Re: [PATCH v5 1/2] module: verify address is read-only

[Jessica Yu]

+++ Eddie Kovsky [05/04/17 21:35 -0600]:
> Implement a mechanism to check if a module's address is in
> the rodata or ro_after_init sections. It mimics the existing functions
> that test if an address is inside a module's text section.
>
> Functions that take a module as an argument will be able to verify that the
> module address is in a read-only section. The idea is to prevent structures
> (including modules) that are not read-only from being passed to functions.
>
> This implements the first half of a suggestion made by Kees Cook for
> the Kernel Self Protection Project:
>
>    - provide mechanism to check for ro_after_init memory areas, and
>      reject structures not marked ro_after_init in vmbus_register()
>
> Suggested-by: Kees Cook <keescook@xxxxxxxxxxxx>
> Signed-off-by: Eddie Kovsky <ewk@xxxxxxxxxxxx>

Acked-by: Jessica Yu <jeyu@xxxxxxxxxx>