From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out-173.mta0.migadu.com (out-173.mta0.migadu.com [91.218.175.173]) (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 32B50279788 for ; Tue, 22 Jul 2025 15:35:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=91.218.175.173 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753198546; cv=none; b=I3BltKUAw1lLWAvn+AVdqSPcL2tznmHkYH4Q026gjp/uDM1/9TyKmJNfHhGahmrfF3gzX1Py0Mj7DcpBnQN+NeMNe5SVfQ+45n1QWe7NhS9j4s5nUpv/+oDqhaIeHMjwA8k10hYwnhuq0PQaWtbGc6SCGmnjvD6eZTL9/o7fsBU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753198546; c=relaxed/simple; bh=9e+XKFTuYCdgCVl3Q/4BvVejCNYn6MdSnw4Hrx+qNv8=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=h1fXO57jJC3SZEDT7Sli27m64aeNLPUOJ+KfAGwbM3HFtgFtZZoXpeT0ZOfR5FA8M31sGY/LK2oCjM0Vi3YNSOSfPmI0wr/K+I4nVO9FQEon3LgtJxOwLSoyWdXiSou+kYnl48rghh6KAKpggVWL2axutCd3CZYOaKH2M5Pvvck= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=bqJBRSpm; arc=none smtp.client-ip=91.218.175.173 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="bqJBRSpm" X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1753198542; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=mKvCoJGwfEdOcx6kKVh6JIG3YvhFXp1tkarpnDQix0E=; b=bqJBRSpmZYEXLm8VW24lyyvd4RansGm7NCdEVx+EW6qIO1BFoSjJit0HKXpDMn9CsuWLdz aT7muHovUxe6StfTxt2TStSKJpKoWfnxtuXPHz2c4OXfkb/+ncIor0Mj4To5gOHeS53gGI 61sBQFQ0PhXufvi1J7W1GGLpPsfYRg4= From: KaFai Wan To: ast@kernel.org, daniel@iogearbox.net, john.fastabend@gmail.com, andrii@kernel.org, martin.lau@linux.dev, eddyz87@gmail.com, song@kernel.org, yonghong.song@linux.dev, kpsingh@kernel.org, sdf@fomichev.me, haoluo@google.com, jolsa@kernel.org, mykolal@fb.com, shuah@kernel.org, kafai.wan@linux.dev, laoar.shao@gmail.com, linux-kernel@vger.kernel.org, bpf@vger.kernel.org, linux-kselftest@vger.kernel.org, leon.hwang@linux.dev Subject: [PATCH bpf-next v3 3/4] selftests/bpf: Add selftest for attaching tracing programs to functions in deny list Date: Tue, 22 Jul 2025 23:34:33 +0800 Message-ID: <20250722153434.20571-4-kafai.wan@linux.dev> In-Reply-To: <20250722153434.20571-1-kafai.wan@linux.dev> References: <20250722153434.20571-1-kafai.wan@linux.dev> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT The result: $ tools/testing/selftests/bpf/test_progs -t tracing_failure/tracing_deny #468/3 tracing_failure/tracing_deny:OK #468 tracing_failure:OK Summary: 1/1 PASSED, 0 SKIPPED, 0 FAILED Signed-off-by: KaFai Wan --- .../bpf/prog_tests/tracing_failure.c | 33 +++++++++++++++++++ .../selftests/bpf/progs/tracing_failure.c | 6 ++++ 2 files changed, 39 insertions(+) diff --git a/tools/testing/selftests/bpf/prog_tests/tracing_failure.c b/tools/testing/selftests/bpf/prog_tests/tracing_failure.c index a222df765bc3..140fb0d175cf 100644 --- a/tools/testing/selftests/bpf/prog_tests/tracing_failure.c +++ b/tools/testing/selftests/bpf/prog_tests/tracing_failure.c @@ -28,10 +28,43 @@ static void test_bpf_spin_lock(bool is_spin_lock) tracing_failure__destroy(skel); } +static void test_tracing_deny(void) +{ + struct tracing_failure *skel; + char log_buf[256]; + int btf_id, err; + + /* migrate_disable depends on CONFIG_SMP */ + btf_id = libbpf_find_vmlinux_btf_id("migrate_disable", BPF_TRACE_FENTRY); + if (btf_id <= 0) { + test__skip(); + return; + } + + skel = tracing_failure__open(); + if (!ASSERT_OK_PTR(skel, "tracing_failure__open")) + return; + + bpf_program__set_autoload(skel->progs.tracing_deny, true); + bpf_program__set_log_buf(skel->progs.tracing_deny, log_buf, sizeof(log_buf)); + + err = tracing_failure__load(skel); + if (!ASSERT_ERR(err, "tracing_failure__load")) + goto out; + + ASSERT_HAS_SUBSTR(log_buf, + "Attaching tracing programs to function 'migrate_disable' is rejected.", + "log_buf"); +out: + tracing_failure__destroy(skel); +} + void test_tracing_failure(void) { if (test__start_subtest("bpf_spin_lock")) test_bpf_spin_lock(true); if (test__start_subtest("bpf_spin_unlock")) test_bpf_spin_lock(false); + if (test__start_subtest("tracing_deny")) + test_tracing_deny(); } diff --git a/tools/testing/selftests/bpf/progs/tracing_failure.c b/tools/testing/selftests/bpf/progs/tracing_failure.c index d41665d2ec8c..dfa152e8194e 100644 --- a/tools/testing/selftests/bpf/progs/tracing_failure.c +++ b/tools/testing/selftests/bpf/progs/tracing_failure.c @@ -18,3 +18,9 @@ int BPF_PROG(test_spin_unlock, struct bpf_spin_lock *lock) { return 0; } + +SEC("?fentry/migrate_disable") +int BPF_PROG(tracing_deny) +{ + return 0; +} -- 2.43.0