summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
Diffstat (limited to '4.8.10/4475_emutramp_default_on.patch')
-rw-r--r--4.8.10/4475_emutramp_default_on.patch34
1 files changed, 34 insertions, 0 deletions
diff --git a/4.8.10/4475_emutramp_default_on.patch b/4.8.10/4475_emutramp_default_on.patch
new file mode 100644
index 0000000..7b468ee
--- /dev/null
+++ b/4.8.10/4475_emutramp_default_on.patch
@@ -0,0 +1,34 @@
+From: Anthony G. Basile <blueness@gentoo.org>
+
+PAX_EMUTRAMP is needed for libffi to avoid RWX mmap-ings using PaX emulation of trampolines.
+We default PAX_EMUTRAMP='y' since almost all hardened users will want this.
+
+See bug:
+ http://bugs.gentoo.org/show_bug.cgi?id=329499
+ http://bugs.gentoo.org/show_bug.cgi?id=457194
+
+diff -Naur linux-3.9.2-hardened.orig/security/Kconfig linux-3.9.2-hardened/security/Kconfig
+--- linux-3.9.2-hardened.orig/security/Kconfig 2013-05-18 08:53:41.000000000 -0400
++++ linux-3.9.2-hardened/security/Kconfig 2013-05-18 09:17:57.000000000 -0400
+@@ -434,7 +434,7 @@
+
+ config PAX_EMUTRAMP
+ bool "Emulate trampolines"
+- default y if PARISC || GRKERNSEC_CONFIG_AUTO
++ default y
+ depends on (PAX_PAGEEXEC || PAX_SEGMEXEC) && (PARISC || X86)
+ help
+ There are some programs and libraries that for one reason or
+@@ -457,6 +457,12 @@
+ utilities to disable CONFIG_PAX_PAGEEXEC and CONFIG_PAX_SEGMEXEC
+ for the affected files.
+
++ NOTE: Hardened Gentoo users needs this option enabled for python
++ to work properly. Without it, all python apps, including portage,
++ may fail. By default, python has CONFIG_PAX_EMUTRAMP enabled by
++ the ebuild when USE=pax_kernel is set, otherise CONFIG_PAX_PAGEEXEC
++ is enabled as a fallback.
++
+ NOTE: enabling this feature *may* open up a loophole in the
+ protection provided by non-executable pages that an attacker
+ could abuse. Therefore the best solution is to not have any