Check for uninitialized values passed to and returned from functions
configname: CONFIG_KMSAN_CHECK_PARAM_RETVAL
Linux Kernel Configuration
└─>Kernel hacking
└─>Memory Debugging
└─>Check for uninitialized values passed to and returned from functions
In linux kernel since version 6.1 (release Date: 2022-12-11)
If the compiler supports -fsanitize-memory-param-retval, KMSAN will
eagerly check every function parameter passed by value and every
function return value.
Disabling KMSAN_CHECK_PARAM_RETVAL will result in tracking shadow for
function parameters and return values across function borders. This
is a more relaxed mode, but it generates more instrumentation code and
may potentially report errors in corner cases when non-instrumented
functions call instrumented ones.
eagerly check every function parameter passed by value and every
function return value.
Disabling KMSAN_CHECK_PARAM_RETVAL will result in tracking shadow for
function parameters and return values across function borders. This
is a more relaxed mode, but it generates more instrumentation code and
may potentially report errors in corner cases when non-instrumented
functions call instrumented ones.