[PATCH iproute2] tc: fix memory leak in error path

[Stephen Hemminger]

If value passed to parse_percent was not valid, it would
leak the dynamic allocation from sscanf.

Fixes: 927e3cfb52b5 ("tc: B.W limits can now be specified in %.")
Signed-off-by: Stephen Hemminger <step...@networkplumber.org>
---
 tc/tc_util.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tc/tc_util.c b/tc/tc_util.c
index ab717890bb2a..1377b536e72f 100644
--- a/tc/tc_util.c
+++ b/tc/tc_util.c
@@ -195,7 +195,7 @@ static int parse_percent_rate(char *rate, const char *str, 
const char *dev)
        long dev_mbit;
        int ret;
        double perc, rate_mbit;
-       char *str_perc;
+       char *str_perc = NULL;
 
        if (!dev[0]) {
                fprintf(stderr, "No device specified; specify device to rate 
limit by percentage\n");
@@ -230,6 +230,7 @@ static int parse_percent_rate(char *rate, const char *str, 
const char *dev)
        return 0;
 
 malf:
+       free(str_perc);
        fprintf(stderr, "Specified rate value could not be read or is 
malformed\n");
        return -1;
 }
-- 
2.20.1