From ebfc9c1c4ebf294822da14ea128b6799cc712652 Mon Sep 17 00:00:00 2001
From: Erin <erin@erindesu.cz>
Date: Sun, 8 Oct 2023 11:24:55 +0200
Subject: [PATCH] Zero memory on allocation
---
kernel/src/allocator.rs | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/kernel/src/allocator.rs b/kernel/src/allocator.rs
index 5329844..bd225bf 100644
--- a/kernel/src/allocator.rs
+++ b/kernel/src/allocator.rs
@@ -150,7 +150,8 @@ impl Heap {
#[cfg(debug_assertions)]
trace!("Allocating {:?}", ptr);
}
- // FIXME: zero out memory to prevent leaking data
+
+ unsafe { core::ptr::write_bytes(ptr, 0, size) };
assert!(ptr.is_aligned_to(alignment));
NonNull::new(ptr)
@@ -168,6 +169,7 @@ impl Heap {
self.bitmap_set_range(start, size, false);
self.allocated_chunks -= size;
// FIXME: zero out memory to prevent leaking data
+ // REPLY: When we zero on alloc, do we really need it?
}
/// Finds first hole that can fit an allocation of `size` chunks, returns the start of the