From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out-185.mta0.migadu.com (out-185.mta0.migadu.com [91.218.175.185]) (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 3E8732E9EA7 for ; Thu, 24 Jul 2025 15:15:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=91.218.175.185 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753370139; cv=none; b=pAqSMFLCFILwJWYa9+grur6j3PCnHM6Pes911qrqsSu+pkwzHwECxCkwYHdh2jYxGT3qSaSRfBnumfqqR/y2o9h8kSsykNXtHs5TVgcxJy9jMBfAKZVJR0hSoUnwGd/rIEHrl0Z/NztL3mt6s75jT33lC/gQjky/Li7iUJSFGF4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753370139; c=relaxed/simple; bh=7EsDP/Fm9RStnbVDQxKJFKXsDu1UwZfNu5wEoQXfbNk=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=GowUjcBa6zR8ZMUm3TV6ACk9WA27pdYBBWMFC6Xm7wq3f6Lx1FnoRORMdOljya4CEn25W+f2h24M01tSe43thx1XmZQRUA8SNy1jKEi3F8Riz9XXHMJtoTHOW93ejbgUUZkMegFf6Cjmq6oKLIA/daN2QsTytRpWRchVKPM3oWA= 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=gTh4jrgI; arc=none smtp.client-ip=91.218.175.185 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="gTh4jrgI" 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=1753370135; 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=gB/b4dExKC5RzJhSjSIUjOlVRtfW8Hfg6IyEFR+9/TA=; b=gTh4jrgIYcgHC2Sj0/xMTM5uelqaEmG24T3lDSDU5/oqyGEHxQWBezCqljCKYUfJE9oTn+ EO6GIHtz+hwIay6h3Mkt1jvd2u/i/Uk9frmd3X0l8CSOG7jy7DpoLiclzZ+r4omXWi6rLp T5oMR7QTWmBx/te9PaTwm2bcfckDkk0= 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 v4 3/4] selftests/bpf: Add selftest for attaching tracing programs to functions in deny list Date: Thu, 24 Jul 2025 23:14:53 +0800 Message-ID: <20250724151454.499040-4-kafai.wan@linux.dev> In-Reply-To: <20250724151454.499040-1-kafai.wan@linux.dev> References: <20250724151454.499040-1-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 Acked-by: Yonghong Song --- .../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..39b59276884a 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; + + /* __rcu_read_lock depends on CONFIG_PREEMPT_RCU */ + btf_id = libbpf_find_vmlinux_btf_id("__rcu_read_lock", 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 '__rcu_read_lock' 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..58d2777014e1 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/__rcu_read_lock") +int BPF_PROG(tracing_deny) +{ + return 0; +} -- 2.43.0