| menu "Kernel hacking" |
| |
| source "lib/Kconfig.debug" |
| |
| config DEBUG_RODATA |
| bool "Write protect kernel read-only data structures" |
| depends on DEBUG_KERNEL |
| help |
| Mark the kernel read-only data as write-protected in the pagetables, |
| in order to catch accidental (and incorrect) writes to such const |
| data. This option may have a slight performance impact because a |
| portion of the kernel code won't be covered by a TLB anymore. |
| If in doubt, say "N". |
| |
| config DEBUG_STRICT_USER_COPY_CHECKS |
| bool "Strict copy size checks" |
| depends on DEBUG_KERNEL && !TRACE_BRANCH_PROFILING |
| ---help--- |
| Enabling this option turns a certain set of sanity checks for user |
| copy operations into compile time failures. |
| |
| The copy_from_user() etc checks are there to help test if there |
| are sufficient security checks on the length argument of |
| the copy operation, by having gcc prove that the argument is |
| within bounds. |
| |
| If unsure, or if you run an older (pre 4.4) gcc, say N. |
| |
| endmenu |
