CONFIG_RODATA_FULL_DEFAULT_ENABLED: Apply r/o permissions of VM areas also to their linear aliases

General informations

The Linux kernel configuration item CONFIG_RODATA_FULL_DEFAULT_ENABLED:

• prompt: Apply r/o permissions of VM areas also to their linear aliases
• type: bool
• depends on: (none)
• defined in arch/arm64/Kconfig
• found in Linux kernels: 5.0–5.19, 6.0–6.8, 6.9-rc+HEAD

Help text

Apply read-only attributes of VM areas to the linear alias of the backing pages as well. This prevents code or read-only data from being modified (inadvertently or intentionally) via another mapping of the same memory page. This additional enhancement can be turned off at runtime by passing rodata=[off|on] (and turned on with rodata=full if this option is set to 'n')

This requires the linear region to be mapped down to pages, which may adversely affect performance in some cases.

Hardware

LKDDb

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• (none)

Sources

This page is automaticly generated with free (libre, open) software lkddb(see lkddb-sources).

The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)

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