tools: bpftool: maps: close json array on error paths of show

We can't return from the middle of do_show(), because
json_array will not be closed.  Break out of the loop.
Note that the error handling after the loop depends on
errno, so no need to set err.

Fixes: 831a0aafe5c3 ("tools: bpftool: add JSON output for `bpftool map *` commands")
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Acked-by: Quentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

diff --git a/tools/bpf/bpftool/map.c b/tools/bpf/bpftool/map.c
index e2450c8..8368b7e 100644 (file)
--- a/tools/bpf/bpftool/map.c
+++ b/tools/bpf/bpftool/map.c
@@ -523,21 +523,21 @@ static int do_show(int argc, char **argv)
                                break;
                        p_err("can't get next map: %s%s", strerror(errno),
                              errno == EINVAL ? " -- kernel too old?" : "");
-                       return -1;
+                       break;
                }
 
                fd = bpf_map_get_fd_by_id(id);
                if (fd < 0) {
                        p_err("can't get map by id (%u): %s",
                              id, strerror(errno));
-                       return -1;
+                       break;
                }
 
                err = bpf_obj_get_info_by_fd(fd, &info, &len);
                if (err) {
                        p_err("can't get map info: %s", strerror(errno));
                        close(fd);
-                       return -1;
+                       break;
                }
 
                if (json_output)