From 304ad9698aba59858be761b87d8f6b2568754bff Mon Sep 17 00:00:00 2001
From: Julien Cretin <cretin@google.com>
Date: Fri, 28 Nov 2025 10:51:10 +0100
Subject: [PATCH] Fix undefined behavior due to uninitialized bytes in
 Usbd::write()

Fixes #15
---
 src/usbd.rs | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/src/usbd.rs b/src/usbd.rs
index 3ffaaa1..bd08db7 100644
--- a/src/usbd.rs
+++ b/src/usbd.rs
@@ -7,7 +7,6 @@
 //!   * No notification when the status stage is ACK'd.
 
 use core::cell::Cell;
-use core::mem::MaybeUninit;
 use core::sync::atomic::{compiler_fence, Ordering};
 use critical_section::{CriticalSection, Mutex};
 use usb_device::{
@@ -375,12 +374,8 @@ impl<T: UsbPeripheral> UsbBus for Usbd<T> {
                 return Err(UsbError::WouldBlock);
             }
 
-            let mut ram_buf: MaybeUninit<[u8; 64]> = MaybeUninit::uninit();
-            unsafe {
-                let slice = &mut *ram_buf.as_mut_ptr();
-                slice[..buf.len()].copy_from_slice(buf);
-            }
-            let ram_buf = unsafe { ram_buf.assume_init() };
+            let mut ram_buf = [0u8; 64];
+            ram_buf[..buf.len()].copy_from_slice(buf);
 
             let epin = [
                 &regs.epin0,