// https://syzkaller.appspot.com/bug?id=a2c1393a92634b515391d1e54519dda3fd87e86c
// autogenerated by syzkaller (http://github.com/google/syzkaller)

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

static uintptr_t syz_open_dev(uintptr_t a0, uintptr_t a1, uintptr_t a2)
{
  if (a0 == 0xc || a0 == 0xb) {
    char buf[128];
    sprintf(buf, "/dev/%s/%d:%d", a0 == 0xc ? "char" : "block", (uint8_t)a1,
            (uint8_t)a2);
    return open(buf, O_RDWR, 0);
  } else {
    char buf[1024];
    char* hash;
    strncpy(buf, (char*)a0, sizeof(buf));
    buf[sizeof(buf) - 1] = 0;
    while ((hash = strchr(buf, '#'))) {
      *hash = '0' + (char)(a1 % 10);
      a1 /= 10;
    }
    return open(buf, a2, 0);
  }
}

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[6] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff,
                 0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff};
unsigned long long procid;
void execute_call(int call)
{
  long res;
  switch (call) {
  case 0:
    memcpy((void*)0x20000040, "user", 5);
    *(uint8_t*)0x20000080 = 0x73;
    *(uint8_t*)0x20000081 = 0x79;
    *(uint8_t*)0x20000082 = 0x7a;
    *(uint8_t*)0x20000083 = 0;
    *(uint8_t*)0x20000084 = 0;
    syscall(__NR_add_key, 0x20000040, 0x20000080, 0x200000c0, 0, 0xfffffffb);
    break;
  case 1:
    memcpy((void*)0x20000280, "/selinux/avc/cache_threshold", 29);
    res = syscall(__NR_openat, 0xffffffffffffff9c, 0x20000280, 2, 0);
    if (res != -1)
      r[0] = res;
    break;
  case 2:
    syscall(__NR_fcntl, r[0], 9);
    break;
  case 3:
    memcpy((void*)0x200d4000, "/dev/net/tun", 13);
    res = syz_open_dev(0x200d4000, 0, 0);
    if (res != -1)
      r[1] = res;
    break;
  case 4:
    memcpy((void*)0x20000140, "/dev/net/tun", 13);
    syz_open_dev(0x20000140, 0, 0x80000);
    break;
  case 5:
    memcpy((void*)0x20af1fe8, "system.posix_acl_access", 24);
    memcpy((void*)0x20c56000,
           "\x02\x00\x00\x00\x04\x00\x00\x00\x90\x74\x6e\x00", 12);
    syscall(__NR_fsetxattr, r[1], 0x20af1fe8, 0x20c56000, 0xc, 0);
    break;
  case 6:
    res = syscall(__NR_socket, 0x10, 3, 0x1f);
    if (res != -1)
      r[2] = res;
    break;
  case 7:
    syscall(__NR_mmap, 0x20000000, 0xe77000, 3, 0x32, r[2], 0);
    break;
  case 8:
    *(uint32_t*)0x20000040 = 0;
    *(uint32_t*)0x20000044 = 2;
    *(uint32_t*)0x20000048 = 0x7fffffff;
    *(uint16_t*)0x2000004c = 0;
    *(uint16_t*)0x2000004e = 0x100;
    *(uint16_t*)0x20000050 = 0xffc0;
    *(uint16_t*)0x20000052 = -1;
    *(uint32_t*)0x20000054 = 9;
    *(uint32_t*)0x20000058 = 0;
    *(uint16_t*)0x2000005c = 0xa;
    *(uint16_t*)0x2000005e = htobe16(0x4e24);
    *(uint32_t*)0x20000060 = 6;
    *(uint64_t*)0x20000064 = htobe64(0);
    *(uint64_t*)0x2000006c = htobe64(1);
    *(uint32_t*)0x20000074 = 0;
    *(uint32_t*)0x200000dc = 0x8001;
    *(uint32_t*)0x200000e0 = 6;
    *(uint32_t*)0x200000e4 = 4;
    *(uint32_t*)0x200000e8 = 0;
    *(uint32_t*)0x200000ec = 2;
    *(uint32_t*)0x20000100 = 0xb0;
    syscall(__NR_getsockopt, 0xffffff9c, 0x84, 0xe, 0x20000040, 0x20000100);
    break;
  case 9:
    syscall(__NR_ioctl, r[0], 0x4c07);
    break;
  case 10:
    *(uint32_t*)0x20000240 = 0x6e;
    syscall(__NR_accept4, -1, 0x200001c0, 0x20000240, 0x80000);
    break;
  case 11:
    syscall(__NR_setsockopt, r[1], 0x29, 0x41, 0x20000400, 1);
    break;
  case 12:
    *(uint8_t*)0x20000000 = 4;
    syscall(__NR_setsockopt, r[0], 0x84, 0x15, 0x20000000, 1);
    break;
  case 13:
    res = syscall(__NR_socket, 0xa, 2, 0);
    if (res != -1)
      r[3] = res;
    break;
  case 14:
    res = syscall(__NR_socket, 0x18, 1, 1);
    if (res != -1)
      r[4] = res;
    break;
  case 15:
    *(uint16_t*)0x20000180 = 0x18;
    *(uint32_t*)0x20000182 = 1;
    *(uint32_t*)0x20000186 = 0;
    *(uint32_t*)0x2000018a = r[3];
    *(uint16_t*)0x2000018e = 3;
    *(uint16_t*)0x20000190 = 0;
    *(uint16_t*)0x20000192 = 2;
    *(uint16_t*)0x20000194 = 0;
    *(uint16_t*)0x20000196 = 0xa;
    *(uint16_t*)0x20000198 = htobe16(0x4e21);
    *(uint32_t*)0x2000019a = 3;
    *(uint8_t*)0x2000019e = -1;
    *(uint8_t*)0x2000019f = 1;
    *(uint8_t*)0x200001a0 = 0;
    *(uint8_t*)0x200001a1 = 0;
    *(uint8_t*)0x200001a2 = 0;
    *(uint8_t*)0x200001a3 = 0;
    *(uint8_t*)0x200001a4 = 0;
    *(uint8_t*)0x200001a5 = 0;
    *(uint8_t*)0x200001a6 = 0;
    *(uint8_t*)0x200001a7 = 0;
    *(uint8_t*)0x200001a8 = 0;
    *(uint8_t*)0x200001a9 = 0;
    *(uint8_t*)0x200001aa = 0;
    *(uint8_t*)0x200001ab = 0;
    *(uint8_t*)0x200001ac = 0;
    *(uint8_t*)0x200001ad = 1;
    *(uint32_t*)0x200001ae = 4;
    syscall(__NR_connect, r[4], 0x20000180, 0x32);
    break;
  case 16:
    res = syscall(__NR_socket, 0x18, 1, 1);
    if (res != -1)
      r[5] = res;
    break;
  case 17:
    syscall(__NR_close, r[4]);
    break;
  case 18:
    syscall(__NR_dup2, r[5], r[3]);
    break;
  }
}

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

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;
}