From: Jiri Olsa <jolsa@kernel.org>
To: Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Andrii Nakryiko <andrii@kernel.org>
Cc: Dan Carpenter <dan.carpenter@linaro.org>,
bpf@vger.kernel.org, Martin KaFai Lau <kafai@fb.com>,
Song Liu <songliubraving@fb.com>, Yonghong Song <yhs@fb.com>,
John Fastabend <john.fastabend@gmail.com>,
KP Singh <kpsingh@chromium.org>,
Stanislav Fomichev <sdf@google.com>, Hao Luo <haoluo@google.com>
Subject: [PATCH bpf] bpf: Fix uprobe_multi get_pid_task error path
Date: Fri, 15 Sep 2023 12:14:20 +0200 [thread overview]
Message-ID: <20230915101420.1193800-1-jolsa@kernel.org> (raw)
Dan reported Smatch static checker warning due to missing error
value set in uprobe multi link's get_pid_task error path.
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Closes: https://lore.kernel.org/bpf/c5ffa7c0-6b06-40d5-aca2-63833b5cd9af@moroto.mountain/
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
kernel/trace/bpf_trace.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c
index c1c1af63ced2..868008f56fec 100644
--- a/kernel/trace/bpf_trace.c
+++ b/kernel/trace/bpf_trace.c
@@ -3223,8 +3223,10 @@ int bpf_uprobe_multi_link_attach(const union bpf_attr *attr, struct bpf_prog *pr
rcu_read_lock();
task = get_pid_task(find_vpid(pid), PIDTYPE_PID);
rcu_read_unlock();
- if (!task)
+ if (!task) {
+ err = -ESRCH;
goto error_path_put;
+ }
}
err = -ENOMEM;
--
2.41.0
next reply other threads:[~2023-09-15 10:14 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-15 10:14 Jiri Olsa [this message]
2023-09-15 14:49 ` [PATCH bpf] bpf: Fix uprobe_multi get_pid_task error path Song Liu
2023-09-15 17:40 ` patchwork-bot+netdevbpf
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