[Libdlo] Kernel panic with udlfb

[Alexander Todorov]

Hi all,
I got a kernel panic on 2.6.32 kernel with a slightly older version of udlfb 
when trying to extract some udev info:

# udevadm info -q all -a -p `pwd`

Udevadm info starts with the device specified by the devpath and then
walks up the chain of parent devices. It prints for every device
found, all possible attributes in the udev rules key format.
A rule to match, can be composed by the attributes of the device
and the attributes from one single parent device.

   looking at device '/devices/pci0000:00/0000:00:1d.7/usb2/2-2/2-2.1/graphics/fb1':
     KERNEL=="fb1"
     SUBSYSTEM=="graphics"
     DRIVER==""
     ATTR{bits_per_pixel}=="16"
     ATTR{blank}==""
     ATTR{console}==""
     ATTR{cursor}==""
     ATTR{mode}==""
     ATTR{pan}=="0,0"
     ATTR{virtual_size}=="1024,768"
     ATTR{name}=="udlfb"
     ATTR{stride}=="2048"
     ATTR{rotate}=="0"
     ATTR{state}=="0"
     ATTR{metrics_bytes_rendered}=="12369280"
     ATTR{metrics_bytes_identical}=="4423288"
     ATTR{metrics_bytes_sent}=="2551490"
     ATTR{metrics_cpu_kcycles_used}=="145906"
     ATTR{use_defio}=="0"

Message from syslogd at sumu01 at Oct 11 20:44:20 ...
  kernel:Oops: 0000 [#1] SMP

Message from syslogd at sumu01 at Oct 11 20:44:20 ...
  kernel:last sysfs file: 
/sys/devices/pci0000:00/0000:00:1d.7/usb2/2-2/2-2.1/graphics/fb1/use_defio

Message from syslogd at sumu01 at Oct 11 20:44:20 ...
  kernel:Process udevadm (pid: 2363, ti=e9c64000 task=f71a2030 task.ti=e9c64000)

Message from syslogd at sumu01 at Oct 11 20:44:20 ...
  kernel:Stack:

Message from syslogd at sumu01 at Oct 11 20:44:20 ...
  kernel:Call Trace:

Message from syslogd at sumu01 at Oct 11 20:44:20 ...
  kernel:Code: 83 ec 10 83 e8 08 89 1c 24 8b 5c 24 1c 89 74 24 04 89 ce 89 7c 24 
08 8b 7c 24 14 89 6c 24 0c 8b 6c 24 18 e8 28 1d 39 c7 83 fd 00 <8b> 88 30 03 00 
00 7c 12 7e 0b 31 c0 eb 38 8d b4 26 00 00 00 00

Message from syslogd at sumu01 at Oct 11 20:44:20 ...
  kernel:EIP: [<f930f2bb>] edid_show+0x2b/0xa0 [udlfb] SS:ESP 0068:e9c65f10

Message from syslogd at sumu01 at Oct 11 20:44:20 ...
  kernel:CR2: 0000000000000330

Message from syslogd at sumu01 at Oct 11 20:44:20 ...
  kernel:Kernel panic - not syncing: Fatal exception


--
Regards,
Alexander.