Re: Misc Fixes
Alan Cox (alan@lxorguk.ukuu.org.uk)
Wed, 10 Jul 1996 20:43:44 +0100 (BST)
> Not to jump in or anything, but...
> How about a small kernel function to return the current securelevel value?
> int get_securelevel();
> Then export THAT to modules.
It doesnt help. The malicious module does
unsigned long **ptr=(unsigned long **)&get_securelevel;
unsigned long *securelevelptr=ptr[SOME_CONSTANT];
*securelevelptr=0;