CONFIG_STACK_CANARIES:

This option enables compiler stack canaries support kernel functions.

If stack canaries are supported by the compiler, it will emit extra code that inserts a canary value into the stack frame when a function is entered and validates this value upon exit. Stack corruption (such as that caused by buffer overflow) results in a fatal error condition for the running entity. Enabling this option can result in a significant increase in footprint and an associated decrease in performance.

If stack canaries are not supported by the compiler, enabling this option has no effect.

Symbol:

STACK_CANARIES
Type:

bool
Value:

“n”
User value:

(no user value)
Visibility:

“y”
Is choice item:

false
Is defined:

true
Is from env.:

false
Is special:

false
Prompts:
  • “Compiler stack canaries”
Default values:
  • n (value: “n”)
  • Condition: (none)
Selects:

(no selects)
Reverse (select-related) dependencies:
 

(no reverse dependencies)
Additional dependencies from enclosing menus and ifs:
 

(no additional dependencies)
Locations:
  • ../kernel/Kconfig:517