Who is responsible for deallocating memory reserved in the .bss section of an image?

If I reserve memory in the .BSS section of an image, am I responsable for deallocating that memory before the process terminates and if so how do I go about doing this?

Here's some example code to clarify

SECTIION .text
GLOBAL _start
_start:
mov edx, buffer
movb [edx], 30h ; Initializes buffer which was reserved in .bss
...

SECTION .bss
buffer: RESB 2 ; Reserves 2 bytes开发者_开发知识库 in .bss section

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The loader allocates that memory before your process starts executing, and the kernel will automatically reclaim it when your process exits. You do not need to worry about it.