CONFIG_SHADOW_CALL_STACK=y # CONFIG_SHADOW_CALL_STACK_VMAP is not set # CONFIG_DEBUG_STACK_USAGE is not set
By default, shadow stacks are not virtually allocated to minimize memory overhead, but CONFIG_SHADOW_CALL_STACK_VMAP can be enabled for better stack exhaustion protection. With CONFIG_DEBUG_STACK_USAGE, the kernel will also print out shadow stack usage in addition to normal stack usage which can be helpful when debugging issues.
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