// https://syzkaller.appspot.com/bug?id=af3a0728c8cbf6903ec2b0836441287cced00c1c
// autogenerated by syzkaller (http://github.com/google/syzkaller)

#define _GNU_SOURCE
#include <endian.h>
#include <errno.h>
#include <linux/futex.h>
#include <pthread.h>
#include <signal.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/prctl.h>
#include <sys/syscall.h>
#include <sys/time.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>

__attribute__((noreturn)) static void doexit(int status)
{
  volatile unsigned i;
  syscall(__NR_exit_group, status);
  for (i = 0;; i++) {
  }
}
#include <errno.h>
#include <stdarg.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>

const int kFailStatus = 67;
const int kRetryStatus = 69;

static void fail(const char* msg, ...)
{
  int e = errno;
  va_list args;
  va_start(args, msg);
  vfprintf(stderr, msg, args);
  va_end(args);
  fprintf(stderr, " (errno %d)\n", e);
  doexit((e == ENOMEM || e == EAGAIN) ? kRetryStatus : kFailStatus);
}

static uint64_t current_time_ms()
{
  struct timespec ts;

  if (clock_gettime(CLOCK_MONOTONIC, &ts))
    fail("clock_gettime failed");
  return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000;
}

static void execute_one();
extern unsigned long long procid;

static void loop()
{
  int iter;
  for (iter = 0;; iter++) {
    int pid = fork();
    if (pid < 0)
      fail("clone failed");
    if (pid == 0) {
      prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
      setpgrp();
      execute_one();
      doexit(0);
    }

    int status = 0;
    uint64_t start = current_time_ms();
    for (;;) {
      int res = waitpid(-1, &status, __WALL | WNOHANG);
      if (res == pid) {
        break;
      }
      usleep(1000);
      if (current_time_ms() - start < 3 * 1000)
        continue;
      kill(-pid, SIGKILL);
      kill(pid, SIGKILL);
      while (waitpid(-1, &status, __WALL) != pid) {
      }
      break;
    }
  }
}

struct thread_t {
  int created, running, call;
  pthread_t th;
};

static struct thread_t threads[16];
static void execute_call(int call);
static int running;
static int collide;

static void* thr(void* arg)
{
  struct thread_t* th = (struct thread_t*)arg;
  for (;;) {
    while (!__atomic_load_n(&th->running, __ATOMIC_ACQUIRE))
      syscall(SYS_futex, &th->running, FUTEX_WAIT, 0, 0);
    execute_call(th->call);
    __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED);
    __atomic_store_n(&th->running, 0, __ATOMIC_RELEASE);
    syscall(SYS_futex, &th->running, FUTEX_WAKE);
  }
  return 0;
}

static void execute(int num_calls)
{
  int call, thread;
  running = 0;
  for (call = 0; call < num_calls; call++) {
    for (thread = 0; thread < sizeof(threads) / sizeof(threads[0]); thread++) {
      struct thread_t* th = &threads[thread];
      if (!th->created) {
        th->created = 1;
        pthread_attr_t attr;
        pthread_attr_init(&attr);
        pthread_attr_setstacksize(&attr, 128 << 10);
        pthread_create(&th->th, &attr, thr, th);
      }
      if (!__atomic_load_n(&th->running, __ATOMIC_ACQUIRE)) {
        th->call = call;
        __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED);
        __atomic_store_n(&th->running, 1, __ATOMIC_RELEASE);
        syscall(SYS_futex, &th->running, FUTEX_WAKE);
        if (collide && call % 2)
          break;
        struct timespec ts;
        ts.tv_sec = 0;
        ts.tv_nsec = 20 * 1000 * 1000;
        syscall(SYS_futex, &th->running, FUTEX_WAIT, 1, &ts);
        if (__atomic_load_n(&running, __ATOMIC_RELAXED))
          usleep((call == num_calls - 1) ? 10000 : 1000);
        break;
      }
    }
  }
}

uint64_t r[8] = {0xffffffffffffffff, 0xffffffffffffffff,
                 0xffffffffffffffff, 0x0,
                 0xffffffffffffffff, 0xffffffffffffffff,
                 0xffffffffffffffff, 0xffffffffffffffff};
void execute_call(int call)
{
  long res;
  switch (call) {
  case 0:
    res = syscall(__NR_socket, 1, 7, 0);
    if (res != -1)
      r[0] = res;
    break;
  case 1:
    res = syscall(__NR_dup, -1);
    if (res != -1)
      r[1] = res;
    break;
  case 2:
    memcpy((void*)0x20000000, "\x54\x50\x52\x4f\x58\x59\x00\x00\x00\x00\x00\x00"
                              "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
                              "\x00\x00\x00\x00\x00",
           29);
    *(uint8_t*)0x2000001d = 0;
    *(uint32_t*)0x20000680 = 0x1e;
    syscall(__NR_getsockopt, r[1], 0, 0x43, 0x20000000, 0x20000680);
    break;
  case 3:
    syscall(__NR_dup, r[1]);
    break;
  case 4:
    *(uint64_t*)0x200006c0 = 0x20000100;
    *(uint64_t*)0x20000100 = 0;
    *(uint32_t*)0x20000108 = 0;
    *(uint32_t*)0x2000010c = 0;
    *(uint16_t*)0x20000110 = 7;
    *(uint16_t*)0x20000112 = 0xf12;
    *(uint32_t*)0x20000114 = r[0];
    *(uint64_t*)0x20000118 = 0x20000040;
    *(uint64_t*)0x20000120 = 0;
    *(uint64_t*)0x20000128 = 9;
    *(uint64_t*)0x20000130 = 0;
    *(uint32_t*)0x20000138 = 1;
    *(uint32_t*)0x2000013c = r[1];
    *(uint64_t*)0x200006c8 = 0x20000200;
    *(uint64_t*)0x20000200 = 0;
    *(uint32_t*)0x20000208 = 0;
    *(uint32_t*)0x2000020c = 0;
    *(uint16_t*)0x20000210 = 7;
    *(uint16_t*)0x20000212 = 0x46;
    *(uint32_t*)0x20000214 = r[0];
    *(uint64_t*)0x20000218 = 0x20000140;
    *(uint64_t*)0x20000220 = 0;
    *(uint64_t*)0x20000228 = 5;
    *(uint64_t*)0x20000230 = 0;
    *(uint32_t*)0x20000238 = 0;
    *(uint32_t*)0x2000023c = r[1];
    *(uint64_t*)0x200006d0 = 0x200002c0;
    *(uint64_t*)0x200002c0 = 0;
    *(uint32_t*)0x200002c8 = 0;
    *(uint32_t*)0x200002cc = 0;
    *(uint16_t*)0x200002d0 = 5;
    *(uint16_t*)0x200002d2 = 8;
    *(uint32_t*)0x200002d4 = r[0];
    *(uint64_t*)0x200002d8 = 0x20000240;
    *(uint64_t*)0x200002e0 = 0;
    *(uint64_t*)0x200002e8 = 1;
    *(uint64_t*)0x200002f0 = 0;
    *(uint32_t*)0x200002f8 = 0;
    *(uint32_t*)0x200002fc = r[1];
    *(uint64_t*)0x200006d8 = 0x20000400;
    *(uint64_t*)0x20000400 = 0;
    *(uint32_t*)0x20000408 = 0;
    *(uint32_t*)0x2000040c = 0;
    *(uint16_t*)0x20000410 = 0xd;
    *(uint16_t*)0x20000412 = 1;
    *(uint32_t*)0x20000414 = r[0];
    *(uint64_t*)0x20000418 = 0x20000300;
    *(uint64_t*)0x20000420 = 0;
    *(uint64_t*)0x20000428 = 0xfff;
    *(uint64_t*)0x20000430 = 0;
    *(uint32_t*)0x20000438 = 1;
    *(uint32_t*)0x2000043c = r[1];
    *(uint64_t*)0x200006e0 = 0x20000480;
    *(uint64_t*)0x20000480 = 0;
    *(uint32_t*)0x20000488 = 0;
    *(uint32_t*)0x2000048c = 0;
    *(uint16_t*)0x20000490 = 8;
    *(uint16_t*)0x20000492 = 0;
    *(uint32_t*)0x20000494 = r[1];
    *(uint64_t*)0x20000498 = 0x20000440;
    *(uint64_t*)0x200004a0 = 0;
    *(uint64_t*)0x200004a8 = 3;
    *(uint64_t*)0x200004b0 = 0;
    *(uint32_t*)0x200004b8 = 1;
    *(uint32_t*)0x200004bc = r[1];
    *(uint64_t*)0x200006e8 = 0x20000580;
    *(uint64_t*)0x20000580 = 0;
    *(uint32_t*)0x20000588 = 0;
    *(uint32_t*)0x2000058c = 0;
    *(uint16_t*)0x20000590 = 1;
    *(uint16_t*)0x20000592 = 6;
    *(uint32_t*)0x20000594 = r[0];
    *(uint64_t*)0x20000598 = 0x200004c0;
    *(uint64_t*)0x200005a0 = 0;
    *(uint64_t*)0x200005a8 = 1;
    *(uint64_t*)0x200005b0 = 0;
    *(uint32_t*)0x200005b8 = 0;
    *(uint32_t*)0x200005bc = r[1];
    *(uint64_t*)0x200006f0 = 0x20000640;
    *(uint64_t*)0x20000640 = 0;
    *(uint32_t*)0x20000648 = 0;
    *(uint32_t*)0x2000064c = 0;
    *(uint16_t*)0x20000650 = 1;
    *(uint16_t*)0x20000652 = 0xfffb;
    *(uint32_t*)0x20000654 = r[1];
    *(uint64_t*)0x20000658 = 0x200005c0;
    *(uint64_t*)0x20000660 = 0;
    *(uint64_t*)0x20000668 = 0xfff;
    *(uint64_t*)0x20000670 = 0;
    *(uint32_t*)0x20000678 = 1;
    *(uint32_t*)0x2000067c = r[1];
    syscall(__NR_io_submit, 0, 7, 0x200006c0);
    break;
  case 5:
    *(uint64_t*)0x200015c0 = 0x20000180;
    *(uint32_t*)0x200015c8 = 0x80;
    *(uint64_t*)0x200015d0 = 0x20001540;
    *(uint64_t*)0x20001540 = 0x20000200;
    *(uint64_t*)0x20001548 = 0x1000;
    *(uint64_t*)0x20001550 = 0x20001200;
    *(uint64_t*)0x20001558 = 0xfd;
    *(uint64_t*)0x20001560 = 0x20001300;
    *(uint64_t*)0x20001568 = 0x1d;
    *(uint64_t*)0x20001570 = 0x20001340;
    *(uint64_t*)0x20001578 = 0xf1;
    *(uint64_t*)0x20001580 = 0x20001440;
    *(uint64_t*)0x20001588 = 0x73;
    *(uint64_t*)0x20001590 = 0x200014c0;
    *(uint64_t*)0x20001598 = 0x7a;
    *(uint64_t*)0x200015d8 = 6;
    *(uint64_t*)0x200015e0 = 0;
    *(uint64_t*)0x200015e8 = 0;
    *(uint32_t*)0x200015f0 = 1;
    res = syscall(__NR_recvmsg, 0xffffff9c, 0x200015c0, 0x40000002);
    if (res != -1)
      r[2] = *(uint32_t*)0x2000018a;
    break;
  case 6:
    *(uint16_t*)0x20001600 = 2;
    *(uint16_t*)0x20001602 = htobe16(0x4e23);
    *(uint8_t*)0x20001604 = 0xac;
    *(uint8_t*)0x20001605 = 0x14;
    *(uint8_t*)0x20001606 = 0x14;
    *(uint8_t*)0x20001607 = 0xa;
    *(uint8_t*)0x20001608 = 0;
    *(uint8_t*)0x20001609 = 0;
    *(uint8_t*)0x2000160a = 0;
    *(uint8_t*)0x2000160b = 0;
    *(uint8_t*)0x2000160c = 0;
    *(uint8_t*)0x2000160d = 0;
    *(uint8_t*)0x2000160e = 0;
    *(uint8_t*)0x2000160f = 0;
    syscall(__NR_bind, r[2], 0x20001600, 0x10);
    break;
  case 7:
    res = syscall(__NR_io_setup, 0, 0x200000c0);
    if (res != -1)
      r[3] = *(uint64_t*)0x200000c0;
    break;
  case 8:
    *(uint64_t*)0x20000080 = 0x77359400;
    *(uint64_t*)0x20000088 = 0;
    syscall(__NR_io_getevents, r[3], 0xffffffffffff0103, 0x7fffffffffffcfc,
            0x20000000, 0x20000080);
    break;
  case 9:
    syscall(__NR_io_setup, 7, 0x20000000);
    break;
  case 10:
    *(uint32_t*)0x20000040 = 0;
    res = syscall(__NR_accept, 0xffffff9c, 0, 0x20000040);
    if (res != -1)
      r[4] = res;
    break;
  case 11:
    *(uint32_t*)0x20000140 = 8;
    syscall(__NR_getsockopt, r[4], 1, 0xd, 0x20000100, 0x20000140);
    break;
  case 12:
    res = syscall(__NR_socket, 1, 1, 0);
    if (res != -1)
      r[5] = res;
    break;
  case 13:
    res = syscall(__NR_socket, 0xa, 0x80807, -1);
    if (res != -1)
      r[6] = res;
    break;
  case 14:
    *(uint16_t*)0x20000000 = 0x303;
    *(uint16_t*)0x20000002 = 0x33;
    syscall(__NR_setsockopt, r[6], 6, 1, 0x20000000, 4);
    break;
  case 15:
    *(uint32_t*)0x200001c0 = 0;
    *(uint32_t*)0x200001c4 = 0;
    syscall(__NR_setsockopt, r[5], 1, 0xd, 0x200001c0, 0xfffffffffffffe5e);
    break;
  case 16:
    *(uint16_t*)0x20002500 = 0;
    *(uint64_t*)0x20002508 = 0x200024c0;
    syscall(__NR_ioctl, -1, 0x4b66, 0x20002500);
    break;
  case 17:
    memcpy((void*)0x20000000, "/dev/ptmx", 10);
    res = syscall(__NR_openat, 0xffffffffffffff9c, 0x20000000, 0x280, 0);
    if (res != -1)
      r[7] = res;
    break;
  case 18:
    syscall(__NR_read, r[7], 0x20000040, 0x27);
    break;
  }
}

void execute_one()
{
  execute(19);
  collide = 1;
  execute(19);
}

int main()
{
  syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0);
  for (;;) {
    loop();
  }
}