Re: [PATCH v5 30/75] x86/head/64: Setup MSR_GS_BASE before calling into C code
From: Kees Cook
Date: Fri Jul 24 2020 - 13:42:24 EST
On Fri, Jul 24, 2020 at 06:02:51PM +0200, Joerg Roedel wrote:
> From: Joerg Roedel <jroedel@xxxxxxx>
>
> When stack-protector is enabled a valid GS_BASE is needed before
> calling any C code function, because the stack canary is loaded from
> per-cpu data.
>
> Signed-off-by: Joerg Roedel <jroedel@xxxxxxx>
Reviewed-by: Kees Cook <keescook@xxxxxxxxxxxx>
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Kees Cook