From patchwork Thu Oct 10 20:09:53 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jiri Olsa X-Patchwork-Id: 13831056 X-Patchwork-Delegate: mhiramat@kernel.org 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 87B6C15B0F2; Thu, 10 Oct 2024 20:12:26 +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=1728591146; cv=none; b=cC/7MHPOvZnUaxffOTYld3Ya1yV2Bi9tdjcEy/QQdl/6NWmSpLVWr9UjLwzoGbQx2+wA3ez9tCX582NxUu7whGPVKdScgtCBdK+24pY2fgHyl7qb23KBb65Sbq9iG1E+bOFhLxTUPXsHDb4/U/D84Nckl0PK5MLTF9Od1vaHBd4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728591146; c=relaxed/simple; bh=uSy+gDXv0e/W1F1L/aoCy9/PnJuM+20kIhQfaP/dM28=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=NAFPlODblrd2DMFeOalpOeXuxk9pRM8AFcU+VQr9w6xiG+kok3G6o2waTmEX3dpEbPAuR/BzLdhKJeY7KNOvAsbsYuNbopoRLPk0wwwi9RViv/lZ9oQrBueOeY/pPQV4CMaZdYEKZhm3xtXfTtk9kQf01/VPNx6wgV4Kopr+TBY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=LdCho8uA; 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="LdCho8uA" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 23738C4CEC5; Thu, 10 Oct 2024 20:12:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1728591146; bh=uSy+gDXv0e/W1F1L/aoCy9/PnJuM+20kIhQfaP/dM28=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=LdCho8uAmcGy7zbbFuPaDwPil3QAbB/vPEpz77CckmA+FOZT7KHHkkP6pOHDmNBiS WIFwczjPvvcNbMU9zIrUH+9nfXxX7KOexYTKVk5I7Gl3h6ALG9PPQFx4hd/8cI8Yh9 51SXbDakdTA2METgJiwH3WLFHXDi1tRC/dg0plzAmNCaMSjmuB+H9G/UH270q9yxxR I49M7vNFEirfsiJR8iWp2pw/rT0PP+RK+nHW9vz1K+c8ydjjPyRq1ZhXv/GXYr54Uy 4oxDQAoofWrc0qtqqvUey7AOLfXc89sa5qlzuuktP9gC6nyV2N9Zz/H8p+isCLQPxB TOeXkbb9TcZkA== 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: [PATCHv6 bpf-next 12/16] selftests/bpf: Add kprobe session verifier test for return value Date: Thu, 10 Oct 2024 22:09:53 +0200 Message-ID: <20241010200957.2750179-13-jolsa@kernel.org> X-Mailer: git-send-email 2.46.2 In-Reply-To: <20241010200957.2750179-1-jolsa@kernel.org> References: <20241010200957.2750179-1-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 Acked-by: Andrii Nakryiko --- .../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; +}