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authorJulien Dusser <julien.dusser@free.fr>2018-01-08 23:47:06 +0100
committerHauke Mehrtens <hauke@hauke-m.de>2018-01-27 16:46:45 +0100
commitdf0bd42fdeb76c9bc51b816c3df699db123c0024 (patch)
tree1057e289580397c014b2c9c4460057e9e7ac8367 /package
parentca7e8627dbbbcae0d1bfacea51d9b564617195de (diff)
downloadupstream-df0bd42fdeb76c9bc51b816c3df699db123c0024.tar.gz
upstream-df0bd42fdeb76c9bc51b816c3df699db123c0024.tar.bz2
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build: add hardened builds with PIE (ASLR) support
Introduce a configuration option to build a "hardened" OpenWrt with ASLR PIE support. Add new option PKG_ASLR_PIE to enable Address Space Layout Randomization (ASLR) by building Position Independent Executables (PIE). This new option protects against "return-to-text" attacks. Busybox need a special care, link is done with ld, not gcc, leading to unknown flags. Set BUSYBOX_DEFAULT_PIE instead and disable PKG_ASLR_PIE. If other failing packages were found, PKG_ASLR_PIE:=0 should be added to their Makefiles. Original Work by: Yongkui Han <yonhan@cisco.com> Signed-off-by: Julien Dusser <julien.dusser@free.fr>
Diffstat (limited to 'package')
-rw-r--r--package/utils/busybox/Makefile3
1 files changed, 3 insertions, 0 deletions
diff --git a/package/utils/busybox/Makefile b/package/utils/busybox/Makefile
index 8866756aea..4f85cc9614 100644
--- a/package/utils/busybox/Makefile
+++ b/package/utils/busybox/Makefile
@@ -22,6 +22,9 @@ PKG_BUILD_PARALLEL:=1
PKG_CHECK_FORMAT_SECURITY:=0
PKG_INSTALL:=1
+#Busybox use it's own PIE config flag and LDFLAGS are used with ld, not gcc.
+PKG_ASLR_PIE:=0
+
PKG_LICENSE:=GPL-2.0
PKG_LICENSE_FILES:=LICENSE archival/libarchive/bz/LICENSE
PKG_CPE_ID:=cpe:/a:busybox:busybox