asmlinkage int sys_modify_ldt(int func, void __user *ptr,
unsigned long bytecount)
{
int ret = -ENOSYS;
if (!sysctl_modify_ldt) {
printk_ratelimited(KERN_INFO
"Denied a call to modify_ldt() from %s[%d] (uid: %d)."
" Adjust sysctl if this was not an exploit attempt.\n",
current->comm, task_pid_nr(current),
from_kuid_munged(current_user_ns(), current_uid()));
return ret;
}
switch (func) {
case 0:
ret = read_ldt(ptr, bytecount);
break;
case 1:
ret = write_ldt(ptr, bytecount, 1);
break;
case 2:
ret = read_default_ldt(ptr, bytecount);
break;
case 0x11:
ret = write_ldt(ptr, bytecount, 0);
break;
}
return ret;
}
asmlinkage int
sys32_modify_ldt (int func, unsigned int ptr, unsigned int bytecount)
{
int ret = -ENOSYS;
switch (func) {
case 0:
ret = read_ldt(P(ptr), bytecount);
break;
case 1:
ret = write_ldt(P(ptr), bytecount, 1);
break;
case 2:
ret = read_default_ldt(P(ptr), bytecount);
break;
case 0x11:
ret = write_ldt(P(ptr), bytecount, 0);
break;
}
return ret;
}
asmlinkage int sys_modify_ldt(int func, void __user *ptr,
unsigned long bytecount)
{
int ret = -ENOSYS;
switch (func) {
case 0:
ret = read_ldt(ptr, bytecount);
break;
case 1:
ret = write_ldt(ptr, bytecount, 1);
break;
case 2:
ret = read_default_ldt(ptr, bytecount);
break;
case 0x11:
ret = write_ldt(ptr, bytecount, 0);
break;
}
return ret;
}