CONFIG_HARDENED_USERCOPY_PAGESPAN: Refuse to copy allocations that span multiple pages

General informations

The Linux kernel configuration item CONFIG_HARDENED_USERCOPY_PAGESPAN:

• prompt: Refuse to copy allocations that span multiple pages
• type: bool
• depends on: ( CONFIG_HARDENED_USERCOPY ) && ( CONFIG_BROKEN )
• defined in security/Kconfig
• found in Linux kernels: 4.8–4.20, 5.0–5.18, 5.18+HEAD

Help text

When a multi-page allocation is done without __GFP_COMP, hardened usercopy will reject attempts to copy it. There are, however, several cases of this in the kernel that have not all been removed. This config is intended to be used only while trying to find such users.

Hardware

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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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