|grep system-config-network

> uname -r -p
2.6.12-1.1398_FC4 x86_64

How reproducible:

Steps to Reproduce:
New, Wireless connection, rt2500 (wlan0),
Mode:                                   Ad-Hoc
Network name (SSID):    Specified:      mine
Channel:                                1
Transmit rate:                          Auto
Key: (Use 0x for hex):                  12345qwertyui

Statically set IP address:
Subnet mask:                  
Default gateway address:
NB: I'm using peer-to-peer, so I leave gateway blank.

Apply, select wlan0 from main GUI (Network Configuration),
click 'Activate' button, answer 'Yes' to save changes, Click OK,

Actual results:
At this point, a windows titled 'system-config-network:' pops up with:
Activating network device wlan0, please wait...
./ifup-wireless: line 50: 10740 Segmentation fault
iwconfig $DEVICE channel $CHANNEL

and this message is broadcast to all open shell sessions;
Message from syslog@localhost at Wed Aug 21 16:07:24 2005 ...
localhost kernel: invalid operand: 0000 [1]

Expected results:
A working wlan0

Additional info:
'ifconfig -a' just hangs
unable to start any new desktop Apps
system appears to be alive :)

Manually setting wlan0 works just fine, but obviously doen't save to any
config files and bypasses ./ifup-wireless:
ifconfig wlan0 inet broadcast \
netmask up

iwconfig wlan0 essid mine mode Ad-Hoc channel 1 rate auto key s:12345qwertyui

Also see attached /var/log/messages.

Any ideas?
Many thanks, W Agtail

Comment 1 W Agtail 2005-08-31 15:38:09 UTC
Created attachment 118305 [details]
snip from /var/log/messages

Comment 2 Harald Hoyer 2005-09-01 10:20:23 UTC
please run:
# sh -x ./ifup-wireless

then you'll see what segfaults

Comment 3 W Agtail 2005-09-01 20:02:31 UTC
Hi, not quite sure if this is what you're after?

rootl> pwd

root> sh -x ./ifup-wireless
+ '[' -n '' ']'
+ '[' -n '' -o -n '' ']'
+ '[' -n '' ']'
+ '[' -n '' -a '' '!=' Managed ']'
+ '[' -n '' -a '' '!=' Managed ']'
+ '[' -n '' ']'
+ '[' -n '' ']'
+ '[' -n '' -o -n '' -o -n '' -o -n '' -o -n '' ']'
+ iwconfig key off
Error : unrecognised wireless request "off"
+ '[' -n '' ']'
+ '[' -n '' ']'
+ '[' -n '' ']'
+ '[' -n '' ']'
+ '[' -n '' ']'
+ '[' -n '' ']'
+ '[' -n '' ']'
+ iwconfig essid any
Error : unrecognised wireless request "any"


Thanks gain

Comment 4 Harald Hoyer 2005-09-02 07:51:38 UTC
no, ok, this wasn't what I wanted :)
but you already answered the question I had:
./ifup-wireless: line 50: 10740 Segmentation fault
iwconfig $DEVICE channel $CHANNEL

and this message is broadcast to all open shell sessions;
Message from syslog@localhost at Wed Aug 21 16:07:24 2005 ...
localhost kernel: invalid operand: 0000 [1]

so it seems, that the rt2500 driver has a problem.

does a simple:
# iwconfig wlan0 channel 1

Comment 5 W Agtail 2005-09-02 11:56:16 UTC
Hmm, no sign of a segfault:

rootl> iwconfig wlan0 channel 1
rootl> ifconfig wlan0
wlan0     Link encap:Ethernet  HWaddr 00:0F:EA:84:3F:F5
          BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)
          Interrupt:233 Base address:0xc000

rootl> iwconfig wlan0
wlan0     RT2500 Wireless  ESSID:""
          Mode:Managed  Frequency=2.412 GHz  Bit Rate=1 Mb/s
          RTS thr:off   Fragment thr:off
          Encryption key:off
          Link Quality=0/100  Signal level=-120 dBm  Noise level:-256 dBm
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0

thanks again for your time on this.
any ideas?

Comment 6 W Agtail 2005-09-02 12:20:38 UTC
P.S. My knowledge of what conditions cause a segfault is zero :(
Would you be able to provide brief comments on this?

I was kinda under the impression that my case of segfault was some how caused by
ifup-wireless (or somewhere within the network start up scripts) as I'm able to
configure wlan0 manually.


Comment 7 W Agtail 2005-09-02 13:21:47 UTC
ha, now I get it, thanks for the inspiration :)
'rmmod rt2500' caused the segfault - nothing at all to do with startup scripts.

Latest CVS version fixed this.

Sorry :(

Regards W. Agtail

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