From patchwork Sat Nov 11 17:38:06 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: swarup X-Patchwork-Id: 744328 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (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 ED526134CC for ; Sat, 11 Nov 2023 17:38:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="EX7YlFSi" Received: from mail-il1-x12d.google.com (mail-il1-x12d.google.com [IPv6:2607:f8b0:4864:20::12d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A2E9D9F; Sat, 11 Nov 2023 09:38:16 -0800 (PST) Received: by mail-il1-x12d.google.com with SMTP id e9e14a558f8ab-357ccaf982eso11242775ab.0; Sat, 11 Nov 2023 09:38:16 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1699724296; x=1700329096; 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=zjn0mx0T4ELUgwN3eqbWBleZXpgBP6Grrg4uPvTk4DY=; b=EX7YlFSi159vq5AXo5ZU3Qk15D2ENYI8JF4Pyg9bQiTuJ9quu5r4H7UYsISZv01wzE cJ19zGHMlM3AnTy3ix6q+tB71l2HYLQkR+rraub3Zc9wX1QMtWBYLwMwG632vUOzf6NQ Ws2RTBG90sm5i3Ebcj/B4k/25NQY8ru5fkpGoLksNFJDPKJaMV0OIchIt609J7Zius6Z MDB9myASZLM6WlUQaD2FEDAPr483L90rfiscdg7YqD/aSoKCx8vsHLV06FF9MWJjPjW6 DnY3Ve5RSay9Xg1KGacHeKo+GK4urdNiSGSZSdwtKxn2s2N4h9tffJY156NWHhqkR3v/ cFjA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1699724296; x=1700329096; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=zjn0mx0T4ELUgwN3eqbWBleZXpgBP6Grrg4uPvTk4DY=; b=biGJTs/lX6i2gEucSbdlXCPx3p31XGVaweaNUwFvE1BZ20dzcRxUaplOHw3t48+HNi mu079W4+AuPTmC2RLskRO5HF/V4a1LfvwHIwp6XBqGjYG4qG2SH5wIMwJ9rH4LarKh03 rBOYtv5IZS1VGY6CrGHBBrYyk7eqx/hvurvhJ/7wN7cqgUdvFNsC93QGfZFGj34LJgpq HThLdELm73HefxXVEQzonai+xeY7KeWPTta3y/NojZkBUGCA2bfeienKEQmCg3MNvEcz HiKZ/Uum7SyKL2WtA/VwgOBzyD+naCSytlHm4SIewASeUQhCOFdoKbXGqaK1sKIg5L+W 1+KA== X-Gm-Message-State: AOJu0YwlsRzvKQdmRyPzl6LrNlYHn/Ul2sEqlo3RugJj6ms8e+toywBp tn6/QJttLjuFOY3TkKPfk7RYeN6gv7ohXg== X-Google-Smtp-Source: AGHT+IF0rJDB1rx0Fbj9KRFWhR+y0qz9rCr0UJv6agGt7mcvW3RqlLKjHpM9emqlz/vIORxwMf8b7Q== X-Received: by 2002:a05:6e02:16c6:b0:359:3150:c69d with SMTP id 6-20020a056e0216c600b003593150c69dmr4152096ilx.9.1699724295984; Sat, 11 Nov 2023 09:38:15 -0800 (PST) Received: from swarup-virtual-machine.localdomain ([171.76.83.22]) by smtp.gmail.com with ESMTPSA id w12-20020aa7858c000000b006b76cb6523dsm1511226pfn.165.2023.11.11.09.38.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 11 Nov 2023 09:38:15 -0800 (PST) From: Swarup Laxman Kotiaklapudi To: shuah@kernel.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kernel-mentees@lists.linuxfoundation.org, luto@kernel.org Cc: Swarup Laxman Kotiaklapudi Subject: [PATCH v2] selftests: capabilities: namespace create varies for root and normal user Date: Sat, 11 Nov 2023 23:08:06 +0530 Message-Id: <20231111173806.16775-1-swarupkotikalapudi@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 This patchset fixes TODO: "If we're already root, we could skip creating the userns." Change namespace creation for root and non-root user differently in create_and_enter_ns() function in this file: tools/testing/selftests/capabilities/test_execve.c Test result with root user: $sudo make TARGETS="capabilities" kselftest ... TAP version 13 1..1 timeout set to 45 selftests: capabilities: test_execve TAP version 13 1..12 [RUN] +++ Tests with uid == 0 +++ [NOTE] Using global UIDs for tests [RUN] Root => ep ... ok 12 Passed Totals: pass:12 fail:0 xfail:0 xpass:0 skip:0 error:0 ================================================== TAP version 13 1..9 [RUN] +++ Tests with uid != 0 +++ [NOTE] Using global UIDs for tests [RUN] Non-root => no caps ... ok 9 Passed Totals: pass:9 fail:0 xfail:0 xpass:0 skip:0 error:0 Test result without root or normal user: $make TARGETS="capabilities" kselftest ... timeout set to 45 selftests: capabilities: test_execve TAP version 13 1..12 [RUN] +++ Tests with uid == 0 +++ [NOTE] Using a user namespace for tests [RUN] Root => ep validate_cap:: Capabilities after execve were correct ok 1 Passed Check cap_ambient manipulation rules ok 2 PR_CAP_AMBIENT_RAISE failed on non-inheritable cap ok 3 PR_CAP_AMBIENT_RAISE failed on non-permitted cap ok 4 PR_CAP_AMBIENT_RAISE worked ok 5 Basic manipulation appears to work [RUN] Root +i => eip validate_cap:: Capabilities after execve were correct ok 6 Passed [RUN] UID 0 +ia => eipa validate_cap:: Capabilities after execve were correct ok 7 Passed ok 8 # SKIP SUID/SGID tests (needs privilege) Planned tests != run tests (12 != 8) Totals: pass:7 fail:0 xfail:0 xpass:0 skip:1 error:0 ================================================== TAP version 13 1..9 [RUN] +++ Tests with uid != 0 +++ [NOTE] Using a user namespace for tests [RUN] Non-root => no caps validate_cap:: Capabilities after execve were correct ok 1 Passed Check cap_ambient manipulation rules ok 2 PR_CAP_AMBIENT_RAISE failed on non-inheritable cap ok 3 PR_CAP_AMBIENT_RAISE failed on non-permitted cap ok 4 PR_CAP_AMBIENT_RAISE worked ok 5 Basic manipulation appears to work [RUN] Non-root +i => i validate_cap:: Capabilities after execve were correct ok 6 Passed [RUN] UID 1 +ia => eipa validate_cap:: Capabilities after execve were correct ok 7 Passed ok 8 # SKIP SUID/SGID tests (needs privilege) Planned tests != run tests (9 != 8) Totals: pass:7 fail:0 xfail:0 xpass:0 skip:1 error:0 Signed-off-by: Swarup Laxman Kotiaklapudi --- Changes in V2: - Change the commit message explaining why this patchset is needed. tools/testing/selftests/capabilities/test_execve.c | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-) diff --git a/tools/testing/selftests/capabilities/test_execve.c b/tools/testing/selftests/capabilities/test_execve.c index df0ef02b4036..8236150d377e 100644 --- a/tools/testing/selftests/capabilities/test_execve.c +++ b/tools/testing/selftests/capabilities/test_execve.c @@ -96,11 +96,7 @@ static bool create_and_enter_ns(uid_t inner_uid) outer_uid = getuid(); outer_gid = getgid(); - /* - * TODO: If we're already root, we could skip creating the userns. - */ - - if (unshare(CLONE_NEWNS) == 0) { + if (outer_uid == 0 && unshare(CLONE_NEWNS) == 0) { ksft_print_msg("[NOTE]\tUsing global UIDs for tests\n"); if (prctl(PR_SET_KEEPCAPS, 1, 0, 0, 0) != 0) ksft_exit_fail_msg("PR_SET_KEEPCAPS - %s\n",