[PATCH bpf] tools: bpftool: Add missing close before bpftool net attach exit

[Wang Hai <wanghai38@xxxxxxxxxx>]

progfd is created by prog_parse_fd(), before 'bpftool net attach' exit,
it should be closed.

Fixes: 04949ccc273e ("tools: bpftool: add net attach command to attach XDP on interface")
Signed-off-by: Wang Hai <wanghai38@xxxxxxxxxx>
---
 tools/bpf/bpftool/net.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/bpf/bpftool/net.c b/tools/bpf/bpftool/net.c
index 910e7bac6e9e..3e9b40e64fb0 100644
--- a/tools/bpf/bpftool/net.c
+++ b/tools/bpf/bpftool/net.c
@@ -600,12 +600,14 @@ static int do_attach(int argc, char **argv)
 	if (err < 0) {
 		p_err("interface %s attach failed: %s",
 		      attach_type_strings[attach_type], strerror(-err));
+		close(progfd);
 		return err;
 	}
 
 	if (json_output)
 		jsonw_null(json_wtr);
 
+	close(progfd);
 	return 0;
 }
 
-- 
2.17.1