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| author |   Anthony G. Basile <blueness@gentoo.org> | 2017-04-22 12:08:04 -0400 |
|---|---|---|
| committer | Anthony G. Basile <blueness@gentoo.org> | 2017-04-22 12:08:04 -0400 |
| commit | a6383ddcf48aac166b64e6008cbceb4476975279 (patch) | |
| tree | 378807c872bdda51eaeff69ff7752e95142c8710 /4.9.24/4475_emutramp_default_on.patch | |
| parent | grsecurity-3.1-4.9.23-201704181901 (diff) | |
| download | hardened-patchset-master.tar.gz hardened-patchset-master.tar.bz2 hardened-patchset-master.zip | |
Diffstat (limited to '4.9.24/4475_emutramp_default_on.patch')
| -rw-r--r-- | 4.9.24/4475_emutramp_default_on.patch | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/4.9.24/4475_emutramp_default_on.patch b/4.9.24/4475_emutramp_default_on.patch new file mode 100644 index 0000000..feb8c7b --- /dev/null +++ b/4.9.24/4475_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 +@@ -440,7 +440,7 @@ + + 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 +@@ -463,6 +463,12 @@ + 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 |