[PATCH v1 02/11] perf stat: Smatch: Fix use-after-freed pointer

[Leo Yan]

Based on the following report from Smatch, fix the use-after-freed
pointer.

  tools/perf/builtin-stat.c:1353
  add_default_attributes() warn: passing freed memory 'str'.

The pointer 'str' has been freed but later it is still passed into the
function parse_events_print_error().  This patch fixes this
use-after-freed issue.

Signed-off-by: Leo Yan <leo....@linaro.org>
---
 tools/perf/builtin-stat.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 8a35fc5a7281..de0f6d0e96a2 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -1349,8 +1349,8 @@ static int add_default_attributes(void)
                                fprintf(stderr,
                                        "Cannot set up top down events %s: 
%d\n",
                                        str, err);
-                               free(str);
                                parse_events_print_error(&errinfo, str);
+                               free(str);
                                return -1;
                        }
                } else {
-- 
2.17.1