Add comment on extra double deallocation check

1 files changed, 3 insertions, 0 deletions

diff --git a/arch/x86_64/include/arch/memory/heap/linked_list_allocator.hpp b/arch/x86_64/include/arch/memory/heap/linked_list_allocator.hpp
index e8ecc30..6af6298 100644
--- a/arch/x86_64/include/arch/memory/heap/linked_list_allocator.hpp
+++ b/arch/x86_64/include/arch/memory/heap/linked_list_allocator.hpp
@@ -74,6 +74,9 @@ namespace teachos::arch::memory::heap
      * increases by the amount in the current memory block header. After reading it we also clear the header.
      * 4. If the previous block is adjacent the size of the previous block simply increases to include the given size as
      * well.
+     * 5. If the previous block is directly in our start address, so they overlap then it has to mean some or all of the
+     * region we are trying to deallocate has been freed before. Which would result in a double free therefore we halt
+     * the execution of the program.
      *
      * @param previous_block Free memory block before the block to deallocate in our heap memory.
      * @param current_block Free memory block after the block to deallocate in our heap memory.