Re: module: extend 'rodata=off' boot cmdline parameter to module mappings

[Jessica Yu]

+++ AKASHI Takahiro [14/11/16 15:15 +0900]:
> The current "rodata=off" parameter disables read-only kernel mappings
> under CONFIG_DEBUG_RODATA:
>    commit d2aa1acad22f ("mm/init: Add 'rodata=off' boot cmdline parameter
>    to disable read-only kernel mappings")
>
> This patch is a logical extension to module mappings ie. read-only mappings
> at module loading can be disabled even if CONFIG_DEBUG_SET_MODULE_RONX
> (mainly for debug use). Please note, however, that it only affects RO/RW
> permissions, keeping NX set.
>
> This is the first step to make CONFIG_DEBUG_SET_MODULE_RONX mandatory
> (always-on) in the future as CONFIG_DEBUG_RODATA on x86 and arm64.
>
> Suggested-by: and Acked-by: Mark Rutland <mark.rutland@xxxxxxx>
> Signed-off-by: AKASHI Takahiro <takahiro.akashi@xxxxxxxxxx>
> Reviewed-by: Kees Cook <keescook@xxxxxxxxxxxx>
> Cc: Rusty Russell <rusty@xxxxxxxxxxxxxxx>

Hi Rusty, could I get an (n)ack for this patch? :-)

Thanks!

Jessica