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Message-Id: <20181106214404.2497-1-ard.biesheuvel@linaro.org>
Date: Tue, 6 Nov 2018 22:44:02 +0100
From: Ard Biesheuvel <ard.biesheuvel@...aro.org>
To: linux-arm-kernel@...ts.infradead.org
Cc: keescook@...omium.org,
kernel-hardening@...ts.openwall.com,
labbott@...hat.com,
will.deacon@....com,
jannh@...gle.com,
mark.rutland@....com,
james.morse@....com,
catalin.marinas@....com,
Ard Biesheuvel <ard.biesheuvel@...aro.org>
Subject: [PATCH v3 0/2]get rid of writable linear aliases of read-only vmalloc mappings
This is a followup to my patch 'arm64/mm: unmap the linear alias of module
allocations'.
This version changes the approach to match what x86 does, i.e., to deal
with the linear alias at a more fundamental level, in the set_memory_ro/rw
routines.
Ard Biesheuvel (2):
arm64: mm: purge lazily unmapped vm regions before changing
permissions
arm64: mm: apply r/o permissions of VM areas to its linear alias as
well
arch/arm64/Kconfig | 14 ++++++++
arch/arm64/include/asm/mmu_context.h | 2 ++
arch/arm64/mm/mmu.c | 2 +-
arch/arm64/mm/pageattr.c | 36 +++++++++++++++++---
4 files changed, 48 insertions(+), 6 deletions(-)
--
2.19.1
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