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https://github.com/edk2-porting/linux-next.git
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Merge branch 'for-next/gcc-plugin/structleak' into for-next/gcc-plugins
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commit
ad05e6ca7b
@ -458,6 +458,13 @@ config GCC_PLUGIN_STRUCTLEAK
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* https://grsecurity.net/
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* https://pax.grsecurity.net/
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config GCC_PLUGIN_STRUCTLEAK_BYREF_ALL
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bool "Force initialize all struct type variables passed by reference"
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depends on GCC_PLUGIN_STRUCTLEAK
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help
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Zero initialize any struct type local variable that may be passed by
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reference without having been initialized.
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config GCC_PLUGIN_STRUCTLEAK_VERBOSE
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bool "Report forcefully initialized variables"
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depends on GCC_PLUGIN_STRUCTLEAK
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@ -27,6 +27,7 @@ ifdef CONFIG_GCC_PLUGINS
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gcc-plugin-$(CONFIG_GCC_PLUGIN_STRUCTLEAK) += structleak_plugin.so
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gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_STRUCTLEAK_VERBOSE) += -fplugin-arg-structleak_plugin-verbose
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gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_STRUCTLEAK_BYREF_ALL) += -fplugin-arg-structleak_plugin-byref-all
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gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_STRUCTLEAK) += -DSTRUCTLEAK_PLUGIN
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gcc-plugin-$(CONFIG_GCC_PLUGIN_RANDSTRUCT) += randomize_layout_plugin.so
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@ -16,6 +16,7 @@
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* Options:
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* -fplugin-arg-structleak_plugin-disable
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* -fplugin-arg-structleak_plugin-verbose
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* -fplugin-arg-structleak_plugin-byref-all
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*
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* Usage:
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* $ # for 4.5/4.6/C based 4.7
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@ -42,6 +43,7 @@ static struct plugin_info structleak_plugin_info = {
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};
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static bool verbose;
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static bool byref_all;
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static tree handle_user_attribute(tree *node, tree name, tree args, int flags, bool *no_add_attrs)
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{
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@ -150,7 +152,9 @@ static void initialize(tree var)
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/* these aren't the 0days you're looking for */
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if (verbose)
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inform(DECL_SOURCE_LOCATION(var),
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"userspace variable will be forcibly initialized");
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"%s variable will be forcibly initialized",
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(byref_all && TREE_ADDRESSABLE(var)) ? "byref"
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: "userspace");
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/* build the initializer expression */
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initializer = build_constructor(TREE_TYPE(var), NULL);
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@ -190,7 +194,8 @@ static unsigned int structleak_execute(void)
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continue;
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/* if the type is of interest, examine the variable */
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if (TYPE_USERSPACE(type))
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if (TYPE_USERSPACE(type) ||
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(byref_all && TREE_ADDRESSABLE(var)))
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initialize(var);
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}
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@ -232,6 +237,10 @@ __visible int plugin_init(struct plugin_name_args *plugin_info, struct plugin_gc
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verbose = true;
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continue;
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}
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if (!strcmp(argv[i].key, "byref-all")) {
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byref_all = true;
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continue;
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}
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error(G_("unknown option '-fplugin-arg-%s-%s'"), plugin_name, argv[i].key);
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}
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