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1 | menu "Kernel hacking" |
2 | |
3 | source "lib/Kconfig.debug" |
4 | |
5 | config DEBUG_RODATA |
6 | bool "Write protect kernel read-only data structures" |
7 | depends on DEBUG_KERNEL |
8 | help |
9 | Mark the kernel read-only data as write-protected in the pagetables, |
10 | in order to catch accidental (and incorrect) writes to such const |
11 | data. This option may have a slight performance impact because a |
12 | portion of the kernel code won't be covered by a TLB anymore. |
13 | If in doubt, say "N". |
14 | |
15 | config DEBUG_STRICT_USER_COPY_CHECKS |
16 | bool "Strict copy size checks" |
17 | depends on DEBUG_KERNEL && !TRACE_BRANCH_PROFILING |
18 | ---help--- |
19 | Enabling this option turns a certain set of sanity checks for user |
20 | copy operations into compile time failures. |
21 | |
22 | The copy_from_user() etc checks are there to help test if there |
23 | are sufficient security checks on the length argument of |
24 | the copy operation, by having gcc prove that the argument is |
25 | within bounds. |
26 | |
27 | If unsure, or if you run an older (pre 4.4) gcc, say N. |
28 | |
29 | endmenu |
30 |
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