Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1493732

[PATCH 0/3] WX Checking for arm64

Show all headers | View raw

Hi,

This is an implementation to check for writable and executable pages on arm64.
This is heavily based on the x86 version which uses the existing page table
dumping code to do the checking. Some notes:

- The W^X checking is important so this option should become defaut eventually.
  To make this feasible, the debugfs functionality has been split out as a
  separate option. I didn't see a good way to make it modular like x86 but
  an option should be good enough.
- This checks all page tables registered with ptdump_register. I don't see this
  being called elsewhere right now though.
- Once this is merged, I'd like to see about moving DEBUG_WX to the top level
  instead of having each arch call it in mark_rodata.

Laura Abbott (3):
  arm64: dump: Make ptdump debugfs a separate option
  arm64: dump: Make the page table dumping seq_file optional
  arm64: dump: Add checking for writable and exectuable pages

 arch/arm64/Kconfig.debug        | 34 ++++++++++++++-
 arch/arm64/include/asm/ptdump.h | 25 ++++++++++-
 arch/arm64/mm/Makefile          |  3 +-
 arch/arm64/mm/dump.c            | 92 ++++++++++++++++++++++++++++-------------
 arch/arm64/mm/mmu.c             |  2 +
 arch/arm64/mm/ptdump_debugfs.c  | 33 +++++++++++++++
 6 files changed, 157 insertions(+), 32 deletions(-)
 create mode 100644 arch/arm64/mm/ptdump_debugfs.c

-- 
2.10.0

Back to linux.kernel | Previous | Next — Next in thread | Find similar | Unroll thread

Thread

[PATCH 0/3] WX Checking for arm64 Laura Abbott <labbott@redhat.com> - 2016-09-29 23:40 +0200
  [PATCH 3/3] arm64: dump: Add checking for writable and exectuable pages Laura Abbott <labbott@redhat.com> - 2016-09-29 23:40 +0200
    Re: [PATCH 3/3] arm64: dump: Add checking for writable and  exectuable pages Mark Rutland <mark.rutland@arm.com> - 2016-09-30 04:10 +0200
    Re: [PATCH 3/3] arm64: dump: Add checking for writable and  exectuable pages Mark Rutland <mark.rutland@arm.com> - 2016-09-30 18:00 +0200
      Re: [PATCH 3/3] arm64: dump: Add checking for writable and exectuable pages Kees Cook <keescook@chromium.org> - 2016-09-30 18:30 +0200
        Re: [PATCH 3/3] arm64: dump: Add checking for writable and  exectuable pages Mark Rutland <mark.rutland@arm.com> - 2016-09-30 18:50 +0200
          Re: [PATCH 3/3] arm64: dump: Add checking for writable and exectuable pages Kees Cook <keescook@chromium.org> - 2016-09-30 19:20 +0200
  [PATCH 2/3] arm64: dump: Make the page table dumping seq_file optional Laura Abbott <labbott@redhat.com> - 2016-09-29 23:40 +0200
    Re: [PATCH 2/3] arm64: dump: Make the page table dumping seq_file  optional Mark Rutland <mark.rutland@arm.com> - 2016-09-30 02:40 +0200
  [PATCH 1/3] arm64: dump: Make ptdump debugfs a separate option Laura Abbott <labbott@redhat.com> - 2016-09-29 23:40 +0200
    Re: [PATCH 1/3] arm64: dump: Make ptdump debugfs a separate option Mark Rutland <mark.rutland@arm.com> - 2016-09-30 02:30 +0200
      Re: [PATCH 1/3] arm64: dump: Make ptdump debugfs a separate option Laura Abbott <labbott@redhat.com> - 2016-09-30 02:40 +0200
        Re: [PATCH 1/3] arm64: dump: Make ptdump debugfs a separate option Mark Rutland <mark.rutland@arm.com> - 2016-09-30 02:50 +0200
          Re: [PATCH 1/3] arm64: dump: Make ptdump debugfs a separate option Laura Abbott <labbott@redhat.com> - 2016-09-30 03:20 +0200
            Re: [PATCH 1/3] arm64: dump: Make ptdump debugfs a separate option Mark Rutland <mark.rutland@arm.com> - 2016-09-30 03:30 +0200
  Re: [kernel-hardening] [PATCH 0/3] WX Checking for arm64 Kees Cook <keescook@chromium.org> - 2016-09-30 03:30 +0200

csiph-web