[PATCH v5 0/5] Implement STRICT_MODULE_RWX for powerpc

Russell Currey
2019-10-30T07:31:56Z

v4 cover letter: https://lists.ozlabs.org/pipermail/linuxppc-dev/2019-October/198268.html
v3 cover letter: https://lists.ozlabs.org/pipermail/linuxppc-dev/2019-October/198023.html

Changes since v4:
[1/5]: Addressed review comments from Michael Ellerman (thanks!)
[4/5]: make ARCH_HAS_STRICT_MODULE_RWX depend on
ARCH_HAS_STRICT_KERNEL_RWX to simplify things and avoid
STRICT_MODULE_RWX being *on by default* in cases where
STRICT_KERNEL_RWX is *unavailable*
[5/5]: split skiroot_defconfig changes out into its own patch

The whole Kconfig situation is really weird and confusing, I believe the
correct resolution is to change arch/Kconfig but the consequences are so
minor that I don't think it's worth it, especially given that I expect
powerpc to have mandatory strict RWX Soon(tm).

Russell Currey (5):
powerpc/mm: Implement set_memory() routines
powerpc/kprobes: Mark newly allocated probes as RO
powerpc/mm/ptdump: debugfs handler for W+X checks at runtime
powerpc: Set ARCH_HAS_STRICT_MODULE_RWX
powerpc/configs: Enable STRICT_MODULE_RWX in skiroot_defconfig

arch/powerpc/Kconfig | 2 +
arch/powerpc/Kconfig.debug | 6 +-
arch/powerpc/configs/skiroot_defconfig | 1 +
arch/powerpc/include/asm/set_memory.h | 32 +++++++++++
arch/powerpc/kernel/kprobes.c | 3 +
arch/powerpc/mm/Makefile | 1 +
arch/powerpc/mm/pageattr.c | 77 ++++++++++++++++++++++++++
arch/powerpc/mm/ptdump/ptdump.c | 21 ++++++-
8 files changed, 140 insertions(+), 3 deletions(-)
create mode 100644 arch/powerpc/include/asm/set_memory.h
create mode 100644 arch/powerpc/mm/pageattr.c

--
2.23.0