// https://syzkaller.appspot.com/bug?id=bda1a87bea05a9072003e6447c44b03ca1492b1c
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <unistd.h>

static long syz_open_pts(long a0, long a1)
{
  int ptyno = 0;
  if (ioctl(a0, TIOCGPTN, &ptyno))
    return -1;
  char buf[128];
  sprintf(buf, "/dev/pts/%d", ptyno);
  return open(buf, a1, 0);
}

static bool write_file(const char* file, const char* what, ...)
{
  char buf[1024];
  va_list args;
  va_start(args, what);
  vsnprintf(buf, sizeof(buf), what, args);
  va_end(args);
  buf[sizeof(buf) - 1] = 0;
  int len = strlen(buf);
  int fd = open(file, O_WRONLY | O_CLOEXEC);
  if (fd == -1)
    return false;
  if (write(fd, buf, len) != len) {
    int err = errno;
    close(fd);
    errno = err;
    return false;
  }
  close(fd);
  return true;
}

static int inject_fault(int nth)
{
  int fd;
  char buf[16];
  fd = open("/proc/thread-self/fail-nth", O_RDWR);
  if (fd == -1)
    exit(1);
  sprintf(buf, "%d", nth + 1);
  if (write(fd, buf, strlen(buf)) != (ssize_t)strlen(buf))
    exit(1);
  return fd;
}

uint64_t r[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff};

int main(void)
{
  syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0);
  long res = 0;
  res = syscall(__NR_socketpair, 1, 5, 0, 0x20000140);
  if (res != -1)
    r[0] = *(uint32_t*)0x20000144;
  syscall(__NR_ioctl, r[0], 0x8912, 0x400200);
  memcpy((void*)0x20000100, "/dev/ptmx", 10);
  res = syscall(__NR_openat, 0xffffffffffffff9c, 0x20000100, 0, 0);
  if (res != -1)
    r[1] = res;
  *(uint32_t*)0x20000080 = 0x208;
  *(uint32_t*)0x20000084 = 0;
  *(uint32_t*)0x20000088 = 0;
  *(uint32_t*)0x2000008c = 0x3ff;
  *(uint8_t*)0x20000090 = 0;
  *(uint8_t*)0x20000091 = 0;
  *(uint8_t*)0x20000092 = 0;
  *(uint8_t*)0x20000093 = 0;
  *(uint32_t*)0x20000094 = 0;
  *(uint32_t*)0x20000098 = 0;
  *(uint32_t*)0x2000009c = 0;
  *(uint32_t*)0x200000a0 = 0;
  syscall(__NR_ioctl, r[1], 0x5402, 0x20000080);
  *(uint32_t*)0x203b9fdc = 0;
  *(uint32_t*)0x203b9fe0 = 0;
  *(uint32_t*)0x203b9fe4 = 0;
  *(uint32_t*)0x203b9fe8 = 0;
  *(uint8_t*)0x203b9fec = 0;
  *(uint8_t*)0x203b9fed = 0;
  *(uint8_t*)0x203b9fee = 0;
  *(uint8_t*)0x203b9fef = 0;
  *(uint32_t*)0x203b9ff0 = 0;
  *(uint32_t*)0x203b9ff4 = 0;
  *(uint32_t*)0x203b9ff8 = 0;
  *(uint32_t*)0x203b9ffc = 0;
  syscall(__NR_ioctl, r[1], 0x40045431, 0x203b9fdc);
  res = syz_open_pts(r[1], 0);
  if (res != -1)
    r[2] = res;
  *(uint32_t*)0x20000040 = 0;
  *(uint32_t*)0x20000044 = 0;
  *(uint32_t*)0x20000048 = 0;
  *(uint32_t*)0x2000004c = 0;
  *(uint8_t*)0x20000050 = 0;
  *(uint8_t*)0x20000051 = 0;
  *(uint8_t*)0x20000052 = 0;
  *(uint8_t*)0x20000053 = 0;
  *(uint32_t*)0x20000054 = 0;
  *(uint32_t*)0x20000058 = 0;
  *(uint32_t*)0x2000005c = 0;
  *(uint32_t*)0x20000060 = 0;
  write_file("/sys/kernel/debug/failslab/ignore-gfp-wait", "N");
  write_file("/sys/kernel/debug/fail_futex/ignore-private", "N");
  inject_fault(0);
  syscall(__NR_ioctl, r[2], 0x5412, 0x20000040);
  return 0;
}