From nobody Wed Apr 1 22:01:20 2026 Received: from mail-ed1-f49.google.com (mail-ed1-f49.google.com [209.85.208.49]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2791544DB64 for ; Wed, 1 Apr 2026 14:31:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.208.49 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775053895; cv=none; b=FVq6kgZc1beXaJH5sVbB4hvgmFeEGLBSLOTWE/WxfG7wznIK/TogZIeKeB0hSYW08V18v2a08fMiIjyHhQKiclCD2/VCBqACPcD/r43FLzHBECmveYqq3Wjaognp3HYbXTZc5TBdb/yt68qahn9n6U3kCJxu6aUFARdD6IHTvSQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775053895; c=relaxed/simple; bh=glWcsDDGalFiSacOuqeQ8XYEgwxT09FNo1V5BLl8j8s=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=kJ6KO4VUgsZLDDEZSwg9P6dlejAGAvUOZ0E3Rf5mbxE8lORcmxx+DBF+lsRSJoO1Tf/bhtIk0SaqaornMEXuDShcWoXuvHVomsunakzNSa0AjQRLm/h+itfV5YknC8yXaRLKj73C2mNn3eDTROk5bCiFRL9uhedOdGLv6mFnjHw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=suse.com; spf=pass smtp.mailfrom=suse.com; dkim=pass (2048-bit key) header.d=suse.com header.i=@suse.com header.b=d0SE9Uwe; arc=none smtp.client-ip=209.85.208.49 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=suse.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=suse.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=suse.com header.i=@suse.com header.b="d0SE9Uwe" Received: by mail-ed1-f49.google.com with SMTP id 4fb4d7f45d1cf-66dece07f3fso494207a12.3 for ; Wed, 01 Apr 2026 07:31:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=google; t=1775053892; x=1775658692; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=aDs2LjLXuI3q9xyIbH5MiBpzfTWmmXLZUhlHw8UKTVk=; b=d0SE9UweCOwD+w3U5+pxIrZvEe1urMSkIFkP92XuJpyrd6PR4NqfQjz0MKwuqwKu0W cqxlp/9NvadayBzUhgHp8+J21WELa4V/W49XVLHGLA1wcuVIQnEqWVvb9HckGxRWRxhF wrT5IYCjF6on7a0XoZqNCi786y9aPpaoLBn6TzHQ9RxMDkaH/H7M+SIAz0rI9AintopV y15SgKXzJBDhYBb1NtVWfqhIrhfPaNetzrciB6rHpKQbzrU1/xBVu1RZB0IBM0oK4i9J Tb3cAXbVtvqLWSEWhXprJ+/SJZNhR52jNM6YYQOX0wMfgNlDf1mnlcOcSfn9HVrFCKLW 2f1A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1775053892; x=1775658692; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=aDs2LjLXuI3q9xyIbH5MiBpzfTWmmXLZUhlHw8UKTVk=; b=s42MDsa8lLpZ2YGrr/wx0BeiuWvkNEDf5156WhMQ265+PtaMgZmJeHqWD5MNjg8ojS Tis/Pw2WEjwm0Cxxxoi0gPPoLchYa8hP4OGOltWkox7qoBpiqhu05JLi2hBU0qTgZu5E Nfdq/BO2NM6on8CwbEmnGMhjeJNZ4UGcpGLPJ5cxyMQB40n3XtoNyjOBaouI58rLPA/Q ZF+J4a6YcIdIVINencKLG37xHP/MsADp/wGDnklaguqi8kNoreR0ZtnPRGloaHlZv2XA Nobbu76tH0usv/zEHSQc3kgdZQbEL78oJyXt15TQ3afGZ+rH7dvKUcTlUzyxa6qu5lE3 5S5w== X-Forwarded-Encrypted: i=1; AJvYcCULf9NKBq0rgjhtTUkiioqG3qRtWpSOvCF7OazQ9b0NU9gP6Wnnl4etbRLAiKPbZQpesnu1M99+vK56zAM=@vger.kernel.org X-Gm-Message-State: AOJu0Yx9DdJ03kGaiWwJZi4XszioF9r5g/BTKjdvH+hwCmrFICGw00lr qLQOg1UZ2aXvyrUdYc8KyEJxpZQnn5bpEZHQ61xjB+IPkzpRSEqWnEOiwjwQzGr5w7w= X-Gm-Gg: ATEYQzwteRpeW2EKZ+DL8L/jdCv5x4Prduozpb36gcj0FajmXjVxOFUaQOFjF7g9ozH kXTBsH8sbX8Y91Tv/63tehifh1G4ngVv4NVpca02Y3i+gWIKM1Dk5xX4rtT39M3zDXj9MFYk3tR QMuVwsZZRqIsevLj+q1FqJCPTEp0adTlGKXx8MLBVjb/aGvoViSJb0nbWZgGEeN5C02GA53t764 xyHy2JwFfKng/ZjbTKDPld+PkOVBZOVKOPHhfeDkqts1Cm2HMmLpDin6KHeg6u2RPZGRFaqiU7o IjjAgBoEerAZWZekztL5l1bb1q9DeCkkK87KSqs8wOXxpD1lXXxZ4S0w/dZhqv8joFT191tCM9S DGjLbksdm+kPCb9SLJOrxCTabpCqABJFRj7ZDudEskhEu+U0yTn97690kKkFnNgnpnUkCqGD2BK b13doi0HqHPtkbmAy3xPGgUS4lfwIw54dmHSdfLc4dRyeee756OZZMx0QDda3hHCiUTv1ITtzp X-Received: by 2002:a17:906:f1cc:b0:b9b:5164:9057 with SMTP id a640c23a62f3a-b9c137a9d07mr253197566b.3.1775053892398; Wed, 01 Apr 2026 07:31:32 -0700 (PDT) Received: from f16.localdomain ([121.167.230.140]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2b2427658e4sm199047295ad.48.2026.04.01.07.31.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 01 Apr 2026 07:31:31 -0700 (PDT) From: Hoyeon Lee To: bpf@vger.kernel.org, Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Martin KaFai Lau Cc: Eduard Zingerman , Kumar Kartikeya Dwivedi , Song Liu , Yonghong Song , Jiri Olsa , Shuah Khan , Feng Yang , linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH bpf-next v7 3/3] selftests/bpf: add test for raw-address single kprobe attach Date: Wed, 1 Apr 2026 23:29:31 +0900 Message-ID: <20260401143116.185049-4-hoyeon.lee@suse.com> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260401143116.185049-1-hoyeon.lee@suse.com> References: <20260401143116.185049-1-hoyeon.lee@suse.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Currently, attach_probe covers manual single-kprobe attaches by func_name, but not the raw-address form that the PMU-based single-kprobe path can accept. This commit adds PERF and LINK raw-address coverage. It resolves SYS_NANOSLEEP_KPROBE_NAME through kallsyms, passes the absolute address in bpf_kprobe_opts.offset with func_name =3D NULL, and verifies that kprobe and kretprobe are still triggered. It also verifies that LEGACY rejects the same form. Signed-off-by: Hoyeon Lee Acked-by: Jiri Olsa --- .../selftests/bpf/prog_tests/attach_probe.c | 80 +++++++++++++++++++ 1 file changed, 80 insertions(+) diff --git a/tools/testing/selftests/bpf/prog_tests/attach_probe.c b/tools/= testing/selftests/bpf/prog_tests/attach_probe.c index 9e77e5da7097..d7e276e5f4ba 100644 --- a/tools/testing/selftests/bpf/prog_tests/attach_probe.c +++ b/tools/testing/selftests/bpf/prog_tests/attach_probe.c @@ -123,6 +123,80 @@ static void test_attach_probe_manual(enum probe_attach= _mode attach_mode) test_attach_probe_manual__destroy(skel); } =20 +/* manual attach address-based kprobe/kretprobe testings */ +static void test_attach_kprobe_by_addr(enum probe_attach_mode attach_mode) +{ + LIBBPF_OPTS(bpf_kprobe_opts, kprobe_opts); + struct test_attach_probe_manual *skel; + unsigned long func_addr; + + if (!ASSERT_OK(load_kallsyms(), "load_kallsyms")) + return; + + func_addr =3D ksym_get_addr(SYS_NANOSLEEP_KPROBE_NAME); + if (!ASSERT_NEQ(func_addr, 0UL, "func_addr")) + return; + + skel =3D test_attach_probe_manual__open_and_load(); + if (!ASSERT_OK_PTR(skel, "skel_kprobe_manual_open_and_load")) + return; + + kprobe_opts.attach_mode =3D attach_mode; + kprobe_opts.retprobe =3D false; + kprobe_opts.offset =3D func_addr; + skel->links.handle_kprobe =3D + bpf_program__attach_kprobe_opts(skel->progs.handle_kprobe, + NULL, &kprobe_opts); + if (!ASSERT_OK_PTR(skel->links.handle_kprobe, "attach_kprobe_by_addr")) + goto cleanup; + + kprobe_opts.retprobe =3D true; + skel->links.handle_kretprobe =3D + bpf_program__attach_kprobe_opts(skel->progs.handle_kretprobe, + NULL, &kprobe_opts); + if (!ASSERT_OK_PTR(skel->links.handle_kretprobe, "attach_kretprobe_by_add= r")) + goto cleanup; + + /* trigger & validate kprobe && kretprobe */ + usleep(1); + + ASSERT_EQ(skel->bss->kprobe_res, 1, "check_kprobe_res"); + ASSERT_EQ(skel->bss->kretprobe_res, 2, "check_kretprobe_res"); + +cleanup: + test_attach_probe_manual__destroy(skel); +} + +/* reject legacy address-based kprobe attach */ +static void test_attach_kprobe_legacy_by_addr_reject(void) +{ + LIBBPF_OPTS(bpf_kprobe_opts, kprobe_opts); + struct test_attach_probe_manual *skel; + unsigned long func_addr; + + if (!ASSERT_OK(load_kallsyms(), "load_kallsyms")) + return; + + func_addr =3D ksym_get_addr(SYS_NANOSLEEP_KPROBE_NAME); + if (!ASSERT_NEQ(func_addr, 0UL, "func_addr")) + return; + + skel =3D test_attach_probe_manual__open_and_load(); + if (!ASSERT_OK_PTR(skel, "skel_kprobe_manual_open_and_load")) + return; + + kprobe_opts.attach_mode =3D PROBE_ATTACH_MODE_LEGACY; + kprobe_opts.offset =3D func_addr; + skel->links.handle_kprobe =3D + bpf_program__attach_kprobe_opts(skel->progs.handle_kprobe, + NULL, &kprobe_opts); + ASSERT_ERR_PTR(skel->links.handle_kprobe, "attach_kprobe_legacy_by_addr"); + ASSERT_EQ(libbpf_get_error(skel->links.handle_kprobe), + -EOPNOTSUPP, "attach_kprobe_legacy_by_addr_err"); + + test_attach_probe_manual__destroy(skel); +} + /* attach uprobe/uretprobe long event name testings */ static void test_attach_uprobe_long_event_name(void) { @@ -416,6 +490,12 @@ void test_attach_probe(void) test_attach_probe_manual(PROBE_ATTACH_MODE_PERF); if (test__start_subtest("manual-link")) test_attach_probe_manual(PROBE_ATTACH_MODE_LINK); + if (test__start_subtest("kprobe-perf-by-addr")) + test_attach_kprobe_by_addr(PROBE_ATTACH_MODE_PERF); + if (test__start_subtest("kprobe-link-by-addr")) + test_attach_kprobe_by_addr(PROBE_ATTACH_MODE_LINK); + if (test__start_subtest("kprobe-legacy-by-addr-reject")) + test_attach_kprobe_legacy_by_addr_reject(); =20 if (test__start_subtest("auto")) test_attach_probe_auto(skel); --=20 2.52.0