CONFIG_SLAB_FREELIST_HARDENED: Harden slab freelist metadata

General informations

The Linux kernel configuration item CONFIG_SLAB_FREELIST_HARDENED has multiple definitions:

Harden slab freelist metadata found in mm/Kconfig

The configuration item CONFIG_SLAB_FREELIST_HARDENED:

• prompt: Harden slab freelist metadata
• type: bool
• depends on: ! CONFIG_SLUB_TINY
• defined in mm/Kconfig
• found in Linux kernels: 5.19, 6.0–6.8, 6.9-rc+HEAD

Help text

Many kernel heap attacks try to target slab cache metadata and other infrastructure. This options makes minor performance sacrifices to harden the kernel slab allocator against common freelist exploit methods.

Harden slab freelist metadata found in init/Kconfig

The configuration item CONFIG_SLAB_FREELIST_HARDENED:

• prompt: Harden slab freelist metadata
• type: bool
• depends on: CONFIG_SLAB || CONFIG_SLUB
• defined in init/Kconfig
• found in Linux kernels: 4.14–4.20, 5.0–5.18, 5.18+HEAD

Help text

Many kernel heap attacks try to target slab cache metadata and other infrastructure. This options makes minor performance sacrifices to harden the kernel slab allocator against common freelist exploit methods. Some slab implementations have more sanity-checking than others. This option is most effective with SLUB.

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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