From: David Howells <dhowells@redhat.com> To: linux-kernel@vger.kernel.org Cc: gnomes@lxorguk.ukuu.org.uk, linux-efi@vger.kernel.org, matthew.garrett@nebula.com, gregkh@linuxfoundation.org, dhowells@redhat.com, linux-security-module@vger.kernel.org, keyrings@vger.kernel.org Subject: [PATCH 00/24] Kernel lockdown Date: Wed, 05 Apr 2017 18:09:54 +0100 [thread overview] Message-ID: <149141219387.31282.6648284836568938717.stgit@warthog.procyon.org.uk> (raw) 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
WARNING: multiple messages have this Message-ID (diff)
From: dhowells@redhat.com (David Howells) To: linux-security-module@vger.kernel.org Subject: [PATCH 00/24] Kernel lockdown Date: Wed, 05 Apr 2017 18:09:54 +0100 [thread overview] Message-ID: <149141219387.31282.6648284836568938717.stgit@warthog.procyon.org.uk> (raw) 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 -- To unsubscribe from this list: send the line "unsubscribe linux-security-module" in the body of a message to majordomo at vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
next reply other threads:[~2017-04-05 17:10 UTC|newest] Thread overview: 76+ messages / expand[flat|nested] mbox.gz Atom feed top 2017-04-05 17:09 David Howells [this message] 2017-04-05 17:09 ` [PATCH 00/24] Kernel lockdown David Howells 2017-04-05 17:10 ` [PATCH 01/24] efi: Add EFI_SECURE_BOOT bit David Howells 2017-04-05 17:10 ` David Howells 2017-04-05 17:10 ` [PATCH 02/24] Add the ability to lock down access to the running kernel image David Howells 2017-04-05 17:10 ` David Howells 2017-04-06 8:44 ` James Morris 2017-04-06 8:44 ` James Morris 2017-04-06 8:44 ` James Morris 2017-04-06 10:43 ` David Howells 2017-04-06 10:43 ` David Howells 2017-04-06 21:55 ` James Morris 2017-04-06 21:55 ` James Morris 2017-04-06 21:55 ` James Morris 2017-04-05 17:10 ` [PATCH 03/24] efi: Lock down the kernel if booted in secure boot mode David Howells 2017-04-05 17:10 ` David Howells 2017-04-05 17:10 ` David Howells 2017-04-05 17:10 ` [PATCH 04/24] Enforce module signatures if the kernel is locked down David Howells 2017-04-05 17:10 ` David Howells 2017-04-05 17:10 ` David Howells 2017-04-05 17:10 ` [PATCH 05/24] Restrict /dev/mem and /dev/kmem when " David Howells 2017-04-05 17:10 ` David Howells 2017-04-05 17:10 ` [PATCH 06/24] Add a sysrq option to exit secure boot mode David Howells 2017-04-05 17:10 ` David Howells 2017-04-05 17:10 ` [PATCH 07/24] kexec: Disable at runtime if the kernel is locked down David Howells 2017-04-05 17:10 ` David Howells 2017-04-05 17:11 ` [PATCH 08/24] Copy secure_boot flag in boot params across kexec reboot David Howells 2017-04-05 17:11 ` David Howells 2017-04-05 17:11 ` [PATCH 09/24] kexec_file: Disable at runtime if securelevel has been set David Howells 2017-04-05 17:11 ` David Howells 2017-04-05 17:11 ` [PATCH 10/24] hibernate: Disable when the kernel is locked down David Howells 2017-04-05 17:11 ` David Howells 2017-04-05 17:11 ` David Howells 2017-04-05 17:11 ` [PATCH 11/24] uswsusp: " David Howells 2017-04-05 17:11 ` David Howells 2017-04-05 17:11 ` [PATCH 12/24] PCI: Lock down BAR access " David Howells 2017-04-05 17:11 ` David Howells 2017-04-05 17:11 ` [PATCH 13/24] x86: Lock down IO port " David Howells 2017-04-05 17:11 ` David Howells 2017-04-05 17:12 ` [PATCH 14/24] x86: Restrict MSR " David Howells 2017-04-05 17:12 ` David Howells 2017-04-05 17:34 ` Kees Cook 2017-04-05 17:34 ` Kees Cook 2017-04-05 17:34 ` Kees Cook 2017-04-05 17:12 ` [PATCH 15/24] asus-wmi: Restrict debugfs interface " David Howells 2017-04-05 17:12 ` David Howells 2017-04-05 17:12 ` [PATCH 16/24] ACPI: Limit access to custom_method " David Howells 2017-04-05 17:12 ` David Howells 2017-04-05 17:12 ` David Howells 2017-04-05 17:12 ` [PATCH 17/24] acpi: Ignore acpi_rsdp kernel param when the kernel has been " David Howells 2017-04-05 17:12 ` David Howells 2017-04-05 17:12 ` David Howells 2017-04-05 17:12 ` [PATCH 18/24] acpi: Disable ACPI table override if the kernel is " David Howells 2017-04-05 17:12 ` David Howells 2017-04-05 17:12 ` [PATCH 19/24] acpi: Disable APEI error injection " David Howells 2017-04-05 17:12 ` David Howells 2017-04-05 19:57 ` [PATCH 00/24] Kernel lockdown David Howells 2017-04-05 19:57 ` David Howells 2017-04-05 19:57 ` David Howells 2017-04-06 8:25 ` James Morris 2017-04-06 8:25 ` James Morris 2017-04-06 8:25 ` James Morris 2017-04-06 8:37 ` David Howells 2017-04-06 8:37 ` David Howells 2017-04-06 8:37 ` David Howells -- strict thread matches above, loose matches on Subject: below -- 2017-04-05 20:14 David Howells 2017-04-05 20:14 ` David Howells 2017-04-07 15:59 ` 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 2017-04-05 17:07 David Howells 2017-04-05 17:07 ` David Howells 2017-04-07 16:32 ` Justin Forbes 2017-04-07 16:32 ` Justin Forbes
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