From ccae0be67362d2d4c56863cd2327e2c7c03a3c7f Mon Sep 17 00:00:00 2001
From: Siddhesh Poyarekar <siddhesh@sourceware.org>
Date: Thu, 2 Feb 2017 16:15:45 +0530
Subject: Drop GLIBC_TUNABLES in setxid processes

Drop the GLIBC_TUNABLES environment variable from the environment of
setxid processes to avoid passing it on to non-setxid children.  This
prevents potentially insecure tunables in the GLIBC_TUNABLES envvar
from crossing over into a child that may use a libc that has tunables
support.

	* sysdeps/generic/unsecvars.h: Add GLIBC_TUNABLES.
---
 ChangeLog                   | 4 ++++
 sysdeps/generic/unsecvars.h | 1 +
 2 files changed, 5 insertions(+)

diff --git a/ChangeLog b/ChangeLog
index c061140..a2f7a91 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2017-04-06  Siddhesh Poyarekar  <siddhesh@sourceware.org>
+
+	* sysdeps/generic/unsecvars.h: Add GLIBC_TUNABLES.
+
 2017-04-06  Denis Kaganovich  <mahatma@eu.by>
 	    Magnus Granberg  <zorry@gentoo.org>
 	    Mike Frysinger  <vapier@gentoo.org>
diff --git a/sysdeps/generic/unsecvars.h b/sysdeps/generic/unsecvars.h
index d5b8119..3e56538 100644
--- a/sysdeps/generic/unsecvars.h
+++ b/sysdeps/generic/unsecvars.h
@@ -4,6 +4,7 @@
 #define UNSECURE_ENVVARS \
   "GCONV_PATH\0"							      \
   "GETCONF_DIR\0"							      \
+  "GLIBC_TUNABLES\0"							      \
   "HOSTALIASES\0"							      \
   "LD_AUDIT\0"								      \
   "LD_DEBUG\0"								      \
-- 
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