// https://syzkaller.appspot.com/bug?id=d767177245c54af614d5241159cce56995eef0db
// autogenerated by syzkaller (http://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <pthread.h>
#include <stdlib.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);
  for (;;) {
  }
}

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");
}

static void test();

void loop()
{
  while (1) {
    test();
  }
}

long r[42];
void* thr(void* arg)
{
  switch ((long)arg) {
  case 0:
    r[0] = syscall(__NR_mmap, 0x20000000ul, 0xf7d000ul, 0x3ul, 0x32ul,
                   0xfffffffffffffffful, 0x0ul);
    break;
  case 1:
    r[1] = syscall(__NR_socket, 0x26ul, 0x5ul, 0x0ul);
    break;
  case 2:
    NONFAILING(*(uint16_t*)0x20590fa8 = (uint16_t)0x26);
    NONFAILING(memcpy(
        (void*)0x20590faa,
        "\x73\x6b\x63\x69\x70\x68\x65\x72\x00\x00\x00\x00\x00\x00",
        14));
    NONFAILING(*(uint32_t*)0x20590fb8 = (uint32_t)0x0);
    NONFAILING(*(uint32_t*)0x20590fbc = (uint32_t)0x0);
    NONFAILING(memcpy((void*)0x20590fc0,
                      "\x63\x68\x61\x63\x68\x61\x32\x30\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\x00\x00\x00",
                      64));
    r[7] = syscall(__NR_bind, r[1], 0x20590fa8ul, 0x58ul);
    break;
  case 3:
    NONFAILING(memcpy((void*)0x201ec000,
                      "\x0a\x07\x75\xb0\xd5\xe3\x83\xe5\xb3\xb6\x0c\xed"
                      "\x5c\x54\xdb\xb7\x29\x5d\xf0\xdf\x82\x17\xad\x40"
                      "\x00\x00\x00\x00\x00\x00\x00\xe6",
                      32));
    r[9] = syscall(__NR_setsockopt, r[1], 0x117ul, 0x1ul, 0x201ec000ul,
                   0x20ul);
    break;
  case 4:
    r[10] = syscall(__NR_accept, r[1], 0x0ul, 0x0ul);
    break;
  case 5:
    r[11] = syscall(__NR_io_setup, 0x5ul, 0x20479000ul);
    if (r[11] != -1)
      NONFAILING(r[12] = *(uint64_t*)0x20479000);
    break;
  case 6:
    r[13] = syscall(__NR_eventfd, 0x988ul);
    break;
  case 7:
    NONFAILING(*(uint64_t*)0x20738000 = (uint64_t)0x20f73fc0);
    NONFAILING(*(uint64_t*)0x20738008 = (uint64_t)0x208e8fc0);
    NONFAILING(*(uint64_t*)0x20f73fc0 = (uint64_t)0x0);
    NONFAILING(*(uint32_t*)0x20f73fc8 = (uint32_t)0x0);
    NONFAILING(*(uint32_t*)0x20f73fcc = (uint32_t)0x0);
    NONFAILING(*(uint16_t*)0x20f73fd0 = (uint16_t)0x0);
    NONFAILING(*(uint16_t*)0x20f73fd2 = (uint16_t)0xdccf);
    NONFAILING(*(uint32_t*)0x20f73fd4 = r[10]);
    NONFAILING(*(uint64_t*)0x20f73fd8 = (uint64_t)0x2079a000);
    NONFAILING(*(uint64_t*)0x20f73fe0 = (uint64_t)0x19);
    NONFAILING(*(uint64_t*)0x20f73fe8 = (uint64_t)0x0);
    NONFAILING(*(uint64_t*)0x20f73ff0 = (uint64_t)0x0);
    NONFAILING(*(uint32_t*)0x20f73ff8 = (uint32_t)0x1);
    NONFAILING(*(uint32_t*)0x20f73ffc = r[13]);
    NONFAILING(memcpy((void*)0x2079a000, "\x16\x80\xb5\x6c\x88\xe4\x52"
                                         "\xf0\xc9\x0a\xfe\xde\x60\x61"
                                         "\xa2\x0a\x17\x1f\xd8\x6d\x1c"
                                         "\x7b\xb9\xe1\xc5",
                      25));
    NONFAILING(*(uint64_t*)0x208e8fc0 = (uint64_t)0x0);
    NONFAILING(*(uint32_t*)0x208e8fc8 = (uint32_t)0x0);
    NONFAILING(*(uint32_t*)0x208e8fcc = (uint32_t)0x0);
    NONFAILING(*(uint16_t*)0x208e8fd0 = (uint16_t)0x8);
    NONFAILING(*(uint16_t*)0x208e8fd2 = (uint16_t)0x200000000000001);
    NONFAILING(*(uint32_t*)0x208e8fd4 = r[10]);
    NONFAILING(*(uint64_t*)0x208e8fd8 = (uint64_t)0x20435035);
    NONFAILING(*(uint64_t*)0x208e8fe0 = (uint64_t)0x0);
    NONFAILING(*(uint64_t*)0x208e8fe8 = (uint64_t)0x100000000);
    NONFAILING(*(uint64_t*)0x208e8ff0 = (uint64_t)0x0);
    NONFAILING(*(uint32_t*)0x208e8ff8 = (uint32_t)0x1);
    NONFAILING(*(uint32_t*)0x208e8ffc = (uint32_t)0xffffffffffffffff);
    r[41] = syscall(__NR_io_submit, r[12], 0x2ul, 0x20738000ul);
    break;
  }
  return 0;
}

void test()
{
  long i;
  pthread_t th[16];

  memset(r, -1, sizeof(r));
  for (i = 0; i < 8; i++) {
    pthread_create(&th[i], 0, thr, (void*)i);
    usleep(rand() % 10000);
  }
  usleep(rand() % 100000);
}

int main()
{
  int i;
  for (i = 0; i < 8; i++) {
    if (fork() == 0) {
      install_segv_handler();
      use_temporary_dir();
      loop();
      return 0;
    }
  }
  sleep(1000000);
  return 0;
}