/*
* HAPPY NEW YEAR
*/

#define MODULE
#define LINUX
#define __KERNEL__

#include
#include
#include
#include
#include
#include
#include
#include
#include
#include

#define VERSION “0.1”

int (*o_setuid) (uid_t); // 23 SYS_setuid
int (*o_setreuid) (uid_t ruid, uid_t euid); // 70 SYS_setreuid
int (*o_setresuid)(uid_t ruid, uid_t euid, uid_t suid); // 164 SYS_setresuid

extern void* sys_call_table[];

int toby_setuid(uid_t uid)
{
uid_t o_uid;
int it;

if (current -> uid && ! uid)
{
printk(“Warning: SETUID SYS_CALL tried\n”
“pid=%i current uid=(%i) -> uid=(%i)\n”,
current->pid,
current->uid,
uid);
o_uid=current->uid;
it=(* o_setuid)(uid);
if (o_uid && ! uid)
{
printk(“%i\n”,it);
}
console_print(“You are not allowed to perform a SETUID SYS_CALL\n”);
return(0);
}
}
int toby_setreuid(uid_t ruid, uid_t euid)
{
uid_t o_uid;
int it;

if (current->uid && ! ruid || ! euid)
{
printk(“Warning: SETEUID SYS_CALL tried\n”
“pid=%i current uid=(%i) -> ruid=(%i)\n”,
current->pid,
current->uid,
ruid);
o_uid=current->uid;
it=(* o_setreuid)(ruid,euid);
if (o_uid && ! ruid || ! euid)
{
printk(“%i\n”,it);
}
console_print(“You are not allowed to perform a SETREUID SYS_CALL\n”);
return(0);
}
}
int toby_setresuid(uid_t ruid, uid_t euid, uid_t suid)
{
uid_t o_uid;
int it;

if (current->uid && ! ruid || ! suid || ! euid)
{
printk(“Warning: SETRESUID SYS_CALL tried\n”
“pid=%i current uid=(%i) -> suid=(%i)\n”,
current->pid,
current->uid,
suid);
o_uid=current->uid;
it=(* o_setresuid)(ruid,euid,suid);
if (o_uid && ! ruid || ! suid || ! euid)
{
printk(“%i\n”,it);
}
console_print(“You are not allowed to perform a SETRESUID SYS_CALL\n”);
return(0);
}
}
int init_module(void)
{
o_setuid=sys_call_table[SYS_setuid];
sys_call_table[SYS_setuid]=toby_setuid;

o_setreuid=sys_call_table[SYS_setreuid];
sys_call_table[SYS_setreuid]=toby_setreuid;

o_setresuid=sys_call_table[SYS_setresuid];
sys_call_table[SYS_setresuid]=toby_setresuid;

printk("Toby_sec %s kernel module started [pid=%i]\n"
,VERSION
,current->pid);
return(0);
}
void cleanup_module(void)
{
sys_call_table[SYS_setuid]=o_setuid;
sys_call_table[SYS_setreuid]=o_setreuid;
sys_call_table[SYS_setresuid]=o_setresuid;

printk("Toby_sec %s kernel module ended [pid=%i]\n"
,VERSION
,current->pid);
}<br><br>ultra ekki bara uppþvottalögu