From nobody Sun Feb 8 05:40:33 2026 Received: from out-183.mta0.migadu.com (out-183.mta0.migadu.com [91.218.175.183]) (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 3C056234973; Sun, 4 Jan 2026 16:25:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=91.218.175.183 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767543911; cv=none; b=VvLH0oP5drHGnhRPhOWTQMgvVhxmP9kkQ7P379Yj59V3DdqCt5Cc5zh22uzAhqwaQieKIFlqTrPjIvWqSbe0HbiKm4dxNslIBxFORicx8dFFzR7H6IfQ1KxoW69hEn+aYBG0aJiyica+vhRMIjEF5T6p6cw7k6yt+nk0KDxz1sE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767543911; c=relaxed/simple; bh=LSTTQ1Bw6k7njO8lwuxwQO6h9yNeUWCg0KXwR2Yikd8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=sUcoo27Q+R4WGRl71E1dDUxqXvENq+Db6Xt6J7su4OUoqLiLMEU8Rvuhwnnv4bgoxzAnWg19BsHI1TY7AC869aaEPzKpTz8xyLZj+mYQQjy/MCmObc29atL+vKOu8vkhp4nmfUPvfQ4UllM/01JVcNw0LClTFz/qekbVYO9QtsA= 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=vuVRnV8K; arc=none smtp.client-ip=91.218.175.183 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="vuVRnV8K" 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=1767543906; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=pqbsIbMnN1SRJEl+iPFxJCqCnnA13u+xQvRbspdzZhg=; b=vuVRnV8KsWEl32XjLibUJqTVNuyAgu2Rfq8RAwC0U+f3yHLB0jE+t/S/hmO3+uRW8TzkY1 Igqj2rbXzsy0k2snLJkZd8fi0/Z4YVnnVT9yrGEce7ypmn/GIYwbswno5s2vtQk8OlNSXx qghU0C9WepW1socVTmvBocKOfMzllHM= From: KaFai Wan 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, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, horms@kernel.org, hawk@kernel.org, shuah@kernel.org, aleksander.lobakin@intel.com, toke@redhat.com, bpf@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org Cc: KaFai Wan Subject: [PATCH bpf-next 2/2] selftests/bpf: Add test for xdp_md context with LIVE_FRAMES in BPF_PROG_TEST_RUN Date: Mon, 5 Jan 2026 00:23:50 +0800 Message-ID: <20260104162350.347403-3-kafai.wan@linux.dev> In-Reply-To: <20260104162350.347403-1-kafai.wan@linux.dev> References: <20260104162350.347403-1-kafai.wan@linux.dev> 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-Migadu-Flow: FLOW_OUT Content-Type: text/plain; charset="utf-8" Add a test case uses xdp_md as context parameter for BPF_PROG_TEST_RUN with LIVE_FRAMES flag. The test ensures that potential user-memory-access vulnerabilities are properly prevented. Signed-off-by: KaFai Wan --- .../bpf/prog_tests/xdp_context_test_run.c | 19 +++++++++++++++++++ .../bpf/progs/test_xdp_context_test_run.c | 6 ++++++ 2 files changed, 25 insertions(+) diff --git a/tools/testing/selftests/bpf/prog_tests/xdp_context_test_run.c = b/tools/testing/selftests/bpf/prog_tests/xdp_context_test_run.c index ee94c281888a..0276daaae45c 100644 --- a/tools/testing/selftests/bpf/prog_tests/xdp_context_test_run.c +++ b/tools/testing/selftests/bpf/prog_tests/xdp_context_test_run.c @@ -45,6 +45,7 @@ void test_xdp_context_error(int prog_fd, struct bpf_test_= run_opts opts, void test_xdp_context_test_run(void) { struct test_xdp_context_test_run *skel =3D NULL; + char data_xdp[sizeof(pkt_v4) + XDP_PACKET_HEADROOM]; char data[sizeof(pkt_v4) + sizeof(__u32)]; char bad_ctx[sizeof(struct xdp_md) + 1]; struct xdp_md ctx_in, ctx_out; @@ -55,6 +56,12 @@ void test_xdp_context_test_run(void) .ctx_size_out =3D sizeof(ctx_out), .repeat =3D 1, ); + DECLARE_LIBBPF_OPTS(bpf_test_run_opts, opts_xdp, + .data_in =3D &data_xdp, + .data_size_in =3D sizeof(data_xdp), + .flags =3D BPF_F_TEST_XDP_LIVE_FRAMES, + .repeat =3D 1, + ); int err, prog_fd; =20 skel =3D test_xdp_context_test_run__open_and_load(); @@ -70,6 +77,18 @@ void test_xdp_context_test_run(void) ASSERT_EQ(errno, E2BIG, "extradata-errno"); ASSERT_ERR(err, "bpf_prog_test_run(extradata)"); =20 + memset(&ctx_in, 0, sizeof(ctx_in)); + ctx_in.data_meta =3D 0; + ctx_in.data =3D 0xf4; + ctx_in.data_end =3D sizeof(data_xdp); + opts_xdp.ctx_in =3D &ctx_in; + opts_xdp.ctx_size_in =3D sizeof(ctx_in); + *(__u32 *)(data_xdp + 0) =3D 0x28d6a0b5; + *(__u32 *)(data_xdp + 4) =3D 0xf273eea3; + *(struct ipv4_packet *)(data_xdp + ctx_in.data) =3D pkt_v4; + err =3D bpf_prog_test_run_opts(bpf_program__fd(skel->progs.xdp_pass), &op= ts_xdp); + ASSERT_OK(err, "bpf_prog_test_run(valid meta)"); + *(__u32 *)data =3D XDP_PASS; *(struct ipv4_packet *)(data + sizeof(__u32)) =3D pkt_v4; opts.ctx_in =3D &ctx_in; diff --git a/tools/testing/selftests/bpf/progs/test_xdp_context_test_run.c = b/tools/testing/selftests/bpf/progs/test_xdp_context_test_run.c index d7b88cd05afd..2166928d4680 100644 --- a/tools/testing/selftests/bpf/progs/test_xdp_context_test_run.c +++ b/tools/testing/selftests/bpf/progs/test_xdp_context_test_run.c @@ -17,4 +17,10 @@ int xdp_context(struct xdp_md *xdp) return ret; } =20 +SEC("xdp") +int xdp_pass(struct xdp_md *xdp) +{ + return XDP_PASS; +} + char _license[] SEC("license") =3D "GPL"; --=20 2.43.0