[bevy_core/bytes] Fix UB with accessing memory with incorrect alignment

Author: NathanSWard

crates/bevy_core/src/bytes.rs

@@ -49,11 +49,7 @@ where
     T: Byteable + Clone,
 {
     fn from_bytes(bytes: &[u8]) -> Self {
-        unsafe {
-            let byte_ptr = bytes.as_ptr();
-            let ptr = byte_ptr as *const Self;
-            (*ptr).clone()
-        }
+        unsafe { bytes.as_ptr().cast::<Self>().read_unaligned() }
     }
 }
 
@@ -170,10 +166,8 @@ where
 {
     fn from_bytes(bytes: &[u8]) -> Self {
         unsafe {
-            let byte_ptr = bytes.as_ptr() as *const T;
-            let len = bytes.len() / std::mem::size_of::<T>();
-            let slice = core::slice::from_raw_parts::<T>(byte_ptr, len);
-            slice.to_vec()
+            let (_, body, _) = bytes.align_to::<T>();
+            body.to_vec()
         }
     }
 }