If kernel stack variables are not initialized properly,
there is a chance of kernel information disclosure.
So, initialize kernel stack variables with null characters.
CRs-fixed: 2042592
Change-Id: I213c0e5c7f67824c2cecace276ff2f8f81599d51
Signed-off-by: Sai Krishna Juturi <jsaikrishna@codeaurora.org>
Signed-off-by: Mayank Rana <mrana@codeaurora.org>