// https://syzkaller.appspot.com/bug?id=b6aff64ebd79a1ee5ee7e787ca5b8673ba722226
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <sys/types.h>

#include <errno.h>
#include <pthread.h>
#include <pwd.h>
#include <signal.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/endian.h>
#include <sys/syscall.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>

static unsigned long long procid;

static void kill_and_wait(int pid, int* status)
{
  kill(pid, SIGKILL);
  while (waitpid(-1, status, 0) != pid) {
  }
}

static void sleep_ms(uint64_t ms)
{
  usleep(ms * 1000);
}

static uint64_t current_time_ms(void)
{
  struct timespec ts;
  if (clock_gettime(CLOCK_MONOTONIC, &ts))
    exit(1);
  return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000;
}

static void thread_start(void* (*fn)(void*), void* arg)
{
  pthread_t th;
  pthread_attr_t attr;
  pthread_attr_init(&attr);
  pthread_attr_setstacksize(&attr, 128 << 10);
  int i = 0;
  for (; i < 100; i++) {
    if (pthread_create(&th, &attr, fn, arg) == 0) {
      pthread_attr_destroy(&attr);
      return;
    }
    if (errno == EAGAIN) {
      usleep(50);
      continue;
    }
    break;
  }
  exit(1);
}

typedef struct {
  pthread_mutex_t mu;
  pthread_cond_t cv;
  int state;
} event_t;

static void event_init(event_t* ev)
{
  if (pthread_mutex_init(&ev->mu, 0))
    exit(1);
  if (pthread_cond_init(&ev->cv, 0))
    exit(1);
  ev->state = 0;
}

static void event_reset(event_t* ev)
{
  ev->state = 0;
}

static void event_set(event_t* ev)
{
  pthread_mutex_lock(&ev->mu);
  if (ev->state)
    exit(1);
  ev->state = 1;
  pthread_mutex_unlock(&ev->mu);
  pthread_cond_broadcast(&ev->cv);
}

static void event_wait(event_t* ev)
{
  pthread_mutex_lock(&ev->mu);
  while (!ev->state)
    pthread_cond_wait(&ev->cv, &ev->mu);
  pthread_mutex_unlock(&ev->mu);
}

static int event_isset(event_t* ev)
{
  pthread_mutex_lock(&ev->mu);
  int res = ev->state;
  pthread_mutex_unlock(&ev->mu);
  return res;
}

static int event_timedwait(event_t* ev, uint64_t timeout)
{
  uint64_t start = current_time_ms();
  uint64_t now = start;
  pthread_mutex_lock(&ev->mu);
  for (;;) {
    if (ev->state)
      break;
    uint64_t remain = timeout - (now - start);
    struct timespec ts;
    ts.tv_sec = remain / 1000;
    ts.tv_nsec = (remain % 1000) * 1000 * 1000;
    pthread_cond_timedwait(&ev->cv, &ev->mu, &ts);
    now = current_time_ms();
    if (now - start > timeout)
      break;
  }
  int res = ev->state;
  pthread_mutex_unlock(&ev->mu);
  return res;
}

struct thread_t {
  int created, call;
  event_t ready, done;
};

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

static void* thr(void* arg)
{
  struct thread_t* th = (struct thread_t*)arg;
  for (;;) {
    event_wait(&th->ready);
    event_reset(&th->ready);
    execute_call(th->call);
    __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED);
    event_set(&th->done);
  }
  return 0;
}

static void execute_one(void)
{
  int i, call, thread;
  int collide = 0;
again:
  for (call = 0; call < 10; call++) {
    for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0]));
         thread++) {
      struct thread_t* th = &threads[thread];
      if (!th->created) {
        th->created = 1;
        event_init(&th->ready);
        event_init(&th->done);
        event_set(&th->done);
        thread_start(thr, th);
      }
      if (!event_isset(&th->done))
        continue;
      event_reset(&th->done);
      th->call = call;
      __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED);
      event_set(&th->ready);
      if (collide && (call % 2) == 0)
        break;
      event_timedwait(&th->done, 50);
      break;
    }
  }
  for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++)
    sleep_ms(1);
  if (!collide) {
    collide = 1;
    goto again;
  }
}

static void execute_one(void);

#define WAIT_FLAGS 0

static void loop(void)
{
  int iter = 0;
  for (;; iter++) {
    int pid = fork();
    if (pid < 0)
      exit(1);
    if (pid == 0) {
      execute_one();
      exit(0);
    }
    int status = 0;
    uint64_t start = current_time_ms();
    for (;;) {
      if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid)
        break;
      sleep_ms(1);
      if (current_time_ms() - start < 5000) {
        continue;
      }
      kill_and_wait(pid, &status);
      break;
    }
  }
}

uint64_t r[2] = {0xffffffffffffffff, 0xffffffffffffffff};

void execute_call(int call)
{
  intptr_t res = 0;
  switch (call) {
  case 0:
    *(uint32_t*)0x20000140 = 0;
    *(uint16_t*)0x20000144 = 0xe;
    *(uint8_t*)0x20000146 = 1;
    syscall(SYS_setsockopt, -1, 0x84, 0x1e, 0x20000140ul, 8ul);
    break;
  case 1:
    syscall(SYS_pipe2, 0ul, 4ul);
    break;
  case 2:
    *(uint8_t*)0x200000c0 = 0x10;
    *(uint8_t*)0x200000c1 = 2;
    *(uint16_t*)0x200000c2 = htobe16(0x4e21 + procid * 4);
    *(uint32_t*)0x200000c4 = htobe32(-1);
    *(uint8_t*)0x200000c8 = 0;
    *(uint8_t*)0x200000c9 = 0;
    *(uint8_t*)0x200000ca = 0;
    *(uint8_t*)0x200000cb = 0;
    *(uint8_t*)0x200000cc = 0;
    *(uint8_t*)0x200000cd = 0;
    *(uint8_t*)0x200000ce = 0;
    *(uint8_t*)0x200000cf = 0;
    syscall(SYS_connect, -1, 0x200000c0ul, 0x10ul);
    break;
  case 3:
    res = syscall(SYS_socket, 2ul, 1ul, 0x84);
    if (res != -1)
      r[0] = res;
    break;
  case 4:
    res = syscall(SYS_dup, r[0]);
    if (res != -1)
      r[1] = res;
    break;
  case 5:
    *(uint64_t*)0x200007c0 = 0x20000180;
    *(uint8_t*)0x20000180 = 0x1c;
    *(uint8_t*)0x20000181 = 0x1c;
    *(uint16_t*)0x20000182 = htobe16(0x4e23 + procid * 4);
    *(uint32_t*)0x20000184 = 0xfff;
    *(uint64_t*)0x20000188 = htobe64(0);
    *(uint64_t*)0x20000190 = htobe64(1);
    *(uint32_t*)0x20000198 = 0x253f;
    *(uint32_t*)0x200007c8 = 0x1c;
    *(uint64_t*)0x200007d0 = 0;
    *(uint32_t*)0x200007d8 = 0;
    *(uint64_t*)0x200007e0 = 0x20000780;
    *(uint32_t*)0x20000780 = 0x1c;
    *(uint32_t*)0x20000784 = 0x84;
    *(uint32_t*)0x20000788 = 0xa;
    *(uint64_t*)0x2000078c = htobe64(0);
    *(uint64_t*)0x20000794 = htobe64(1);
    *(uint32_t*)0x2000079c = 0x1c;
    *(uint32_t*)0x200007a0 = 0x84;
    *(uint32_t*)0x200007a4 = 0xa;
    memcpy((void*)0x200007a8,
           "\x71\xfd\x17\x9d\x1d\x53\x17\x9f\xb7\x03\x0c\x21\xd4\x78\xae\x70",
           16);
    *(uint32_t*)0x200007e8 = 0x38;
    *(uint32_t*)0x200007ec = 0x10000;
    syscall(SYS_sendmsg, r[1], 0x200007c0ul, 0x108ul);
    break;
  case 6:
    *(uint64_t*)0x20000a40 = 0x20000800;
    memcpy(
        (void*)0x20000800,
        "\x42\xcb\x14\x75\x0b\x9c\xb5\xcc\xa0\x5b\xb7\xbc\x66\xb5\x3c\xee\x62"
        "\x7f\x33\x29\xd7\x1e\xb3\xec\xe6\xd6\xb9\x9d\x87\xd7\x6a\x3d\x6c\xe3"
        "\x12\x2e\x1d\xf4\x0f\x02\xd6\xd8\x61\x5a\xd1\x44\x5f\xfa\x0f\x77\x1b"
        "\xca\x50\x75\x1a\xed\xa7\xd7\x5b\xce\x6a\xf8\xdb\x1c\x9e\xe8\xcd\xfd"
        "\xcd\x59\x34\xfc\x2a\xfc\x35\x7c\xf5\x9e\x3a\x36\x32\x93\xee\x91\xe4"
        "\xcb\xfe\x80\x34\xb3\x2a\x7e\x4f\xf2\x73\x1d\x33\x2f\xf8\x66\x42\x1f"
        "\xc0\xad\xed\x7f\xa7\x5b\x3d\xc5\x77\x46\x5a\x5b\xeb\xda\x0c\x39\x5a"
        "\xa9\x93\x72\xa7\x1e\x25\x21\x3e\x11\x06\xf3\xaa\xcb\xd8\x26\xed\xcd"
        "\xb8\x10\x61\x56\x26\x94\xd7\x8f\xac\x26\xec\x46\xea\xb8\xaa",
        151);
    *(uint64_t*)0x20000a48 = 0x97;
    *(uint64_t*)0x20000a50 = 0x200008c0;
    *(uint64_t*)0x20000a58 = 0;
    *(uint64_t*)0x20000a60 = 0x20000940;
    memcpy(
        (void*)0x20000940,
        "\xa4\x3f\xf5\xc7\xb5\x13\xef\x61\x97\x0f\xcd\x2c\x84\xe3\x3d\x11\xd4"
        "\x97\xeb\x8f\x99\x5a\x2f\x00\xf9\xe7\xb4\x9a\x12\xfb\xd7\xdd\x6e\x3c"
        "\x4a\x1d\xc4\xc4\x8e\x09\x33\x38\x80\x8f\x7d\xca\x41\x7b\xa6\x58\x3c"
        "\x88\x55\x6c\x88\xb4\x10\x5c\x52\x78\x61\xc1\x60\x51\x7e\xe9\xac\xb7"
        "\x39\x83\xc1\x09\x4e\x0f\x47\x1f\xc8\xc6\x94\x4f\x34\x0e\x2b\x83\x50"
        "\xb0\xa9\x76\xd1\x27\xb1\x40\x0f\xc9\xce\x60\x95\x0b\xea\x8d\x44\x1e"
        "\x9e\x3a\x4f\x12\x3b\x8d\xc7\xf0\x10\x54\x26\x9c\x2c\x3e\xf7\x82\x06"
        "\x57\x6f\x0b\xaf\x62\x3f\x44\x1e\xa5\x83\x5e\x0a\xfe\xa5\x67\xb1\x1a"
        "\x01\x72\xf1\x4d\xa9\xd4\x83\xf6\x3f\x1a\x70\x9a\xd8\xe6\x0b\x97\x8e"
        "\x8e\x02\x06\x6c\xc0\xda\x89\x89\x56\x38\x0d\xe9\x49\x07\x9d\x82\x46"
        "\x51\xc6\x09\xbb\x7e\xf0\x88\x10\xe3\xbe\x6f\x31\xf4\xc9\xbd\xaa\x3a"
        "\x14\x6f\xa5\xc7\xd1\x1c\xfe\x3d\x6e\x3a\xb5\xfd\x10",
        200);
    *(uint64_t*)0x20000a68 = 0xc8;
    syscall(SYS_writev, -1, 0x20000a40ul, 3ul);
    break;
  case 7:
    *(uint8_t*)0x20000300 = 0x10;
    *(uint8_t*)0x20000301 = 2;
    *(uint16_t*)0x20000302 = htobe16(0x4e23 + procid * 4);
    *(uint8_t*)0x20000304 = 0xac;
    *(uint8_t*)0x20000305 = 0x14;
    *(uint8_t*)0x20000306 = 0 + procid * 1;
    *(uint8_t*)0x20000307 = 0xaa;
    *(uint8_t*)0x20000308 = 0;
    *(uint8_t*)0x20000309 = 0;
    *(uint8_t*)0x2000030a = 0;
    *(uint8_t*)0x2000030b = 0;
    *(uint8_t*)0x2000030c = 0;
    *(uint8_t*)0x2000030d = 0;
    *(uint8_t*)0x2000030e = 0;
    *(uint8_t*)0x2000030f = 0;
    syscall(SYS_bind, r[0], 0x20000300ul, 0x10ul);
    break;
  case 8:
    *(uint8_t*)0x20000000 = 0x10;
    *(uint8_t*)0x20000001 = 2;
    *(uint16_t*)0x20000002 = htobe16(0x4e23 + procid * 4);
    *(uint8_t*)0x20000004 = 0xac;
    *(uint8_t*)0x20000005 = 0x14;
    *(uint8_t*)0x20000006 = 0 + procid * 1;
    *(uint8_t*)0x20000007 = 0xaa;
    *(uint8_t*)0x20000008 = 0;
    *(uint8_t*)0x20000009 = 0;
    *(uint8_t*)0x2000000a = 0;
    *(uint8_t*)0x2000000b = 0;
    *(uint8_t*)0x2000000c = 0;
    *(uint8_t*)0x2000000d = 0;
    *(uint8_t*)0x2000000e = 0;
    *(uint8_t*)0x2000000f = 0;
    syscall(SYS_connect, r[0], 0x20000000ul, 0x10ul);
    break;
  case 9:
    syscall(SYS_listen, r[0], 0xffffff78);
    break;
  }
}
int main(void)
{
  syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x1012ul, -1, 0ul);
  for (procid = 0; procid < 4; procid++) {
    if (fork() == 0) {
      loop();
    }
  }
  sleep(1000000);
  return 0;
}