[PATCH AUTOSEL 4.19 437/671] tools: bpftool: use correct argument in cgroup errors

Sasha Levin
2020-01-16T17:09:24Z

From: Jakub Kicinski <jakub.kicinski@netronome.com>

[ Upstream commit 6c6874f401e5a0caab3b6a0663169e1fb5e930bb ]

cgroup code tries to use argv[0] as the cgroup path,
but if it fails uses argv[1] to report errors.

Fixes: 5ccda64d38cc ("bpftool: implement cgroup bpf operations")
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Acked-by: Roman Gushchin <guro@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
tools/bpf/bpftool/cgroup.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/tools/bpf/bpftool/cgroup.c b/tools/bpf/bpftool/cgroup.c
index ee7a9765c6b3..adbcd84818f7 100644
--- a/tools/bpf/bpftool/cgroup.c
+++ b/tools/bpf/bpftool/cgroup.c
@@ -164,7 +164,7 @@ static int do_show(int argc, char **argv)

cgroup_fd = open(argv[0], O_RDONLY);
if (cgroup_fd < 0) {
- p_err("can't open cgroup %s", argv[1]);
+ p_err("can't open cgroup %s", argv[0]);
goto exit;
}

@@ -345,7 +345,7 @@ static int do_attach(int argc, char **argv)

cgroup_fd = open(argv[0], O_RDONLY);
if (cgroup_fd < 0) {
- p_err("can't open cgroup %s", argv[1]);
+ p_err("can't open cgroup %s", argv[0]);
goto exit;
}

@@ -403,7 +403,7 @@ static int do_detach(int argc, char **argv)

cgroup_fd = open(argv[0], O_RDONLY);
if (cgroup_fd < 0) {
- p_err("can't open cgroup %s", argv[1]);
+ p_err("can't open cgroup %s", argv[0]);
goto exit;
}

--
2.20.1