CONFIG_UBSAN_ALIGNMENT: Perform checking for misaligned pointer usage

General informations

The Linux kernel configuration item CONFIG_UBSAN_ALIGNMENT has multiple definitions:

Perform checking for misaligned pointer usage found in lib/Kconfig.ubsan

The configuration item CONFIG_UBSAN_ALIGNMENT:

• prompt: Perform checking for misaligned pointer usage
• type: bool
• depends on: (! CONFIG_UBSAN_TRAP && ! CONFIG_COMPILE_TEST ) && ($( CONFIG_cc-option,-fsanitize = CONFIG_alignment ))
• defined in lib/Kconfig.ubsan
• found in Linux kernels: 5.11–5.19, 6.0–6.17, 6.18-rc+HEAD

Help text

This option enables the check of unaligned memory accesses. Enabling this option on architectures that support unaligned accesses may produce a lot of false positives.

Enable checks for pointers alignment found in lib/Kconfig.ubsan

The configuration item CONFIG_UBSAN_ALIGNMENT:

• prompt: Enable checks for pointers alignment
• type: bool
• depends on: ! CONFIG_UBSAN_TRAP
• defined in lib/Kconfig.ubsan
• found in Linux kernels: 5.7–5.10

Help text

This option enables the check of unaligned memory accesses. Enabling this option on architectures that support unaligned accesses may produce a lot of false positives.

found in lib/Kconfig.ubsan

The configuration item CONFIG_UBSAN_ALIGNMENT:

• prompt:
• type: bool
• depends on: (none)
• defined in lib/Kconfig.ubsan
• found in Linux kernels: 5.1–5.6

Help text

(none)

Enable checking of pointers alignment found in lib/Kconfig.ubsan

The configuration item CONFIG_UBSAN_ALIGNMENT:

• prompt: Enable checking of pointers alignment
• type: bool
• depends on: ( CONFIG_UBSAN ) && (! CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS )
• defined in lib/Kconfig.ubsan
• found in Linux kernels: 4.5–4.20, 5.0

Help text

This option enables detection of unaligned memory accesses. Enabling this option on architectures that support unaligned accesses may produce a lot of false positives.

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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