[PATCH] powerpc/rtas: Prevent Spectre v1 gadget construction in sys_rtas()

[Michael Ellerman]

On Thu, 30 May 2024 19:44:12 -0500, Nathan Lynch wrote:
> Smatch warns:
> 
>   arch/powerpc/kernel/rtas.c:1932 __do_sys_rtas() warn: potential
>   spectre issue 'args.args' [r] (local cap)
> 
> The 'nargs' and 'nret' locals come directly from a user-supplied
> buffer and are used as indexes into a small stack-based array and as
> inputs to copy_to_user() after they are subject to bounds checks.
> 
> [...]

Applied to powerpc/next.

[1/1] powerpc/rtas: Prevent Spectre v1 gadget construction in sys_rtas()
      https://git.kernel.org/powerpc/c/0974d03eb479384466d828d65637814bee6b26d7

cheers