From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 174D2C55179 for ; Tue, 27 Oct 2020 17:06:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B7E9421D24 for ; Tue, 27 Oct 2020 17:06:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1603818398; bh=I20MwEhBrjWc0u8D8h8yFkyBit1jrxm1p5YQf0iq7cc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=YcgRdQwKNOpFzU9mr5PDckI8+rmghWBABHfXWOf5Wx1NL5TGw4WeZVWsA1U4zUmXM pqCTQEuvp/m7FxK61cluPZCeichRNQOlq0nhqcGdJALZt2xlXMeNWZzuIZ/GWYl3oZ hBQjYeulBDixi4BhAvtISgLICdEYpIwaOCrAYSXw= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1787821AbgJ0PAS (ORCPT ); Tue, 27 Oct 2020 11:00:18 -0400 Received: from mail.kernel.org ([198.145.29.99]:56206 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752143AbgJ0Ozg (ORCPT ); Tue, 27 Oct 2020 10:55:36 -0400 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 8487122202; Tue, 27 Oct 2020 14:55:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1603810536; bh=I20MwEhBrjWc0u8D8h8yFkyBit1jrxm1p5YQf0iq7cc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=fROCRSKuBXJXBwE8QiVRTQ2FREZYSg6CMPgTMoXFjhyltv0+ZpCXvpFoVJBOv/O+b XRISGYqRxHdElKJtbCMJMlh5ImpoTOdgt2P+V+H4WJE3mDuaBw+HqO8kLT4V5rkjuG 5wohYLfCYV+qfCsAlVwMop1FYSWKV4EuJCojmg6c= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Andrii Nakryiko , Alexei Starovoitov , Sasha Levin Subject: [PATCH 5.8 172/633] selftests/bpf: Fix test_vmlinux test to use bpf_probe_read_user() Date: Tue, 27 Oct 2020 14:48:35 +0100 Message-Id: <20201027135530.744652761@linuxfoundation.org> X-Mailer: git-send-email 2.29.1 In-Reply-To: <20201027135522.655719020@linuxfoundation.org> References: <20201027135522.655719020@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Andrii Nakryiko [ Upstream commit 02f47faa25db134f6043fb6b12a68b5d4c980bb6 ] The test is reading UAPI kernel structure from user-space. So it doesn't need CO-RE relocations and has to use bpf_probe_read_user(). Fixes: acbd06206bbb ("selftests/bpf: Add vmlinux.h selftest exercising tracing of syscalls") Signed-off-by: Andrii Nakryiko Signed-off-by: Alexei Starovoitov Link: https://lore.kernel.org/bpf/20200818213356.2629020-6-andriin@fb.com Signed-off-by: Sasha Levin --- tools/testing/selftests/bpf/progs/test_vmlinux.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) diff --git a/tools/testing/selftests/bpf/progs/test_vmlinux.c b/tools/testing/selftests/bpf/progs/test_vmlinux.c index 5611b564d3b1c..f54b2293c490f 100644 --- a/tools/testing/selftests/bpf/progs/test_vmlinux.c +++ b/tools/testing/selftests/bpf/progs/test_vmlinux.c @@ -19,12 +19,14 @@ SEC("tp/syscalls/sys_enter_nanosleep") int handle__tp(struct trace_event_raw_sys_enter *args) { struct __kernel_timespec *ts; + long tv_nsec; if (args->id != __NR_nanosleep) return 0; ts = (void *)args->args[0]; - if (BPF_CORE_READ(ts, tv_nsec) != MY_TV_NSEC) + if (bpf_probe_read_user(&tv_nsec, sizeof(ts->tv_nsec), &ts->tv_nsec) || + tv_nsec != MY_TV_NSEC) return 0; tp_called = true; @@ -35,12 +37,14 @@ SEC("raw_tp/sys_enter") int BPF_PROG(handle__raw_tp, struct pt_regs *regs, long id) { struct __kernel_timespec *ts; + long tv_nsec; if (id != __NR_nanosleep) return 0; ts = (void *)PT_REGS_PARM1_CORE(regs); - if (BPF_CORE_READ(ts, tv_nsec) != MY_TV_NSEC) + if (bpf_probe_read_user(&tv_nsec, sizeof(ts->tv_nsec), &ts->tv_nsec) || + tv_nsec != MY_TV_NSEC) return 0; raw_tp_called = true; @@ -51,12 +55,14 @@ SEC("tp_btf/sys_enter") int BPF_PROG(handle__tp_btf, struct pt_regs *regs, long id) { struct __kernel_timespec *ts; + long tv_nsec; if (id != __NR_nanosleep) return 0; ts = (void *)PT_REGS_PARM1_CORE(regs); - if (BPF_CORE_READ(ts, tv_nsec) != MY_TV_NSEC) + if (bpf_probe_read_user(&tv_nsec, sizeof(ts->tv_nsec), &ts->tv_nsec) || + tv_nsec != MY_TV_NSEC) return 0; tp_btf_called = true; -- 2.25.1