[PATCH 1/4] added SECURITY_TIOCSTI_RESTRICT kernel config

[Matt Brown <matt@nmatt.com>]

adding the kernel config SECURITY_TIOCSTI_RESTRICT in order to allow
the user to restrict unprivileged command injection using TIOCSTI
tty ioctls

Signed-off-by: Matt Brown <matt@nmatt.com>
---
 security/Kconfig | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/security/Kconfig b/security/Kconfig
index 3ff1bf9..d757bcb 100644
--- a/security/Kconfig
+++ b/security/Kconfig
@@ -18,6 +18,18 @@ config SECURITY_DMESG_RESTRICT
 
 	  If you are unsure how to answer this question, answer N.
 
+config SECURITY_TIOCSTI_RESTRICT
+        bool "Restrict unprivileged use of tiocsti command injection"
+        default n
+        help
+	  This enforces restrictions on unprivileged users injecting commands
+	  into other processes in the same tty session using the TIOCSTI ioctl
+
+	  If this option is not selected, no restrictions will be enforced
+	  unless the tiocsti_restrict sysctl is explicitly set to (1).
+
+	  If you are unsure how to answer this question, answer N.
+
 config SECURITY
 	bool "Enable different security models"
 	depends on SYSFS
-- 
2.10.2