// https://syzkaller.appspot.com/bug?id=8104a8dead4f053580f41aa253534339c6c5b768
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <dirent.h>
#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <setjmp.h>
#include <signal.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/prctl.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>

#ifndef __NR_bpf
#define __NR_bpf 321
#endif

static __thread int clone_ongoing;
static __thread int skip_segv;
static __thread jmp_buf segv_env;

static void segv_handler(int sig, siginfo_t* info, void* ctx)
{
  if (__atomic_load_n(&clone_ongoing, __ATOMIC_RELAXED) != 0) {
    exit(sig);
  }
  uintptr_t addr = (uintptr_t)info->si_addr;
  const uintptr_t prog_start = 1 << 20;
  const uintptr_t prog_end = 100 << 20;
  int skip = __atomic_load_n(&skip_segv, __ATOMIC_RELAXED) != 0;
  int valid = addr < prog_start || addr > prog_end;
  if (skip && valid) {
    _longjmp(segv_env, 1);
  }
  exit(sig);
}

static void install_segv_handler(void)
{
  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(...)                                                        \
  ({                                                                           \
    int ok = 1;                                                                \
    __atomic_fetch_add(&skip_segv, 1, __ATOMIC_SEQ_CST);                       \
    if (_setjmp(segv_env) == 0) {                                              \
      __VA_ARGS__;                                                             \
    } else                                                                     \
      ok = 0;                                                                  \
    __atomic_fetch_sub(&skip_segv, 1, __ATOMIC_SEQ_CST);                       \
    ok;                                                                        \
  })

static void sleep_ms(uint64_t ms)
{
  usleep(ms * 1000);
}

static uint64_t current_time_ms(void)
{
  struct timespec ts;
  if (clock_gettime(CLOCK_MONOTONIC, &ts))
    exit(1);
  return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000;
}

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 void kill_and_wait(int pid, int* status)
{
  kill(-pid, SIGKILL);
  kill(pid, SIGKILL);
  for (int i = 0; i < 100; i++) {
    if (waitpid(-1, status, WNOHANG | __WALL) == pid)
      return;
    usleep(1000);
  }
  DIR* dir = opendir("/sys/fs/fuse/connections");
  if (dir) {
    for (;;) {
      struct dirent* ent = readdir(dir);
      if (!ent)
        break;
      if (strcmp(ent->d_name, ".") == 0 || strcmp(ent->d_name, "..") == 0)
        continue;
      char abort[300];
      snprintf(abort, sizeof(abort), "/sys/fs/fuse/connections/%s/abort",
               ent->d_name);
      int fd = open(abort, O_WRONLY);
      if (fd == -1) {
        continue;
      }
      if (write(fd, abort, 1) < 0) {
      }
      close(fd);
    }
    closedir(dir);
  } else {
  }
  while (waitpid(-1, status, __WALL) != pid) {
  }
}

static void setup_test()
{
  prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
  setpgrp();
  write_file("/proc/self/oom_score_adj", "1000");
}

static void execute_one(void);

#define WAIT_FLAGS __WALL

static void loop(void)
{
  int iter = 0;
  for (;; iter++) {
    int pid = fork();
    if (pid < 0)
      exit(1);
    if (pid == 0) {
      setup_test();
      execute_one();
      exit(0);
    }
    int status = 0;
    uint64_t start = current_time_ms();
    for (;;) {
      if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid)
        break;
      sleep_ms(1);
      if (current_time_ms() - start < 5000)
        continue;
      kill_and_wait(pid, &status);
      break;
    }
  }
}

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

void execute_one(void)
{
  intptr_t res = 0;
  NONFAILING(*(uint32_t*)0x20000340 = 2);
  NONFAILING(*(uint32_t*)0x20000344 = 4);
  NONFAILING(*(uint32_t*)0x20000348 = 8);
  NONFAILING(*(uint32_t*)0x2000034c = 1);
  NONFAILING(*(uint32_t*)0x20000350 = 0x80);
  NONFAILING(*(uint32_t*)0x20000354 = -1);
  NONFAILING(*(uint32_t*)0x20000358 = 0);
  NONFAILING(memset((void*)0x2000035c, 0, 16));
  NONFAILING(*(uint32_t*)0x2000036c = 0);
  NONFAILING(*(uint32_t*)0x20000370 = -1);
  NONFAILING(*(uint32_t*)0x20000374 = 0);
  NONFAILING(*(uint32_t*)0x20000378 = 0);
  NONFAILING(*(uint32_t*)0x2000037c = 0);
  NONFAILING(*(uint64_t*)0x20000380 = 0);
  res = syscall(__NR_bpf, /*cmd=*/0ul, /*arg=*/0x20000340ul, /*size=*/0x48ul);
  if (res != -1)
    r[0] = res;
  NONFAILING(*(uint32_t*)0x20000480 = r[0]);
  syscall(__NR_bpf, /*cmd=*/0x16ul, /*arg=*/0x20000480ul, /*size=*/4ul);
  NONFAILING(*(uint32_t*)0x200004c0 = 0x11);
  NONFAILING(*(uint32_t*)0x200004c4 = 0x18);
  NONFAILING(*(uint64_t*)0x200004c8 = 0x200001c0);
  NONFAILING(
      memcpy((void*)0x200001c0,
             "\x18\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
             "\xb7\x08\x00\x00\x00\x00\x00\x00\x7b\x8a\xf8\xff\x00\x00\x00\x00"
             "\xb7\x08\x00\x00\x00\x00\x00\x00\x7b\x8a\xf0\xff\x00\x00\x00\x00"
             "\xbf\xa1\x00\x00\x00\x00\x00\x00\x07\x01\x00\x00\xf8\xff\xff\xff"
             "\xbf\xa4\x00\x00\x00\x00\x00\x00\x07\x04\x00\x00\xf0\xff\xff\xff"
             "\xb7\x02\x00\x00\x00\x00\x00\x00\x18\x23\x00\x00",
             92));
  NONFAILING(*(uint32_t*)0x2000021c = r[0]);
  NONFAILING(memcpy(
      (void*)0x20000220,
      "\x00\x00\x00\x00\x00\x00\x00\x00\xb7\x05\x00\x00\x00\x00\x00\x00\x85\x00"
      "\x00\x00\xa5\x00\x00\x00\x18\x01\x00\x00\x20\x20\x64\x05\x00\x00\x00\x00"
      "\x00\x20\x20\x20\x7b\x1a\xf8\xff\x00\x00\x00\x00\xbf\xa1\x00\x00\x00\x00"
      "\x00\x00\x07\x01\x00\x00\xf8\xff\xff\xff\xb7\x02\x00\x00\x08\x00\x00\x00"
      "\xb7\x03\x00\x00\x00\x00\x00\x00\xa5\x00\x00\x00\x08\x00\x00\x00\x95",
      89));
  NONFAILING(*(uint64_t*)0x200004d0 = 0x20000600);
  NONFAILING(memcpy((void*)0x20000600, "GPL\000", 4));
  NONFAILING(*(uint32_t*)0x200004d8 = 0);
  NONFAILING(*(uint32_t*)0x200004dc = 0);
  NONFAILING(*(uint64_t*)0x200004e0 = 0);
  NONFAILING(*(uint32_t*)0x200004e8 = 0);
  NONFAILING(*(uint32_t*)0x200004ec = 0);
  NONFAILING(memset((void*)0x200004f0, 0, 16));
  NONFAILING(*(uint32_t*)0x20000500 = 0);
  NONFAILING(*(uint32_t*)0x20000504 = 0);
  NONFAILING(*(uint32_t*)0x20000508 = -1);
  NONFAILING(*(uint32_t*)0x2000050c = 0);
  NONFAILING(*(uint64_t*)0x20000510 = 0);
  NONFAILING(*(uint32_t*)0x20000518 = 0);
  NONFAILING(*(uint32_t*)0x2000051c = 0);
  NONFAILING(*(uint64_t*)0x20000520 = 0);
  NONFAILING(*(uint32_t*)0x20000528 = 0);
  NONFAILING(*(uint32_t*)0x2000052c = 0);
  NONFAILING(*(uint32_t*)0x20000530 = 0);
  NONFAILING(*(uint32_t*)0x20000534 = 0);
  NONFAILING(*(uint64_t*)0x20000538 = 0);
  NONFAILING(*(uint64_t*)0x20000540 = 0);
  NONFAILING(*(uint32_t*)0x20000548 = 0);
  NONFAILING(*(uint32_t*)0x2000054c = 0);
  res = syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x200004c0ul, /*size=*/0x90ul);
  if (res != -1)
    r[1] = res;
  NONFAILING(*(uint64_t*)0x200001c0 = 0x20000440);
  NONFAILING(memcpy((void*)0x20000440, "kfree\000", 6));
  NONFAILING(*(uint32_t*)0x200001c8 = r[1]);
  syscall(__NR_bpf, /*cmd=*/0x11ul, /*arg=*/0x200001c0ul, /*size=*/0x10ul);
  NONFAILING(*(uint32_t*)0x20000000 = 1);
  NONFAILING(*(uint32_t*)0x20000004 = 8);
  NONFAILING(*(uint64_t*)0x20000008 = 0x20002200);
  NONFAILING(memcpy(
      (void*)0x20002200,
      "\x7a\x0a\xf8\xff\x75\x25\x73\x7c\xbf\xa1\x00\x00\x00\x00\x00\x00\x07\x01"
      "\x00\x00\xf8\xff\xff\xff\xb7\x02\x00\x00\x05\x00\x00\x00\xbf\x13\x00\x00"
      "\x00\x00\x00\x00\x85\x00\x00\x00\x06\x00\x00\x00\xb7\x00\x00\x00\x00\x00"
      "\x00\x00\x95\x00\x00\xf7\x00\x00\x00\x00\xb2\x59\x52\x85\xfa\x97\xea\xd0"
      "\x16\x91\x91\xd5\x4f\x81\x96\x21\x7f\xc5\x63\xe2\xfc\x91\xf6\xda\x4d\xad"
      "\x4f\x00\x78\xb1\xb5\x95\x6f\xc4\xa3\xf6\x11\xa7\xc8\x00\x00\x04\x00\x00"
      "\x00\x00\x00\xb1\xa2\x97\xcf\xdd\xd7\x3f\x30\xf2\x38\x2f\x6c\x2d\x3f\xfd"
      "\xd4\x5b\xe5\x83\x82\x3c\x0f\x09\x22\x48\xa5\x7d\x48\x62\x1f\x3c\x1c\x65"
      "\xee\x19\xee\x87\x5d\xaf\x45\x03\x00\x00\x00\xa5\xe1\x5b\x2f\x96\x18\xd5"
      "\x47\x24\x4a\x22\x00\x00\x00\x00\x08\x00\xdb\x58\x36\x20\xce\x72\x43\xd1"
      "\xae\xbd\xb6\x38\xd9\x1d\xbe\xf6\x61\x93\x58\x39\x9a\xa9\xc2\xac\xd0\x68"
      "\xc0\x3e\xfe\xfd\x8b\xc7\x7e\xdf\x2d\x34\xb1\x2c\xd4\x8a\x1b\x20\xfb\x7d"
      "\xd8\x43\x26\x7e\x03\x31\x75\x9f\x4e\xc6\xb5\xb0\xaf\x58\xe6\x04\xf4\x94"
      "\xef\xf2\x89\x02\x6d\x50\x45\xef\x08\x00\x00\x00\x00\x00\x00\x00\x77\x18"
      "\xa0\x9f\x48\x86\xaf\xc2\x6a\xbb\xa3\x46\x35\xd0\xe8\xb5\x98\xa5\x1b\xc7"
      "\x42\x13\x5a\x6e\x1d\x33\xfe\x22\x6c\x94\x4b\xc7\x0b\xb3\x0d\x43\x5a\xa8"
      "\xb5\x20\x2d\xb7\x61\x01\x4b\x1b\x99\x9a\x12\xdf\x6b\xee\x43\x1a\x66\x81"
      "\x00\x00\x00\x26\x3b\x62\x33\xe1\xc0\xfe\x30\xe3\x84\xc3\xcb\x07\xb7\x4a"
      "\x72\x29\x1a\x1a\x2b\x52\x3d\xd8\x1b\x66\x51\xb1\xee\x48\xe9\x99\xbb\x00"
      "\x48\x23\xeb\xcd\x8c\x65\x74\x3f\x31\xf8\x4b\x26\x3a\xb9\xb3\x42\x66\x92"
      "\xd0\x1a\xd1\x94\xf3\x02\xd7\xa6\x58\xe9\x00\x00\x00\x00\x01\x00\x00\x00"
      "\xb6\xb2\xf2\x5d\xdb\x8c\x64\x0a\xb3\x21\xa4\x02\x05\x8c\x92\xcd\xfb\xea"
      "\x88\x2b\x0b\x18\x91\xac\x21\xb6\x87\x08\x14\xcf\x4e\xe2\x3d\xdb\x79\xff"
      "\xf5\xeb\x15\x6e\x0a\x00\x00\x00\x00\x00\x00\xf2\xbd\x16\x4a\x17\x8d\x86"
      "\xd6\x93\x5e\xb8\xb7\x5b\xc4\xeb\x68\x0d\x10\xe8\xb6\xa5\x4c\x6c\x86\x74"
      "\xca\xf6\x3f\xf7\x66\x22\x93\x9a\x20\xd4\xaa\xdf\x85\xdb\x40\x17\x9c\x2c"
      "\xf8\x3e\xe0\x7e\x30\xa2\x79\xd8\xf9\xf3\xbc\x28\x2d\xeb\x43\xa0\x34\x09"
      "\xf8\xe6\x97\x2f\x3f\x72\x0d\x04\x59\x23\x70\x2c\xed\xe0\xf3\xe9\x14\x11"
      "\xf3\xf1\xb1\x6f\x06\x56\x24\xf2\x80\xa7\xdc\xce\x8d\xb9\x10\xf9\x3c\x49"
      "\xb9\xe0\xaa\x39\x0d\x0d\xa6\x97\x2e\xd7\x19\xd7\xe0\xef\xb2\xbb\x71\x3d"
      "\x18\x90\xe3\x17\xc8\xde\x10\x5c\x39\x33\xfd\x5d\x5b\xf3\x8f\x6b\x9f\xc3"
      "\x9f\xc8\x29\xdc\xfe\x4a\xf8\xac\x5f\xbb\x73\x14\xa7\xa4\x33\xe0\x18\x27"
      "\x67\xd1\x37\x6e\xda\x2b\x9c\x66\x20\x03\x49\xe6\x2d\x4d\x0a\xb1\xa1\xdc"
      "\x51\x90\x7c\x98\x00\x00\x00\x00\xa8\x57\xd6\x1b\x0d\x66\xc3\xf6\xda\x8a"
      "\xed\x31\x02\x7c\x33\x20\x4e\xa0\xfa\x06\x20\x11\x19\x20\xd3\xf2\x49\x80"
      "\xe9\x99\x5a\x51\x0b\xd8\x7b\x06\x44\x0a\x0a\x26\x13\x00\x98\xb9\x01\xc5"
      "\x3a\x02\xcf\xbf\xd8\xbc\xbd\xec\x9f\x34\x54\x2c\x3c\x96\x52\xad\xef\xde"
      "\x55\x5e\xcd\x28\xeb\xc8\x80\x82\xba\xb4\x31\xee\x3e\x1a\xdb\x5b\x0a\xd1"
      "\x4c\x79\xdd\x44\x11\xec\xc9\x6c\x51\x2f\x3b\x72\xa9\xb3\xa0\xc3\xe0\x7e"
      "\xc6\xb4\x27\xbd\xc0\xbf\x39\x63\xe9\xf8\x02\xa5\xfe\xab\x82\xa9\x89\xdb"
      "\x62\xd8\xd1\x33\x9f\x84\x2b\x3f\x59\x3d\x6c\x24\xfe\x01\x5e\xc6\x3c\x65"
      "\x8b\xa7\xc4\xfa\xe1\x75\x14\xf8\x02\x70\x9a\xb4\xfa\x5c\xaa\x93\x2d\x4b"
      "\x65\xa5\xec\xfc\x42\x28\x99\x51\x3d\xdd\xe6\xec\x04\x97\x4f\x99\x81\xa8"
      "\xc1\x55\x00\x00\x00\x00\x00\x00\x00\x00\x97\xd6\xe0\x11\x73\x31\x28\xcb"
      "\x37\xb1\xce\xd7\x85\xe4\x72\x68\x23\xe5\xa4\x6e\x87\x60\x08\x6c\x63\x9b"
      "\x8d\xc9\xb0\xcb\x5f\xa8\x3a\x7f\x75\x4d\xfc\x5e\xaf\xdc\xc8\x2d\x29\x84"
      "\x3c\x75\x33\x81\xf7\x52\x6c\x9a\xe5\x30\x52\xa2\x27\x47\x8c\xa5\x7f\x06"
      "\x0d\x57\x3b\x92\x25\xe1\x46\x38\x69\x9c\x7c\xfa\xdb\xd7\x8a\x90\xde\x75"
      "\x2a\xb7\xd5\x40\xe1\x78\xfe\xff\x2c\xac\x75\x73\xc4\x35\xf7\x19\xb3\x4a"
      "\xbe\x5a\x5d\x70\xc2\xd7\xbc\xf7\xde\xf2\x5c\xa9\x9c\x15\x53\xac\x8a\xcc"
      "\x6e\x6d\x54\xaa\x69\x7d\xa5\xc5\xf5\x93\x06\x67\xb4\x52\x53\x15\x31\xad"
      "\x31\x88\xcb\xd2\x0e\x3a\x7b\xaf\x1f\x71\x18\x76\x53\xc8\x8e\x7f\xba\x2b"
      "\x81\xb9\x59\x66\x70\x49\xcc\x52\x04\x7c\x27\xef\xac\x9a\x88\xa8\x17\xf0"
      "\xfc\x21\x0a\x52\x06\x0e\x61\xad\x2f\xed\xce\x1b\x11\xf6\xeb\xfc\x22\x2d"
      "\xe9\x66\xaa\x4c\x1d\xfb\x67\xe2\x88\x41\x4c\xb5\x3c\x4a\xa3\x01\x77\x5f"
      "\xeb\xef\x9e\xe0\x35\x61\x8b\x52\xb2\xae\x7a\xd0\xfd\x32\x23\xd4\x81\x10"
      "\x62\x72\xd8\x84\x99\x37\xe4\x64\x20\xab\x38\x33\x2c\x5c\x18\xe5\x6d\x91"
      "\x00\x00\x00\x00\x00\x00\x00",
      1033));
  NONFAILING(*(uint64_t*)0x20000010 = 0x20000100);
  NONFAILING(memcpy((void*)0x20000100, "GPL\000", 4));
  NONFAILING(*(uint32_t*)0x20000018 = 0);
  NONFAILING(*(uint32_t*)0x2000001c = 0);
  NONFAILING(*(uint64_t*)0x20000020 = 0);
  NONFAILING(*(uint32_t*)0x20000028 = 0);
  NONFAILING(*(uint32_t*)0x2000002c = 0);
  NONFAILING(memset((void*)0x20000030, 0, 16));
  NONFAILING(*(uint32_t*)0x20000040 = 0);
  NONFAILING(*(uint32_t*)0x20000044 = 0);
  NONFAILING(*(uint32_t*)0x20000048 = -1);
  NONFAILING(*(uint32_t*)0x2000004c = 8);
  NONFAILING(*(uint64_t*)0x20000050 = 0);
  NONFAILING(*(uint32_t*)0x20000058 = 0);
  NONFAILING(*(uint32_t*)0x2000005c = 0x10);
  NONFAILING(*(uint64_t*)0x20000060 = 0);
  NONFAILING(*(uint32_t*)0x20000068 = 0);
  NONFAILING(*(uint32_t*)0x2000006c = 0);
  NONFAILING(*(uint32_t*)0x20000070 = -1);
  NONFAILING(*(uint32_t*)0x20000074 = 0);
  NONFAILING(*(uint64_t*)0x20000078 = 0);
  NONFAILING(*(uint64_t*)0x20000080 = 0);
  NONFAILING(*(uint32_t*)0x20000088 = 0x10);
  NONFAILING(*(uint32_t*)0x2000008c = 0);
  res = syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x20000000ul, /*size=*/0x48ul);
  if (res != -1)
    r[2] = res;
  NONFAILING(*(uint32_t*)0x20000080 = r[2]);
  NONFAILING(*(uint32_t*)0x20000084 = 0x2000000);
  NONFAILING(*(uint32_t*)0x20000088 = 0xe);
  NONFAILING(*(uint32_t*)0x2000008c = 0x55);
  NONFAILING(*(uint64_t*)0x20000090 = 0x20000140);
  NONFAILING(memcpy((void*)0x20000140,
                    "\xa0\x6a\xd8\x76\xd5\x6a\x00\x64\xd0\x82\x77\x8c\x39\x38",
                    14));
  NONFAILING(*(uint64_t*)0x20000098 = 0x20000380);
  NONFAILING(*(uint32_t*)0x200000a0 = 0xa00);
  NONFAILING(*(uint32_t*)0x200000a4 = 0x4000000);
  NONFAILING(*(uint32_t*)0x200000a8 = 0);
  NONFAILING(*(uint32_t*)0x200000ac = 0x7000000);
  NONFAILING(*(uint64_t*)0x200000b0 = 0x20000000);
  NONFAILING(*(uint64_t*)0x200000b8 = 0x20000000);
  NONFAILING(*(uint32_t*)0x200000c0 = 0);
  NONFAILING(*(uint32_t*)0x200000c4 = 0);
  NONFAILING(*(uint32_t*)0x200000c8 = 0);
  syscall(__NR_bpf, /*cmd=*/0xaul, /*arg=*/0x20000080ul, /*size=*/0x28ul);
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1,
          /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0x1000000ul,
          /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1,
          /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x21000000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1,
          /*offset=*/0ul);
  install_segv_handler();
  loop();
  return 0;
}