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authorKees Cook <keescook@chromium.org>2019-04-10 09:04:40 -0700
committerKees Cook <keescook@chromium.org>2019-04-24 14:00:56 -0700
commitb6a6a3772d20b8552e703bb2a651760a22167cf6 (patch)
treec36d284dea32492414d265c586971494a46bd418 /scripts/gcc-plugins
parent9f671e58159adea641f76c56d1f0bbdcb3c524ff (diff)
downloadlinux-stericsson-b6a6a3772d20b8552e703bb2a651760a22167cf6.tar.gz
security: Move stackleak config to Kconfig.hardening
This moves the stackleak plugin options to Kconfig.hardening's memory initialization menu. Signed-off-by: Kees Cook <keescook@chromium.org> Reviewed-by: Alexander Popov <alex.popov@linux.com> Acked-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Diffstat (limited to 'scripts/gcc-plugins')
-rw-r--r--scripts/gcc-plugins/Kconfig51
1 files changed, 0 insertions, 51 deletions
diff --git a/scripts/gcc-plugins/Kconfig b/scripts/gcc-plugins/Kconfig
index 352f03878a1e..80220ed26a35 100644
--- a/scripts/gcc-plugins/Kconfig
+++ b/scripts/gcc-plugins/Kconfig
@@ -108,57 +108,6 @@ config GCC_PLUGIN_RANDSTRUCT_PERFORMANCE
in structures. This reduces the performance hit of RANDSTRUCT
at the cost of weakened randomization.
-config GCC_PLUGIN_STACKLEAK
- bool "Erase the kernel stack before returning from syscalls"
- depends on GCC_PLUGINS
- depends on HAVE_ARCH_STACKLEAK
- help
- This option makes the kernel erase the kernel stack before
- returning from system calls. That reduces the information which
- kernel stack leak bugs can reveal and blocks some uninitialized
- stack variable attacks.
-
- The tradeoff is the performance impact: on a single CPU system kernel
- compilation sees a 1% slowdown, other systems and workloads may vary
- and you are advised to test this feature on your expected workload
- before deploying it.
-
- This plugin was ported from grsecurity/PaX. More information at:
- * https://grsecurity.net/
- * https://pax.grsecurity.net/
-
-config STACKLEAK_TRACK_MIN_SIZE
- int "Minimum stack frame size of functions tracked by STACKLEAK"
- default 100
- range 0 4096
- depends on GCC_PLUGIN_STACKLEAK
- help
- The STACKLEAK gcc plugin instruments the kernel code for tracking
- the lowest border of the kernel stack (and for some other purposes).
- It inserts the stackleak_track_stack() call for the functions with
- a stack frame size greater than or equal to this parameter.
- If unsure, leave the default value 100.
-
-config STACKLEAK_METRICS
- bool "Show STACKLEAK metrics in the /proc file system"
- depends on GCC_PLUGIN_STACKLEAK
- depends on PROC_FS
- help
- If this is set, STACKLEAK metrics for every task are available in
- the /proc file system. In particular, /proc/<pid>/stack_depth
- shows the maximum kernel stack consumption for the current and
- previous syscalls. Although this information is not precise, it
- can be useful for estimating the STACKLEAK performance impact for
- your workloads.
-
-config STACKLEAK_RUNTIME_DISABLE
- bool "Allow runtime disabling of kernel stack erasing"
- depends on GCC_PLUGIN_STACKLEAK
- help
- This option provides 'stack_erasing' sysctl, which can be used in
- runtime to control kernel stack erasing for kernels built with
- CONFIG_GCC_PLUGIN_STACKLEAK.
-
config GCC_PLUGIN_ARM_SSP_PER_TASK
bool
depends on GCC_PLUGINS && ARM