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* [PATCH 00/24] Kernel lockdown
@ 2017-04-05 20:14 ` David Howells
  0 siblings, 0 replies; 213+ messages in thread
From: David Howells @ 2017-04-05 20:14 UTC (permalink / raw)
  To: linux-kernel
  Cc: gnomes, linux-efi, matthew.garrett, gregkh, dhowells,
	linux-security-module, keyrings


These patches provide a facility by which a variety of avenues by which
userspace can feasibly modify the running kernel image can be locked down.
These include:

 (*) No unsigned modules and no modules for which can't validate the
     signature.

 (*) No use of ioperm(), iopl() and no writing to /dev/port.

 (*) No writing to /dev/mem or /dev/kmem.

 (*) No hibernation.

 (*) Restrict PCI BAR access.

 (*) Restrict MSR access.

 (*) No kexec_load().

 (*) Certain ACPI restrictions.

 (*) Restrict debugfs interface to ASUS WMI.

The lock-down can be configured to be triggered by the EFI secure boot
status, provided the shim isn't insecure.  The lock-down can be lifted by
typing SysRq+x on a keyboard attached to the system.


The patches can be found here also:

	http://git.kernel.org/cgit/linux/kernel/git/dhowells/linux-fs.git/log/?h=efi-lockdown

They are dependent on the hwparam branch, which I posted separately.

David
---
Chun-Yi Lee (2):
      kexec_file: Disable at runtime if securelevel has been set
      bpf: Restrict kernel image access functions when the kernel is locked down

Dave Young (1):
      Copy secure_boot flag in boot params across kexec reboot

David Howells (7):
      Add the ability to lock down access to the running kernel image
      efi: Lock down the kernel if booted in secure boot mode
      Enforce module signatures if the kernel is locked down
      scsi: Lock down the eata driver
      Prohibit PCMCIA CIS storage when the kernel is locked down
      Lock down TIOCSSERIAL
      Lock down module params that specify hardware parameters (eg. ioport)

Josh Boyer (3):
      efi: Add EFI_SECURE_BOOT bit
      hibernate: Disable when the kernel is locked down
      acpi: Ignore acpi_rsdp kernel param when the kernel has been locked down

Kyle McMartin (1):
      Add a sysrq option to exit secure boot mode

Linn Crosetto (2):
      acpi: Disable ACPI table override if the kernel is locked down
      acpi: Disable APEI error injection if the kernel is locked down

Matthew Garrett (8):
      Restrict /dev/mem and /dev/kmem when the kernel is locked down
      kexec: Disable at runtime if the kernel is locked down
      uswsusp: Disable when the kernel is locked down
      PCI: Lock down BAR access when the kernel is locked down
      x86: Lock down IO port access when the kernel is locked down
      x86: Restrict MSR access when the kernel is locked down
      asus-wmi: Restrict debugfs interface when the kernel is locked down
      ACPI: Limit access to custom_method when the kernel is locked down


 arch/x86/Kconfig                  |   22 ++++++++++++++++++++
 arch/x86/kernel/ioport.c          |    4 ++--
 arch/x86/kernel/kexec-bzimage64.c |    1 +
 arch/x86/kernel/msr.c             |    7 ++++++
 arch/x86/kernel/setup.c           |   40 ++++++++++++++++++++++++++++++++++++-
 drivers/acpi/apei/einj.c          |    3 +++
 drivers/acpi/custom_method.c      |    3 +++
 drivers/acpi/osl.c                |    2 +-
 drivers/acpi/tables.c             |    5 +++++
 drivers/char/mem.c                |    8 +++++++
 drivers/input/misc/uinput.c       |    1 +
 drivers/pci/pci-sysfs.c           |    9 ++++++++
 drivers/pci/proc.c                |    8 ++++++-
 drivers/pci/syscall.c             |    2 +-
 drivers/pcmcia/cistpl.c           |    5 +++++
 drivers/platform/x86/asus-wmi.c   |    9 ++++++++
 drivers/scsi/eata.c               |    7 ++++++
 drivers/tty/serial/serial_core.c  |    6 ++++++
 drivers/tty/sysrq.c               |   19 ++++++++++++------
 include/linux/efi.h               |    1 +
 include/linux/input.h             |    5 +++++
 include/linux/kernel.h            |    9 ++++++++
 include/linux/security.h          |   11 ++++++++++
 include/linux/sysrq.h             |    8 ++++++-
 kernel/debug/kdb/kdb_main.c       |    2 +-
 kernel/kexec.c                    |    7 ++++++
 kernel/kexec_file.c               |    6 ++++++
 kernel/module.c                   |    2 +-
 kernel/params.c                   |   27 ++++++++++++++++++++-----
 kernel/power/hibernate.c          |    2 +-
 kernel/power/user.c               |    3 +++
 kernel/trace/bpf_trace.c          |   11 ++++++++++
 security/Kconfig                  |   15 ++++++++++++++
 security/Makefile                 |    3 +++
 security/lock_down.c              |   40 +++++++++++++++++++++++++++++++++++++
 35 files changed, 291 insertions(+), 22 deletions(-)
 create mode 100644 security/lock_down.c

^ permalink raw reply	[flat|nested] 213+ messages in thread
* [PATCH 00/24] Kernel lockdown
@ 2017-04-05 17:09 David Howells
  2017-04-05 17:12   ` David Howells
  0 siblings, 1 reply; 213+ messages in thread
From: David Howells @ 2017-04-05 17:09 UTC (permalink / raw)
  To: linux-kernel
  Cc: gnomes, linux-efi, matthew.garrett, gregkh, dhowells,
	linux-security-module, keyrings


These patches provide a facility by which a variety of avenues by which
userspace can feasibly modify the running kernel image can be locked down.
These include:

 (*) No unsigned modules and no modules for which can't validate the
     signature.

 (*) No use of ioperm(), iopl() and no writing to /dev/port.

 (*) No writing to /dev/mem or /dev/kmem.

 (*) No hibernation.

 (*) Restrict PCI BAR access.

 (*) Restrict MSR access.

 (*) No kexec_load().

 (*) Certain ACPI restrictions.

 (*) Restrict debugfs interface to ASUS WMI.

The lock-down can be configured to be triggered by the EFI secure boot
status, provided the shim isn't insecure.  The lock-down can be lifted by
typing SysRq+x on a keyboard attached to the system.


The patches can be found here also:

	http://git.kernel.org/cgit/linux/kernel/git/dhowells/linux-fs.git/log/?h=efi-lockdown

They are dependent on the hwparam branch, which I posted separately.

David
---
Chun-Yi Lee (1):
      kexec_file: Disable at runtime if securelevel has been set

Dave Young (1):
      Copy secure_boot flag in boot params across kexec reboot

David Howells (7):
      Add the ability to lock down access to the running kernel image
      efi: Lock down the kernel if booted in secure boot mode
      Enforce module signatures if the kernel is locked down
      scsi: Lock down the eata driver
      Prohibit PCMCIA CIS storage when the kernel is locked down
      Lock down TIOCSSERIAL
      Lock down module params that specify hardware parameters (eg. ioport)

Josh Boyer (3):
      efi: Add EFI_SECURE_BOOT bit
      hibernate: Disable when the kernel is locked down
      acpi: Ignore acpi_rsdp kernel param when the kernel has been locked down

Kyle McMartin (1):
      Add a sysrq option to exit secure boot mode

Lee, Chun-Yi (1):
      bpf: Restrict kernel image access functions when the kernel is locked down

Linn Crosetto (2):
      acpi: Disable ACPI table override if the kernel is locked down
      acpi: Disable APEI error injection if the kernel is locked down

Matthew Garrett (8):
      Restrict /dev/mem and /dev/kmem when the kernel is locked down
      kexec: Disable at runtime if the kernel is locked down
      uswsusp: Disable when the kernel is locked down
      PCI: Lock down BAR access when the kernel is locked down
      x86: Lock down IO port access when the kernel is locked down
      x86: Restrict MSR access when the kernel is locked down
      asus-wmi: Restrict debugfs interface when the kernel is locked down
      ACPI: Limit access to custom_method when the kernel is locked down


 arch/x86/Kconfig                  |   22 ++++++++++++++++++++
 arch/x86/kernel/ioport.c          |    4 ++--
 arch/x86/kernel/kexec-bzimage64.c |    1 +
 arch/x86/kernel/msr.c             |    7 ++++++
 arch/x86/kernel/setup.c           |   40 ++++++++++++++++++++++++++++++++++++-
 drivers/acpi/apei/einj.c          |    3 +++
 drivers/acpi/custom_method.c      |    3 +++
 drivers/acpi/osl.c                |    2 +-
 drivers/acpi/tables.c             |    5 +++++
 drivers/char/mem.c                |    8 +++++++
 drivers/input/misc/uinput.c       |    1 +
 drivers/pci/pci-sysfs.c           |    9 ++++++++
 drivers/pci/proc.c                |    8 ++++++-
 drivers/pci/syscall.c             |    2 +-
 drivers/pcmcia/cistpl.c           |    5 +++++
 drivers/platform/x86/asus-wmi.c   |    9 ++++++++
 drivers/scsi/eata.c               |    7 ++++++
 drivers/tty/serial/serial_core.c  |    6 ++++++
 drivers/tty/sysrq.c               |   19 ++++++++++++------
 include/linux/efi.h               |    1 +
 include/linux/input.h             |    5 +++++
 include/linux/kernel.h            |    9 ++++++++
 include/linux/security.h          |   11 ++++++++++
 include/linux/sysrq.h             |    8 ++++++-
 kernel/debug/kdb/kdb_main.c       |    2 +-
 kernel/kexec.c                    |    7 ++++++
 kernel/kexec_file.c               |    6 ++++++
 kernel/module.c                   |    2 +-
 kernel/params.c                   |   27 ++++++++++++++++++++-----
 kernel/power/hibernate.c          |    2 +-
 kernel/power/user.c               |    3 +++
 kernel/trace/bpf_trace.c          |   11 ++++++++++
 security/Kconfig                  |   15 ++++++++++++++
 security/Makefile                 |    3 +++
 security/lock_down.c              |   40 +++++++++++++++++++++++++++++++++++++
 35 files changed, 291 insertions(+), 22 deletions(-)
 create mode 100644 security/lock_down.c

^ permalink raw reply	[flat|nested] 213+ messages in thread

end of thread, other threads:[~2017-05-02 19:02 UTC | newest]

Thread overview: 213+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2017-04-05 20:14 [PATCH 00/24] Kernel lockdown David Howells
2017-04-05 20:14 ` David Howells
2017-04-05 20:14 ` [PATCH 01/24] efi: Add EFI_SECURE_BOOT bit David Howells
2017-04-05 20:14   ` David Howells
2017-04-06  8:26   ` Ard Biesheuvel
2017-04-06  8:26     ` Ard Biesheuvel
2017-04-06  8:48   ` David Howells
2017-04-06  8:48     ` David Howells
2017-04-05 20:14 ` [PATCH 02/24] Add the ability to lock down access to the running kernel image David Howells
2017-04-05 20:14   ` David Howells
2017-04-05 20:14   ` David Howells
2017-04-05 20:14 ` [PATCH 03/24] efi: Lock down the kernel if booted in secure boot mode David Howells
2017-04-05 20:14   ` David Howells
2017-04-05 20:15 ` [PATCH 04/24] Enforce module signatures if the kernel is locked down David Howells
2017-04-05 20:15   ` David Howells
2017-04-05 20:15 ` [PATCH 05/24] Restrict /dev/mem and /dev/kmem when " David Howells
2017-04-05 20:15   ` David Howells
2017-04-05 20:15 ` [PATCH 06/24] Add a sysrq option to exit secure boot mode David Howells
2017-04-05 20:15   ` David Howells
2017-04-14 18:05   ` Thomas Gleixner
2017-04-14 18:05     ` Thomas Gleixner
2017-04-14 18:05     ` Thomas Gleixner
2017-04-14 18:15     ` Ard Biesheuvel
2017-04-14 18:15       ` Ard Biesheuvel
2017-04-14 18:15       ` Ard Biesheuvel
2017-04-14 23:16     ` David Howells
2017-04-14 23:16       ` David Howells
2017-04-14 23:16       ` David Howells
2017-04-16 20:46     ` Matt Fleming
2017-04-16 20:46       ` Matt Fleming
2017-04-16 20:46       ` Matt Fleming
2017-04-05 20:15 ` [PATCH 07/24] kexec: Disable at runtime if the kernel is locked down David Howells
2017-04-05 20:15   ` David Howells
2017-04-05 20:15   ` David Howells
2017-04-07  3:07   ` Dave Young
2017-04-07  3:07     ` Dave Young
2017-04-07  3:07     ` Dave Young
2017-04-07  3:07     ` Dave Young
2017-04-05 20:15 ` [PATCH 08/24] Copy secure_boot flag in boot params across kexec reboot David Howells
2017-04-05 20:15   ` David Howells
2017-04-05 20:15   ` David Howells
2017-04-05 20:15 ` [PATCH 09/24] kexec_file: Disable at runtime if securelevel has been set David Howells
2017-04-05 20:15   ` David Howells
2017-04-05 20:15   ` David Howells
2017-04-05 20:15   ` David Howells
2017-04-07  3:05   ` Dave Young
2017-04-07  3:05     ` Dave Young
2017-04-07  3:05     ` Dave Young
2017-04-07  3:05     ` Dave Young
2017-04-07  3:49     ` Mimi Zohar
2017-04-07  3:49       ` Mimi Zohar
2017-04-07  3:49       ` Mimi Zohar
2017-04-07  6:19       ` Dave Young
2017-04-07  6:19         ` Dave Young
2017-04-07  6:19         ` Dave Young
2017-04-07  6:19         ` Dave Young
2017-04-07  7:45         ` Mimi Zohar
2017-04-07  7:45           ` Mimi Zohar
2017-04-07  7:45           ` Mimi Zohar
2017-04-07  8:01           ` Dave Young
2017-04-07  8:01             ` Dave Young
2017-04-07  8:01             ` Dave Young
2017-04-07  7:07       ` David Howells
2017-04-07  7:07         ` David Howells
2017-04-07  7:07         ` David Howells
2017-04-07  7:41         ` Dave Young
2017-04-07  7:41           ` Dave Young
2017-04-07  7:41           ` Dave Young
2017-04-07  7:41           ` Dave Young
2017-04-07  8:28           ` Mimi Zohar
2017-04-07  8:28             ` Mimi Zohar
2017-04-07  8:28             ` Mimi Zohar
2017-04-07  8:28             ` Mimi Zohar
2017-04-07  8:42             ` Dave Young
2017-04-07  8:42               ` Dave Young
2017-04-07  8:42               ` Dave Young
2017-04-07  8:42               ` Dave Young
2017-04-07  7:09     ` David Howells
2017-04-07  7:09       ` David Howells
2017-04-07  7:09       ` David Howells
2017-04-07  7:46       ` Mimi Zohar
2017-04-07  7:46         ` Mimi Zohar
2017-04-07  7:46         ` Mimi Zohar
2017-04-07  9:17       ` David Howells
2017-04-07  9:17         ` David Howells
2017-04-07  9:17         ` David Howells
2017-04-07 12:36         ` Mimi Zohar
2017-04-07 12:36           ` Mimi Zohar
2017-04-07 12:36           ` Mimi Zohar
2017-04-10 13:19         ` David Howells
2017-04-10 13:19           ` David Howells
2017-04-10 13:19           ` David Howells
2017-05-02 19:01           ` Mimi Zohar
2017-05-02 19:01             ` Mimi Zohar
2017-05-02 19:01             ` Mimi Zohar
2017-05-02 19:01             ` Mimi Zohar
2017-04-05 20:16 ` [PATCH 10/24] hibernate: Disable when the kernel is locked down David Howells
2017-04-05 20:16   ` David Howells
2017-04-05 20:16 ` [PATCH 11/24] uswsusp: " David Howells
2017-04-05 20:16   ` David Howells
2017-04-05 23:38   ` Rafael J. Wysocki
2017-04-05 23:38     ` Rafael J. Wysocki
2017-04-05 23:38     ` Rafael J. Wysocki
2017-04-06  6:39     ` Oliver Neukum
2017-04-06  6:39       ` Oliver Neukum
2017-04-06  8:41     ` David Howells
2017-04-06  8:41       ` David Howells
2017-04-06 20:09       ` Rafael J. Wysocki
2017-04-06 20:09         ` Rafael J. Wysocki
2017-04-06 20:09         ` Rafael J. Wysocki
2017-04-06 20:12         ` Rafael J. Wysocki
2017-04-06 20:12           ` Rafael J. Wysocki
2017-04-06 20:25           ` Jiri Kosina
2017-04-06 20:25             ` Jiri Kosina
2017-04-08  3:28             ` poma
2017-04-08  3:28               ` poma
2017-04-12 13:44               ` joeyli
2017-04-12 13:44                 ` joeyli
2017-04-06  6:55   ` David Howells
2017-04-06  6:55     ` David Howells
2017-04-06 20:07     ` Rafael J. Wysocki
2017-04-06 20:07       ` Rafael J. Wysocki
2017-04-05 20:16 ` [PATCH 12/24] PCI: Lock down BAR access " David Howells
2017-04-05 20:16   ` David Howells
2017-04-18 17:50   ` Bjorn Helgaas
2017-04-18 17:50     ` Bjorn Helgaas
2017-04-18 17:50     ` Bjorn Helgaas
2017-04-05 20:16 ` [PATCH 13/24] x86: Lock down IO port " David Howells
2017-04-05 20:16   ` David Howells
2017-04-05 20:16   ` David Howells
2017-04-14 18:28   ` Thomas Gleixner
2017-04-14 18:28     ` Thomas Gleixner
2017-04-14 18:28     ` Thomas Gleixner
2017-04-05 20:16 ` [PATCH 14/24] x86: Restrict MSR " David Howells
2017-04-05 20:16   ` David Howells
2017-04-14 18:30   ` Thomas Gleixner
2017-04-14 18:30     ` Thomas Gleixner
2017-04-05 20:16 ` [PATCH 15/24] asus-wmi: Restrict debugfs interface " David Howells
2017-04-05 20:16   ` David Howells
2017-04-07 10:25   ` Andy Shevchenko
2017-04-07 10:25     ` Andy Shevchenko
2017-04-07 12:50   ` David Howells
2017-04-07 12:50     ` David Howells
2017-04-09 11:10     ` Andy Shevchenko
2017-04-09 11:10       ` Andy Shevchenko
2017-04-10 13:16     ` David Howells
2017-04-10 13:16       ` David Howells
2017-04-18  6:06       ` Andy Shevchenko
2017-04-18  6:06         ` Andy Shevchenko
2017-04-18  6:06         ` Andy Shevchenko
2017-04-18 14:34         ` Ben Hutchings
2017-04-18 14:34           ` Ben Hutchings
2017-04-18 14:55         ` David Howells
2017-04-18 14:55           ` David Howells
2017-04-18 14:55           ` David Howells
2017-04-18 15:19           ` Ben Hutchings
2017-04-18 15:19             ` Ben Hutchings
2017-04-18 15:34           ` David Howells
2017-04-18 15:34             ` David Howells
2017-04-18 15:34             ` David Howells
2017-04-18 15:30         ` David Howells
2017-04-18 15:30           ` David Howells
2017-04-18 17:39           ` Ben Hutchings
2017-04-18 17:39             ` Ben Hutchings
2017-04-18 17:39             ` Ben Hutchings
2017-04-05 20:16 ` [PATCH 16/24] ACPI: Limit access to custom_method " David Howells
2017-04-05 20:16   ` David Howells
2017-04-05 20:16 ` [PATCH 17/24] acpi: Ignore acpi_rsdp kernel param when the kernel has been " David Howells
2017-04-05 20:16   ` David Howells
2017-04-06 19:43   ` Rafael J. Wysocki
2017-04-06 19:43     ` Rafael J. Wysocki
2017-04-07  6:31     ` Dave Young
2017-04-07  6:31       ` Dave Young
     [not found]     ` <20170407063107.GA10451-0VdLhd/A9Pl+NNSt+8eSiB/sF2h8X+2i0E9HWUfgJXw@public.gmane.org>
2017-04-07  7:05       ` David Howells
2017-04-07  7:05         ` David Howells
2017-04-07  7:05         ` David Howells
2017-04-07  7:39         ` Dave Young
2017-04-07  7:39           ` Dave Young
2017-04-05 20:17 ` [PATCH 18/24] acpi: Disable ACPI table override if the kernel is " David Howells
2017-04-05 20:17   ` David Howells
2017-04-05 20:17 ` [PATCH 19/24] acpi: Disable APEI error injection " David Howells
2017-04-05 20:17   ` David Howells
2017-04-05 20:17 ` [PATCH 20/24] bpf: Restrict kernel image access functions when " David Howells
2017-04-05 20:17   ` David Howells
2017-04-06 12:29   ` Alexei Starovoitov
2017-04-06 12:29     ` Alexei Starovoitov
2017-04-06 12:40     ` Ard Biesheuvel
2017-04-06 12:40       ` Ard Biesheuvel
2017-04-12 14:57   ` joeyli
2017-04-12 14:57     ` joeyli
2017-04-12 14:57     ` joeyli
2017-04-13  8:46   ` David Howells
2017-04-13  8:46     ` David Howells
2017-04-05 20:17 ` [PATCH 21/24] scsi: Lock down the eata driver David Howells
2017-04-05 20:17   ` David Howells
2017-04-05 20:17 ` [PATCH 22/24] Prohibit PCMCIA CIS storage when the kernel is locked down David Howells
2017-04-05 20:17   ` David Howells
2017-04-05 20:17   ` David Howells
2017-04-05 20:17 ` [PATCH 23/24] Lock down TIOCSSERIAL David Howells
2017-04-05 20:17   ` David Howells
2017-04-05 20:17   ` David Howells
2017-04-05 20:18 ` [PATCH 24/24] Lock down module params that specify hardware parameters (eg. ioport) David Howells
2017-04-05 20:18   ` David Howells
2017-04-05 20:18   ` David Howells
2017-04-07 15:59 ` [PATCH 00/24] Kernel lockdown Austin S. Hemmelgarn
2017-04-07 15:59   ` Austin S. Hemmelgarn
2017-04-07 16:29   ` Justin Forbes
2017-04-07 16:29     ` Justin Forbes
2017-04-07 16:29     ` Justin Forbes
2017-04-10 23:15 ` Why kernel lockdown? David Howells
2017-04-10 23:15   ` David Howells
  -- strict thread matches above, loose matches on Subject: below --
2017-04-05 17:09 [PATCH 00/24] Kernel lockdown David Howells
2017-04-05 17:12 ` [PATCH 15/24] asus-wmi: Restrict debugfs interface when the kernel is locked down David Howells
2017-04-05 17:12   ` David Howells

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