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CONFIG_DEBUG_STACKOVERFLOW: Check for stack overflows

General informations

The Linux kernel configuration item CONFIG_DEBUG_STACKOVERFLOW has multiple definitions:

Check for kernel stack overflow found in arch/openrisc/Kconfig

The configuration item CONFIG_DEBUG_STACKOVERFLOW:

Help text

Make extra checks for space available on stack in some critical functions. This will cause kernel to run a bit slower, but will catch most of kernel stack overruns and exit gracefully.

Say Y if you are unsure.

Check for stack overflows found in arch/arc/Kconfig.debug

The configuration item CONFIG_DEBUG_STACKOVERFLOW:

Help text

This option will cause messages to be printed if free stack space drops below a certain limit.

Check for stack overflows found in arch/blackfin/Kconfig.debug

The configuration item CONFIG_DEBUG_STACKOVERFLOW:

Help text

This option will cause messages to be printed if free stack space drops below a certain limit.

Check for stack overflows found in arch/frv/Kconfig.debug

The configuration item CONFIG_DEBUG_STACKOVERFLOW:

Help text

(none)

Check for stack overflows found in arch/frv/Kconfig

The configuration item CONFIG_DEBUG_STACKOVERFLOW:

Help text

(none)

Check for stack overflows found in arch/i386/Kconfig.debug

The configuration item CONFIG_DEBUG_STACKOVERFLOW:

Help text

This option will cause messages to be printed if free stack space drops below a certain limit.

Check for stack overflows found in arch/i386/Kconfig

The configuration item CONFIG_DEBUG_STACKOVERFLOW:

Help text

(none)

Check for stack overflows found in arch/m32r/Kconfig.debug

The configuration item CONFIG_DEBUG_STACKOVERFLOW:

Help text

This option will cause messages to be printed if free stack space drops below a certain limit.

Check for stack overflows found in arch/m32r/Kconfig

The configuration item CONFIG_DEBUG_STACKOVERFLOW:

Help text

(none)

Check for stack overflows found in arch/metag/Kconfig.debug

The configuration item CONFIG_DEBUG_STACKOVERFLOW:

Help text

This option will cause messages to be printed if free stack space drops below a certain limit.

Check for stack overflows found in arch/mips/Kconfig.debug

The configuration item CONFIG_DEBUG_STACKOVERFLOW:

Help text

This option will cause messages to be printed if free stack space drops below a certain limit(2GB on MIPS). The debugging option provides another way to check stack overflow happened on kernel mode stack usually caused by nested interruption.

Check for stack overflows found in arch/mn10300/Kconfig.debug

The configuration item CONFIG_DEBUG_STACKOVERFLOW:

Help text

(none)

Check for stack overflows found in arch/parisc/Kconfig.debug

The configuration item CONFIG_DEBUG_STACKOVERFLOW:

Help text

Say Y here if you want to check the overflows of kernel, IRQ and exception stacks. This option will cause messages of the stacks in detail when free stack space drops below a certain limit. If in doubt, say "N".

Check for stack overflows found in arch/powerpc/Kconfig.debug

The configuration item CONFIG_DEBUG_STACKOVERFLOW:

Help text

This option will cause messages to be printed if free stack space drops below a certain limit.

Check for stack overflows found in arch/ppc64/Kconfig.debug

The configuration item CONFIG_DEBUG_STACKOVERFLOW:

Help text

This option will cause messages to be printed if free stack space drops below a certain limit.

Check for stack overflows found in arch/ppc64/Kconfig

The configuration item CONFIG_DEBUG_STACKOVERFLOW:

Help text

(none)

Check for stack overflows found in arch/sh/Kconfig.debug

The configuration item CONFIG_DEBUG_STACKOVERFLOW:

Help text

This option will cause messages to be printed if free stack space drops below a certain limit.

Check for stack overflows found in arch/tile/Kconfig.debug

The configuration item CONFIG_DEBUG_STACKOVERFLOW:

Help text

This option will cause messages to be printed if free stack space drops below a certain limit.

Check for stack overflows found in arch/x86/Kconfig.debug

The configuration item CONFIG_DEBUG_STACKOVERFLOW:

Help text

Say Y here if you want to check the overflows of kernel, IRQ and exception stacks. This option will cause messages of the stacks in detail when free stack space drops below a certain limit. If in doubt, say "N".

Check for stack overflows found in arch/x86_64/Kconfig.debug

The configuration item CONFIG_DEBUG_STACKOVERFLOW:

Help text

This option will cause messages to be printed if free stack space drops below a certain limit.

Check for stack overflows found in lib/Kconfig.debug

The configuration item CONFIG_DEBUG_STACKOVERFLOW:

Help text

Say Y here if you want to check for overflows of kernel, IRQ and exception stacks (if your archicture uses them). This option will show detailed messages if free stack space drops below a certain limit.

These kinds of bugs usually occur when call-chains in the kernel get too deep, especially when interrupts are involved.

Use this in cases where you see apparently random memory corruption, especially if it appears in 'struct thread_info'

If in doubt, say "N".

Hardware

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