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bpf: Fix uprobe_multi get_pid_task error path

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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>
Reviewed-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20230915101420.1193800-1-jolsa@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Jiri Olsa 2023-09-15 12:14:20 +02:00 committed by Alexei Starovoitov
parent dca7acd84e
commit 57eb5e1c5c
1 changed files with 3 additions and 1 deletions
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4
kernel/trace/bpf_trace.c
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@ -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;