value_oid_as is unsound

[Nugine]

Transmuting bytes to an arbitrary type can cause undefined behavior.

The safety requirements:

1. T must be Sized.
2. The length of bytes must be equal to size_of::<T>().
3. The alignment of bytes must be equal to align_of::<T>().
4. T must be valid for any binary representation.

sysctl-rs/src/unix/funcs.rs

Lines 367 to 369 in 57c05e1

	let val_array: Box<[u8]> = val.into_boxed_slice();
	let val_raw: *mut T = Box::into_raw(val_array) as *mut T;
	let val_box: Box<T> = unsafe { Box::from_raw(val_raw) };

[bigdogs]

+1