From patchwork Wed Apr 8 23:57:53 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thadeu Lima de Souza Cascardo X-Patchwork-Id: 11481107 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id DEF2C92A for ; Wed, 8 Apr 2020 23:58:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B9CA720787 for ; Wed, 8 Apr 2020 23:58:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726530AbgDHX6O (ORCPT ); Wed, 8 Apr 2020 19:58:14 -0400 Received: from youngberry.canonical.com ([91.189.89.112]:53208 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726510AbgDHX6O (ORCPT ); Wed, 8 Apr 2020 19:58:14 -0400 Received: from 1.general.cascardo.us.vpn ([10.172.70.58] helo=localhost.localdomain) by youngberry.canonical.com with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.86_2) (envelope-from ) id 1jMKaC-0001Kx-Ef; Wed, 08 Apr 2020 23:58:12 +0000 From: Thadeu Lima de Souza Cascardo To: bpf@vger.kernel.org Cc: netdev@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, keescook@chromium.org, luto@amacapital.net, wad@chromium.org, shuah@kernel.org Subject: [PATCH] selftests/seccomp: allow clock_nanosleep instead of nanosleep Date: Wed, 8 Apr 2020 20:57:53 -0300 Message-Id: <20200408235753.8566-1-cascardo@canonical.com> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 Sender: linux-kselftest-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org glibc 2.31 calls clock_nanosleep when its nanosleep function is used. So the restart_syscall fails after that. In order to deal with it, we trace clock_nanosleep and nanosleep. Then we check for either. This works just fine on systems with both glibc 2.30 and glibc 2.31, whereas it failed before on a system with glibc 2.31. Signed-off-by: Thadeu Lima de Souza Cascardo Acked-by: Kees Cook --- tools/testing/selftests/seccomp/seccomp_bpf.c | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) diff --git a/tools/testing/selftests/seccomp/seccomp_bpf.c b/tools/testing/selftests/seccomp/seccomp_bpf.c index 89fb3e0b552e..c0aa46ce14f6 100644 --- a/tools/testing/selftests/seccomp/seccomp_bpf.c +++ b/tools/testing/selftests/seccomp/seccomp_bpf.c @@ -2803,12 +2803,13 @@ TEST(syscall_restart) offsetof(struct seccomp_data, nr)), #ifdef __NR_sigreturn - BPF_JUMP(BPF_JMP|BPF_JEQ|BPF_K, __NR_sigreturn, 6, 0), + BPF_JUMP(BPF_JMP|BPF_JEQ|BPF_K, __NR_sigreturn, 7, 0), #endif - BPF_JUMP(BPF_JMP|BPF_JEQ|BPF_K, __NR_read, 5, 0), - BPF_JUMP(BPF_JMP|BPF_JEQ|BPF_K, __NR_exit, 4, 0), - BPF_JUMP(BPF_JMP|BPF_JEQ|BPF_K, __NR_rt_sigreturn, 3, 0), - BPF_JUMP(BPF_JMP|BPF_JEQ|BPF_K, __NR_nanosleep, 4, 0), + BPF_JUMP(BPF_JMP|BPF_JEQ|BPF_K, __NR_read, 6, 0), + BPF_JUMP(BPF_JMP|BPF_JEQ|BPF_K, __NR_exit, 5, 0), + BPF_JUMP(BPF_JMP|BPF_JEQ|BPF_K, __NR_rt_sigreturn, 4, 0), + BPF_JUMP(BPF_JMP|BPF_JEQ|BPF_K, __NR_nanosleep, 5, 0), + BPF_JUMP(BPF_JMP|BPF_JEQ|BPF_K, __NR_clock_nanosleep, 4, 0), BPF_JUMP(BPF_JMP|BPF_JEQ|BPF_K, __NR_restart_syscall, 4, 0), /* Allow __NR_write for easy logging. */ @@ -2895,7 +2896,8 @@ TEST(syscall_restart) ASSERT_EQ(PTRACE_EVENT_SECCOMP, (status >> 16)); ASSERT_EQ(0, ptrace(PTRACE_GETEVENTMSG, child_pid, NULL, &msg)); ASSERT_EQ(0x100, msg); - EXPECT_EQ(__NR_nanosleep, get_syscall(_metadata, child_pid)); + ret = get_syscall(_metadata, child_pid); + EXPECT_TRUE(ret == __NR_nanosleep || ret == __NR_clock_nanosleep); /* Might as well check siginfo for sanity while we're here. */ ASSERT_EQ(0, ptrace(PTRACE_GETSIGINFO, child_pid, NULL, &info));