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Reword description of cfi=kcfi kerenel parameter

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Raja Grewal 2024-07-24 23:33:36 +10:00
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1 changed files with 6 additions and 6 deletions
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etc/default/grub.d/40_kernel_hardening.cfg
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@ -113,14 +113,14 @@ GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX debugfs=off"
#GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX quiet"
## Switch (back) to using kCFI as the default Control Flow Integrity (CFI) implementation.
## As of Linux kernel 6.2, FineIBT has been the default implementation.
## The Intel-developed IBT (Indirect Branch Tracking) is only used if there support by the CPU.
## As of Linux kernel 6.2, FineIBT has been selected to be the default implementation.
## The Intel-developed IBT (Indirect Branch Tracking) is only used if there is support by the CPU.
## kCFI is software-only while FineIBT is a hybrid software/hardware implementation.
## FineIBT may result in performance benefits as it only performs checking at destinations.
## FineIBT is weaker against attacks that can write arbitrary executable in memory.
## FineIBT may result in some performance benefits as it only performs checking at destinations.
## FineIBT is considered weaker against attacks that can write arbitrary executable in memory.
## Upstream hardening has given users the ability to disable FineIBT based on requests.
## Choice of CFI implementation is dependent on user threat model as there are pros/cons to both.
## Do not modify this parameter if unsure of implications.
## Choice of CFI implementation is highly dependent on user threat model as there are pros/cons to both.
## Do not modify from default if unsure of implications.
##
## https://lore.kernel.org/all/20221027092842.699804264@infradead.org/
## https://lore.kernel.org/lkml/202210010918.4918F847C4@keescook/T/#u