Merge tag 'gcc-plugins-v4.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux

Pull gcc plugins update from Kees Cook:
 "This finishes the porting work on randstruct, and introduces a new
  option to structleak, both noted below:

   - For the randstruct plugin, enable automatic randomization of
     structures that are entirely function pointers (along with a couple
     designated initializer fixes).

   - For the structleak plugin, provide an option to perform zeroing
     initialization of all otherwise uninitialized stack variables that
     are passed by reference (Ard Biesheuvel)"

* tag 'gcc-plugins-v4.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  gcc-plugins: structleak: add option to init all vars used as byref args
  randstruct: Enable function pointer struct detection
  drivers/net/wan/z85230.c: Use designated initializers
  drm/amd/powerplay: rv: Use designated initializers

1 files changed, 14 insertions, 5 deletions

diff --git a/arch/Kconfig b/arch/Kconfig
index 2520ca5..1aafb4e 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -458,6 +458,13 @@ config GCC_PLUGIN_STRUCTLEAK
 	   * https://grsecurity.net/
 	   * https://pax.grsecurity.net/
 
+config GCC_PLUGIN_STRUCTLEAK_BYREF_ALL
+	bool "Force initialize all struct type variables passed by reference"
+	depends on GCC_PLUGIN_STRUCTLEAK
+	help
+	  Zero initialize any struct type local variable that may be passed by
+	  reference without having been initialized.
+
 config GCC_PLUGIN_STRUCTLEAK_VERBOSE
 	bool "Report forcefully initialized variables"
 	depends on GCC_PLUGIN_STRUCTLEAK
@@ -473,11 +480,13 @@ config GCC_PLUGIN_RANDSTRUCT
 	depends on GCC_PLUGINS
 	select MODVERSIONS if MODULES
 	help
-	  If you say Y here, the layouts of structures explicitly
-	  marked by __randomize_layout will be randomized at
-	  compile-time.  This can introduce the requirement of an
-	  additional information exposure vulnerability for exploits
-	  targeting these structure types.
+	  If you say Y here, the layouts of structures that are entirely
+	  function pointers (and have not been manually annotated with
+	  __no_randomize_layout), or structures that have been explicitly
+	  marked with __randomize_layout, will be randomized at compile-time.
+	  This can introduce the requirement of an additional information
+	  exposure vulnerability for exploits targeting these structure
+	  types.
 
 	  Enabling this feature will introduce some performance impact,
 	  slightly increase memory usage, and prevent the use of forensic