327 lines
10 KiB
C
327 lines
10 KiB
C
/* $NetBSD: t_ptrace_exec_wait.h,v 1.1 2020/05/05 00:23:12 kamil Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 2016, 2017, 2018, 2019, 2020 The NetBSD Foundation, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
|
|
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
|
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
|
|
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
static void
|
|
traceme_vfork_exec(bool masked, bool ignored)
|
|
{
|
|
const int sigval = SIGTRAP;
|
|
pid_t child, wpid;
|
|
#if defined(TWAIT_HAVE_STATUS)
|
|
int status;
|
|
#endif
|
|
struct sigaction sa;
|
|
struct ptrace_siginfo info;
|
|
sigset_t intmask;
|
|
struct kinfo_proc2 kp;
|
|
size_t len = sizeof(kp);
|
|
|
|
int name[6];
|
|
const size_t namelen = __arraycount(name);
|
|
ki_sigset_t kp_sigmask;
|
|
ki_sigset_t kp_sigignore;
|
|
|
|
memset(&info, 0, sizeof(info));
|
|
|
|
DPRINTF("Before forking process PID=%d\n", getpid());
|
|
SYSCALL_REQUIRE((child = vfork()) != -1);
|
|
if (child == 0) {
|
|
DPRINTF("Before calling PT_TRACE_ME from child %d\n", getpid());
|
|
FORKEE_ASSERT(ptrace(PT_TRACE_ME, 0, NULL, 0) != -1);
|
|
|
|
if (masked) {
|
|
sigemptyset(&intmask);
|
|
sigaddset(&intmask, sigval);
|
|
sigprocmask(SIG_BLOCK, &intmask, NULL);
|
|
}
|
|
|
|
if (ignored) {
|
|
memset(&sa, 0, sizeof(sa));
|
|
sa.sa_handler = SIG_IGN;
|
|
sigemptyset(&sa.sa_mask);
|
|
FORKEE_ASSERT(sigaction(sigval, &sa, NULL) != -1);
|
|
}
|
|
|
|
DPRINTF("Before calling execve(2) from child\n");
|
|
execlp("/bin/echo", "/bin/echo", NULL);
|
|
|
|
/* NOTREACHED */
|
|
FORKEE_ASSERTX(0 && "Not reached");
|
|
}
|
|
DPRINTF("Parent process PID=%d, child's PID=%d\n", getpid(), child);
|
|
|
|
DPRINTF("Before calling %s() for the child\n", TWAIT_FNAME);
|
|
TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child);
|
|
|
|
validate_status_stopped(status, sigval);
|
|
|
|
name[0] = CTL_KERN,
|
|
name[1] = KERN_PROC2,
|
|
name[2] = KERN_PROC_PID;
|
|
name[3] = getpid();
|
|
name[4] = sizeof(kp);
|
|
name[5] = 1;
|
|
|
|
ATF_REQUIRE_EQ(sysctl(name, namelen, &kp, &len, NULL, 0), 0);
|
|
|
|
if (masked)
|
|
kp_sigmask = kp.p_sigmask;
|
|
|
|
if (ignored)
|
|
kp_sigignore = kp.p_sigignore;
|
|
|
|
name[3] = getpid();
|
|
|
|
ATF_REQUIRE_EQ(sysctl(name, namelen, &kp, &len, NULL, 0), 0);
|
|
|
|
if (masked) {
|
|
DPRINTF("kp_sigmask="
|
|
"%#02" PRIx32 "%02" PRIx32 "%02" PRIx32 "%02" PRIx32"\n",
|
|
kp_sigmask.__bits[0], kp_sigmask.__bits[1],
|
|
kp_sigmask.__bits[2], kp_sigmask.__bits[3]);
|
|
|
|
DPRINTF("kp.p_sigmask="
|
|
"%#02" PRIx32 "%02" PRIx32 "%02" PRIx32 "%02" PRIx32"\n",
|
|
kp.p_sigmask.__bits[0], kp.p_sigmask.__bits[1],
|
|
kp.p_sigmask.__bits[2], kp.p_sigmask.__bits[3]);
|
|
|
|
ATF_REQUIRE(!memcmp(&kp_sigmask, &kp.p_sigmask,
|
|
sizeof(kp_sigmask)));
|
|
}
|
|
|
|
if (ignored) {
|
|
DPRINTF("kp_sigignore="
|
|
"%#02" PRIx32 "%02" PRIx32 "%02" PRIx32 "%02" PRIx32"\n",
|
|
kp_sigignore.__bits[0], kp_sigignore.__bits[1],
|
|
kp_sigignore.__bits[2], kp_sigignore.__bits[3]);
|
|
|
|
DPRINTF("kp.p_sigignore="
|
|
"%#02" PRIx32 "%02" PRIx32 "%02" PRIx32 "%02" PRIx32"\n",
|
|
kp.p_sigignore.__bits[0], kp.p_sigignore.__bits[1],
|
|
kp.p_sigignore.__bits[2], kp.p_sigignore.__bits[3]);
|
|
|
|
ATF_REQUIRE(!memcmp(&kp_sigignore, &kp.p_sigignore,
|
|
sizeof(kp_sigignore)));
|
|
}
|
|
|
|
DPRINTF("Before calling ptrace(2) with PT_GET_SIGINFO for child\n");
|
|
SYSCALL_REQUIRE(
|
|
ptrace(PT_GET_SIGINFO, child, &info, sizeof(info)) != -1);
|
|
|
|
DPRINTF("Signal traced to lwpid=%d\n", info.psi_lwpid);
|
|
DPRINTF("Signal properties: si_signo=%#x si_code=%#x si_errno=%#x\n",
|
|
info.psi_siginfo.si_signo, info.psi_siginfo.si_code,
|
|
info.psi_siginfo.si_errno);
|
|
|
|
ATF_REQUIRE_EQ(info.psi_siginfo.si_signo, sigval);
|
|
ATF_REQUIRE_EQ(info.psi_siginfo.si_code, TRAP_EXEC);
|
|
|
|
DPRINTF("Before resuming the child process where it left off and "
|
|
"without signal to be sent\n");
|
|
SYSCALL_REQUIRE(ptrace(PT_CONTINUE, child, (void *)1, 0) != -1);
|
|
|
|
DPRINTF("Before calling %s() for the child\n", TWAIT_FNAME);
|
|
TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child);
|
|
|
|
DPRINTF("Before calling %s() for the child\n", TWAIT_FNAME);
|
|
TWAIT_REQUIRE_FAILURE(ECHILD, wpid = TWAIT_GENERIC(child, &status, 0));
|
|
}
|
|
|
|
#define TRACEME_VFORK_EXEC(test, masked, ignored) \
|
|
ATF_TC(test); \
|
|
ATF_TC_HEAD(test, tc) \
|
|
{ \
|
|
atf_tc_set_md_var(tc, "descr", \
|
|
"Verify PT_TRACE_ME followed by exec(3) in a vfork(2)ed " \
|
|
"child%s%s", masked ? " with masked signal" : "", \
|
|
masked ? " with ignored signal" : ""); \
|
|
} \
|
|
\
|
|
ATF_TC_BODY(test, tc) \
|
|
{ \
|
|
\
|
|
traceme_vfork_exec(masked, ignored); \
|
|
}
|
|
|
|
TRACEME_VFORK_EXEC(traceme_vfork_exec, false, false)
|
|
TRACEME_VFORK_EXEC(traceme_vfork_signalmasked_exec, true, false)
|
|
TRACEME_VFORK_EXEC(traceme_vfork_signalignored_exec, false, true)
|
|
|
|
/// ----------------------------------------------------------------------------
|
|
|
|
static void
|
|
traceme_exec(bool masked, bool ignored)
|
|
{
|
|
const int sigval = SIGTRAP;
|
|
pid_t child, wpid;
|
|
#if defined(TWAIT_HAVE_STATUS)
|
|
int status;
|
|
#endif
|
|
struct sigaction sa;
|
|
struct ptrace_siginfo info;
|
|
sigset_t intmask;
|
|
struct kinfo_proc2 kp;
|
|
size_t len = sizeof(kp);
|
|
|
|
int name[6];
|
|
const size_t namelen = __arraycount(name);
|
|
ki_sigset_t kp_sigmask;
|
|
ki_sigset_t kp_sigignore;
|
|
|
|
memset(&info, 0, sizeof(info));
|
|
|
|
DPRINTF("Before forking process PID=%d\n", getpid());
|
|
SYSCALL_REQUIRE((child = fork()) != -1);
|
|
if (child == 0) {
|
|
DPRINTF("Before calling PT_TRACE_ME from child %d\n", getpid());
|
|
FORKEE_ASSERT(ptrace(PT_TRACE_ME, 0, NULL, 0) != -1);
|
|
|
|
if (masked) {
|
|
sigemptyset(&intmask);
|
|
sigaddset(&intmask, sigval);
|
|
sigprocmask(SIG_BLOCK, &intmask, NULL);
|
|
}
|
|
|
|
if (ignored) {
|
|
memset(&sa, 0, sizeof(sa));
|
|
sa.sa_handler = SIG_IGN;
|
|
sigemptyset(&sa.sa_mask);
|
|
FORKEE_ASSERT(sigaction(sigval, &sa, NULL) != -1);
|
|
}
|
|
|
|
DPRINTF("Before calling execve(2) from child\n");
|
|
execlp("/bin/echo", "/bin/echo", NULL);
|
|
|
|
FORKEE_ASSERT(0 && "Not reached");
|
|
}
|
|
DPRINTF("Parent process PID=%d, child's PID=%d\n", getpid(), child);
|
|
|
|
DPRINTF("Before calling %s() for the child\n", TWAIT_FNAME);
|
|
TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child);
|
|
|
|
validate_status_stopped(status, sigval);
|
|
|
|
name[0] = CTL_KERN,
|
|
name[1] = KERN_PROC2,
|
|
name[2] = KERN_PROC_PID;
|
|
name[3] = getpid();
|
|
name[4] = sizeof(kp);
|
|
name[5] = 1;
|
|
|
|
ATF_REQUIRE_EQ(sysctl(name, namelen, &kp, &len, NULL, 0), 0);
|
|
|
|
if (masked)
|
|
kp_sigmask = kp.p_sigmask;
|
|
|
|
if (ignored)
|
|
kp_sigignore = kp.p_sigignore;
|
|
|
|
name[3] = getpid();
|
|
|
|
ATF_REQUIRE_EQ(sysctl(name, namelen, &kp, &len, NULL, 0), 0);
|
|
|
|
if (masked) {
|
|
DPRINTF("kp_sigmask="
|
|
"%#02" PRIx32 "%02" PRIx32 "%02" PRIx32 "%02" PRIx32"\n",
|
|
kp_sigmask.__bits[0], kp_sigmask.__bits[1],
|
|
kp_sigmask.__bits[2], kp_sigmask.__bits[3]);
|
|
|
|
DPRINTF("kp.p_sigmask="
|
|
"%#02" PRIx32 "%02" PRIx32 "%02" PRIx32 "%02" PRIx32"\n",
|
|
kp.p_sigmask.__bits[0], kp.p_sigmask.__bits[1],
|
|
kp.p_sigmask.__bits[2], kp.p_sigmask.__bits[3]);
|
|
|
|
ATF_REQUIRE(!memcmp(&kp_sigmask, &kp.p_sigmask,
|
|
sizeof(kp_sigmask)));
|
|
}
|
|
|
|
if (ignored) {
|
|
DPRINTF("kp_sigignore="
|
|
"%#02" PRIx32 "%02" PRIx32 "%02" PRIx32 "%02" PRIx32"\n",
|
|
kp_sigignore.__bits[0], kp_sigignore.__bits[1],
|
|
kp_sigignore.__bits[2], kp_sigignore.__bits[3]);
|
|
|
|
DPRINTF("kp.p_sigignore="
|
|
"%#02" PRIx32 "%02" PRIx32 "%02" PRIx32 "%02" PRIx32"\n",
|
|
kp.p_sigignore.__bits[0], kp.p_sigignore.__bits[1],
|
|
kp.p_sigignore.__bits[2], kp.p_sigignore.__bits[3]);
|
|
|
|
ATF_REQUIRE(!memcmp(&kp_sigignore, &kp.p_sigignore,
|
|
sizeof(kp_sigignore)));
|
|
}
|
|
|
|
DPRINTF("Before calling ptrace(2) with PT_GET_SIGINFO for child\n");
|
|
SYSCALL_REQUIRE(
|
|
ptrace(PT_GET_SIGINFO, child, &info, sizeof(info)) != -1);
|
|
|
|
DPRINTF("Signal traced to lwpid=%d\n", info.psi_lwpid);
|
|
DPRINTF("Signal properties: si_signo=%#x si_code=%#x si_errno=%#x\n",
|
|
info.psi_siginfo.si_signo, info.psi_siginfo.si_code,
|
|
info.psi_siginfo.si_errno);
|
|
|
|
ATF_REQUIRE_EQ(info.psi_siginfo.si_signo, sigval);
|
|
ATF_REQUIRE_EQ(info.psi_siginfo.si_code, TRAP_EXEC);
|
|
|
|
DPRINTF("Before resuming the child process where it left off and "
|
|
"without signal to be sent\n");
|
|
SYSCALL_REQUIRE(ptrace(PT_CONTINUE, child, (void *)1, 0) != -1);
|
|
|
|
DPRINTF("Before calling %s() for the child\n", TWAIT_FNAME);
|
|
TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child);
|
|
|
|
DPRINTF("Before calling %s() for the child\n", TWAIT_FNAME);
|
|
TWAIT_REQUIRE_FAILURE(ECHILD, wpid = TWAIT_GENERIC(child, &status, 0));
|
|
}
|
|
|
|
#define TRACEME_EXEC(test, masked, ignored) \
|
|
ATF_TC(test); \
|
|
ATF_TC_HEAD(test, tc) \
|
|
{ \
|
|
atf_tc_set_md_var(tc, "descr", \
|
|
"Detect SIGTRAP TRAP_EXEC from " \
|
|
"child%s%s", masked ? " with masked signal" : "", \
|
|
masked ? " with ignored signal" : ""); \
|
|
} \
|
|
\
|
|
ATF_TC_BODY(test, tc) \
|
|
{ \
|
|
\
|
|
traceme_exec(masked, ignored); \
|
|
}
|
|
|
|
TRACEME_EXEC(traceme_exec, false, false)
|
|
TRACEME_EXEC(traceme_signalmasked_exec, true, false)
|
|
TRACEME_EXEC(traceme_signalignored_exec, false, true)
|
|
|
|
#define ATF_TP_ADD_TCS_PTRACE_WAIT_EXEC() \
|
|
ATF_TP_ADD_TC(tp, traceme_vfork_exec); \
|
|
ATF_TP_ADD_TC(tp, traceme_vfork_signalmasked_exec); \
|
|
ATF_TP_ADD_TC(tp, traceme_vfork_signalignored_exec); \
|
|
ATF_TP_ADD_TC(tp, traceme_exec); \
|
|
ATF_TP_ADD_TC(tp, traceme_signalmasked_exec); \
|
|
ATF_TP_ADD_TC(tp, traceme_signalignored_exec);
|