CONFIG_ARCH_MMAP_RND_COMPAT_BITS: Number of bits to use for ASLR of mmap base address for compatible applications

General informations

The Linux kernel configuration item CONFIG_ARCH_MMAP_RND_COMPAT_BITS:

• prompt: Number of bits to use for ASLR of mmap base address for compatible applications
• type: int
• depends on: ( CONFIG_EXPERT ) && ( CONFIG_ARCH_MMAP_RND_COMPAT_BITS_DEFAULT ) && ( CONFIG_HAVE_ARCH_MMAP_RND_COMPAT_BITS )
• defined in arch/Kconfig
• found in Linux kernels: 4.5–4.20, 5.0–5.19, 6.0–6.12

Help text

This value can be used to select the number of bits to use to determine the random offset to the base address of vma regions resulting from mmap allocations for compatible applications This value will be bounded by the architecture's minimum and maximum supported values.

This value can be changed after boot using the /proc/sys/vm/mmap_rnd_compat_bits tunable

Hardware

LKDDb

Raw data from LKDDb:

• (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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