// https://syzkaller.appspot.com/bug?id=5735d842f7ea3ed9220aca64952ac4aba7ba741c
// autogenerated by syzkaller (http://github.com/google/syzkaller)

#define _GNU_SOURCE
#include <endian.h>
#include <sys/syscall.h>
#include <unistd.h>

__attribute__((noreturn)) static void doexit(int status)
{
  volatile unsigned i;
  syscall(__NR_exit_group, status);
  for (i = 0;; i++) {
  }
}
#include <errno.h>
#include <setjmp.h>
#include <signal.h>
#include <stdarg.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <string.h>
#include <sys/stat.h>

const int kFailStatus = 67;
const int kRetryStatus = 69;

static void fail(const char* msg, ...)
{
  int e = errno;
  va_list args;
  va_start(args, msg);
  vfprintf(stderr, msg, args);
  va_end(args);
  fprintf(stderr, " (errno %d)\n", e);
  doexit((e == ENOMEM || e == EAGAIN) ? kRetryStatus : kFailStatus);
}

static __thread int skip_segv;
static __thread jmp_buf segv_env;

static void segv_handler(int sig, siginfo_t* info, void* uctx)
{
  uintptr_t addr = (uintptr_t)info->si_addr;
  const uintptr_t prog_start = 1 << 20;
  const uintptr_t prog_end = 100 << 20;
  if (__atomic_load_n(&skip_segv, __ATOMIC_RELAXED) &&
      (addr < prog_start || addr > prog_end)) {
    _longjmp(segv_env, 1);
  }
  doexit(sig);
}

static void install_segv_handler()
{
  struct sigaction sa;

  memset(&sa, 0, sizeof(sa));
  sa.sa_handler = SIG_IGN;
  syscall(SYS_rt_sigaction, 0x20, &sa, NULL, 8);
  syscall(SYS_rt_sigaction, 0x21, &sa, NULL, 8);

  memset(&sa, 0, sizeof(sa));
  sa.sa_sigaction = segv_handler;
  sa.sa_flags = SA_NODEFER | SA_SIGINFO;
  sigaction(SIGSEGV, &sa, NULL);
  sigaction(SIGBUS, &sa, NULL);
}

#define NONFAILING(...)                                                        \
  {                                                                            \
    __atomic_fetch_add(&skip_segv, 1, __ATOMIC_SEQ_CST);                       \
    if (_setjmp(segv_env) == 0) {                                              \
      __VA_ARGS__;                                                             \
    }                                                                          \
    __atomic_fetch_sub(&skip_segv, 1, __ATOMIC_SEQ_CST);                       \
  }

static void use_temporary_dir()
{
  char tmpdir_template[] = "./syzkaller.XXXXXX";
  char* tmpdir = mkdtemp(tmpdir_template);
  if (!tmpdir)
    fail("failed to mkdtemp");
  if (chmod(tmpdir, 0777))
    fail("failed to chmod");
  if (chdir(tmpdir))
    fail("failed to chdir");
}

uint64_t r[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff};
void loop()
{
  long res = 0;
  res = syscall(__NR_socket, 0x26, 5, 0);
  if (res != -1)
    r[0] = res;
  NONFAILING(*(uint16_t*)0x20ee1fa8 = 0x26);
  NONFAILING(memcpy((void*)0x20ee1faa,
                    "\x68\x61\x73\x68\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00",
                    14));
  NONFAILING(*(uint32_t*)0x20ee1fb8 = 0);
  NONFAILING(*(uint32_t*)0x20ee1fbc = 0);
  NONFAILING(memcpy((void*)0x20ee1fc0,
                    "\x63\x6d\x61\x63\x28\x63\x61\x73\x74\x35\x29\x00\x00\x00"
                    "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
                    "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
                    "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
                    "\x00\x00\x00\x00\x00\x00\x00\x00",
                    64));
  syscall(__NR_bind, r[0], 0x20ee1fa8, 0x58);
  res = syscall(__NR_accept, r[0], 0, 0);
  if (res != -1)
    r[1] = res;
  NONFAILING(memcpy((void*)0x20b78ff0, "\xa2\x33\x64\xfd\x5e", 5));
  syscall(__NR_setsockopt, r[0], 0x117, 1, 0x20b78ff0, 5);
  NONFAILING(memcpy((void*)0x204b8ff8, "./file0", 8));
  res = syscall(__NR_open, 0x204b8ff8, 0x28042, 0);
  if (res != -1)
    r[2] = res;
  syscall(__NR_fallocate, r[2], 0, 0, 0xc9);
  NONFAILING(*(uint64_t*)0x20e64ff8 = 7);
  syscall(__NR_sendfile, r[1], r[2], 0x20e64ff8, 8);
}

int main()
{
  syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0);
  install_segv_handler();
  use_temporary_dir();
  loop();
  return 0;
}