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SubjectRe: [PATCH 0/4] x86: Various clean-ups in support of FGKASLR
On Wed, Oct 13, 2021 at 10:57:38AM -0700, Kees Cook wrote:
> Hi,
>
> These are a small set of patches that clean up various things that are
> each stand-alone improvements, but they're also needed for the coming
> FGKASLR series[1]. I thought it best to just get these landed instead
> of having them continue to tag along with FGKASLR, especially the
> early malloc() fix, which is a foot-gun waiting to happen. :)
>
> Thanks!
>
> -Kees
>
> [1] https://lore.kernel.org/lkml/20210831144114.154-1-alexandr.lobakin@intel.com/

Peter, Josh, Boris, can someone please take these through -tip?

They're each stand-alone correctness improvements, and while FGKASLR
depends on them, there is no reason to keep them tied to that series,
especially since anyone using the early-boot malloc or making changes to
text sections is going to trip over one or several of the issues fixed
here.

They've got a bunch of reviews and acks already:
https://patchwork.kernel.org/project/linux-hardening/list/?series=562929

Thanks!

-Kees

>
> Kees Cook (2):
> x86/boot: Allow a "silent" kaslr random byte fetch
> x86/boot/compressed: Avoid duplicate malloc() implementations
>
> Kristen Carlson Accardi (2):
> x86/tools/relocs: Support >64K section headers
> vmlinux.lds.h: Have ORC lookup cover entire _etext - _stext
>
> arch/x86/boot/compressed/kaslr.c | 4 --
> arch/x86/boot/compressed/misc.c | 3 +
> arch/x86/boot/compressed/misc.h | 2 +
> arch/x86/lib/kaslr.c | 18 ++++--
> arch/x86/tools/relocs.c | 103 ++++++++++++++++++++++--------
> include/asm-generic/vmlinux.lds.h | 3 +-
> include/linux/decompress/mm.h | 12 +++-
> 7 files changed, 107 insertions(+), 38 deletions(-)
>
> --
> 2.30.2
>

--
Kees Cook

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