Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > linux.kernel > #1617212 > unrolled thread
| Started by | David Howells <dhowells@redhat.com> |
|---|---|
| First post | 2017-04-05 19:20 +0200 |
| Last post | 2017-04-07 18:40 +0200 |
| Articles | 2 — 2 participants |
Back to article view | Back to linux.kernel
[PATCH 00/24] Kernel lockdown David Howells <dhowells@redhat.com> - 2017-04-05 19:20 +0200
Re: [PATCH 00/24] Kernel lockdown Justin Forbes <jmforbes@linuxtx.org> - 2017-04-07 18:40 +0200
| From | David Howells <dhowells@redhat.com> |
|---|---|
| Date | 2017-04-05 19:20 +0200 |
| Subject | [PATCH 00/24] Kernel lockdown |
| Message-ID | <tsWBr-5sA-11@gated-at.bofh.it> |
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
---
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 (2):
kexec_file: Disable at runtime if securelevel has been set
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
[toc] | [next] | [standalone]
| From | Justin Forbes <jmforbes@linuxtx.org> |
|---|---|
| Date | 2017-04-07 18:40 +0200 |
| Message-ID | <ttF5v-1hT-19@gated-at.bofh.it> |
| In reply to | #1617212 |
On Wed, Apr 5, 2017 at 12:07 PM, David Howells <dhowells@redhat.com> wrote: > > 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 > --- > 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 (2): > kexec_file: Disable at runtime if securelevel has been set > 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 > Tested-by: Justin Forbes <jforbes@fedoraproject.org>
[toc] | [prev] | [standalone]
Back to top | Article view | linux.kernel
csiph-web