From: Jiri Olsa <jolsa@kernel.org>
To: Oleg Nesterov <oleg@redhat.com>,
Peter Zijlstra <peterz@infradead.org>,
Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Andrii Nakryiko <andrii@kernel.org>
Cc: 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@fomichev.me>, Hao Luo <haoluo@google.com>,
Steven Rostedt <rostedt@goodmis.org>,
Masami Hiramatsu <mhiramat@kernel.org>,
linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org
Subject: [PATCHv4 05/14] bpf: Allow return values 0 and 1 for uprobe/kprobe session
Date: Tue, 17 Sep 2024 10:50:15 +0200 [thread overview]
Message-ID: <20240917085024.765883-6-jolsa@kernel.org> (raw)
In-Reply-To: <20240917085024.765883-1-jolsa@kernel.org>
The uprobe and kprobe session program can return only 0 or 1,
instruct verifier to check for that.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
kernel/bpf/verifier.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
index d8520095ca03..988858fc37e5 100644
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -15668,6 +15668,16 @@ static int check_return_code(struct bpf_verifier_env *env, int regno, const char
return -ENOTSUPP;
}
break;
+ case BPF_PROG_TYPE_KPROBE:
+ switch (env->prog->expected_attach_type) {
+ case BPF_TRACE_KPROBE_SESSION:
+ case BPF_TRACE_UPROBE_SESSION:
+ range = retval_range(0, 1);
+ break;
+ default:
+ return 0;
+ }
+ break;
case BPF_PROG_TYPE_SK_LOOKUP:
range = retval_range(SK_DROP, SK_PASS);
break;
--
2.46.0
next prev parent reply other threads:[~2024-09-17 8:51 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-09-17 8:50 [PATCHv4 00/14] uprobe, bpf: Add session support Jiri Olsa
2024-09-17 8:50 ` [PATCHv4 01/14] uprobe: Add data pointer to consumer handlers Jiri Olsa
2024-09-17 8:50 ` [PATCHv4 02/14] uprobe: Add support for session consumer Jiri Olsa
2024-09-17 12:03 ` Oleg Nesterov
2024-09-17 12:51 ` Jiri Olsa
2024-09-22 15:27 ` Oleg Nesterov
2024-09-23 8:05 ` Jiri Olsa
2024-09-23 10:05 ` Oleg Nesterov
2024-09-23 11:02 ` Jiri Olsa
2024-09-23 12:13 ` Oleg Nesterov
2024-09-17 12:22 ` Oleg Nesterov
2024-09-17 8:50 ` [PATCHv4 03/14] bpf: Add support for uprobe multi session attach Jiri Olsa
2024-09-17 8:50 ` [PATCHv4 04/14] bpf: Add support for uprobe multi session context Jiri Olsa
2024-09-17 8:50 ` Jiri Olsa [this message]
2024-09-17 8:50 ` [PATCHv4 06/14] libbpf: Fix uretprobe.multi.s programs auto attachment Jiri Olsa
2024-09-17 8:50 ` [PATCHv4 07/14] libbpf: Add support for uprobe multi session attach Jiri Olsa
2024-09-17 8:50 ` [PATCHv4 08/14] selftests/bpf: Add uprobe session test Jiri Olsa
2024-09-17 8:50 ` [PATCHv4 09/14] selftests/bpf: Add uprobe session cookie test Jiri Olsa
2024-09-17 8:50 ` [PATCHv4 10/14] selftests/bpf: Add uprobe session recursive test Jiri Olsa
2024-09-17 8:50 ` [PATCHv4 11/14] selftests/bpf: Add uprobe session verifier test for return value Jiri Olsa
2024-09-17 8:50 ` [PATCHv4 12/14] selftests/bpf: Add kprobe " Jiri Olsa
2024-09-17 8:50 ` [PATCHv4 13/14] selftests/bpf: Add uprobe session single consumer test Jiri Olsa
2024-09-17 8:50 ` [PATCHv4 14/14] selftests/bpf: Add consumers stress test on single uprobe Jiri Olsa
2024-09-23 8:34 ` [PATCHv4 00/14] uprobe, bpf: Add session support patchwork-bot+netdevbpf
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