[nuttx] Security risk of erasing BSS only

[Sebastien Lorquet [e-mail] [nuttx]]

Hello,

Be careful with your linker scripts, specially if you use dedicated RAM sections:

https://saleemrashid.com/2017/08/17/extracting-trezor-secrets-sram/

Be sure you initialize or zeroize all of them.

Sebastien