Re: [PATCH v4 21/36] arm64/mm: Implement map_shadow_stack()
From: Mark Brown <broonie@kernel.org>
Date: 2023-08-18 17:09:38
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kvmarm, linux-arch, linux-arm-kernel, linux-fsdevel, linux-kselftest, linux-mm, linux-riscv, lkml
On Fri, Aug 11, 2023 at 05:38:24PM +0100, Catalin Marinas wrote:
Given that we won't have an mmap(PROT_SHADOW_STACK), are we going to have restrictions on mprotect()? E.g. it would be useful to reject a PROT_EXEC on the shadow stack.
mprotect() uses arch_validate_flags() which we're already having cover this so it's already covered.
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