From patchwork Tue Sep 17 08:50:22 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jiri Olsa X-Patchwork-Id: 13806017 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 20C05159583; Tue, 17 Sep 2024 08:52:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726563179; cv=none; b=CybaBH3UhjBGPSSKMNvb5gh3Ep9sZxfAiIiagKRr5xu0mOFZ3+iJeoYbKiQIAEqAdUwmKMvN/uKZEpk2yekW+sfza+uXyNDv8aRYCG906c3HKz1tXefJIBZtlB2UyauZ8bxmdB5AebAlSP+NRe9aoZKWTsob/yG3053G+R0o8UI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726563179; c=relaxed/simple; bh=bHVTr5EPCLxzQcKYcQIlZE5IAbxRZPb3gBZhMsGQwFE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=hZxrCoVaYwy6lHuFkr9734dR90FSGJ0dzAUu4aFUFI/5K0QqFzQJ6Vro2/W8agVK2ZHcxF1ollgdp5jwxIAMLGc8ZnbnI4tbc00naDeBrVU8fDPedKR/OBNaK/FIHnQ1j83byxACEKnLJDhlvTYL4L2QLTNehUI2POCwjx1uowY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=gE73Wtr4; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="gE73Wtr4" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CB454C4CEC5; Tue, 17 Sep 2024 08:52:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1726563179; bh=bHVTr5EPCLxzQcKYcQIlZE5IAbxRZPb3gBZhMsGQwFE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=gE73Wtr4SKaUEP5tS9jKRnim3fmTqUcw4a+PADsWDeqb/EQGzxLoenRUWsBy4CyAc cC1YMTOsxzVzSPIVvZx4O6Oz401rCOzKhd35gu0eqUrSZRUbrL60jJMCjugWxdc+33 6cb3+ajsYrcS2ODC/WFDC2NTJNz8/AI8BlJFIlY3PoVZ9LTZTAKbpTBtmAm/5gNjIE aopO1FMNJ/mV1AvBaeupSrMumV/HZ6RjpBbkcJes/5lki0T3O0CONQiXqGjuQqPTv/ rEZDMAU2FSkOEq890H1vCAmSKO2V9KaFbzNKVi4pdGLcc7VlpRwjrvLVomT6/GUu7B rrldi7I8xzZuQ== From: Jiri Olsa To: Oleg Nesterov , Peter Zijlstra , Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko Cc: bpf@vger.kernel.org, Martin KaFai Lau , Song Liu , Yonghong Song , John Fastabend , KP Singh , Stanislav Fomichev , Hao Luo , Steven Rostedt , Masami Hiramatsu , linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org Subject: [PATCHv4 12/14] selftests/bpf: Add kprobe session verifier test for return value Date: Tue, 17 Sep 2024 10:50:22 +0200 Message-ID: <20240917085024.765883-13-jolsa@kernel.org> X-Mailer: git-send-email 2.46.0 In-Reply-To: <20240917085024.765883-1-jolsa@kernel.org> References: <20240917085024.765883-1-jolsa@kernel.org> Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Making sure kprobe.session program can return only [0,1] values. Signed-off-by: Jiri Olsa --- .../bpf/prog_tests/kprobe_multi_test.c | 2 ++ .../bpf/progs/kprobe_multi_verifier.c | 31 +++++++++++++++++++ 2 files changed, 33 insertions(+) create mode 100644 tools/testing/selftests/bpf/progs/kprobe_multi_verifier.c diff --git a/tools/testing/selftests/bpf/prog_tests/kprobe_multi_test.c b/tools/testing/selftests/bpf/prog_tests/kprobe_multi_test.c index 960c9323d1e0..66ab1cae923e 100644 --- a/tools/testing/selftests/bpf/prog_tests/kprobe_multi_test.c +++ b/tools/testing/selftests/bpf/prog_tests/kprobe_multi_test.c @@ -6,6 +6,7 @@ #include "kprobe_multi_override.skel.h" #include "kprobe_multi_session.skel.h" #include "kprobe_multi_session_cookie.skel.h" +#include "kprobe_multi_verifier.skel.h" #include "bpf/libbpf_internal.h" #include "bpf/hashmap.h" @@ -764,4 +765,5 @@ void test_kprobe_multi_test(void) test_session_skel_api(); if (test__start_subtest("session_cookie")) test_session_cookie_skel_api(); + RUN_TESTS(kprobe_multi_verifier); } diff --git a/tools/testing/selftests/bpf/progs/kprobe_multi_verifier.c b/tools/testing/selftests/bpf/progs/kprobe_multi_verifier.c new file mode 100644 index 000000000000..288577e81deb --- /dev/null +++ b/tools/testing/selftests/bpf/progs/kprobe_multi_verifier.c @@ -0,0 +1,31 @@ +// SPDX-License-Identifier: GPL-2.0 +#include "vmlinux.h" +#include +#include +#include +#include "bpf_misc.h" + +char _license[] SEC("license") = "GPL"; + + +SEC("kprobe.session") +__success +int kprobe_session_return_0(struct pt_regs *ctx) +{ + return 0; +} + +SEC("kprobe.session") +__success +int kprobe_session_return_1(struct pt_regs *ctx) +{ + return 1; +} + +SEC("kprobe.session") +__failure +__msg("At program exit the register R0 has smin=2 smax=2 should have been in [0, 1]") +int kprobe_session_return_2(struct pt_regs *ctx) +{ + return 2; +}