Is your enhancement proposal related to a problem? Please describe.
Syscalls run on fixed-sized privilege elevation stacks. There is a hard limit on how much stack space a system call can use because of this. We don't have good data on how much stack syscalls actually use.

Describe the solution you'd like
I'd like to be able to use CONFIG_STACK_USAGE to be able to generate a report,

In PROTECTED mode, the MPU is used to map regions of memory to supervisor- and/or user-accessible memory. Currently, that algorithm is very simple: The entire address range is made accessible in supervisor mode; a single MPU region is used to enable user-mode access in each user memory region.

Each MPU region must bit both of a power-of-two size and with an alignment in memory equal to the si

With aligned_alloc() in the C11 standard, free() is called to free memory, rather than an equivalent aligned_free().

We should update our library with some logic that can be used to correctly call aligned_free() if free() is used instead.