mirror of
https://github.com/Kicksecure/security-misc.git
synced 2024-10-01 08:25:45 -04:00
83 lines
3.8 KiB
INI
83 lines
3.8 KiB
INI
## Copyright (C) 2019 - 2023 ENCRYPTED SUPPORT LP <adrelanos@whonix.org>
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## See the file COPYING for copying conditions.
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## Enables all known mitigations for CPU vulnerabilities.
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##
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## https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/index.html
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## https://www.kernel.org/doc/html/latest/admin-guide/kernel-parameters.html
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## https://forums.whonix.org/t/should-all-kernel-patches-for-cpu-bugs-be-unconditionally-enabled-vs-performance-vs-applicability/7647
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## Enable known mitigations for CPU vulnerabilities and disable SMT.
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GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX mitigations=auto,nosmt"
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## Enable mitigations for Spectre variant 2 (indirect branch speculation).
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##
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## https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/spectre.html
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GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX spectre_v2=on"
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## Disable Speculative Store Bypass.
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GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX spec_store_bypass_disable=on"
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## Enable mitigations for the L1TF vulnerability through disabling SMT
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## and L1D flush runtime control.
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##
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## https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/l1tf.html
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GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX l1tf=full,force"
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## Enable mitigations for the MDS vulnerability through clearing buffer cache
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## and disabling SMT.
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##
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## https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/mds.html
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GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX mds=full,nosmt"
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## Patches the TAA vulnerability by disabling TSX and enables mitigations using
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## TSX Async Abort along with disabling SMT.
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##
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## https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/tsx_async_abort.html
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GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX tsx=off tsx_async_abort=full,nosmt"
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## Mark all huge pages in the EPT as non-executable to mitigate iTLB multihit.
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##
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## https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/multihit.html
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GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX kvm.nx_huge_pages=force"
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## Enables mitigations for SRBDS to prevent MDS attacks on RDRAND and RDSEED instructions.
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## Only mitigated through microcode updates from Intel.
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##
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## https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/special-register-buffer-data-sampling.html
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## https://access.redhat.com/solutions/5142691
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## Force disable SMT as it has caused numerous CPU vulnerabilities.
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## The only full mitigation of cross-HT attacks is to disable SMT.
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##
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## https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/core-scheduling.html
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## https://forums.whonix.org/t/should-all-kernel-patches-for-cpu-bugs-be-unconditionally-enabled-vs-performance-vs-applicability/7647/17
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GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX nosmt=force"
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## Enables the prctl interface to prevent leaks from L1D on context switches.
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##
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## https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/l1d_flush.html
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GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX l1d_flush=on"
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## Mitigates numerous MMIO Stale Data vulnerabilities and disables SMT.
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##
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## https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/processor_mmio_stale_data.html
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GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX mmio_stale_data=full,nosmt"
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## Enable mitigations for RETBleed (Arbitrary Speculative Code Execution with
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## Return Instructions) vulnerability and disable SMT.
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##
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GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX retbleed=auto,nosmt"
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## Control RAS overflow mitigation on AMD Zen CPUs.
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## The current default kernel parameter is 'spec_rstack_overflow=safe-ret'
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## This default will used until provided sufficient evidence to modify.
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##
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## https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/srso.html
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## Enables mitigation of Branch History Injection vulnerabilities on Intel CPUs.
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##
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## https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2bb69f5fc72183e1c62547d900f560d0e9334925
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## TODO: update the above link with better alternative when possible
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GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX spectre_bhi=on"
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