Segmentation Fault/Kernal panic

[rjayavrp]

hi guys,

While inserting/executing a kernel module, I got segmentation fault/Kernal panic.

after that im not able to remove that module.

finally i need to restart the system. is there any way to remove that module without restarting.

[jayd512]

Provided you know which module it is, take a look at rmmod.

There is also modprobe -r

[Rubberman]

If you reboot into runlevel 3 (no GUI), log in as root, and run "modprobe -r modname" you should be able to get rid of it, otherwise it means editing a bunch of configuration files for kernel startup, and you don't want to go there as yet. I assume you can still boot the system? Or does it panic trying to start up?

[rjayavrp]

Hey guys..

once kernel panic or segmentation comes, then i use

rmmod modulename

but, the error comes as module busy.

if i give lsmod , then it shows module is used by 1.
but no module info which is using is not given.

[Rubberman]

Did you try the --force option? It might not work, but if the module was built with CONFIG_MODULE_FORCE_UNLOAD then this will unload it even if busy.

[rjayavrp]

hi guys,
i have tried both --force and modprobe -r.
# for Modprobe -r
"Device is busy" message is displayed.
#--force option
rmmod --force i gave... there is no option like --force.

[jayd512]

I just want to clarify...

rmmod -f module-name

Came back no force option? (or similar)

[rjayavrp]

I just want to clarify...

thank u friend..

[Rubberman]

hi guys,
i have tried both --force and modprobe -r.
# for Modprobe -r
"Device is busy" message is displayed.
#--force option
rmmod --force i gave... there is no option like --force.

It's possible that you have an older version than I do, and does not support the --force option. If so, then try -f, as in: rmmod -f modname