// https://syzkaller.appspot.com/bug?id=7c7bd742d3b6b7473427759ad255c581dbd94412
// autogenerated by syzkaller (http://github.com/google/syzkaller)

#define _GNU_SOURCE
#include <endian.h>
#include <linux/futex.h>
#include <pthread.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <sys/syscall.h>
#include <unistd.h>

static void test();

void loop()
{
  while (1) {
    test();
  }
}

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 (running)
          usleep((call == num_calls - 1) ? 10000 : 1000);
        break;
      }
    }
  }
}

long r[2];
uint64_t procid;
void execute_call(int call)
{
  switch (call) {
  case 0:
    syscall(__NR_mmap, 0x20000000, 0xfff000, 3, 0x32, -1, 0);
    break;
  case 1:
    r[0] = syscall(__NR_socket, 2, 1, 0);
    break;
  case 2:
    *(uint32_t*)0x2039c000 = 1;
    syscall(__NR_setsockopt, r[0], 6, 0x10000000013, 0x2039c000, 4);
    break;
  case 3:
    *(uint32_t*)0x20383000 = 1;
    syscall(__NR_setsockopt, r[0], 6, 0x14, 0x20383000, 4);
    break;
  case 4:
    r[1] = syscall(__NR_dup, r[0]);
    break;
  case 5:
    *(uint16_t*)0x20e45ff0 = 2;
    *(uint16_t*)0x20e45ff2 = 0;
    *(uint32_t*)0x20e45ff4 = htobe32(0x7f000001);
    *(uint8_t*)0x20e45ff8 = 0;
    *(uint8_t*)0x20e45ff9 = 0;
    *(uint8_t*)0x20e45ffa = 0;
    *(uint8_t*)0x20e45ffb = 0;
    *(uint8_t*)0x20e45ffc = 0;
    *(uint8_t*)0x20e45ffd = 0;
    *(uint8_t*)0x20e45ffe = 0;
    *(uint8_t*)0x20e45fff = 0;
    syscall(__NR_sendto, r[0], 0x20482000, 0xffffffffffffff56,
            0x800000120000401, 0x20e45ff0, 0x10);
    break;
  case 6:
    *(uint64_t*)0x20789fc8 = 0x20ca4ff4;
    *(uint32_t*)0x20789fd0 = 0xc;
    *(uint64_t*)0x20789fd8 = 0x20126000;
    *(uint64_t*)0x20789fe0 = 1;
    *(uint64_t*)0x20789fe8 = 0;
    *(uint64_t*)0x20789ff0 = 0;
    *(uint32_t*)0x20789ff8 = 0;
    *(uint16_t*)0x20ca4ff4 = 0x10;
    *(uint16_t*)0x20ca4ff6 = 0;
    *(uint32_t*)0x20ca4ff8 = 0;
    *(uint32_t*)0x20ca4ffc = 0;
    *(uint64_t*)0x20126000 = 0x209ebfa0;
    *(uint64_t*)0x20126008 = 0x4c;
    *(uint32_t*)0x209ebfa0 = 0x4c;
    *(uint16_t*)0x209ebfa4 = 0x20;
    *(uint16_t*)0x209ebfa6 = 0;
    *(uint32_t*)0x209ebfa8 = 0;
    *(uint32_t*)0x209ebfac = 0;
    *(uint8_t*)0x209ebfb0 = 0;
    *(uint32_t*)0x209ebfb4 = htobe32(-1);
    *(uint8_t*)0x209ebfc4 = 0xfe;
    *(uint8_t*)0x209ebfc5 = 0x80;
    *(uint8_t*)0x209ebfc6 = 0;
    *(uint8_t*)0x209ebfc7 = 0;
    *(uint8_t*)0x209ebfc8 = 0;
    *(uint8_t*)0x209ebfc9 = 0;
    *(uint8_t*)0x209ebfca = 0;
    *(uint8_t*)0x209ebfcb = 0;
    *(uint8_t*)0x209ebfcc = 0;
    *(uint8_t*)0x209ebfcd = 0;
    *(uint8_t*)0x209ebfce = 0;
    *(uint8_t*)0x209ebfcf = 0;
    *(uint8_t*)0x209ebfd0 = 0;
    *(uint8_t*)0x209ebfd1 = 0;
    *(uint8_t*)0x209ebfd2 = 0;
    *(uint8_t*)0x209ebfd3 = 0xbb;
    *(uint16_t*)0x209ebfd4 = 0;
    *(uint16_t*)0x209ebfd6 = htobe16(0);
    *(uint16_t*)0x209ebfd8 = 0;
    *(uint16_t*)0x209ebfda = htobe16(0);
    *(uint16_t*)0x209ebfdc = 0;
    *(uint8_t*)0x209ebfde = 0;
    *(uint8_t*)0x209ebfdf = 0;
    *(uint8_t*)0x209ebfe0 = 0;
    *(uint32_t*)0x209ebfe4 = 0;
    *(uint32_t*)0x209ebfe8 = 0;
    syscall(__NR_sendmsg, r[1], 0x20789fc8, 0);
    break;
  case 7:
    *(uint8_t*)0x208f5fee = -1;
    *(uint8_t*)0x208f5fef = -1;
    *(uint8_t*)0x208f5ff0 = -1;
    *(uint8_t*)0x208f5ff1 = -1;
    *(uint8_t*)0x208f5ff2 = -1;
    *(uint8_t*)0x208f5ff3 = -1;
    *(uint8_t*)0x208f5ff4 = -1;
    *(uint8_t*)0x208f5ff5 = -1;
    *(uint8_t*)0x208f5ff6 = -1;
    *(uint8_t*)0x208f5ff7 = -1;
    *(uint8_t*)0x208f5ff8 = -1;
    *(uint8_t*)0x208f5ff9 = -1;
    *(uint16_t*)0x208f5ffa = htobe16(0x8906);
    break;
  }
}

void test()
{
  memset(r, -1, sizeof(r));
  execute(8);
  collide = 1;
  execute(8);
}

int main()
{
  for (procid = 0; procid < 8; procid++) {
    if (fork() == 0) {
      for (;;) {
        loop();
      }
    }
  }
  sleep(1000000);
  return 0;
}