CONFIG_COMPAT_BRK: Disable heap randomization

General informations

The Linux kernel configuration item CONFIG_COMPAT_BRK has multiple definitions:

Disable heap randomization found in mm/Kconfig

The configuration item CONFIG_COMPAT_BRK:

• prompt: Disable heap randomization
• type: bool
• depends on: (none)
• defined in mm/Kconfig
• found in Linux kernels: 5.19, 6.0–6.8, 6.9-rc+HEAD

Help text

Randomizing heap placement makes heap exploits harder, but it also breaks ancient binaries (including anything libc5 based). This option changes the bootup default to heap randomization disabled, and can be overridden at runtime by setting /proc/sys/kernel/randomize_va_space to 2.

On non-ancient distros (post-2000 ones) N is usually a safe choice.

Disable heap randomization found in init/Kconfig

The configuration item CONFIG_COMPAT_BRK:

• prompt: Disable heap randomization
• type: bool
• depends on: (none)
• defined in init/Kconfig
• found in Linux kernels: 2.6.25–2.6.39, 3.0–3.19, 4.0–4.20, 5.0–5.18, 5.18+HEAD

Help text

Randomizing heap placement makes heap exploits harder, but it also breaks ancient binaries (including anything libc5 based). This option changes the bootup default to heap randomization disabled, and can be overridden at runtime by setting /proc/sys/kernel/randomize_va_space to 2.

On non-ancient distros (post-2000 ones) N is usually a safe choice.

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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