Index: gdb/dwarf2read.c
===================================================================
RCS file: /cvs/src/src/gdb/dwarf2read.c,v
retrieving revision 1.290
diff -u -a -p -u -p -a -r1.290 gdb/dwarf2read.c
--- gdb/dwarf2read.c	24 Oct 2008 18:21:00 -0000	1.290
+++ gdb/dwarf2read.c	27 Oct 2008 14:33:51 -0000
@@ -7090,6 +7090,13 @@ dwarf_decode_lines (struct line_header *
       /* Decode the table.  */
       while (!end_sequence)
 	{
+	  if (line_ptr >= line_end)
+	    {
+	      complaint (&symfile_complaints,
+			 _("mangled .debug_line section"));
+	      return;
+	    }
+
 	  op_code = read_1_byte (abfd, line_ptr);
 	  line_ptr += 1;
 
@@ -7220,7 +7227,7 @@ dwarf_decode_lines (struct line_header *
 
                 file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read);
                 line_ptr += bytes_read;
-                if (lh->num_file_names < file)
+		if (file == 0 || lh->num_file_names < file)
                   dwarf2_debug_line_missing_file_complaint ();
                 else
                   {