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toolchain: add fortify-headers, enable FORTIFY_SOURCE by default

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Signed-off-by: Steven Barth <steven@midlink.org>

SVN-Revision: 46117
This commit is contained in:
Steven Barth 2015-06-23 14:38:03 +00:00
parent 2086f7284c
commit 2738526a16
5 changed files with 57 additions and 2 deletions
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1
config/Config-build.in
View file

@ -251,6 +251,7 @@ menu "Global build settings"
choice
prompt "Enable buffer-overflows detection (FORTIFY_SOURCE)"
default PKG_FORTIFY_SOURCE_1
help
Enable the _FORTIFY_SOURCE macro which introduces additional
checks to detect buffer-overflows in the following standard library

2
rules.mk
View file

@ -144,7 +144,7 @@ ifndef DUMP
export GCC_HONOUR_COPTS:=0
TARGET_CROSS:=$(if $(TARGET_CROSS),$(TARGET_CROSS),$(OPTIMIZE_FOR_CPU)-openwrt-linux$(if $(TARGET_SUFFIX),-$(TARGET_SUFFIX))-)
TARGET_CFLAGS+= -fhonour-copts $(if $(CONFIG_GCC_VERSION_4_4)$(CONFIG_GCC_VERSION_4_5),,-Wno-error=unused-but-set-variable)
TARGET_CPPFLAGS+= -I$(TOOLCHAIN_DIR)/usr/include -I$(TOOLCHAIN_DIR)/include
TARGET_CPPFLAGS+= -I$(TOOLCHAIN_DIR)/usr/include -I$(TOOLCHAIN_DIR)/include/fortify -I$(TOOLCHAIN_DIR)/include
TARGET_LDFLAGS+= -L$(TOOLCHAIN_DIR)/usr/lib -L$(TOOLCHAIN_DIR)/lib
TARGET_PATH:=$(TOOLCHAIN_DIR)/bin:$(TARGET_PATH)
else

2
toolchain/Makefile
View file

@ -28,7 +28,7 @@
curdir:=toolchain
# subdirectories to descend into
$(curdir)/builddirs := $(if $(CONFIG_GDB),gdb) $(if $(CONFIG_INSIGHT),insight) $(if $(CONFIG_EXTERNAL_TOOLCHAIN),wrapper,kernel-headers binutils gcc/minimal gcc/initial gcc/final $(LIBC)/headers $(LIBC))
$(curdir)/builddirs := $(if $(CONFIG_GDB),gdb) $(if $(CONFIG_INSIGHT),insight) $(if $(CONFIG_EXTERNAL_TOOLCHAIN),wrapper,kernel-headers binutils gcc/minimal gcc/initial gcc/final $(LIBC)/headers $(LIBC) fortify-headers)
ifdef CONFIG_USE_UCLIBC
$(curdir)/builddirs += $(LIBC)/utils
endif

28
toolchain/fortify-headers/Makefile Normal file
View file

@ -0,0 +1,28 @@
#
# Copyright (C) 2015 OpenWrt.org
#
# This is free software, licensed under the GNU General Public License v2.
# See /LICENSE for more information.
#
include $(TOPDIR)/rules.mk
include $(INCLUDE_DIR)/target.mk
PKG_NAME:=fortify-headers
PKG_VERSION:=0.6
PKG_RELEASE=1
PKG_SOURCE_URL:=http://dl.2f30.org/releases
PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
PKG_MD5SUM:=d85072939ec02a40af282fe3febc6c18
include $(INCLUDE_DIR)/toolchain-build.mk
define Host/Compile
true
endef
define Host/Install
$(MAKE) -C $(HOST_BUILD_DIR) PREFIX="" DESTDIR="$(TOOLCHAIN_DIR)" install
endef
$(eval $(call HostBuild))

26
toolchain/fortify-headers/patches/100-fix-getgroups.patch Normal file
View file

@ -0,0 +1,26 @@
From 1f9848efc8a329cb9a13323cbb94b353d39802c1 Mon Sep 17 00:00:00 2001
From: Steven Barth <steven@midlink.org>
Date: Mon, 22 Jun 2015 14:36:16 +0200
Subject: [PATCH] unistd: fix signed / unsigned comparison in getgroups
Signed-off-by: Steven Barth <steven@midlink.org>
---
include/unistd.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/unistd.h b/include/unistd.h
index 45304e1..5274e22 100644
--- a/include/unistd.h
+++ b/include/unistd.h
@@ -71,7 +71,7 @@ _FORTIFY_FN(getgroups) int getgroups(int __l, gid_t *__s)
{
size_t __b = __builtin_object_size(__s, 0);
- if (__l > __b / sizeof(gid_t))
+ if (__l < 0 || (size_t)__l > __b / sizeof(gid_t))
__builtin_trap();
return __orig_getgroups(__l, __s);
}
--
2.1.4