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docs: fix kernel lockdown documentation #1704

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Aug 12, 2021
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docs: fix kernel lockdown documentation #1704

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2 changes: 1 addition & 1 deletion README.md
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Expand Up @@ -476,7 +476,7 @@ Here are the metrics settings:
#### Kernel settings

* `settings.kernel.lockdown`: This allows further restrictions on what the Linux kernel will allow, for example preventing the loading of unsigned modules.
May be set to "none" (the default), "integrity", or "confidentiality".
May be set to "none" (the default in older [variants](variants/), up through aws-k8s-1.19), "integrity" (the default for newer [variants](variants/)), or "confidentiality".
**Important note:** this setting cannot be lowered (toward 'none') at runtime.
You must reboot for a change to a lower level to take effect.
* `settings.kernel.sysctl`: Key/value pairs representing Linux kernel parameters.
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2 changes: 1 addition & 1 deletion SECURITY_GUIDANCE.md
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Expand Up @@ -116,7 +116,7 @@ Modifications to the running kernel could bypass or subvert these mechanisms.
Bottlerocket enables the Lockdown security module and offers settings to choose from one of three modes.

The first mode, "none", effectively disables the protection.
This is the default in older [variants](variants/) of Bottlerocket, for compatibility with existing deployments.
This is the default in older [variants](variants/) of Bottlerocket up through aws-k8s-1.19, for compatibility with existing deployments.

The second mode, "integrity", blocks most ways to overwrite the kernel's memory and modify its code.
This is the default in newer variants.
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