CONFIG_HAVE_ARCH_RANDOMIZE_KSTACK_OFFSET (not configurable)
configname: CONFIG_HAVE_ARCH_RANDOMIZE_KSTACK_OFFSET
Linux Kernel Configuration
└─>General architecture-dependent options
└─>HAVE_ARCH_RANDOMIZE_KSTACK_OFFSET
In linux kernel since version 5.2 (release Date: 2019-07-07)
An arch should select this symbol if it can support kernel stack
offset randomization with calls to add_random_kstack_offset()
during syscall entry and choose_random_kstack_offset() during
syscall exit. Careful removal of -fstack-protector-strong and
-fstack-protector should also be applied to the entry code and
closely examined, as the artificial stack bump looks like an array
to the compiler, so it will attempt to add canary checks regardless
of the static branch state.
offset randomization with calls to add_random_kstack_offset()
during syscall entry and choose_random_kstack_offset() during
syscall exit. Careful removal of -fstack-protector-strong and
-fstack-protector should also be applied to the entry code and
closely examined, as the artificial stack bump looks like an array
to the compiler, so it will attempt to add canary checks regardless
of the static branch state.