// https://syzkaller.appspot.com/bug?id=e9f5a6621c5d7c75b6e4b9dcdb8116fa4911f5de
// 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/stat.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <unistd.h>

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

static void setup_fault()
{
  static struct {
    const char* file;
    const char* val;
    bool fatal;
  } files[] = {
      {"/sys/kernel/debug/failslab/ignore-gfp-wait", "N", true},
      {"/sys/kernel/debug/fail_futex/ignore-private", "N", false},
      {"/sys/kernel/debug/fail_page_alloc/ignore-gfp-highmem", "N", false},
      {"/sys/kernel/debug/fail_page_alloc/ignore-gfp-wait", "N", false},
      {"/sys/kernel/debug/fail_page_alloc/min-order", "0", false},
  };
  unsigned i;
  for (i = 0; i < sizeof(files) / sizeof(files[0]); i++) {
    if (!write_file(files[i].file, files[i].val)) {
      if (files[i].fatal)
        exit(1);
    }
  }
}

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

int main(void)
{
  syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0);
  setup_fault();
  intptr_t res = 0;
  res = syscall(__NR_pipe, 0x200000c0);
  if (res != -1) {
    r[0] = *(uint32_t*)0x200000c0;
    r[1] = *(uint32_t*)0x200000c4;
  }
  *(uint32_t*)0x20000200 = -1;
  syscall(__NR_write, r[1], 0x20000200, 4);
  syscall(__NR_close, r[1]);
  res = syscall(__NR_socket, 0xa, 1, 0);
  if (res != -1)
    r[2] = res;
  *(uint32_t*)0x200000c0 = 1;
  syscall(__NR_setsockopt, r[2], 6, 0x13, 0x200000c0, 4);
  *(uint16_t*)0x20000140 = 0xa;
  *(uint16_t*)0x20000142 = htobe16(0);
  *(uint32_t*)0x20000144 = htobe32(0);
  memcpy((void*)0x20000148,
         "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000",
         16);
  *(uint32_t*)0x20000158 = 0;
  syscall(__NR_connect, r[2], 0x20000140, 0x1c);
  memcpy((void*)0x20000040, "tls\000", 4);
  syscall(__NR_setsockopt, r[2], 6, 0x1f, 0x20000040, 0x355);
  *(uint16_t*)0x20000a40 = 0x303;
  *(uint16_t*)0x20000a42 = 0x33;
  memcpy((void*)0x20000a44, "\x65\x8b\xdc\xe8\xf1\x6b\x69\x01", 8);
  memcpy((void*)0x20000a4c,
         "\x9f\xae\x19\x47\xfe\x62\x57\x6d\x6d\x75\x73\xc5\x5f\x79\x5e\x68",
         16);
  memcpy((void*)0x20000a5c, "\xa4\x3c\xc8\x0d", 4);
  memcpy((void*)0x20000a60, "\xca\x90\xbc\x29\xc8\xf9\x1c\xf6", 8);
  syscall(__NR_setsockopt, r[1], 0x11a, 1, 0x20000a40, 0x28);
  inject_fault(1);
  syscall(__NR_splice, r[0], 0, r[1], 0, 0x100000000, 0);
  return 0;
}