From: Sami Tolvanen <samitolvanen@google.com>
To: Will Deacon <will@kernel.org>, Catalin Marinas <catalin.marinas@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>,
James Morse <james.morse@arm.com>,
Ard Biesheuvel <ard.biesheuvel@linaro.org>,
Kees Cook <keescook@chromium.org>,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org,
Sami Tolvanen <samitolvanen@google.com>
Subject: [PATCH 0/2] scs: switch to vmapped shadow stacks
Date: Thu, 22 Oct 2020 13:23:53 -0700 [thread overview]
Message-ID: <20201022202355.3529836-1-samitolvanen@google.com> (raw)
As discussed a few months ago [1][2], virtually mapped shadow call stacks
are better for safety and robustness. This series dusts off the VMAP
option from the original SCS patch series and switches the kernel to use
virtually mapped shadow stacks unconditionally when SCS is enabled.
[1] https://lore.kernel.org/lkml/20200515172355.GD23334@willie-the-truck/
[2] https://lore.kernel.org/lkml/20200427220942.GB80713@google.com/
Sami Tolvanen (2):
scs: switch to vmapped shadow stacks
arm64: scs: use vmapped IRQ and SDEI shadow stacks
arch/arm64/include/asm/scs.h | 21 ++++++++++-
arch/arm64/kernel/entry.S | 6 ++--
arch/arm64/kernel/irq.c | 2 ++
arch/arm64/kernel/scs.c | 67 +++++++++++++++++++++++++++++++++---
arch/arm64/kernel/sdei.c | 7 ++++
include/linux/scs.h | 15 +++-----
kernel/scs.c | 67 ++++++++++++++++++++++++++++++------
7 files changed, 156 insertions(+), 29 deletions(-)
base-commit: 96485e4462604744d66bf4301557d996d80b85eb
--
2.29.0.rc1.297.gfa9743e501-goog
next reply other threads:[~2020-10-22 20:24 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-22 20:23 Sami Tolvanen [this message]
2020-10-22 20:23 ` [PATCH 1/2] scs: switch to vmapped shadow stacks Sami Tolvanen
2020-10-22 22:38 ` Kees Cook
2020-11-19 13:00 ` Will Deacon
2020-11-20 17:00 ` Sami Tolvanen
2020-11-23 11:08 ` Will Deacon
2020-10-22 20:23 ` [PATCH 2/2] arm64: scs: use vmapped IRQ and SDEI " Sami Tolvanen
2020-10-22 22:38 ` Kees Cook
2020-11-19 13:11 ` Will Deacon
2020-11-17 17:35 ` [PATCH 0/2] scs: switch to vmapped " Catalin Marinas
2020-11-18 9:27 ` Will Deacon
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