// https://syzkaller.appspot.com/bug?id=5735d842f7ea3ed9220aca64952ac4aba7ba741c
// 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 execute_one();
extern unsigned long long procid;

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

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;
      }
    }
  }
}

uint64_t r[4] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff,
                 0x0};
unsigned long long procid;
void execute_call(int call)
{
  long res;
  switch (call) {
  case 0:
    *(uint32_t*)0x200000c0 = 0;
    *(uint32_t*)0x200000c4 = 0;
    *(uint32_t*)0x200000c8 = 0;
    *(uint32_t*)0x200000cc = 0;
    *(uint32_t*)0x200000d0 = 0;
    *(uint32_t*)0x200000d4 = 0;
    break;
  case 1:
    res = syscall(__NR_socket, 0xa, 0x2100000000000002, 0);
    if (res != -1)
      r[0] = res;
    break;
  case 2:
    res = syscall(__NR_socket, 0x10, 3, 6);
    if (res != -1)
      r[1] = res;
    break;
  case 3:
    *(uint16_t*)0x20000080 = 0x10;
    *(uint16_t*)0x20000082 = 0;
    *(uint32_t*)0x20000084 = 0;
    *(uint32_t*)0x20000088 = 1;
    syscall(__NR_bind, r[1], 0x20000080, 0xc);
    break;
  case 4:
    *(uint16_t*)0x200003c0 = 0xa;
    *(uint16_t*)0x200003c2 = htobe16(0);
    *(uint32_t*)0x200003c4 = 0;
    *(uint8_t*)0x200003c8 = 0;
    *(uint8_t*)0x200003c9 = 0;
    *(uint8_t*)0x200003ca = 0;
    *(uint8_t*)0x200003cb = 0;
    *(uint8_t*)0x200003cc = 0;
    *(uint8_t*)0x200003cd = 0;
    *(uint8_t*)0x200003ce = 0;
    *(uint8_t*)0x200003cf = 0;
    *(uint8_t*)0x200003d0 = 0;
    *(uint8_t*)0x200003d1 = 0;
    *(uint8_t*)0x200003d2 = -1;
    *(uint8_t*)0x200003d3 = -1;
    *(uint32_t*)0x200003d4 = htobe32(0x7f000001);
    *(uint32_t*)0x200003d8 = 0;
    syscall(__NR_connect, r[0], 0x200003c0, 0x1c);
    break;
  case 5:
    *(uint8_t*)0x200001c0 = 0xfe;
    *(uint8_t*)0x200001c1 = 0x80;
    *(uint8_t*)0x200001c2 = 0;
    *(uint8_t*)0x200001c3 = 0;
    *(uint8_t*)0x200001c4 = 0;
    *(uint8_t*)0x200001c5 = 0;
    *(uint8_t*)0x200001c6 = 0;
    *(uint8_t*)0x200001c7 = 0;
    *(uint8_t*)0x200001c8 = 0;
    *(uint8_t*)0x200001c9 = 0;
    *(uint8_t*)0x200001ca = 0;
    *(uint8_t*)0x200001cb = 0;
    *(uint8_t*)0x200001cc = 0;
    *(uint8_t*)0x200001cd = 0;
    *(uint8_t*)0x200001ce = 0;
    *(uint8_t*)0x200001cf = 0xbb;
    *(uint64_t*)0x200001d0 = htobe64(0);
    *(uint64_t*)0x200001d8 = htobe64(1);
    *(uint16_t*)0x200001e0 = htobe16(0);
    *(uint16_t*)0x200001e2 = htobe16(0);
    *(uint16_t*)0x200001e4 = htobe16(0);
    *(uint16_t*)0x200001e6 = htobe16(0);
    *(uint16_t*)0x200001e8 = 2;
    *(uint8_t*)0x200001ea = 0;
    *(uint8_t*)0x200001eb = 0;
    *(uint8_t*)0x200001ec = 0;
    *(uint32_t*)0x200001f0 = 0;
    *(uint32_t*)0x200001f4 = 0;
    *(uint64_t*)0x200001f8 = 0;
    *(uint64_t*)0x20000200 = 0;
    *(uint64_t*)0x20000208 = 0;
    *(uint64_t*)0x20000210 = 0;
    *(uint64_t*)0x20000218 = 0;
    *(uint64_t*)0x20000220 = 0;
    *(uint64_t*)0x20000228 = 0;
    *(uint64_t*)0x20000230 = 0;
    *(uint64_t*)0x20000238 = 0;
    *(uint64_t*)0x20000240 = 0;
    *(uint64_t*)0x20000248 = 0;
    *(uint64_t*)0x20000250 = 0;
    *(uint32_t*)0x20000258 = 0;
    *(uint32_t*)0x2000025c = 0;
    *(uint8_t*)0x20000260 = 1;
    *(uint8_t*)0x20000261 = 0;
    *(uint8_t*)0x20000262 = 0;
    *(uint8_t*)0x20000263 = 0;
    *(uint8_t*)0x20000268 = 0xac;
    *(uint8_t*)0x20000269 = 0x14;
    *(uint8_t*)0x2000026a = 0x14;
    *(uint8_t*)0x2000026b = 0;
    *(uint32_t*)0x20000278 = htobe32(0);
    *(uint8_t*)0x2000027c = 0x2b;
    *(uint16_t*)0x20000280 = 0;
    *(uint64_t*)0x20000284 = htobe64(0);
    *(uint64_t*)0x2000028c = htobe64(1);
    *(uint32_t*)0x20000294 = 0;
    *(uint8_t*)0x20000298 = 0;
    *(uint8_t*)0x20000299 = 0;
    *(uint8_t*)0x2000029a = 0x90;
    *(uint32_t*)0x2000029c = 0;
    *(uint32_t*)0x200002a0 = 0;
    *(uint32_t*)0x200002a4 = 0;
    syscall(__NR_setsockopt, r[0], 0x29, 0x23, 0x200001c0, 0xe8);
    break;
  case 6:
    res = syscall(__NR_inotify_init1, 0);
    if (res != -1)
      r[2] = res;
    break;
  case 7:
    syscall(__NR_fcntl, r[2], 8, -1);
    break;
  case 8:
    res = syscall(__NR_fcntl, r[2], 0x10, 0x20000080);
    if (res != -1)
      r[3] = *(uint32_t*)0x20000084;
    break;
  case 9:
    syscall(__NR_ptrace, 0xd, r[3], 0x4e5, 0x20000000);
    break;
  case 10:
    syscall(__NR_ptrace, 0x4206, r[3], 0, 0);
    break;
  case 11:
    syscall(__NR_ptrace, 0x4207, r[3]);
    break;
  }
}

void execute_one()
{
  execute(12);
  collide = 1;
  execute(12);
}

int main()
{
  syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0);
  for (procid = 0; procid < 8; procid++) {
    if (fork() == 0) {
      for (;;) {
        loop();
      }
    }
  }
  sleep(1000000);
  return 0;
}