[PATCH v3] selftests: net: avoid memory leak

[Zongmin Zhou]

From: Zongmin Zhou <zhouzong...@kylinos.cn>

The buffer be used without free,fix it to avoid memory leak.

Signed-off-by: Zongmin Zhou <zhouzong...@kylinos.cn>
---
Changes in v3:
- move freeaddrinfo() to a separate label.
Changes in v2:
- add the label to use instead of directly to use on each case.
---
 tools/testing/selftests/net/cmsg_sender.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/tools/testing/selftests/net/cmsg_sender.c 
b/tools/testing/selftests/net/cmsg_sender.c
index a825e628aee7..ded9b925865e 100644
--- a/tools/testing/selftests/net/cmsg_sender.c
+++ b/tools/testing/selftests/net/cmsg_sender.c
@@ -491,7 +491,8 @@ int main(int argc, char *argv[])
        if (err) {
                fprintf(stderr, "Can't resolve address [%s]:%s\n",
                        opt.host, opt.service);
-               return ERN_SOCK_CREATE;
+               err = ERN_SOCK_CREATE;
+               goto err_free_buff;
        }
 
        if (ai->ai_family == AF_INET6 && opt.sock.proto == IPPROTO_ICMP)
@@ -500,8 +501,8 @@ int main(int argc, char *argv[])
        fd = socket(ai->ai_family, opt.sock.type, opt.sock.proto);
        if (fd < 0) {
                fprintf(stderr, "Can't open socket: %s\n", strerror(errno));
-               freeaddrinfo(ai);
-               return ERN_RESOLVE;
+               err = ERN_RESOLVE;
+               goto err_free_info;
        }
 
        if (opt.sock.proto == IPPROTO_ICMP) {
@@ -574,6 +575,9 @@ int main(int argc, char *argv[])
 
 err_out:
        close(fd);
+err_free_info:
        freeaddrinfo(ai);
+err_free_buff:
+       free(buf);
        return err;
 }
-- 
2.34.1