[PATCH 03/10] perf hists browser: Fix possible memory leak

From: Namhyung Kim
Date: Wed Apr 22 2015 - 03:21:24 EST


The options array saves strings for each popup menu item. The number of
items can be vary according to the currently selected item. So it can
leak some memory if it's exited from a small item. Fix it by freeing
all items when loop terminates.

Signed-off-by: Namhyung Kim <namhyung@xxxxxxxxxx>
---
tools/perf/ui/browsers/hists.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c
index 995b7a8596b1..0972d4722297 100644
--- a/tools/perf/ui/browsers/hists.c
+++ b/tools/perf/ui/browsers/hists.c
@@ -1424,7 +1424,8 @@ static int perf_evsel__hists_browse(struct perf_evsel *evsel, int nr_events,
struct hist_browser *browser = hist_browser__new(hists);
struct branch_info *bi;
struct pstack *fstack;
- char *options[16];
+#define MAX_OPTIONS 16
+ char *options[MAX_OPTIONS];
int nr_options = 0;
int key = -1;
char buf[64];
@@ -1691,7 +1692,8 @@ skip_annotation:
"Switch to another data file in PWD") > 0)
switch_data = nr_options++;
add_exit_option:
- options[nr_options++] = (char *)"Exit";
+ if (asprintf(&options[nr_options], "Exit") > 0)
+ nr_options++;
retry_popup_menu:
choice = ui__popup_menu(nr_options, options);

@@ -1812,7 +1814,7 @@ out_free_stack:
pstack__delete(fstack);
out:
hist_browser__delete(browser);
- free_popup_options(options, nr_options - 1);
+ free_popup_options(options, MAX_OPTIONS);
return key;
}

--
2.3.5

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/