mirror of https://git.envs.net/envs/ops.git
15 lines
724 B
Plaintext
15 lines
724 B
Plaintext
# These settings are specific to hardening the kernel itself from attack
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# from userspace, rather than protecting userspace from other malicious
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# userspace things.
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#
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# When an attacker is trying to exploit the local kernel, it is often
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# helpful to be able to examine where in memory the kernel, modules,
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# and data structures live. As such, kernel addresses should be treated
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# as sensitive information.
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#
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# Many files and interfaces contain these addresses (e.g. /proc/kallsyms,
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# /proc/modules, etc), and this setting can censor the addresses. A value
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# of "0" allows all users to see the kernel addresses. A value of "1"
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# limits visibility to the root user, and "2" blocks even the root user.
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kernel.kptr_restrict = 1
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