Enable the LDT (local descriptor table)
modulename: ldt.ko
configname: CONFIG_MODIFY_LDT_SYSCALL
Linux Kernel Configuration
└─>Processor type and features
└─>Enable the LDT (local descriptor table)
In linux kernel since version 4.1 (release Date: 2015-06-21)
Linux can allow user programs to install a per-process x86
Local Descriptor Table (LDT) using the modify_ldt(2) system
call. This is required to run 16-bit or segmented code such as
DOSEMU or some Wine programs. It is also used by some very old
threading libraries.
Enabling this feature adds a small amount of overhead to
context switches and increases the low-level kernel attack
surface. Disabling it removes the modify_ldt(2) system call.
Saying 'N' here may make sense for embedded or server kernels.
Local Descriptor Table (LDT) using the modify_ldt(2) system
call. This is required to run 16-bit or segmented code such as
DOSEMU or some Wine programs. It is also used by some very old
threading libraries.
Enabling this feature adds a small amount of overhead to
context switches and increases the low-level kernel attack
surface. Disabling it removes the modify_ldt(2) system call.
Saying 'N' here may make sense for embedded or server kernels.