[PATCH 0/2] scs: switch to vmapped shadow stacks
Sami Tolvanen
samitolvanen at google.com
Thu Oct 22 16:23:53 EDT 2020
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
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