* Makefile.in (VERSION): Bump to 4.5.7.

* cplus-dem.c (demangle_args):  Validate index for previously
	seen type to guard against bogus values from malformed manglings.
	* valops.c (value_struct_elt_for_reference):  Guard against
	blindly using NULL return value from lookup_symbol.

gdb/ChangeLog

@@ -1,3 +1,11 @@
+Sun Jul  5 09:43:28 1992  Fred Fish  (fnf@cygnus.com)
+
+	* Makefile.in (VERSION):  Bump to 4.5.7.
+	* cplus-dem.c (demangle_args):  Validate index for previously
+	seen type to guard against bogus values from malformed manglings.
+	* valops.c (value_struct_elt_for_reference):  Guard against
+	blindly using NULL return value from lookup_symbol.
+
 Sun Jul  5 09:46:43 1992  Stu Grossman  (grossman at cygnus.com)
 
 	* cadillac.c, cadillac-patches:  Rename to energize.c and

gdb/Makefile.in

@@ -162,7 +162,7 @@ CDEPS = ${XM_CDEPS} ${TM_CDEPS} ${BFD_LIB} ${MMALLOC_LIB} ${LIBIBERTY} \
 ADD_FILES = ${REGEX} ${ALLOCA} ${XM_ADD_FILES} ${TM_ADD_FILES}
 ADD_DEPS = ${REGEX1} ${ALLOCA1} ${XM_ADD_FILES} ${TM_ADD_FILES}
 
-VERSION = 4.5.6
+VERSION = 4.5.7
 DIST=gdb
 
 LINT=/usr/5bin/lint

gdb/cplus-dem.c

@@ -1578,7 +1578,9 @@ demangle_args (declp, type, work)
 #ifdef ARM_DEMANGLING
 	  t--;
 #endif
-	  if (t >= work -> ntypes)
+	  /* Validate the type index.  Protect against illegal indices from
+	     malformed type strings. */
+	  if ((t < 0) || (t >= work -> ntypes))
 	    {
 	      return (0);
 	    }