/********************************************************\
 * fuckptrace.c                                         *
 * By truff (truff@projet7.org)                         *
 *                                                      *
 * lkm to bypass anti ptrace protections in reverse     *
 * engineering process.                                 *
 *                                                      *
 * Greetz to #root and #!fr people                      *
 *                                                      *
 *   www.projet7.org           - Security Researchs -   *
\********************************************************/


#define MODULE=20
#define __KERNEL__=20

#include <linux/module.h>=20
#include <linux/kernel.h>=20
#include <sys/syscall.h>
#include <sys/ptrace.h>
#include <linux/sched.h>

extern void* sys_call_table[];=20
extern struct task_struct *current;

int (*orig_ptrace)(int requete, int pid, int addr, int data);


int hacked_ptrace(int requete, int pid, int addr, int data)
{=20
  int ret =3D 0;

  if (current->ptrace & PT_PTRACED)
    ret =3D 0;
  else=20
    ret =3D orig_ptrace (requete, pid, addr, data);=20

  return ret;
}=20

int init_module(void) =20
{=20
  orig_ptrace =3D sys_call_table[SYS_ptrace];=20
  sys_call_table[SYS_ptrace] =3D hacked_ptrace;=20
 =20
  return 0;=20
}=20

void cleanup_module(void) =20
{=20
  sys_call_table[SYS_ptrace]=3Dorig_ptrace;=20
}