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strace/tests/ptrace.c
Eugene Syromyatnikov fd02ce4ff8 Implement PTRACE_SECCOMP_GET_METADATA ptrace request decoding 
* defs.h (seccomp_filter_flags): New declaration.
* process.c (SYS_FUNC(ptrace)): Implement PTRACE_SECCOMP_GET_METADATA
request decoding.
* ptrace.h [!PTRACE_SECCOMP_GET_METADATA] (PTRACE_SECCOMP_GET_METADATA):
New macro constant.
* xlat/ptrace_cmds.in (PTRACE_SECCOMP_GET_METADATA): New constant.
* tests/ptrace.c (main): Add some checks for PTRACE_SECCOMP_GET_METADATA
request decoding.
* NEWS: Mention it.

Co-Authored-by: Dmitry V. Levin <ldv@altlinux.org>
2018-03-06 23:52:08 +00:00

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/*
* Check decoding of ptrace syscall.
*
* Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
* Copyright (c) 2016-2018 The strace developers.
* 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 <asm/unistd.h>
#include <errno.h>
#include "ptrace.h"
#include <inttypes.h>
#include <signal.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <sys/wait.h>
#include <unistd.h>
#include <linux/audit.h>
static const char *errstr;
static long
do_ptrace(unsigned long request, unsigned long pid,
unsigned long addr, unsigned long data)
{
long rc = syscall(__NR_ptrace, request, pid, addr, data);
errstr = sprintrc(rc);
return rc;
}
static void
test_peeksiginfo(unsigned long pid, const unsigned long bad_request)
{
do_ptrace(PTRACE_PEEKSIGINFO, pid, 0, bad_request);
printf("ptrace(PTRACE_PEEKSIGINFO, %u, NULL, %#lx) = %s\n",
(unsigned) pid, bad_request, errstr);
struct {
unsigned long long off;
unsigned int flags, nr;
} *const psi = tail_alloc(sizeof(*psi));
psi->off = 0xdeadbeeffacefeedULL;
psi->flags = 1;
psi->nr = 42;
do_ptrace(PTRACE_PEEKSIGINFO, pid, (unsigned long) psi, bad_request);
printf("ptrace(PTRACE_PEEKSIGINFO, %u, {off=%llu"
", flags=PTRACE_PEEKSIGINFO_SHARED, nr=%u}, %#lx) = %s\n",
(unsigned) pid, psi->off, psi->nr, bad_request, errstr);
pid = fork();
if ((pid_t) 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);
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);
}
long 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) = %s\n",
(unsigned) pid, psi->off, psi->nr, sigs,
errstr);
} 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}"
"]) = %s\n",
(unsigned) pid, psi->off, psi->nr,
(unsigned) pid, (unsigned) uid,
(unsigned) pid, (unsigned) uid,
(unsigned) pid, (unsigned) uid,
errstr);
}
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) 0xdeadbeeffffffeedULL;
const unsigned long bad_data =
(unsigned long) 0xdeadcafefffff00dULL;
const unsigned long pid =
(unsigned long) 0xdefaced00000000ULL | (unsigned) getpid();
uint64_t *filter_off = tail_alloc(sizeof(*filter_off));
const unsigned int sigset_size = get_sigset_size();
void *const k_set = tail_alloc(sigset_size);
TAIL_ALLOC_OBJECT_CONST_PTR(siginfo_t, sip);
do_ptrace(bad_request, pid, 0, 0);
printf("ptrace(%#lx /* PTRACE_??? */, %u, NULL, NULL) = %s\n",
bad_request, (unsigned) pid, errstr);
do_ptrace(PTRACE_PEEKDATA, pid, bad_request, bad_data);
#ifdef IA64
printf("ptrace(PTRACE_PEEKDATA, %u, %#lx) = %s\n",
(unsigned) pid, bad_request, errstr);
#else
printf("ptrace(PTRACE_PEEKDATA, %u, %#lx, %#lx) = %s\n",
(unsigned) pid, bad_request, bad_data, errstr);
#endif
do_ptrace(PTRACE_PEEKTEXT, pid, bad_request, bad_data);
#ifdef IA64
printf("ptrace(PTRACE_PEEKTEXT, %u, %#lx) = %s\n",
(unsigned) pid, bad_request, errstr);
#else
printf("ptrace(PTRACE_PEEKTEXT, %u, %#lx, %#lx) = %s\n",
(unsigned) pid, bad_request, bad_data, errstr);
#endif
do_ptrace(PTRACE_PEEKUSER, pid, bad_request, bad_data);
#ifdef IA64
printf("ptrace(PTRACE_PEEKUSER, %u, %#lx) = %s\n",
(unsigned) pid, bad_request, errstr);
#else
printf("ptrace(PTRACE_PEEKUSER, %u, %#lx, %#lx) = %s\n",
(unsigned) pid, bad_request, bad_data, errstr);
#endif
do_ptrace(PTRACE_POKEUSER, pid, bad_request, bad_data);
printf("ptrace(PTRACE_POKEUSER, %u, %#lx, %#lx) = %s\n",
(unsigned) pid, bad_request, bad_data, errstr);
do_ptrace(PTRACE_ATTACH, pid, 0, 0);
printf("ptrace(PTRACE_ATTACH, %u) = %s\n", (unsigned) pid, errstr);
do_ptrace(PTRACE_INTERRUPT, pid, 0, 0);
printf("ptrace(PTRACE_INTERRUPT, %u) = %s\n", (unsigned) pid, errstr);
do_ptrace(PTRACE_KILL, pid, 0, 0);
printf("ptrace(PTRACE_KILL, %u) = %s\n", (unsigned) pid, errstr);
do_ptrace(PTRACE_LISTEN, pid, 0, 0);
printf("ptrace(PTRACE_LISTEN, %u) = %s\n", (unsigned) pid, errstr);
sigset_t libc_set;
sigemptyset(&libc_set);
sigaddset(&libc_set, SIGUSR1);
memcpy(k_set, &libc_set, sigset_size);
do_ptrace(PTRACE_SETSIGMASK, pid, sigset_size, (unsigned long) k_set);
printf("ptrace(PTRACE_SETSIGMASK, %u, %u, [USR1]) = %s\n",
(unsigned) pid, sigset_size, errstr);
do_ptrace(PTRACE_GETSIGMASK, pid, sigset_size, (unsigned long) k_set);
printf("ptrace(PTRACE_GETSIGMASK, %u, %u, %p) = %s\n",
(unsigned) pid, sigset_size, k_set, errstr);
do_ptrace(PTRACE_SECCOMP_GET_FILTER, pid, 42, 0);
printf("ptrace(PTRACE_SECCOMP_GET_FILTER, %u, 42, NULL) = %s\n",
(unsigned) pid, errstr);
do_ptrace(PTRACE_SECCOMP_GET_METADATA, pid, bad_data, 0);
printf("ptrace(PTRACE_SECCOMP_GET_METADATA, %u, %lu, NULL) = %s\n",
(unsigned) pid, bad_data, errstr);
do_ptrace(PTRACE_SECCOMP_GET_METADATA, pid, 7,
(unsigned long) filter_off);
printf("ptrace(PTRACE_SECCOMP_GET_METADATA, %u, 7, %p) = %s\n",
(unsigned) pid, filter_off, errstr);
*filter_off = 0xfacefeeddeadc0deULL;
do_ptrace(PTRACE_SECCOMP_GET_METADATA, pid, bad_data,
(unsigned long) filter_off);
printf("ptrace(PTRACE_SECCOMP_GET_METADATA, %u, %lu, "
"{filter_off=%" PRIu64 "}) = %s\n",
(unsigned) pid, bad_data, *filter_off, errstr);
do_ptrace(PTRACE_GETEVENTMSG, pid, bad_request, bad_data);
printf("ptrace(PTRACE_GETEVENTMSG, %u, %#lx, %#lx) = %s\n",
(unsigned) pid, bad_request, bad_data, errstr);
memset(sip, -1, sizeof(*sip));
sip->si_signo = SIGIO;
sip->si_code = 1;
sip->si_errno = ENOENT;
sip->si_band = -2;
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}) = %s\n",
(unsigned) pid, bad_request, errstr);
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;
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}}) = %s\n",
(unsigned) pid, bad_request, sip->si_int, sip->si_ptr,
errstr);
memset(sip, -1, sizeof(*sip));
sip->si_signo = SIGILL;
sip->si_code = 1;
sip->si_errno = ENOENT;
sip->si_addr = (void *) (unsigned long) 0xfacefeeddeadbeefULL;
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}) = %s\n",
(unsigned) pid, bad_request, sip->si_addr, errstr);
memset(sip, -1, sizeof(*sip));
sip->si_signo = SIGFPE;
sip->si_code = 1;
sip->si_errno = ENOENT;
sip->si_addr = (void *) (unsigned long) 0xfacefeeddeadbeefULL;
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}) = %s\n",
(unsigned) pid, bad_request, sip->si_addr, errstr);
memset(sip, -1, sizeof(*sip));
sip->si_signo = SIGBUS;
sip->si_code = 1;
sip->si_errno = -2;
sip->si_addr = (void *) (unsigned long) 0xfacefeeddeadbeefULL;
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}) = %s\n",
(unsigned) pid, bad_request, sip->si_errno, sip->si_addr,
errstr);
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;
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}) = %s\n",
(unsigned) pid, bad_request, sip->si_code, sip->si_errno,
errstr);
#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) 0xfacefeeddeadbeefULL;
sip->si_syscall = -1U;
sip->si_arch = AUDIT_ARCH_X86_64;
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=%u, si_arch=AUDIT_ARCH_X86_64})"
" = %s\n",
(unsigned) pid, bad_request, sip->si_call_addr, sip->si_syscall,
errstr);
sip->si_errno = 3141592653U;
sip->si_call_addr = NULL;
sip->si_syscall = __NR_read;
sip->si_arch = 0xda7a1057;
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=%d, si_call_addr=NULL"
", si_syscall=__NR_read, si_arch=%#x /* AUDIT_ARCH_??? */})"
" = %s\n",
(unsigned) pid, bad_request, sip->si_errno, sip->si_arch,
errstr);
#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) 0xfacefeeddeadbeefULL;
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}}) = %s\n",
(unsigned) pid, bad_request, sip->si_timerid, sip->si_overrun,
sip->si_int, sip->si_ptr, errstr);
#endif
do_ptrace(PTRACE_GETSIGINFO, pid, bad_request, (unsigned long) sip);
printf("ptrace(PTRACE_GETSIGINFO, %u, %#lx, %p)"
" = %s\n", (unsigned) pid, bad_request, sip, errstr);
do_ptrace(PTRACE_CONT, pid, 0, SIGUSR1);
printf("ptrace(PTRACE_CONT, %u, NULL, SIGUSR1) = %s\n",
(unsigned) pid, errstr);
do_ptrace(PTRACE_DETACH, pid, 0, SIGUSR2);
printf("ptrace(PTRACE_DETACH, %u, NULL, SIGUSR2) = %s\n",
(unsigned) pid, errstr);
do_ptrace(PTRACE_SYSCALL, pid, 0, SIGUSR1);
printf("ptrace(PTRACE_SYSCALL, %u, NULL, SIGUSR1) = %s\n",
(unsigned) pid, errstr);
#ifdef PTRACE_SINGLESTEP
do_ptrace(PTRACE_SINGLESTEP, pid, 0, SIGUSR2);
printf("ptrace(PTRACE_SINGLESTEP, %u, NULL, SIGUSR2) = %s\n",
(unsigned) pid, errstr);
#endif
#ifdef PTRACE_SINGLEBLOCK
do_ptrace(PTRACE_SINGLEBLOCK, pid, 0, SIGUSR1);
printf("ptrace(PTRACE_SINGLEBLOCK, %u, NULL, SIGUSR1) = %s\n",
(unsigned) pid, errstr);
#endif
#ifdef PTRACE_SYSEMU
do_ptrace(PTRACE_SYSEMU, pid, 0, SIGUSR2);
printf("ptrace(PTRACE_SYSEMU, %u, NULL, SIGUSR2) = %s\n",
(unsigned) pid, errstr);
#endif
#ifdef PTRACE_SYSEMU_SINGLESTEP
do_ptrace(PTRACE_SYSEMU_SINGLESTEP, pid, 0, SIGUSR1);
printf("ptrace(PTRACE_SYSEMU_SINGLESTEP, %u, NULL, SIGUSR1) = %s\n",
(unsigned) pid, errstr);
#endif
do_ptrace(PTRACE_SETOPTIONS,
pid, 0, PTRACE_O_TRACEFORK|PTRACE_O_TRACECLONE);
printf("ptrace(PTRACE_SETOPTIONS, %u, NULL"
", PTRACE_O_TRACEFORK|PTRACE_O_TRACECLONE) = %s\n",
(unsigned) pid, errstr);
do_ptrace(PTRACE_SEIZE, pid, bad_request, PTRACE_O_TRACESYSGOOD);
printf("ptrace(PTRACE_SEIZE, %u, %#lx, PTRACE_O_TRACESYSGOOD) = %s\n",
(unsigned) pid, bad_request, errstr);
do_ptrace(PTRACE_SETREGSET, pid, 1, bad_request);
printf("ptrace(PTRACE_SETREGSET, %u, NT_PRSTATUS, %#lx) = %s\n",
(unsigned) pid, bad_request, errstr);
do_ptrace(PTRACE_GETREGSET, pid, 3, bad_request);
printf("ptrace(PTRACE_GETREGSET, %u, NT_PRPSINFO, %#lx) = %s\n",
(unsigned) pid, bad_request, errstr);
test_peeksiginfo(pid, bad_request);
do_ptrace(PTRACE_TRACEME, 0, 0, 0);
printf("ptrace(PTRACE_TRACEME) = %s\n", errstr);
puts("+++ exited with 0 +++");
return 0;
}
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