--- /dev/null
+/*
+ * 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) 0xdeadbeeffacefeed;
+ const unsigned long bad_data =
+ (unsigned long) 0xdeadcafefacef00d;
+ 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
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