[src/trunk]: src/tests/kernel Add new tests attach_pid0 and attach_pid1 to t_...

[kamil <kamil%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/895365decfd9
branches:  trunk
changeset: 818908:895365decfd9
user:      kamil <kamil%NetBSD.org@localhost>
date:      Sun Nov 06 16:24:16 2016 +0000

description:
Add new tests attach_pid0 and attach_pid1 to t_ptrace

attach_pid0 asserts that it is not valid to attach PID 0 as it is a special
kernel process.

assert_pid1 asserts that non-root user cannot attach to PID 1 as it is the
/dev/init process. This tests is skipped if run as root.

Sponsored by <The NetBSD Foundation>.

diffstat:

 tests/kernel/t_ptrace.c |  37 +++++++++++++++++++++++++++++++++++--
 1 files changed, 35 insertions(+), 2 deletions(-)

diffs (65 lines):

diff -r 5441499234b9 -r 895365decfd9 tests/kernel/t_ptrace.c
--- a/tests/kernel/t_ptrace.c   Sun Nov 06 15:03:30 2016 +0000
+++ b/tests/kernel/t_ptrace.c   Sun Nov 06 16:24:16 2016 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: t_ptrace.c,v 1.10 2016/11/05 15:52:35 kamil Exp $      */
+/*     $NetBSD: t_ptrace.c,v 1.11 2016/11/06 16:24:16 kamil Exp $      */
 
 /*-
  * Copyright (c) 2016 The NetBSD Foundation, Inc.
@@ -27,7 +27,7 @@
  */
 
 #include <sys/cdefs.h>
-__RCSID("$NetBSD: t_ptrace.c,v 1.10 2016/11/05 15:52:35 kamil Exp $");
+__RCSID("$NetBSD: t_ptrace.c,v 1.11 2016/11/06 16:24:16 kamil Exp $");
 
 #include <sys/param.h>
 #include <sys/types.h>
@@ -622,6 +622,37 @@
        ATF_REQUIRE(close(fds_totracer[1]) == 0);
 }
 
+ATF_TC(attach_pid0);
+ATF_TC_HEAD(attach_pid0, tc)
+{
+       atf_tc_set_md_var(tc, "descr",
+           "Assert that a debugger cannot attach to PID 0");
+}
+
+ATF_TC_BODY(attach_pid0, tc)
+{
+       errno = 0;
+       ATF_REQUIRE(ptrace(PT_ATTACH, 0, NULL, 0) == -1);
+       ATF_REQUIRE(errno == EPERM);
+}
+
+ATF_TC(attach_pid1);
+ATF_TC_HEAD(attach_pid1, tc)
+{
+       atf_tc_set_md_var(tc, "descr",
+           "Assert that a debugger cannot attach to PID 1 (as non-root)");
+}
+
+ATF_TC_BODY(attach_pid1, tc)
+{
+       if (getuid() == 0)
+               atf_tc_skip("Test must be run as non-root");
+
+       errno = 0;
+       ATF_REQUIRE(ptrace(PT_ATTACH, 1, NULL, 0) == -1);
+       ATF_REQUIRE(errno == EPERM);
+}
+
 ATF_TP_ADD_TCS(tp)
 {
        ATF_TP_ADD_TC(tp, traceme1);
@@ -629,6 +660,8 @@
        ATF_TP_ADD_TC(tp, traceme3);
        ATF_TP_ADD_TC(tp, traceme4);
        ATF_TP_ADD_TC(tp, attach1);
+       ATF_TP_ADD_TC(tp, attach_pid0);
+       ATF_TP_ADD_TC(tp, attach_pid1);
 
        return atf_no_error();
 }