1 files changed, 6 insertions, 2 deletions

diff --git a/tools/perf/util/time-utils.c b/tools/perf/util/time-utils.c
index 3f7f18f06982..88510ab6450e 100644
--- a/tools/perf/util/time-utils.c
+++ b/tools/perf/util/time-utils.c
@@ -116,7 +116,8 @@ int perf_time__parse_str(struct perf_time_interval *ptime, const char *ostr)
 
 static int parse_percent(double *pcnt, char *str)
 {
-        char *c;
+        char *c, *endptr;
+        double d;
 
         c = strchr(str, '%');
         if (c)
@@ -124,8 +125,11 @@ static int parse_percent(double *pcnt, char *str)
         else
                 return -1;
 
-        *pcnt = atof(str) / 100.0;
+        d = strtod(str, &endptr);
+        if (endptr != str + strlen(str))
+                return -1;
 
+        *pcnt = d / 100.0;
         return 0;
 }