CONFIG_KMALLOC_PARTITION_CACHES: Partitioned slab caches for normal kmalloc

General informations

The Linux kernel configuration item CONFIG_KMALLOC_PARTITION_CACHES:

• prompt: Partitioned slab caches for normal kmalloc
• type: bool
• depends on: ! CONFIG_SLUB_TINY
• defined in mm/Kconfig
• found in Linux kernels: 7.2-rc+HEAD

Help text

A hardening feature that creates multiple isolated copies of slab caches for normal kmalloc allocations. This makes it more difficult to exploit memory-safety vulnerabilities by attacking vulnerable co-located memory objects. Several modes are provided.

Currently the number of copies is set to 16, a reasonably large value that effectively diverges the memory objects allocated for different subsystems or modules into different caches, at the expense of a limited degree of memory and CPU overhead that relates to hardware and system workload.

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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