CONFIG_VMAP_STACK: Use a virtually-mapped stack

General informations

The Linux kernel configuration item CONFIG_VMAP_STACK:

• prompt: Use a virtually-mapped stack
• type: bool
• depends on: ( CONFIG_HAVE_ARCH_VMAP_STACK ) && (! CONFIG_KASAN || CONFIG_KASAN_HW_TAGS || CONFIG_KASAN_VMALLOC )
• defined in arch/Kconfig
• found in Linux kernels: 4.9–4.20, 5.0–5.19, 6.0–6.12

Help text

Enable this if you want the use virtually-mapped kernel stacks with guard pages. This causes kernel stack overflows to be caught immediately rather than causing difficult-to-diagnose corruption.

To use this with software KASAN modes, the architecture must support backing virtual mappings with real shadow memory, and KASAN_VMALLOC must be enabled.

Hardware

LKDDb

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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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