CONFIG_DEBUG_HUNT_FOR_ZERO is not available for thedefaultarchitecture x86.
Result is shown for architecture blackfin
default or selected kernelversion does not have config value CONFIG_DEBUG_HUNT_FOR_ZERO.
Result is shown for kernelversion 6.7-rc3

Catch NULL pointer reads/writes


Linux Kernel Configuration
└─>Kernel hacking
└─>Catch NULL pointer reads/writes
In linux kernel since version 2.6.24 (release Date: 2008-01-24)  
Say Y here to catch reads/writes to anywhere in the memory range
from 0x0000 - 0x0FFF (the first 4k) of memory. This is useful in
catching common programming errors such as NULL pointer dereferences.

Misbehaving applications will be killed (generate a SEGV) while the
kernel will trigger a panic.

Enabling this option will take up an extra entry in CPLB table.
Otherwise, there is no extra overhead.