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From: "Mickaël Salaün" <mic@digikod.net>
To: linux-security-module@vger.kernel.org
Cc: "Mickaël Salaün" <mic@digikod.net>,
	"Andreas Gruenbacher" <agruenba@redhat.com>,
	"Andy Lutomirski" <luto@amacapital.net>,
	"Andy Lutomirski" <luto@kernel.org>,
	"Arnd Bergmann" <arnd@arndb.de>,
	"Casey Schaufler" <casey@schaufler-ca.com>,
	"Daniel Borkmann" <daniel@iogearbox.net>,
	"David Drysdale" <drysdale@google.com>,
	"Eric Paris" <eparis@redhat.com>,
	"James Morris" <james.l.morris@oracle.com>,
	"Jeff Dike" <jdike@addtoit.com>, "Julien Tinnes" <jln@google.com>,
	"Kees Cook" <keescook@chromium.org>,
	"Michael Kerrisk" <mtk@man7.org>,
	"Paul Moore" <pmoore@redhat.com>,
	"Richard Weinberger" <richard@nod.at>,
	"Serge E . Hallyn" <serge@hallyn.com>,
	"Stephen Smalley" <sds@tycho.nsa.gov>,
	"Tetsuo Handa" <penguin-kernel@I-love.SAKURA.ne.jp>,
	"Will Drewry" <wad@chromium.org>,
	linux-api@vger.kernel.org, kernel-hardening@lists.openwall.com
Subject: [kernel-hardening] [RFC v1 10/17] selftest/seccomp: Add field_is_valid_syscall test
Date: Thu, 24 Mar 2016 03:53:55 +0100	[thread overview]
Message-ID: <1458788042-26173-2-git-send-email-mic@digikod.net> (raw)
In-Reply-To: <1458788042-26173-1-git-send-email-mic@digikod.net>

Test the new seccomp_data field: is_valid_syscall.

Signed-off-by: Mickaël Salaün <mic@digikod.net>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Paul Moore <pmoore@redhat.com>
Cc: Will Drewry <wad@chromium.org>
---
 tools/testing/selftests/seccomp/seccomp_bpf.c | 31 +++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/tools/testing/selftests/seccomp/seccomp_bpf.c b/tools/testing/selftests/seccomp/seccomp_bpf.c
index edaa405111aa..8b1a6bfc64a1 100644
--- a/tools/testing/selftests/seccomp/seccomp_bpf.c
+++ b/tools/testing/selftests/seccomp/seccomp_bpf.c
@@ -2208,6 +2208,37 @@ TEST(syscall_restart)
 		_metadata->passed = 0;
 }
 
+#ifdef SECCOMP_DATA_ARGEVAL_PRESENT
+TEST(field_is_valid_syscall)
+{
+	struct sock_filter filter[] = {
+		BPF_STMT(BPF_LD|BPF_W|BPF_ABS,
+				offsetof(struct seccomp_data, nr)),
+		BPF_JUMP(BPF_JMP|BPF_JEQ|BPF_K, __NR_getpid, 1, 0),
+		BPF_STMT(BPF_RET|BPF_K, SECCOMP_RET_ALLOW),
+		BPF_STMT(BPF_LD|BPF_W|BPF_ABS,
+				offsetof(struct seccomp_data, is_valid_syscall)),
+		BPF_JUMP(BPF_JMP|BPF_JEQ|BPF_K, 1, 1, 0),
+		BPF_STMT(BPF_RET|BPF_K, SECCOMP_RET_ERRNO | EINVAL),
+		BPF_STMT(BPF_RET|BPF_K, SECCOMP_RET_ALLOW),
+	};
+	struct sock_fprog prog = {
+		.len = (unsigned short)ARRAY_SIZE(filter),
+		.filter = filter,
+	};
+
+	ASSERT_EQ(0, prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0)) {
+		TH_LOG("Kernel does not support PR_SET_NO_NEW_PRIVS!");
+	}
+	EXPECT_EQ(0, seccomp(SECCOMP_SET_MODE_FILTER, 0, &prog)) {
+		TH_LOG("Failed to install filter!");
+	}
+
+	EXPECT_EQ(-1, syscall(__NR_getpid));
+	EXPECT_EQ(EINVAL, errno);
+}
+#endif /* SECCOMP_DATA_ARGEVAL_PRESENT */
+
 /*
  * TODO:
  * - add microbenchmarks
-- 
2.8.0.rc3

  reply	other threads:[~2016-03-24  2:53 UTC|newest]

Thread overview: 39+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-03-24  1:46 [kernel-hardening] [RFC v1 00/17] seccomp-object: From attack surface reduction to sandboxing Mickaël Salaün
2016-03-24  1:46 ` [kernel-hardening] [RFC v1 01/17] um: Export the sys_call_table Mickaël Salaün
2016-03-24  1:46 ` [kernel-hardening] [RFC v1 02/17] seccomp: Fix typo Mickaël Salaün
2016-03-24  1:46 ` [kernel-hardening] [RFC v1 03/17] selftest/seccomp: Fix the flag name SECCOMP_FILTER_FLAG_TSYNC Mickaël Salaün
2016-03-24  4:35   ` [kernel-hardening] " Kees Cook
2016-03-29 15:35     ` Shuah Khan
2016-03-29 18:46       ` [kernel-hardening] [PATCH 1/2] " Mickaël Salaün
2016-03-29 19:06         ` [kernel-hardening] " Shuah Khan
2016-03-24  1:46 ` [kernel-hardening] [RFC v1 04/17] selftest/seccomp: Fix the seccomp(2) signature Mickaël Salaün
2016-03-24  4:36   ` [kernel-hardening] " Kees Cook
2016-03-29 15:38     ` Shuah Khan
2016-03-29 18:51       ` [kernel-hardening] [PATCH 2/2] " Mickaël Salaün
2016-03-29 19:07         ` [kernel-hardening] " Shuah Khan
2016-03-24  1:46 ` [kernel-hardening] [RFC v1 05/17] security/seccomp: Add LSM and create arrays of syscall metadata Mickaël Salaün
2016-03-24 15:47   ` [kernel-hardening] " Casey Schaufler
2016-03-24 16:01   ` Casey Schaufler
2016-03-24 21:31     ` Mickaël Salaün
2016-03-24  1:46 ` [kernel-hardening] [RFC v1 06/17] seccomp: Add the SECCOMP_ADD_CHECKER_GROUP command Mickaël Salaün
2016-03-24  1:46 ` [kernel-hardening] [RFC v1 07/17] seccomp: Add seccomp object checker evaluation Mickaël Salaün
2016-03-24  1:46 ` [kernel-hardening] [RFC v1 08/17] selftest/seccomp: Remove unknown_ret_is_kill_above_allow test Mickaël Salaün
2016-03-24  2:53 ` [kernel-hardening] [RFC v1 09/17] selftest/seccomp: Extend seccomp_data until matches[6] Mickaël Salaün
2016-03-24  2:53   ` Mickaël Salaün [this message]
2016-03-24  2:53   ` [kernel-hardening] [RFC v1 11/17] selftest/seccomp: Add argeval_open_whitelist test Mickaël Salaün
2016-03-24  2:53   ` [kernel-hardening] [RFC v1 12/17] audit,seccomp: Extend audit with seccomp state Mickaël Salaün
2016-03-24  2:53   ` [kernel-hardening] [RFC v1 13/17] selftest/seccomp: Rename TRACE_poke to TRACE_poke_sys_read Mickaël Salaün
2016-03-24  2:53   ` [kernel-hardening] [RFC v1 14/17] selftest/seccomp: Make tracer_poke() more generic Mickaël Salaün
2016-03-24  2:54   ` [kernel-hardening] [RFC v1 15/17] selftest/seccomp: Add argeval_toctou_argument test Mickaël Salaün
2016-03-24  2:54   ` [kernel-hardening] [RFC v1 16/17] security/seccomp: Protect against filesystem TOCTOU Mickaël Salaün
2016-03-24  2:54   ` [kernel-hardening] [RFC v1 17/17] selftest/seccomp: Add argeval_toctou_filesystem test Mickaël Salaün
2016-03-24 16:24 ` [kernel-hardening] Re: [RFC v1 00/17] seccomp-object: From attack surface reduction to sandboxing Kees Cook
2016-03-27  5:03   ` Loganaden Velvindron
2016-04-20 18:21 ` Mickaël Salaün
2016-04-26 22:46   ` Kees Cook
2016-04-28  2:36 ` Kees Cook
2016-04-28 23:45   ` Mickaël Salaün
2016-05-21 12:58     ` Mickaël Salaün
2016-05-02 22:19   ` James Morris
2016-05-21 15:19   ` Daniel Borkmann
2016-05-22 21:30     ` Mickaël Salaün

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