cplus-dem.c (squangle_mop_up): Zero bsize/ksize after freeing btypevec/ktypevec.

	* cplus-dem.c (squangle_mop_up): Zero bsize/ksize after freeing
	btypevec/ktypevec.
	* testsuite/demangle-expected: Add coverage tests.

From-SVN: r234645

libiberty/ChangeLog

+2016-03-31  Mikhail Maltsev  <maltsevm@gmail.com>
+	    Marcel Bohme  boehme.marcel@gmail.com
+
+	* cplus-dem.c (squangle_mop_up): Zero bsize/ksize after freeing
+	btypevec/ktypevec.
+	* testsuite/demangle-expected: Add coverage tests.
+
 2016-01-27  Iain Buclaw  <ibuclaw@gdcproject.org>
 
 	* d-demangle.c (dlang_call_convention): Handle extern Objective-C

libiberty/cplus-dem.c

@@ -1237,11 +1237,13 @@ squangle_mop_up (struct work_stuff *work)
     {
       free ((char *) work -> btypevec);
       work->btypevec = NULL;
+      work->bsize = 0;
     }
   if (work -> ktypevec != NULL)
     {
       free ((char *) work -> ktypevec);
       work->ktypevec = NULL;
+      work->ksize = 0;
     }
 }
 

libiberty/testsuite/demangle-expected

@@ -4421,3 +4421,13 @@ void baz<int>(A<sizeof (foo((int)(), (floatcomplex )00000000_00000000))>*)
 --format=gnu-v3
 _Z3fooI1FEN1XIXszdtcl1PclcvT__EEE5arrayEE4TypeEv
 X<sizeof ((P(((F)())())).array)>::Type foo<F>()
+#
+# Tests a use-after-free problem
+
+_Q.__0
+::Q.(void)
+#
+# Tests a use-after-free problem
+
+_Q10-__9cafebabe.
+cafebabe.::-(void)