Re: [PATCH] vmlinux.lds.h: Fix placement of '.data..decrypted' section

From: Kees Cook
Date: Tue Nov 08 2022 - 13:00:27 EST


On Tue, 8 Nov 2022 10:49:34 -0700, Nathan Chancellor wrote:
> Commit d4c639990036 ("vmlinux.lds.h: Avoid orphan section with !SMP")
> fixed an orphan section warning by adding the '.data..decrypted' section
> to the linker script under the PERCPU_DECRYPTED_SECTION define but that
> placement introduced a panic with !SMP, as the percpu sections are not
> instantiated with that configuration so attempting to access variables
> defined with DEFINE_PER_CPU_DECRYPTED() will result in a page fault.
>
> [...]

Applied to for-linus/hardening, thanks!

[1/1] vmlinux.lds.h: Fix placement of '.data..decrypted' section
https://git.kernel.org/kees/c/000f8870a47b

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Kees Cook