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CONFIG_KMSAN_CHECK_PARAM_RETVAL: Check for uninitialized values passed to and returned from functions

General informations

The Linux kernel configuration item CONFIG_KMSAN_CHECK_PARAM_RETVAL:

Help text

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.

Hardware

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