> I need a way to cause the kernel to oops on demand. This needs to work with an
> arbitrary kernel version, and it would be preferable as a module. I recall that
> awhile back (possibly running 2.0.x), there was a joystick driver revision that
> had an action (unintended) like this. I suppose I could just modify the
> joystick driver to deference a null pointer when a button is pressed, but I
> thought I'd ask if anyone had built a module/patch for this purpose already.
>
I used to have one. I might even still have the source somewhere, but I can't
find it quickly.
Its fairly easy - init_module registers a file in /proc. Reading that
file deferences a null pointer.
So you have (from memory, completely untested):
#include <linux/proc_fs.h>
int oops(/* can't remember the args*/) {
/* Force an oops */
foo = *(int *)0;
}
struct proc_dir_entry oopser={
0,4,"Oops",00200,1,0,0,0,NULL,oops,
};
int init_module(void) {
proc_register_dynamic(&proc_sys,&oopser);
}
void cleanup_module(void) {
proc_unregister(&proc_sys,oopser.inode);
}
-- Mike <rickettm@ox.compsoc.net>Chemist who falls in acid will be tripping for weeks.
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