diff options
| author | Kees Cook <keescook@chromium.org> | 2019-04-10 09:04:40 -0700 |
|---|---|---|
| committer | Kees Cook <keescook@chromium.org> | 2019-04-24 14:00:56 -0700 |
| commit | b6a6a3772d20b8552e703bb2a651760a22167cf6 (patch) | |
| tree | c36d284dea32492414d265c586971494a46bd418 /scripts | |
| parent | 9f671e58159adea641f76c56d1f0bbdcb3c524ff (diff) | |
| download | linux-b6a6a3772d20b8552e703bb2a651760a22167cf6.tar.bz2 | |
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')
| -rw-r--r-- | scripts/gcc-plugins/Kconfig | 51 |
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 |