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Message-Id: <20190221093601.27920-1-ruscur@russell.cc>
Date: Thu, 21 Feb 2019 20:35:54 +1100
From: Russell Currey <ruscur@...sell.cc>
To: linuxppc-dev@...ts.ozlabs.org
Cc: mpe@...erman.id.au,
npiggin@...il.com,
christophe.leroy@....fr,
kernel-hardening@...ts.openwall.com,
Russell Currey <ruscur@...sell.cc>
Subject: [PATCH 0/7] Kernel Userspace Protection for radix
The first three patches of these series are from Christophe's work and are
the bare minimum framework needed to implement the support for radix.
In patch 3, I have removed from Christophe's patch my implementation of
the 64-bit exception handling code, since we don't have an answer for
making nested exceptions work yet. This is mentioned in the final KUAP
patch. Regardless, this is still a significant security improvement
and greatly narrows the attack surface.
Here are patches you will want if you want this to work:
http://patchwork.ozlabs.org/patch/1045215/
http://patchwork.ozlabs.org/patch/1045049/
http://patchwork.ozlabs.org/patch/1038568/
(or subsequent revisions, which the latter two will need)
I wouldn't expect this series to be merged without those fixes.
Thanks to Christophe for his great work and to Michael Ellerman for a
ton of feedback as I've worked on this.
Christophe Leroy (3):
powerpc: Add framework for Kernel Userspace Protection
powerpc: Add skeleton for Kernel Userspace Execution Prevention
powerpc/mm: Add a framework for Kernel Userspace Access Protection
Russell Currey (4):
powerpc/64: Setup KUP on secondary CPUs
powerpc/mm/radix: Use KUEP API for Radix MMU
powerpc/lib: Refactor __patch_instruction() to use __put_user_asm()
powerpc/64s: Implement KUAP for Radix MMU
.../admin-guide/kernel-parameters.txt | 4 +-
.../powerpc/include/asm/book3s/64/kup-radix.h | 36 ++++++++++++++++
arch/powerpc/include/asm/exception-64e.h | 3 ++
arch/powerpc/include/asm/exception-64s.h | 3 ++
arch/powerpc/include/asm/futex.h | 4 ++
arch/powerpc/include/asm/kup.h | 42 +++++++++++++++++++
arch/powerpc/include/asm/mmu.h | 9 +++-
arch/powerpc/include/asm/paca.h | 3 ++
arch/powerpc/include/asm/processor.h | 3 ++
arch/powerpc/include/asm/ptrace.h | 3 ++
arch/powerpc/include/asm/reg.h | 1 +
arch/powerpc/include/asm/uaccess.h | 38 +++++++++++++----
arch/powerpc/kernel/asm-offsets.c | 7 ++++
arch/powerpc/kernel/entry_32.S | 8 +++-
arch/powerpc/kernel/process.c | 3 ++
arch/powerpc/kernel/setup_64.c | 10 +++++
arch/powerpc/lib/checksum_wrappers.c | 4 ++
arch/powerpc/lib/code-patching.c | 4 +-
arch/powerpc/mm/fault.c | 20 ++++++---
arch/powerpc/mm/init-common.c | 26 ++++++++++++
arch/powerpc/mm/init_32.c | 3 ++
arch/powerpc/mm/pgtable-radix.c | 28 +++++++++++--
arch/powerpc/mm/pkeys.c | 7 +++-
arch/powerpc/platforms/Kconfig.cputype | 26 ++++++++++++
24 files changed, 271 insertions(+), 24 deletions(-)
create mode 100644 arch/powerpc/include/asm/book3s/64/kup-radix.h
create mode 100644 arch/powerpc/include/asm/kup.h
--
2.20.1
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