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Fri, 28 Mar 2025 14:25:42 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id mBSlK2ax5mfndgAAD6G6ig (envelope-from ); Fri, 28 Mar 2025 14:25:42 +0000 From: Andrea Cervesato Date: Fri, 28 Mar 2025 15:24:56 +0100 MIME-Version: 1.0 Message-Id: <20250328-landlock_unix_socket-v3-4-e2643f65b25e@suse.com> References: <20250328-landlock_unix_socket-v3-0-e2643f65b25e@suse.com> In-Reply-To: <20250328-landlock_unix_socket-v3-0-e2643f65b25e@suse.com> To: ltp@lists.linux.it X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1743171941; l=4142; i=andrea.cervesato@suse.com; s=20240812; h=from:subject:message-id; bh=JKjoLBz5m6+jhGN1xoHvt2eQyGvIOTAq/UaEOS06fL4=; b=js4oKx92L/H2ObOATrpjOzbbvnwhtfa65FbYegDKTRX2gQq7iG01oGFxlDOfSGe/Nacei06lv ME5xffzU/5dBQYsbRvquy7pbjXChd6AUDbRZ0lxZ3g3RUbN4G0prJ7O X-Developer-Key: i=andrea.cervesato@suse.com; a=ed25519; pk=RG/nLJ5snb1tLKGwSORQXBJ5XA4juT0WF2Pc/lq9meo= X-Spam-Level: X-Spamd-Result: default: False [-4.30 / 50.00]; BAYES_HAM(-3.00)[100.00%]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; RCVD_VIA_SMTP_AUTH(0.00)[]; MIME_TRACE(0.00)[0:+]; ARC_NA(0.00)[]; TO_DN_SOME(0.00)[]; RCVD_TLS_ALL(0.00)[]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; FUZZY_BLOCKED(0.00)[rspamd.com]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[3]; FROM_EQ_ENVFROM(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; DBL_BLOCKED_OPENRESOLVER(0.00)[imap1.dmz-prg2.suse.org:helo, suse.com:email, suse.com:mid] X-Spam-Score: -4.30 X-Spam-Status: No, score=0.1 required=7.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,DKIM_VALID_EF,DMARC_PASS,SPF_HELO_NONE,SPF_PASS shortcircuit=no autolearn=disabled version=4.0.0 X-Spam-Checker-Version: SpamAssassin 4.0.0 (2022-12-13) on in-2.smtp.seeweb.it X-Virus-Scanned: clamav-milter 1.0.3 at in-2.smtp.seeweb.it X-Virus-Status: Clean Subject: [LTP] [PATCH v3 4/4] landlock: add landlock10 test X-BeenThere: ltp@lists.linux.it X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux Test Project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: ltp-bounces+incoming=patchwork.ozlabs.org@lists.linux.it Sender: "ltp" From: Andrea Cervesato Verify that landlock's LANDLOCK_SCOPE_SIGNAL rule rejects any signal coming from a process on a different domain, but accept signals from processes in the same domain. Reviewed-by: Cyril Hrubis Signed-off-by: Andrea Cervesato --- runtest/syscalls | 1 + testcases/kernel/syscalls/landlock/.gitignore | 1 + testcases/kernel/syscalls/landlock/landlock10.c | 108 ++++++++++++++++++++++++ 3 files changed, 110 insertions(+) diff --git a/runtest/syscalls b/runtest/syscalls index e3ed1738922a954493b56240be12cc40de691b6e..de7aacbba4a082df8d3d1c5228b6d5b6e7370c78 100644 --- a/runtest/syscalls +++ b/runtest/syscalls @@ -711,6 +711,7 @@ landlock06 landlock06 landlock07 landlock07 landlock08 landlock08 landlock09 landlock09 +landlock10 landlock10 lchown01 lchown01 lchown01_16 lchown01_16 diff --git a/testcases/kernel/syscalls/landlock/.gitignore b/testcases/kernel/syscalls/landlock/.gitignore index cda8d871e051ec88abba4634a2bcda4b10470d9f..8c88803df4580605da800c414ada62994b35d268 100644 --- a/testcases/kernel/syscalls/landlock/.gitignore +++ b/testcases/kernel/syscalls/landlock/.gitignore @@ -8,3 +8,4 @@ landlock06 landlock07 landlock08 landlock09 +landlock10 diff --git a/testcases/kernel/syscalls/landlock/landlock10.c b/testcases/kernel/syscalls/landlock/landlock10.c new file mode 100644 index 0000000000000000000000000000000000000000..a29e3bca82fe813e9e2dbec5f1f0f42db9ebf367 --- /dev/null +++ b/testcases/kernel/syscalls/landlock/landlock10.c @@ -0,0 +1,108 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (C) 2025 SUSE LLC Andrea Cervesato + */ + +/*\ + * Verify that landlock's LANDLOCK_SCOPE_SIGNAL rule rejects any signal coming + * from a process on a different domain, but accept signals from processes in + * the same domain. + */ + +#include "tst_test.h" +#include "landlock_common.h" + +static struct tst_landlock_ruleset_attr_abi6 *ruleset_attr; + +enum { + DOMAIN_PAUSED = 0, + DOMAIN_KILLER, + DOMAIN_BOTH, +}; + +static void scoped_sandbox(const char *from) +{ + tst_res(TINFO, "Enforcing rule LANDLOCK_SCOPE_SIGNAL for %s process", from); + + ruleset_attr->scoped = LANDLOCK_SCOPE_SIGNAL; + apply_landlock_scoped_layer(ruleset_attr, sizeof(*ruleset_attr)); +} + +static void run(void) +{ + /* isolate test inside a process so we won't stack too many + * layers (-E2BIG) when there are multiple test's iterations + */ + if (SAFE_FORK()) + return; + + if (tst_variant == DOMAIN_BOTH) + scoped_sandbox("paused and killer"); + + pid_t paused_pid; + pid_t killer_pid; + + paused_pid = SAFE_FORK(); + if (!paused_pid) { + if (tst_variant == DOMAIN_PAUSED) + scoped_sandbox("paused"); + + TST_CHECKPOINT_WAKE(0); + pause(); + exit(0); + } + + TST_CHECKPOINT_WAIT(0); + TST_PROCESS_STATE_WAIT(paused_pid, 'S', 10000); + + killer_pid = SAFE_FORK(); + if (!killer_pid) { + if (tst_variant == DOMAIN_KILLER) + scoped_sandbox("killer"); + + TST_CHECKPOINT_WAKE(0); + + if (tst_variant == DOMAIN_KILLER) + TST_EXP_FAIL(kill(paused_pid, SIGKILL), EPERM); + else + TST_EXP_PASS(kill(paused_pid, SIGKILL)); + + exit(0); + } + + TST_CHECKPOINT_WAIT(0); + SAFE_WAITPID(killer_pid, NULL, 0); + + if (kill(paused_pid, SIGKILL) == -1) { + if (errno != ESRCH) + tst_brk(TBROK | TERRNO, "kill(%u, SIGKILL) error", paused_pid); + } + + SAFE_WAITPID(paused_pid, NULL, 0); +} + +static void setup(void) +{ + int abi; + + abi = verify_landlock_is_enabled(); + if (abi < 6) + tst_brk(TCONF, "LANDLOCK_SCOPE_SIGNAL is unsupported on ABI < 6"); +} + +static struct tst_test test = { + .test_all = run, + .setup = setup, + .needs_root = 1, + .forks_child = 1, + .needs_checkpoints = 1, + .test_variants = 3, + .bufs = (struct tst_buffers []) { + {&ruleset_attr, .size = sizeof(struct tst_landlock_ruleset_attr_abi6)}, + {}, + }, + .caps = (struct tst_cap []) { + TST_CAP(TST_CAP_REQ, CAP_SYS_ADMIN), + {} + }, +};