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Date: Thu, 9 May 2019 08:38:28 -0700
From: Sami Tolvanen <>
To: Eric Biggers <>
Cc: Kees Cook <>,
	Herbert Xu <>,
	Joao Moreira <>, Ingo Molnar <>,
	Thomas Gleixner <>,
	Borislav Petkov <>, X86 ML <>,
	linux-crypto <>,
	LKML <>,
	Kernel Hardening <>
Subject: Re: [PATCH v3 0/7] crypto: x86: Fix indirect function call casts

On Wed, May 08, 2019 at 07:04:40PM -0700, Eric Biggers wrote:
> And I also asked whether indirect calls to asm code are even allowed
> with CFI. IIRC, the AOSP kernels have been patched to remove them from
> arm64

At least with clang, indirect calls to stand-alone assembly functions
trip CFI checks, which is why Android kernels use static inline stubs
to convert these to direct calls instead.


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