swh:1:snp:173f8deb0c56c557784b4fd217e7608ac6197844
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Tip revision: d48b97b403d23f6df0b990cee652bdf9a52337a3 authored by Linus Torvalds on 06 May 2012, 22:07:32 UTC
Linux 3.4-rc6
Linux 3.4-rc6
Tip revision: d48b97b
Kconfig.debug
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