CONFIG_HAVE_ARCH_THREAD_STRUCT_WHITELIST (not configurable)
configname: CONFIG_HAVE_ARCH_THREAD_STRUCT_WHITELIST
Linux Kernel Configuration
└─>General architecture-dependent options
└─>HAVE_ARCH_THREAD_STRUCT_WHITELIST
In linux kernel since version 3.10 (release Date: 2013-06-30)
An architecture should select this to provide hardened usercopy
knowledge about what region of the thread_struct should be
whitelisted for copying to userspace. Normally this is only the
FPU registers. Specifically, arch_thread_struct_whitelist()
should be implemented. Without this, the entire thread_struct
field in task_struct will be left whitelisted.
knowledge about what region of the thread_struct should be
whitelisted for copying to userspace. Normally this is only the
FPU registers. Specifically, arch_thread_struct_whitelist()
should be implemented. Without this, the entire thread_struct
field in task_struct will be left whitelisted.