Comments (3)
I had similar thoughts, the performance rating sounds sensible
but is probably difficult to implement because you always have
to ask yourself in which scenario you achieve a plus or not.
I would say that someone who uses the suggestions does not
use them from a performance point of view but from a security
point of view.
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Would be great have a column that gives a rank (from 1-10) maybe about how much a CONFIG_* impacts on performance.
@asarubbo, that's an interesting idea. Could you please describe it in the issue #66 as well?
However, creating such a rating would not be easy because some kernel security features have different performance penalty depending on the type of system workload (a number and type of system calls, for example).
Do you have an idea which particular kernel option makes your system run slow on compiling chromium?
First of all, I would recommend comparing performance of the default configuration and hardened configuration without mitigations=auto,nosmt
and nosmt
boot options (they may have the biggest performance penalty). I guess, in that comparison, you will not see a big difference in the chromium compilation time.
from kernel-hardening-checker.
I noticed that the option do not follow the order from menuconfig.
@asarubbo, yes, that's true. Currently, the options are sorted by the complexity of the checking rule. It's easier for maintenance.
You have multiple options to avoid exhausting navigation in menuconfig.
- Try using search in menuconfig: press '/', enter the option name, hit enter, and then choose the number (
1
,2
,3
, ...) of the option that you want to see. I like it. - Try automatic merging of the Kconfig fragment with options that you want to change. See the example in the README.
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Related Issues (20)
- CONFIG_COMPAT_VDSO has a completely different meaning for arm64 and recommending disabling it doesn't make sense there HOT 3
- CONFIG_ARCH_MMAP_RND_BITS check is wrong for arm64 HOT 3
- drop check for dependency-only CONFIG_GCC_PLUGINS due to Clang HOT 3
- add disabling CONFIG_AIO (legacy POSIX AIO) as a recommendation HOT 1
- add check for CONFIG_MAGIC_SYSRQ_DEFAULT_ENABLE=0x0 too HOT 10
- add check for UNWIND_PATCH_PAC_INTO_SCS, which reduces security compared to using both PAC + SCS HOT 4
- Minimal kernel version ? HOT 1
- New CONFIG_MODULE_SIG_SHA3_512 option in kernel 6.7 HOT 1
- Better json output HOT 4
- Add io_uring_disabled sysctl to disable/limit io_uring creation
- Reducing Kernel Symbols on File System by Disabling CONFIG_VMLINUX_MAP and CONFIG_DEBUG_KERNEL HOT 2
- Kernel Debug Metadata Access with CONFIG_DYNAMIC_DEBUG HOT 3
- Add ia32_emulation kernel cmdline parameter to disable 32-bit emulation support on 64-bit x86 CPUs HOT 1
- Add kconfig option for Intel CET shadow stack
- Add check for CONFIG_MITIGATION_RFDS HOT 1
- Linux 6.9 Renames Many CPU Mitigation CONFIGs to CONFIG_MITIGATION_... HOT 1
- The separation between desktop and server. HOT 3
- skip CONFIG_SCHED_STACK_END_CHECK requirement when CONFIG_VMAP_STACK is set HOT 2
- skip CONFIG_DEBUG_NOTIFIERS requirement when CONFIG_CFI_CLANG is set with CONFIG_CFI_PERMISSIVE disabled HOT 4
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