Re: [PATCH V40 23/29] bpf: Restrict bpf when kernel lockdown is in confidentiality mode

From: David Howells <dhowells@redhat.com>
Date: 2019-08-30 16:33:04
Also in: linux-security-module, lkml, netdev
Reply to: Matthew Garrett, 2019-08-20

Matthew Garrett [off-list ref] wrote:

From: David Howells <dhowells@redhat.com>

bpf_read() and bpf_read_str() could potentially be abused to (eg) allow
private keys in kernel memory to be leaked. Disable them if the kernel
has been locked down in confidentiality mode.

Suggested-by: Alexei Starovoitov <redacted>
Signed-off-by: Matthew Garrett <redacted>
Reviewed-by: Kees Cook <redacted>
cc: <redacted>
cc: Chun-Yi Lee <jlee@suse.com>
cc: Alexei Starovoitov <redacted>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: James Morris <jmorris@namei.org>

Signed-off-by: David Howells <dhowells@redhat.com>

Matthew Garrett · 2019-08-20
[PATCH V40 01/29] security: Support early LSMs · Matthew Garrett · 2019-08-20
[PATCH V40 02/29] security: Add a "locked down" LSM hook · Matthew Garrett · 2019-08-20
[PATCH V40 04/29] lockdown: Enforce module signatures if the kernel is locked down · Matthew Garrett · 2019-08-20
Re: [PATCH V40 04/29] lockdown: Enforce module signatures if the kernel is locked down · David Howells · 2019-08-30
Re: [PATCH V40 04/29] lockdown: Enforce module signatures if the kernel is locked down · Matthew Garrett · 2019-09-04
[PATCH V40 05/29] lockdown: Restrict /dev/{mem,kmem,port} when the kernel is locked down · Matthew Garrett · 2019-08-20
[PATCH V40 06/29] kexec_load: Disable at runtime if the kernel is locked down · Matthew Garrett · 2019-08-20
[PATCH V40 07/29] lockdown: Copy secure_boot flag in boot params across kexec reboot · Matthew Garrett · 2019-08-20
[PATCH V40 08/29] kexec_file: split KEXEC_VERIFY_SIG into KEXEC_SIG and KEXEC_SIG_FORCE · Matthew Garrett · 2019-08-20
Re: [PATCH V40 08/29] kexec_file: split KEXEC_VERIFY_SIG into KEXEC_SIG and KEXEC_SIG_FORCE · Philipp Rudo · 2019-08-30
[PATCH V40 09/29] kexec_file: Restrict at runtime if the kernel is locked down · Matthew Garrett · 2019-08-20
[PATCH V40 10/29] hibernate: Disable when the kernel is locked down · Matthew Garrett · 2019-08-20
Re: [PATCH V40 10/29] hibernate: Disable when the kernel is locked down · Rafael J. Wysocki · 2019-08-20
Re: [PATCH V40 10/29] hibernate: Disable when the kernel is locked down · Pavel Machek · 2019-08-25
[PATCH V40 12/29] x86: Lock down IO port access when the kernel is locked down · Matthew Garrett · 2019-08-20
Re: [PATCH V40 12/29] x86: Lock down IO port access when the kernel is locked down · Kai-Heng Feng · 2022-01-05
Re: [PATCH V40 12/29] x86: Lock down IO port access when the kernel is locked down · Matthew Garrett · 2022-01-05
Re: [PATCH V40 12/29] x86: Lock down IO port access when the kernel is locked down · Kai-Heng Feng · 2022-01-05
Re: [PATCH V40 12/29] x86: Lock down IO port access when the kernel is locked down · Matthew Garrett · 2022-01-05
Re: [PATCH V40 12/29] x86: Lock down IO port access when the kernel is locked down · Kai-Heng Feng · 2022-01-05
Re: [PATCH V40 12/29] x86: Lock down IO port access when the kernel is locked down · Matthew Garrett · 2022-01-05
[PATCH V40 11/29] PCI: Lock down BAR access when the kernel is locked down · Matthew Garrett · 2019-08-20
Re: [PATCH V40 11/29] PCI: Lock down BAR access when the kernel is locked down · Bjorn Helgaas · 2019-08-20
Re: [PATCH V40 11/29] PCI: Lock down BAR access when the kernel is locked down · Matthew Garrett · 2019-08-20
[PATCH V40 13/29] x86/msr: Restrict MSR access when the kernel is locked down · Matthew Garrett · 2019-08-20
[PATCH V40 16/29] acpi: Disable ACPI table override if the kernel is locked down · Matthew Garrett · 2019-08-20
Re: [PATCH V40 16/29] acpi: Disable ACPI table override if the kernel is locked down · Rafael J. Wysocki · 2019-08-20
[PATCH V40 17/29] lockdown: Prohibit PCMCIA CIS storage when the kernel is locked down · Matthew Garrett · 2019-08-20
[PATCH V40 18/29] lockdown: Lock down TIOCSSERIAL · Matthew Garrett · 2019-08-20
[PATCH V40 19/29] lockdown: Lock down module params that specify hardware parameters (eg. ioport) · Matthew Garrett · 2019-08-20
Re: [PATCH V40 19/29] lockdown: Lock down module params that specify hardware parameters (eg. ioport) · Jessica Yu · 2019-08-20
[PATCH V40 21/29] lockdown: Lock down /proc/kcore · Matthew Garrett · 2019-08-20
[PATCH V40 22/29] lockdown: Lock down tracing and perf kprobes when in confidentiality mode · Matthew Garrett · 2019-08-20
[PATCH V40 24/29] lockdown: Lock down perf when in confidentiality mode · Matthew Garrett · 2019-08-20
[PATCH V40 25/29] kexec: Allow kexec_file() with appropriate IMA policy when locked down · Matthew Garrett · 2019-08-20
[PATCH V40 26/29] debugfs: Restrict debugfs when the kernel is locked down · Matthew Garrett · 2019-08-20
[PATCH V40 28/29] efi: Restrict efivar_ssdt_load when the kernel is locked down · Matthew Garrett · 2019-08-20
[PATCH V40 29/29] lockdown: Print current->comm in restriction messages · Matthew Garrett · 2019-08-20
[PATCH V40 27/29] tracefs: Restrict tracefs when the kernel is locked down · Matthew Garrett · 2019-08-20
[PATCH V40 23/29] bpf: Restrict bpf when kernel lockdown is in confidentiality mode · Matthew Garrett · 2019-08-20
Re: [PATCH V40 23/29] bpf: Restrict bpf when kernel lockdown is in confidentiality mode · David Howells · 2019-08-30
[PATCH V40 20/29] x86/mmiotrace: Lock down the testmmiotrace module · Matthew Garrett · 2019-08-20
[PATCH V40 15/29] acpi: Ignore acpi_rsdp kernel param when the kernel has been locked down · Matthew Garrett · 2019-08-20
Re: [PATCH V40 15/29] acpi: Ignore acpi_rsdp kernel param when the kernel has been locked down · Rafael J. Wysocki · 2019-08-20
[PATCH V40 14/29] ACPI: Limit access to custom_method when the kernel is locked down · Matthew Garrett · 2019-08-20
Re: [PATCH V40 14/29] ACPI: Limit access to custom_method when the kernel is locked down · Rafael J. Wysocki · 2019-08-20
[PATCH V40 03/29] security: Add a static lockdown policy LSM · Matthew Garrett · 2019-08-20
Re: [PATCH V40 03/29] security: Add a static lockdown policy LSM · David Howells · 2019-08-30
Re: [PATCH V40 03/29] security: Add a static lockdown policy LSM · Matthew Garrett · 2019-09-04
Re: [PATCH V40 03/29] security: Add a static lockdown policy LSM · Matthew Garrett · 2019-09-10
James Morris · 2019-08-20
View all 52 messages

`h`	back out one level
`j`	next message in thread / next series-diff position
`k`	previous message in thread / previous series-diff position
`l`	drill in
`Esc`	close help / fold thread tree
`?`	toggle this help