cpupower: fix potential memory leak

Signed-off-by: Thomas Renninger <trenn@suse.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/tools/power/cpupower/bench/parse.c b/tools/power/cpupower/bench/parse.c
index 2d09c9221ff14bb091212398179ef9b5cd775f6a..9b65f052081f354d594ed319eccfe57874bfaa77 100644 (file)
--- a/tools/power/cpupower/bench/parse.c
+++ b/tools/power/cpupower/bench/parse.c
@@ -65,7 +65,7 @@ FILE *prepare_output(const char *dirname)
 {
        FILE *output = NULL;
        int len;
-       char *filename;
+       char *filename, *filename_tmp;
        struct utsname sysdata;
        DIR *dir;
 
@@ -88,13 +88,15 @@ FILE *prepare_output(const char *dirname)
 
        if (uname(&sysdata) == 0) {
                len += strlen(sysdata.nodename) + strlen(sysdata.release);
-               filename = realloc(filename, sizeof(char) * len);
+               filename_tmp = realloc(filename, sizeof(*filename) * len);
 
-               if (!filename) {
+               if (filename_tmp == NULL) {
+                       free(filename);
                        perror("realloc");
                        goto out_dir;
                }
 
+               filename = filename_tmp;
                snprintf(filename, len - 1, "%s/benchmark_%s_%s_%li.log",
                        dirname, sysdata.nodename, sysdata.release, time(NULL));
        } else {