netdev - [PATCH bpf 1/2] tools: bpftool: maps: close json array on error paths of show

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Date:   Fri, 22 Dec 2017 11:36:05 -0800
From:   Jakub Kicinski <jakub.kicinski@...ronome.com>
To:     netdev@...r.kernel.org, daniel@...earbox.net,
        alexei.starovoitov@...il.com
Cc:     oss-drivers@...ronome.com,
        Jakub Kicinski <jakub.kicinski@...ronome.com>
Subject: [PATCH bpf 1/2] 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@...ronome.com>
Acked-by: Quentin Monnet <quentin.monnet@...ronome.com>
---
 tools/bpf/bpftool/map.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/tools/bpf/bpftool/map.c b/tools/bpf/bpftool/map.c
index e2450c8e88e6..8368b7ea31b5 100644
--- 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)
-- 
2.15.1