From nobody Mon Feb 9 08:29:13 2026 Received: from m16.mail.163.com (m16.mail.163.com [220.197.31.5]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 16BDC25DAF4; Mon, 14 Apr 2025 09:35:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=220.197.31.5 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744623318; cv=none; b=DlKPdUhLaoTi2DSA7eZe4Kj4IzDf02QSqFpGSDNa1VgOalLlvcT0Oe2bzK0nK7QLchSct8+9FEgOOWIr6iJz9XhTJgSd3YYTToL2pjGLmRkKHMfnAEeVS2XH1WCF+PEYNyIZKHX4Sz+w4tFRueLvUmvpyf0KGzvMiiZiWAfNozc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744623318; c=relaxed/simple; bh=F/5d1IghKb0pg2zSrK+aro4P7knuhG6MLhzJzvNfyUA=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=Sq9+SH2ANUv9Aa/zHQQR2b07GHKMWxdxTT6e41OG89HrQxqZa3+ocJOf17QiGv796xJIlESdPH07tMCpqv3MUBRhQTB6XOA4Ocoz/ZXZoqumgLlqNwexNOreTrDEXouUxHr6eoJ6OEUSMI3bbFpQjTTbP8NPqKBxpIObGGB8WdE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com; spf=pass smtp.mailfrom=163.com; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b=ehn8t9YI; arc=none smtp.client-ip=220.197.31.5 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=163.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b="ehn8t9YI" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=From:Subject:Date:Message-Id:MIME-Version; bh=OC0HT YodGB+352Xa0PvGM8HnRnVdjQBVMt67uxyrdSA=; b=ehn8t9YIhv7ibOc7sb/E0 OyYbg8zrqvJGpkcYejDrqE5QIUkspA8J8jj2RcGcZNKmyIKHuSU+Sths1ZRPSG3A +C8dmBdrrfXpt7YCluGbllj+pY7FdInR+FYD5EERcp9EWhmLspHKMo7VFTI3XjLL Y6ZRkwjDKHCkwxfgB4yKR4= Received: from localhost.localdomain (unknown []) by gzga-smtp-mtada-g1-2 (Coremail) with SMTP id _____wDnj1Sb1vxnxkYWGg--.23370S4; Mon, 14 Apr 2025 17:34:23 +0800 (CST) From: Feng Yang To: ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org, martin.lau@linux.dev, eddyz87@gmail.com, song@kernel.org, yonghong.song@linux.dev, john.fastabend@gmail.com, kpsingh@kernel.org, sdf@fomichev.me, haoluo@google.com, jolsa@kernel.org, hengqi.chen@gmail.com Cc: bpf@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 bpf-next 2/3] selftests/bpf: Add test for attaching uprobe with long event names Date: Mon, 14 Apr 2025 17:34:01 +0800 Message-Id: <20250414093402.384872-3-yangfeng59949@163.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20250414093402.384872-1-yangfeng59949@163.com> References: <20250414093402.384872-1-yangfeng59949@163.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 X-CM-TRANSID: _____wDnj1Sb1vxnxkYWGg--.23370S4 X-Coremail-Antispam: 1Uf129KBjvJXoWxAF4DCw4fXF13GFyDWFW8Xrb_yoW5WF4fpa 1v9ryYkF45X3W29FZ8G34qkr4rtr18Gr1xGr1Dtr13XF4UWF1xXry7AF4YyFnxJrZav3W5 A3y3tryUWay7ZFDanT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDUYxBIdaVFxhVjvjDU0xZFpf9x07j7R6rUUUUU= X-CM-SenderInfo: p1dqww5hqjkmqzuzqiywtou0bp/1tbiwhwveGf808xdSAABsZ Content-Type: text/plain; charset="utf-8" From: Feng Yang This test verifies that attaching uprobe/uretprobe with long event names does not trigger EINVAL errors. Signed-off-by: Feng Yang --- .../selftests/bpf/prog_tests/attach_probe.c | 49 +++++++++++++++++++ 1 file changed, 49 insertions(+) diff --git a/tools/testing/selftests/bpf/prog_tests/attach_probe.c b/tools/= testing/selftests/bpf/prog_tests/attach_probe.c index 329c7862b52d..9b7f36f39c32 100644 --- a/tools/testing/selftests/bpf/prog_tests/attach_probe.c +++ b/tools/testing/selftests/bpf/prog_tests/attach_probe.c @@ -122,6 +122,52 @@ static void test_attach_probe_manual(enum probe_attach= _mode attach_mode) test_attach_probe_manual__destroy(skel); } =20 +/* attach uprobe/uretprobe long event name testings */ +static void test_attach_uprobe_long_event_name(void) +{ + DECLARE_LIBBPF_OPTS(bpf_uprobe_opts, uprobe_opts); + struct bpf_link *uprobe_link, *uretprobe_link; + struct test_attach_probe_manual *skel; + ssize_t uprobe_offset; + char path[PATH_MAX] =3D {0}; + + skel =3D test_attach_probe_manual__open_and_load(); + if (!ASSERT_OK_PTR(skel, "skel_kprobe_manual_open_and_load")) + return; + + uprobe_offset =3D get_uprobe_offset(&trigger_func); + if (!ASSERT_GE(uprobe_offset, 0, "uprobe_offset")) + goto cleanup; + + if (!ASSERT_GT(readlink("/proc/self/exe", path, PATH_MAX - 1), 0, "readli= nk")) + goto cleanup; + + /* manual-attach uprobe/uretprobe */ + uprobe_opts.attach_mode =3D PROBE_ATTACH_MODE_LEGACY; + uprobe_opts.ref_ctr_offset =3D 0; + uprobe_opts.retprobe =3D false; + uprobe_link =3D bpf_program__attach_uprobe_opts(skel->progs.handle_uprobe, + 0 /* self pid */, + path, + uprobe_offset, + &uprobe_opts); + if (!ASSERT_OK_PTR(uprobe_link, "attach_uprobe_long_event_name")) + goto cleanup; + skel->links.handle_uprobe =3D uprobe_link; + + uprobe_opts.retprobe =3D true; + uretprobe_link =3D bpf_program__attach_uprobe_opts(skel->progs.handle_ure= tprobe, + -1 /* any pid */, + path, + uprobe_offset, &uprobe_opts); + if (!ASSERT_OK_PTR(uretprobe_link, "attach_uretprobe_long_event_name")) + goto cleanup; + skel->links.handle_uretprobe =3D uretprobe_link; + +cleanup: + test_attach_probe_manual__destroy(skel); +} + static void test_attach_probe_auto(struct test_attach_probe *skel) { struct bpf_link *uprobe_err_link; @@ -323,6 +369,9 @@ void test_attach_probe(void) if (test__start_subtest("uprobe-ref_ctr")) test_uprobe_ref_ctr(skel); =20 + if (test__start_subtest("uprobe-long_name")) + test_attach_uprobe_long_event_name(); + cleanup: test_attach_probe__destroy(skel); ASSERT_EQ(uprobe_ref_ctr, 0, "uprobe_ref_ctr_cleanup"); --=20 2.43.0