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Create a tool that changes kconfig options according to the recommendations #67

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a13xp0p0v opened this issue Jul 4, 2022 · 3 comments
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Create a tool that changes kconfig options according to the recommendations #67

a13xp0p0v opened this issue Jul 4, 2022 · 3 comments
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new_feature A new feature of the tool

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@a13xp0p0v
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It should use the JSON output of kconfig-hardened-check.
@a13xp0p0v a13xp0p0v added the new_feature A new feature of the tool label Jul 4, 2022
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See https://pypi.org/project/kconfiglib/

@a13xp0p0v a13xp0p0v mentioned this issue Jul 22, 2022
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@a13xp0p0v a13xp0p0v changed the title Create a tool that changes kconfig options according the recommendations Create a tool that changes kconfig options according to the recommendations Jul 22, 2022
@a13xp0p0v a13xp0p0v mentioned this issue Dec 8, 2022
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@a13xp0p0v
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That tool would also help to filter out the kconfig options that can't be enabled for the given kernel version.

a13xp0p0v added a commit that referenced this issue Jun 12, 2023
@a13xp0p0v
Add a new feature --generate
c6db991 
With this argument the tool generates a Kconfig fragment with the security
hardening options for the selected microarchitecture.

Refers to #67.

This Kconfig fragment can be merged with the existing Linux kernel config:

$ ./bin/kconfig-hardened-check -g X86_64 > /tmp/fragment
$ cd ~/linux-src/
$ ./scripts/kconfig/merge_config.sh .config /tmp/fragment
Using .config as base
Merging /tmp/fragment
Value of CONFIG_BUG_ON_DATA_CORRUPTION is redefined by fragment /tmp/fragment:
Previous value: # CONFIG_BUG_ON_DATA_CORRUPTION is not set
New value: CONFIG_BUG_ON_DATA_CORRUPTION=y
...
a13xp0p0v added a commit that referenced this issue Jun 12, 2023
@a13xp0p0v
Update the README
eec1747 
Refers to #67.
a13xp0p0v added a commit that referenced this issue Jun 12, 2023
@a13xp0p0v
Add functional tests for --generate
d50851e 
Refers to #67.
@a13xp0p0v
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This feature is implemented as a part of the kconfig-hardened-check tool.

With the -g argument, the tool generates a Kconfig fragment with the security hardening options for the selected microarchitecture.

This Kconfig fragment can be merged with the existing Linux kernel config:

$ ./bin/kconfig-hardened-check -g X86_64 > /tmp/fragment
$ cd ~/linux-src/
$ ./scripts/kconfig/merge_config.sh .config /tmp/fragment
Using .config as base
Merging /tmp/fragment
Value of CONFIG_BUG_ON_DATA_CORRUPTION is redefined by fragment /tmp/fragment:
Previous value: # CONFIG_BUG_ON_DATA_CORRUPTION is not set
New value: CONFIG_BUG_ON_DATA_CORRUPTION=y
 ...

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