--- binutils-2.24-orig/bfd/srec.c	2013-11-04 07:33:37.000000000 -0800
+++ binutils-2.24-fix/bfd/srec.c	2014-08-27 22:28:07.169123490 -0700
@@ -477,6 +477,8 @@
 		goto error_return;
 	      }
 
+	    if (! HEX (hdr + 1))
+	      goto error_return;
 	    check_sum = bytes = HEX (hdr + 1);
 	    if (bytes * 2 > bufsize)
 	      {