samples/bpf: Fix a resource leak

The opened file should be closed in show_sockopts(), otherwise resource
leak will occur that this problem was discovered by reading code

Signed-off-by: Zhu Jun <zhujun2@cmss.chinamobile.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20241010014126.2573-1-zhujun2@cmss.chinamobile.com

diff --git a/samples/bpf/test_cgrp2_sock.c b/samples/bpf/test_cgrp2_sock.c
index a0811df888f4530465af7cae9e4eaf7a0512e797..8ca2a445ffa15542ded0a931dc9a4c08c948f37b 100644 (file)
--- a/samples/bpf/test_cgrp2_sock.c
+++ b/samples/bpf/test_cgrp2_sock.c
@@ -178,8 +178,10 @@ static int show_sockopts(int family)
                return 1;
        }
 
-       if (get_bind_to_device(sd, name, sizeof(name)) < 0)
+       if (get_bind_to_device(sd, name, sizeof(name)) < 0) {
+               close(sd);
                return 1;
+       }
 
        mark = get_somark(sd);
        prio = get_priority(sd);