diff options
| author | Marco Elver <elver@google.com> | 2023-08-11 17:18:41 +0200 |
|---|---|---|
| committer | Kees Cook <keescook@chromium.org> | 2023-08-15 14:57:25 -0700 |
| commit | aa9f10d57056cea51d41283d3785bccbbb9f459e (patch) | |
| tree | 712f14060857e79e26767cf46bd5e767592d422b /lib/Kconfig.debug | |
| parent | aebc7b0d8d91bbc69e976909963046bc48bca4fd (diff) | |
| download | lwn-aa9f10d57056cea51d41283d3785bccbbb9f459e.tar.gz lwn-aa9f10d57056cea51d41283d3785bccbbb9f459e.zip | |
hardening: Move BUG_ON_DATA_CORRUPTION to hardening options
BUG_ON_DATA_CORRUPTION is turning detected corruptions of list data
structures from WARNings into BUGs. This can be useful to stop further
corruptions or even exploitation attempts.
However, the option has less to do with debugging than with hardening.
With the introduction of LIST_HARDENED, it makes more sense to move it
to the hardening options, where it selects LIST_HARDENED instead.
Without this change, combining BUG_ON_DATA_CORRUPTION with LIST_HARDENED
alone wouldn't be possible, because DEBUG_LIST would always be selected
by BUG_ON_DATA_CORRUPTION.
Signed-off-by: Marco Elver <elver@google.com>
Link: https://lore.kernel.org/r/20230811151847.1594958-4-elver@google.com
Signed-off-by: Kees Cook <keescook@chromium.org>
Diffstat (limited to 'lib/Kconfig.debug')
| -rw-r--r-- | lib/Kconfig.debug | 12 |
1 files changed, 1 insertions, 11 deletions
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index c38745ad46eb..c7348d1fabe5 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -1673,7 +1673,7 @@ menu "Debug kernel data structures" config DEBUG_LIST bool "Debug linked list manipulation" - depends on DEBUG_KERNEL || BUG_ON_DATA_CORRUPTION + depends on DEBUG_KERNEL select LIST_HARDENED help Enable this to turn on extended checks in the linked-list walking @@ -1715,16 +1715,6 @@ config DEBUG_NOTIFIERS This is a relatively cheap check but if you care about maximum performance, say N. -config BUG_ON_DATA_CORRUPTION - bool "Trigger a BUG when data corruption is detected" - select DEBUG_LIST - help - Select this option if the kernel should BUG when it encounters - data corruption in kernel memory structures when they get checked - for validity. - - If unsure, say N. - config DEBUG_MAPLE_TREE bool "Debug maple trees" depends on DEBUG_KERNEL |