Fix out-of-bounds in gcov.c (PR gcov-profile/85871).

2018-09-17  Martin Liska  <mliska@suse.cz>

	PR gcov-profile/85871
	* gcov.c (output_intermediate_file): Fix out of bounds
	access.

From-SVN: r264363

2 files changed, 8 insertions, 1 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 44700f5..3b6af9e 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2018-09-17  Martin Liska  <mliska@suse.cz>
+
+	PR gcov-profile/85871
+	* gcov.c (output_intermediate_file): Fix out of bounds
+	access.
+
 2018-09-17  Vineet Gupta  <vgupta@synopsys.com>
 
 	* config/arc/arc.c: Object attributes for core4 not reflected
diff --git a/gcc/gcov.c b/gcc/gcov.c
index 64ab85c..c09d506 100644
--- a/gcc/gcov.c
+++ b/gcc/gcov.c
@@ -1097,7 +1097,8 @@ output_intermediate_file (FILE *gcov_file, source_info *src)
 	}
 
       /* Follow with lines associated with the source file.  */
-      output_intermediate_line (gcov_file, &src->lines[line_num], line_num);
+      if (line_num < src->lines.size ())
+	output_intermediate_line (gcov_file, &src->lines[line_num], line_num);
     }
 }