Messages in this thread | | | Date | Sun, 15 Aug 1999 18:56:50 +0100 (BST) | From | Mike <> | Subject | Re: Linux kernel module to cause OOPS on demand? |
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On Thu, 12 Aug 1999, Brian Hall wrote:
> 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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