tools/bpftool: Fix error return code in do_batch()

Fix to return a negative error code from the error handling
case instead of 0, as done elsewhere in this function.

Fixes: 668da745af3c2 ("tools: bpftool: add support for quotations ...")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Reviewed-by: Quentin Monnet <quentin@isovalent.com>
Link: https://lore.kernel.org/bpf/20210609115916.2186872-1-chengzhihao1@huawei.com

diff --git a/tools/bpf/bpftool/main.c b/tools/bpf/bpftool/main.c
index 7f2817d..3ddfd48 100644 (file)
--- a/tools/bpf/bpftool/main.c
+++ b/tools/bpf/bpftool/main.c
@@ -341,8 +341,10 @@ static int do_batch(int argc, char **argv)
                n_argc = make_args(buf, n_argv, BATCH_ARG_NB_MAX, lines);
                if (!n_argc)
                        continue;
-               if (n_argc < 0)
+               if (n_argc < 0) {
+                       err = n_argc;
                        goto err_close;
+               }
 
                if (json_output) {
                        jsonw_start_object(json_wtr);