PR22204, Lack of DW_LNE_end_sequence causes "infinite" loop

	PR 22204
	* dwarf2.c (decode_line_info): Ensure line_ptr stays within
	bounds in inner loop.

diff --git a/bfd/ChangeLog b/bfd/ChangeLog
index 54199ad..5c4cc2b 100644 (file)
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@@ -1,3 +1,9 @@
+2017-09-26  Alan Modra  <amodra@gmail.com>
+
+       PR 22204
+       * dwarf2.c (decode_line_info): Ensure line_ptr stays within
+       bounds in inner loop.
+

 2017-09-25  Alan Modra  <amodra@gmail.com>
 
        PR 22202
 2017-09-25  Alan Modra  <amodra@gmail.com>
 
        PR 22202

diff --git a/bfd/dwarf2.c b/bfd/dwarf2.c
index 9ae5fba..2c45790 100644 (file)
--- a/bfd/dwarf2.c
+++ b/bfd/dwarf2.c
@@ -2277,7 +2277,7 @@ decode_line_info (struct comp_unit *unit, struct dwarf2_debug *stash)
       bfd_vma high_pc = 0;
 
       /* Decode the table.  */
       bfd_vma high_pc = 0;
 
       /* Decode the table.  */

-      while (! end_sequence)
+      while (!end_sequence && line_ptr < line_end)

        {
          op_code = read_1_byte (abfd, line_ptr, line_end);
          line_ptr += 1;
        {
          op_code = read_1_byte (abfd, line_ptr, line_end);
          line_ptr += 1;