ruby: Security fix for CVE-2017-9228

affects ruby < 2.4.1

(From OE-Core rev: cdfb60a7b573c034868ef27d8eb2c667f2a7ad1d)

Signed-off-by: Thiruvadi Rajaraman <trajaraman@mvista.com>
Signed-off-by: Armin Kuster <akuster@mvista.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/ruby/ruby/CVE-2017-9228.patch

@@ -0,0 +1,26 @@
+commit 3b63d12038c8d8fc278e81c942fa9bec7c704c8b
+Author: K.Kosako <kosako@sofnec.co.jp>
+Date:   Wed May 24 13:43:25 2017 +0900
+
+    fix #60 : invalid state(CCS_VALUE) in parse_char_class()
+
+Upstream-Status: Backport
+
+CVE: CVE-2017-9228
+Signed-off-by: Thiruvadi Rajaraman <trajaraman@mvista.com>
+
+Index: ruby-2.2.5/regparse.c
+===================================================================
+--- ruby-2.2.5.orig/regparse.c	2014-09-16 08:14:10.000000000 +0530
++++ ruby-2.2.5/regparse.c	2017-08-30 11:58:25.774275722 +0530
+@@ -4458,7 +4458,9 @@
+     }
+   }
+ 
+-  *state = CCS_VALUE;
++  if (*state != CCS_START)
++    *state = CCS_VALUE;
++
+   *type  = CCV_CLASS;
+   return 0;
+ }

meta/recipes-devtools/ruby/ruby_2.2.5.bb

@@ -6,6 +6,7 @@ SRC_URI[sha256sum] = "30c4b31697a4ca4ea0c8db8ad30cf45e6690a0f09687e5d483c933c03c
 SRC_URI += "file://prevent-gc.patch \
             file://CVE-2016-7798.patch \
             file://CVE-2017-9227.patch \
+            file://CVE-2017-9228.patch \
 "
 
 # it's unknown to configure script, but then passed to extconf.rb