From d2ccde1c8e90d38cee87a1b0309ad2827f3fd30d Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Mon, 11 Dec 2023 02:45:28 +0000
Subject: [PATCH] add boot partition size
---
kernel/scripts/gcc-plugins/structleak_plugin.c | 38 ++++++++++++++++++++++++++------------
1 files changed, 26 insertions(+), 12 deletions(-)
diff --git a/kernel/scripts/gcc-plugins/structleak_plugin.c b/kernel/scripts/gcc-plugins/structleak_plugin.c
index 10292f7..b9ef2e1 100644
--- a/kernel/scripts/gcc-plugins/structleak_plugin.c
+++ b/kernel/scripts/gcc-plugins/structleak_plugin.c
@@ -11,11 +11,12 @@
* otherwise leak kernel stack to userland if they aren't properly initialized
* by later code
*
- * Homepage: http://pax.grsecurity.net/
+ * Homepage: https://pax.grsecurity.net/
*
* Options:
* -fplugin-arg-structleak_plugin-disable
* -fplugin-arg-structleak_plugin-verbose
+ * -fplugin-arg-structleak_plugin-byref
* -fplugin-arg-structleak_plugin-byref-all
*
* Usage:
@@ -26,7 +27,6 @@
* $ gcc -fplugin=./structleak_plugin.so test.c -O2
*
* TODO: eliminate redundant initializers
- * increase type coverage
*/
#include "gcc-common.h"
@@ -37,13 +37,18 @@
__visible int plugin_is_GPL_compatible;
static struct plugin_info structleak_plugin_info = {
- .version = "201607271510vanilla",
+ .version = "20190125vanilla",
.help = "disable\tdo not activate plugin\n"
- "verbose\tprint all initialized variables\n",
+ "byref\tinit structs passed by reference\n"
+ "byref-all\tinit anything passed by reference\n"
+ "verbose\tprint all initialized variables\n",
};
+#define BYREF_STRUCT 1
+#define BYREF_ALL 2
+
static bool verbose;
-static bool byref_all;
+static int byref;
static tree handle_user_attribute(tree *node, tree name, tree args, int flags, bool *no_add_attrs)
{
@@ -118,6 +123,7 @@
gimple_stmt_iterator gsi;
tree initializer;
gimple init_stmt;
+ tree type;
/* this is the original entry bb before the forced split */
bb = single_succ(ENTRY_BLOCK_PTR_FOR_FN(cfun));
@@ -148,11 +154,15 @@
if (verbose)
inform(DECL_SOURCE_LOCATION(var),
"%s variable will be forcibly initialized",
- (byref_all && TREE_ADDRESSABLE(var)) ? "byref"
- : "userspace");
+ (byref && TREE_ADDRESSABLE(var)) ? "byref"
+ : "userspace");
/* build the initializer expression */
- initializer = build_constructor(TREE_TYPE(var), NULL);
+ type = TREE_TYPE(var);
+ if (AGGREGATE_TYPE_P(type))
+ initializer = build_constructor(type, NULL);
+ else
+ initializer = fold_convert(type, integer_zero_node);
/* build the initializer stmt */
init_stmt = gimple_build_assign(var, initializer);
@@ -184,13 +194,13 @@
if (!auto_var_in_fn_p(var, current_function_decl))
continue;
- /* only care about structure types */
- if (TREE_CODE(type) != RECORD_TYPE && TREE_CODE(type) != UNION_TYPE)
+ /* only care about structure types unless byref-all */
+ if (byref != BYREF_ALL && TREE_CODE(type) != RECORD_TYPE && TREE_CODE(type) != UNION_TYPE)
continue;
/* if the type is of interest, examine the variable */
if (TYPE_USERSPACE(type) ||
- (byref_all && TREE_ADDRESSABLE(var)))
+ (byref && TREE_ADDRESSABLE(var)))
initialize(var);
}
@@ -232,8 +242,12 @@
verbose = true;
continue;
}
+ if (!strcmp(argv[i].key, "byref")) {
+ byref = BYREF_STRUCT;
+ continue;
+ }
if (!strcmp(argv[i].key, "byref-all")) {
- byref_all = true;
+ byref = BYREF_ALL;
continue;
}
error(G_("unknown option '-fplugin-arg-%s-%s'"), plugin_name, argv[i].key);
--
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