// https://syzkaller.appspot.com/bug?id=987533394eda5f97c1e30b2a5346b6c3b452d5ac
// 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>

#ifndef __NR_memfd_create
#define __NR_memfd_create 319
#endif

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);
  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[1] = {0xffffffffffffffff};

int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=*/0x32ul, /*fd=*/-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0x1000000ul, /*prot=*/7ul,
          /*flags=*/0x32ul, /*fd=*/-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x21000000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=*/0x32ul, /*fd=*/-1, /*offset=*/0ul);
  setup_fault();
  intptr_t res = 0;
  memcpy(
      (void*)0x20000040,
      "\\)"
      "\200\232\202\262\343\352n\271\177\203m\200\252\256\271\005p\307\"nT\266-"
      "\345\231\006Z\327ue\272\370\204\3673\331\235)6L\261\224`\302L\206\332,E,"
      "`\375\213j\rA\265\002&\220?\006P\v+}"
      "\275\201t\037\230T\363\230E\202\315o\020\'\233\261\020ya\320\275\252h`"
      "\336\030O\343L\2315\251F\345p\016\312O\265\034\243\377(3\3438K\340\307O@"
      ".\373\204h\\\001:U\203\005\25287\376\016\211\211-"
      "dL\245\204\352\035N\347\220\216\224\327j\2733\212W\241@\022\313,"
      "\227\244C\271J\360\215ih\255Y\306\360\002t\360\225\312A;"
      "\346\261\364\204\030\363M\316Lq[<\025\270\340\2101\317\276\315\301\271}"
      "\367\306_8{\367\334K38M\370\377",
      215);
  res = syscall(__NR_memfd_create, /*name=*/0x20000040ul, /*flags=*/0ul);
  if (res != -1)
    r[0] = res;
  syscall(__NR_mmap, /*addr=*/0x20ffd000ul, /*len=*/0x1ffffful, /*prot=*/0ul,
          /*flags=*/0x12ul, /*fd=*/r[0], /*offset=*/0ul);
  inject_fault(4);
  syscall(__NR_mmap, /*addr=*/0x20ffd000ul, /*len=*/0x3000ul, /*prot=*/0ul,
          /*flags=*/0x12ul, /*fd=*/r[0], /*offset=*/0ul);
  return 0;
}