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>

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