blob: 3810bd632be6e4b7639083a5b95e514c4c9966b0 [file] [log] [blame]
/*
* Check decoding of ptrace syscall.
*
* Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
* 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
#include "tests.h"
#include <sys/syscall.h>
#ifdef __NR_rt_sigprocmask
# include <errno.h>
# include <signal.h>
# include <stdio.h>
# include <string.h>
# include <sys/wait.h>
# include <unistd.h>
# include "ptrace.h"
# include <linux/audit.h>
static long
do_ptrace(unsigned long request, unsigned long pid,
unsigned long addr, unsigned long data)
{
return syscall(__NR_ptrace, request, pid, addr, data);
}
static void
test_peeksiginfo(unsigned long pid, const unsigned long bad_request)
{
long rc = do_ptrace(PTRACE_PEEKSIGINFO, pid, 0, bad_request);
printf("ptrace(PTRACE_PEEKSIGINFO, %u, NULL, %#lx)"
" = %ld %s (%m)\n", (unsigned) pid, bad_request, rc, errno2name());
struct {
unsigned long long off;
unsigned int flags, nr;
} *const psi = tail_alloc(sizeof(*psi));
(void) tail_alloc(1);
psi->off = 0xdeadbeeffacefeed;
psi->flags = 1;
psi->nr = 42;
rc = do_ptrace(PTRACE_PEEKSIGINFO,
pid, (unsigned long) psi, bad_request);
printf("ptrace(PTRACE_PEEKSIGINFO, %u, {off=%llu"
", flags=PTRACE_PEEKSIGINFO_SHARED, nr=%u}, %#lx)"
" = %ld %s (%m)\n",
(unsigned) pid, psi->off, psi->nr, bad_request, rc, errno2name());
pid = fork();
if (pid < 0)
perror_msg_and_fail("fork");
if (!pid) {
sigset_t mask;
sigemptyset(&mask);
sigaddset(&mask, SIGUSR1);
sigaddset(&mask, SIGUSR2);
sigaddset(&mask, SIGALRM);
if (sigprocmask(SIG_BLOCK, &mask, NULL))
perror_msg_and_fail("sigprocmask");
raise(SIGUSR1);
raise(SIGUSR2);
raise(SIGALRM);
if (do_ptrace(PTRACE_TRACEME, 0, 0, 0))
perror_msg_and_fail("child: PTRACE_TRACEME");
raise(SIGSTOP);
_exit(0);
}
const unsigned int nsigs = 4;
const uid_t uid = geteuid();
siginfo_t *sigs = tail_alloc(sizeof(*sigs) * nsigs);
(void) tail_alloc(1);
psi->off = 0;
psi->flags = 0;
psi->nr = nsigs;
for (;;) {
int status, tracee, saved;
errno = 0;
tracee = wait(&status);
if (tracee <= 0) {
if (errno == EINTR)
continue;
saved = errno;
kill (pid, SIGKILL);
errno = saved;
perror_msg_and_fail("wait");
}
if (WIFEXITED(status)) {
if (WEXITSTATUS(status) == 0)
break;
error_msg_and_fail("unexpected exit status %u",
WEXITSTATUS(status));
}
if (WIFSIGNALED(status))
error_msg_and_fail("unexpected signal %u",
WTERMSIG(status));
if (!WIFSTOPPED(status) || WSTOPSIG(status) != SIGSTOP) {
kill(pid, SIGKILL);
error_msg_and_fail("unexpected wait status %x",
status);
}
rc = do_ptrace(PTRACE_PEEKSIGINFO, pid,
(unsigned long) psi, (unsigned long) sigs);
if (rc < 0) {
printf("ptrace(PTRACE_PEEKSIGINFO, %u, {off=%llu"
", flags=0, nr=%u}, %p) = %ld %s (%m)\n",
(unsigned) pid, psi->off, psi->nr, sigs,
rc, errno2name());
} else {
printf("ptrace(PTRACE_PEEKSIGINFO, %u, {off=%llu"
", flags=0, nr=%u}"
", [{si_signo=SIGUSR1, si_code=SI_TKILL"
", si_pid=%u, si_uid=%u}"
", {si_signo=SIGUSR2, si_code=SI_TKILL"
", si_pid=%u, si_uid=%u}"
", {si_signo=SIGALRM, si_code=SI_TKILL"
", si_pid=%u, si_uid=%u}"
"]) = %ld\n",
(unsigned) pid, psi->off, psi->nr,
(unsigned) pid, (unsigned) uid,
(unsigned) pid, (unsigned) uid,
(unsigned) pid, (unsigned) uid,
rc);
}
if (do_ptrace(PTRACE_CONT, pid, 0, 0)) {
saved = errno;
kill (pid, SIGKILL);
errno = saved;
perror_msg_and_fail("ptrace");
}
printf("ptrace(PTRACE_CONT, %ld, NULL, SIG_0) = 0\n", pid);
}
}
int
main(void)
{
const unsigned long bad_request =
(unsigned long) 0xdeadbeeffffffeed;
const unsigned long bad_data =
(unsigned long) 0xdeadcafefffff00d;
const unsigned long pid =
(unsigned long) 0xdefaced00000000 | (unsigned) getpid();
unsigned int sigset_size;
for (sigset_size = 1024 / 8; sigset_size; sigset_size >>= 1) {
if (!syscall(__NR_rt_sigprocmask,
SIG_SETMASK, NULL, NULL, sigset_size))
break;
}
if (!sigset_size)
perror_msg_and_fail("rt_sigprocmask");
(void) tail_alloc(1);
void *const k_set = tail_alloc(sigset_size);
siginfo_t *const sip = tail_alloc(sizeof(*sip));
(void) tail_alloc(1);
long rc = do_ptrace(bad_request, pid, 0, 0);
printf("ptrace(%#lx /* PTRACE_??? */, %u, NULL, NULL) = %ld %s (%m)\n",
bad_request, (unsigned) pid, rc, errno2name());
rc = do_ptrace(PTRACE_PEEKDATA, pid, bad_request, bad_data);
# ifdef IA64
printf("ptrace(PTRACE_PEEKDATA, %u, %#lx)"
" = %ld %s (%m)\n",
(unsigned) pid, bad_request, rc, errno2name());
# else
printf("ptrace(PTRACE_PEEKDATA, %u, %#lx, %#lx)"
" = %ld %s (%m)\n",
(unsigned) pid, bad_request, bad_data, rc, errno2name());
#endif
rc = do_ptrace(PTRACE_PEEKTEXT, pid, bad_request, bad_data);
# ifdef IA64
printf("ptrace(PTRACE_PEEKTEXT, %u, %#lx)"
" = %ld %s (%m)\n",
(unsigned) pid, bad_request, rc, errno2name());
# else
printf("ptrace(PTRACE_PEEKTEXT, %u, %#lx, %#lx)"
" = %ld %s (%m)\n",
(unsigned) pid, bad_request, bad_data, rc, errno2name());
#endif
rc = do_ptrace(PTRACE_PEEKUSER, pid, bad_request, bad_data);
# ifdef IA64
printf("ptrace(PTRACE_PEEKUSER, %u, %#lx)"
" = %ld %s (%m)\n",
(unsigned) pid, bad_request, rc, errno2name());
# else
printf("ptrace(PTRACE_PEEKUSER, %u, %#lx, %#lx)"
" = %ld %s (%m)\n",
(unsigned) pid, bad_request, bad_data, rc, errno2name());
#endif
rc = do_ptrace(PTRACE_POKEUSER, pid, bad_request, bad_data);
printf("ptrace(PTRACE_POKEUSER, %u, %#lx, %#lx)"
" = %ld %s (%m)\n",
(unsigned) pid, bad_request, bad_data, rc, errno2name());
rc = do_ptrace(PTRACE_ATTACH, pid, 0, 0);
printf("ptrace(PTRACE_ATTACH, %u) = %ld %s (%m)\n",
(unsigned) pid, rc, errno2name());
rc = do_ptrace(PTRACE_INTERRUPT, pid, 0, 0);
printf("ptrace(PTRACE_INTERRUPT, %u) = %ld %s (%m)\n",
(unsigned) pid, rc, errno2name());
rc = do_ptrace(PTRACE_KILL, pid, 0, 0);
printf("ptrace(PTRACE_KILL, %u) = %ld %s (%m)\n",
(unsigned) pid, rc, errno2name());
rc = do_ptrace(PTRACE_LISTEN, pid, 0, 0);
printf("ptrace(PTRACE_LISTEN, %u) = %ld %s (%m)\n",
(unsigned) pid, rc, errno2name());
sigset_t libc_set;
sigemptyset(&libc_set);
sigaddset(&libc_set, SIGUSR1);
memcpy(k_set, &libc_set, sigset_size);
rc = do_ptrace(PTRACE_SETSIGMASK,
pid, sigset_size, (unsigned long) k_set);
printf("ptrace(PTRACE_SETSIGMASK, %u, %u, [USR1])"
" = %ld %s (%m)\n",
(unsigned) pid, sigset_size, rc, errno2name());
rc = do_ptrace(PTRACE_GETSIGMASK,
pid, sigset_size, (unsigned long) k_set);
printf("ptrace(PTRACE_GETSIGMASK, %u, %u, %p)"
" = %ld %s (%m)\n",
(unsigned) pid, sigset_size, k_set, rc, errno2name());
rc = do_ptrace(PTRACE_SECCOMP_GET_FILTER, pid, 42, 0);
printf("ptrace(PTRACE_SECCOMP_GET_FILTER, %u, 42, NULL)"
" = %ld %s (%m)\n", (unsigned) pid, rc, errno2name());
rc = do_ptrace(PTRACE_GETEVENTMSG, pid, bad_request, bad_data);
printf("ptrace(PTRACE_GETEVENTMSG, %u, %#lx, %#lx)"
" = %ld %s (%m)\n",
(unsigned) pid, bad_request, bad_data, rc, errno2name());
memset(sip, -1, sizeof(*sip));
sip->si_signo = SIGIO;
sip->si_code = 1;
sip->si_errno = ENOENT;
sip->si_band = -2;
rc = do_ptrace(PTRACE_SETSIGINFO,
pid, bad_request, (unsigned long) sip);
printf("ptrace(PTRACE_SETSIGINFO, %u, %#lx, {si_signo=SIGIO"
", si_code=POLL_IN, si_errno=ENOENT, si_band=-2})"
" = %ld %s (%m)\n",
(unsigned) pid, bad_request, rc, errno2name());
memset(sip, -1, sizeof(*sip));
sip->si_signo = SIGTRAP;
sip->si_code = 1;
sip->si_errno = ENOENT;
sip->si_pid = 2;
sip->si_uid = 3;
sip->si_ptr = (void *) bad_request;
rc = do_ptrace(PTRACE_SETSIGINFO,
pid, bad_request, (unsigned long) sip);
printf("ptrace(PTRACE_SETSIGINFO, %u, %#lx, {si_signo=SIGTRAP"
", si_code=TRAP_BRKPT, si_errno=ENOENT, si_pid=2, si_uid=3"
", si_value={int=%d, ptr=%p}}) = %ld %s (%m)\n",
(unsigned) pid, bad_request, sip->si_int, sip->si_ptr, rc, errno2name());
memset(sip, -1, sizeof(*sip));
sip->si_signo = SIGILL;
sip->si_code = 1;
sip->si_errno = ENOENT;
sip->si_addr = (void *) (unsigned long) 0xfacefeeddeadbeef;
rc = do_ptrace(PTRACE_SETSIGINFO,
pid, bad_request, (unsigned long) sip);
printf("ptrace(PTRACE_SETSIGINFO, %u, %#lx, {si_signo=SIGILL"
", si_code=ILL_ILLOPC, si_errno=ENOENT, si_addr=%p})"
" = %ld %s (%m)\n",
(unsigned) pid, bad_request, sip->si_addr, rc, errno2name());
memset(sip, -1, sizeof(*sip));
sip->si_signo = SIGFPE;
sip->si_code = 1;
sip->si_errno = ENOENT;
sip->si_addr = (void *) (unsigned long) 0xfacefeeddeadbeef;
rc = do_ptrace(PTRACE_SETSIGINFO,
pid, bad_request, (unsigned long) sip);
printf("ptrace(PTRACE_SETSIGINFO, %u, %#lx, {si_signo=SIGFPE"
", si_code=FPE_INTDIV, si_errno=ENOENT, si_addr=%p})"
" = %ld %s (%m)\n",
(unsigned) pid, bad_request, sip->si_addr, rc, errno2name());
memset(sip, -1, sizeof(*sip));
sip->si_signo = SIGBUS;
sip->si_code = 1;
sip->si_errno = -2;
sip->si_addr = (void *) (unsigned long) 0xfacefeeddeadbeef;
rc = do_ptrace(PTRACE_SETSIGINFO,
pid, bad_request, (unsigned long) sip);
printf("ptrace(PTRACE_SETSIGINFO, %u, %#lx, {si_signo=SIGBUS"
", si_code=BUS_ADRALN, si_errno=%d, si_addr=%p})"
" = %ld %s (%m)\n",
(unsigned) pid, bad_request, sip->si_errno, sip->si_addr,
rc, errno2name());
memset(sip, -1, sizeof(*sip));
sip->si_signo = SIGPROF;
sip->si_code = 0xbadc0ded;
sip->si_errno = -2;
sip->si_pid = 0;
sip->si_uid = 3;
sip->si_ptr = 0;
rc = do_ptrace(PTRACE_SETSIGINFO,
pid, bad_request, (unsigned long) sip);
printf("ptrace(PTRACE_SETSIGINFO, %u, %#lx, {si_signo=SIGPROF"
", si_code=%#x, si_errno=%d, si_pid=0, si_uid=3})"
" = %ld %s (%m)\n",
(unsigned) pid, bad_request, sip->si_code, sip->si_errno,
rc, errno2name());
#ifdef HAVE_SIGINFO_T_SI_SYSCALL
memset(sip, -1, sizeof(*sip));
sip->si_signo = SIGSYS;
sip->si_code = 1;
sip->si_errno = ENOENT;
sip->si_call_addr = (void *) (unsigned long) 0xfacefeeddeadbeef;
sip->si_syscall = -1U;
sip->si_arch = AUDIT_ARCH_X86_64;
rc = do_ptrace(PTRACE_SETSIGINFO,
pid, bad_request, (unsigned long) sip);
printf("ptrace(PTRACE_SETSIGINFO, %u, %#lx, {si_signo=SIGSYS"
", si_code=SYS_SECCOMP, si_errno=ENOENT, si_call_addr=%p"
", si_syscall=__NR_syscall_%u, si_arch=AUDIT_ARCH_X86_64})"
" = %ld %s (%m)\n",
(unsigned) pid, bad_request, sip->si_call_addr, sip->si_syscall,
rc, errno2name());
#endif
#if defined HAVE_SIGINFO_T_SI_TIMERID && defined HAVE_SIGINFO_T_SI_OVERRUN
memset(sip, -1, sizeof(*sip));
sip->si_signo = SIGHUP;
sip->si_code = SI_TIMER;
sip->si_errno = ENOENT;
sip->si_timerid = 0xdeadbeef;
sip->si_overrun = -1;
sip->si_ptr = (void *) (unsigned long) 0xfacefeeddeadbeef;
rc = do_ptrace(PTRACE_SETSIGINFO,
pid, bad_request, (unsigned long) sip);
printf("ptrace(PTRACE_SETSIGINFO, %u, %#lx, {si_signo=SIGHUP"
", si_code=SI_TIMER, si_errno=ENOENT, si_timerid=%#x"
", si_overrun=%d, si_value={int=%d, ptr=%p}}) = %ld %s (%m)\n",
(unsigned) pid, bad_request, sip->si_timerid, sip->si_overrun,
sip->si_int, sip->si_ptr, rc, errno2name());
#endif
rc = do_ptrace(PTRACE_GETSIGINFO,
pid, bad_request, (unsigned long) sip);
printf("ptrace(PTRACE_GETSIGINFO, %u, %#lx, %p)"
" = %ld %s (%m)\n", (unsigned) pid, bad_request, sip, rc, errno2name());
rc = do_ptrace(PTRACE_CONT, pid, 0, SIGUSR1);
printf("ptrace(PTRACE_CONT, %u, NULL, SIGUSR1) = %ld %s (%m)\n",
(unsigned) pid, rc, errno2name());
rc = do_ptrace(PTRACE_DETACH, pid, 0, SIGUSR2);
printf("ptrace(PTRACE_DETACH, %u, NULL, SIGUSR2) = %ld %s (%m)\n",
(unsigned) pid, rc, errno2name());
rc = do_ptrace(PTRACE_SYSCALL, pid, 0, SIGUSR1);
printf("ptrace(PTRACE_SYSCALL, %u, NULL, SIGUSR1) = %ld %s (%m)\n",
(unsigned) pid, rc, errno2name());
#ifdef PTRACE_SINGLESTEP
rc = do_ptrace(PTRACE_SINGLESTEP, pid, 0, SIGUSR2);
printf("ptrace(PTRACE_SINGLESTEP, %u, NULL, SIGUSR2) = %ld %s (%m)\n",
(unsigned) pid, rc, errno2name());
#endif
#ifdef PTRACE_SINGLEBLOCK
rc = do_ptrace(PTRACE_SINGLEBLOCK, pid, 0, SIGUSR1);
printf("ptrace(PTRACE_SINGLEBLOCK, %u, NULL, SIGUSR1) = %ld %s (%m)\n",
(unsigned) pid, rc, errno2name());
#endif
#ifdef PTRACE_SYSEMU
rc = do_ptrace(PTRACE_SYSEMU, pid, 0, SIGUSR2);
printf("ptrace(PTRACE_SYSEMU, %u, NULL, SIGUSR2) = %ld %s (%m)\n",
(unsigned) pid, rc, errno2name());
#endif
#ifdef PTRACE_SYSEMU_SINGLESTEP
rc = do_ptrace(PTRACE_SYSEMU_SINGLESTEP, pid, 0, SIGUSR1);
printf("ptrace(PTRACE_SYSEMU_SINGLESTEP, %u, NULL, SIGUSR1)"
" = %ld %s (%m)\n", (unsigned) pid, rc, errno2name());
#endif
rc = do_ptrace(PTRACE_SETOPTIONS,
pid, 0, PTRACE_O_TRACEFORK|PTRACE_O_TRACECLONE);
printf("ptrace(PTRACE_SETOPTIONS, %u, NULL"
", PTRACE_O_TRACEFORK|PTRACE_O_TRACECLONE) = %ld %s (%m)\n",
(unsigned) pid, rc, errno2name());
rc = do_ptrace(PTRACE_SEIZE,
pid, bad_request, PTRACE_O_TRACESYSGOOD);
printf("ptrace(PTRACE_SEIZE, %u, %#lx"
", PTRACE_O_TRACESYSGOOD) = %ld %s (%m)\n",
(unsigned) pid, bad_request, rc, errno2name());
rc = do_ptrace(PTRACE_SETREGSET, pid, 1, bad_request);
printf("ptrace(PTRACE_SETREGSET, %u, NT_PRSTATUS, %#lx)"
" = %ld %s (%m)\n",
(unsigned) pid, bad_request, rc, errno2name());
rc = do_ptrace(PTRACE_GETREGSET, pid, 3, bad_request);
printf("ptrace(PTRACE_GETREGSET, %u, NT_PRPSINFO, %#lx)"
" = %ld %s (%m)\n",
(unsigned) pid, bad_request, rc, errno2name());
test_peeksiginfo(pid, bad_request);
rc = do_ptrace(PTRACE_TRACEME, 0, 0, 0);
if (rc)
printf("ptrace(PTRACE_TRACEME) = %ld %s (%m)\n",
rc, errno2name());
else
printf("ptrace(PTRACE_TRACEME) = 0\n");
puts("+++ exited with 0 +++");
return 0;
}
#else
SKIP_MAIN_UNDEFINED("__NR_rt_sigprocmask")
#endif