Fix another memory access error triggered by attempting to parse a corrupt binary.

	PR 21813
	(alpha_vms_object_p): Check for a truncated record.

diff --git a/bfd/ChangeLog b/bfd/ChangeLog
index a854a12..9ae5da9 100644 (file)
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@@ -22,6 +22,8 @@
        (image_set_ptr): Likewise.
        (alpha_vms_slurp_relocs): Likewise.
 
+       (alpha_vms_object_p): Check for a truncated record.
+
 2017-07-24  Nick Clifton  <nickc@redhat.com>
 
        PR 21803

diff --git a/bfd/vms-alpha.c b/bfd/vms-alpha.c
index 5e9170d..610b034 100644 (file)
--- a/bfd/vms-alpha.c
+++ b/bfd/vms-alpha.c
@@ -2679,6 +2679,9 @@ alpha_vms_object_p (bfd *abfd)
           PRIV (recrd.buf_size) = PRIV (recrd.rec_size);
         }
 
+      /* PR 21813: Check for a truncated record.  */
+      if (PRIV (recrd.rec_size < test_len))
+       goto error_ret;
       /* Read the remaining record.  */
       remaining = PRIV (recrd.rec_size) - test_len;
       to_read = MIN (VMS_BLOCK_SIZE - test_len, remaining);