// https://syzkaller.appspot.com/bug?id=5e99cfa130881a8414b6672f45dbeda75b3c4f45
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <dirent.h>
#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <pthread.h>
#include <sched.h>
#include <signal.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/epoll.h>
#include <sys/ioctl.h>
#include <sys/mount.h>
#include <sys/prctl.h>
#include <sys/resource.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/uio.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>

#include <linux/capability.h>
#include <linux/rfkill.h>

static unsigned long long procid;

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 void use_temporary_dir(void)
{
  char tmpdir_template[] = "./syzkaller.XXXXXX";
  char* tmpdir = mkdtemp(tmpdir_template);
  if (!tmpdir)
    exit(1);
  if (chmod(tmpdir, 0777))
    exit(1);
  if (chdir(tmpdir))
    exit(1);
}

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;
}

#define MAX_FDS 30

#define BTPROTO_HCI 1
#define ACL_LINK 1
#define SCAN_PAGE 2

typedef struct {
  uint8_t b[6];
} __attribute__((packed)) bdaddr_t;

#define HCI_COMMAND_PKT 1
#define HCI_EVENT_PKT 4
#define HCI_VENDOR_PKT 0xff

struct hci_command_hdr {
  uint16_t opcode;
  uint8_t plen;
} __attribute__((packed));

struct hci_event_hdr {
  uint8_t evt;
  uint8_t plen;
} __attribute__((packed));

#define HCI_EV_CONN_COMPLETE 0x03
struct hci_ev_conn_complete {
  uint8_t status;
  uint16_t handle;
  bdaddr_t bdaddr;
  uint8_t link_type;
  uint8_t encr_mode;
} __attribute__((packed));

#define HCI_EV_CONN_REQUEST 0x04
struct hci_ev_conn_request {
  bdaddr_t bdaddr;
  uint8_t dev_class[3];
  uint8_t link_type;
} __attribute__((packed));

#define HCI_EV_REMOTE_FEATURES 0x0b
struct hci_ev_remote_features {
  uint8_t status;
  uint16_t handle;
  uint8_t features[8];
} __attribute__((packed));

#define HCI_EV_CMD_COMPLETE 0x0e
struct hci_ev_cmd_complete {
  uint8_t ncmd;
  uint16_t opcode;
} __attribute__((packed));

#define HCI_OP_WRITE_SCAN_ENABLE 0x0c1a

#define HCI_OP_READ_BUFFER_SIZE 0x1005
struct hci_rp_read_buffer_size {
  uint8_t status;
  uint16_t acl_mtu;
  uint8_t sco_mtu;
  uint16_t acl_max_pkt;
  uint16_t sco_max_pkt;
} __attribute__((packed));

#define HCI_OP_READ_BD_ADDR 0x1009
struct hci_rp_read_bd_addr {
  uint8_t status;
  bdaddr_t bdaddr;
} __attribute__((packed));

#define HCI_EV_LE_META 0x3e
struct hci_ev_le_meta {
  uint8_t subevent;
} __attribute__((packed));

#define HCI_EV_LE_CONN_COMPLETE 0x01
struct hci_ev_le_conn_complete {
  uint8_t status;
  uint16_t handle;
  uint8_t role;
  uint8_t bdaddr_type;
  bdaddr_t bdaddr;
  uint16_t interval;
  uint16_t latency;
  uint16_t supervision_timeout;
  uint8_t clk_accurancy;
} __attribute__((packed));

struct hci_dev_req {
  uint16_t dev_id;
  uint32_t dev_opt;
};

struct vhci_vendor_pkt_request {
  uint8_t type;
  uint8_t opcode;
} __attribute__((packed));

struct vhci_pkt {
  uint8_t type;
  union {
    struct {
      uint8_t opcode;
      uint16_t id;
    } __attribute__((packed)) vendor_pkt;
    struct hci_command_hdr command_hdr;
  };
} __attribute__((packed));

#define HCIDEVUP _IOW('H', 201, int)
#define HCISETSCAN _IOW('H', 221, int)

static int vhci_fd = -1;

static void rfkill_unblock_all()
{
  int fd = open("/dev/rfkill", O_WRONLY);
  if (fd < 0)
    exit(1);
  struct rfkill_event event = {0};
  event.idx = 0;
  event.type = RFKILL_TYPE_ALL;
  event.op = RFKILL_OP_CHANGE_ALL;
  event.soft = 0;
  event.hard = 0;
  if (write(fd, &event, sizeof(event)) < 0)
    exit(1);
  close(fd);
}

static void hci_send_event_packet(int fd, uint8_t evt, void* data,
                                  size_t data_len)
{
  struct iovec iv[3];
  struct hci_event_hdr hdr;
  hdr.evt = evt;
  hdr.plen = data_len;
  uint8_t type = HCI_EVENT_PKT;
  iv[0].iov_base = &type;
  iv[0].iov_len = sizeof(type);
  iv[1].iov_base = &hdr;
  iv[1].iov_len = sizeof(hdr);
  iv[2].iov_base = data;
  iv[2].iov_len = data_len;
  if (writev(fd, iv, sizeof(iv) / sizeof(struct iovec)) < 0)
    exit(1);
}

static void hci_send_event_cmd_complete(int fd, uint16_t opcode, void* data,
                                        size_t data_len)
{
  struct iovec iv[4];
  struct hci_event_hdr hdr;
  hdr.evt = HCI_EV_CMD_COMPLETE;
  hdr.plen = sizeof(struct hci_ev_cmd_complete) + data_len;
  struct hci_ev_cmd_complete evt_hdr;
  evt_hdr.ncmd = 1;
  evt_hdr.opcode = opcode;
  uint8_t type = HCI_EVENT_PKT;
  iv[0].iov_base = &type;
  iv[0].iov_len = sizeof(type);
  iv[1].iov_base = &hdr;
  iv[1].iov_len = sizeof(hdr);
  iv[2].iov_base = &evt_hdr;
  iv[2].iov_len = sizeof(evt_hdr);
  iv[3].iov_base = data;
  iv[3].iov_len = data_len;
  if (writev(fd, iv, sizeof(iv) / sizeof(struct iovec)) < 0)
    exit(1);
}

static bool process_command_pkt(int fd, char* buf, ssize_t buf_size)
{
  struct hci_command_hdr* hdr = (struct hci_command_hdr*)buf;
  if (buf_size < (ssize_t)sizeof(struct hci_command_hdr) ||
      hdr->plen != buf_size - sizeof(struct hci_command_hdr))
    exit(1);
  switch (hdr->opcode) {
  case HCI_OP_WRITE_SCAN_ENABLE: {
    uint8_t status = 0;
    hci_send_event_cmd_complete(fd, hdr->opcode, &status, sizeof(status));
    return true;
  }
  case HCI_OP_READ_BD_ADDR: {
    struct hci_rp_read_bd_addr rp = {0};
    rp.status = 0;
    memset(&rp.bdaddr, 0xaa, 6);
    hci_send_event_cmd_complete(fd, hdr->opcode, &rp, sizeof(rp));
    return false;
  }
  case HCI_OP_READ_BUFFER_SIZE: {
    struct hci_rp_read_buffer_size rp = {0};
    rp.status = 0;
    rp.acl_mtu = 1021;
    rp.sco_mtu = 96;
    rp.acl_max_pkt = 4;
    rp.sco_max_pkt = 6;
    hci_send_event_cmd_complete(fd, hdr->opcode, &rp, sizeof(rp));
    return false;
  }
  }
  char dummy[0xf9] = {0};
  hci_send_event_cmd_complete(fd, hdr->opcode, dummy, sizeof(dummy));
  return false;
}

static void* event_thread(void* arg)
{
  while (1) {
    char buf[1024] = {0};
    ssize_t buf_size = read(vhci_fd, buf, sizeof(buf));
    if (buf_size < 0)
      exit(1);
    if (buf_size > 0 && buf[0] == HCI_COMMAND_PKT) {
      if (process_command_pkt(vhci_fd, buf + 1, buf_size - 1))
        break;
    }
  }
  return NULL;
}
#define HCI_HANDLE_1 200
#define HCI_HANDLE_2 201

#define HCI_PRIMARY 0
#define HCI_OP_RESET 0x0c03

static void initialize_vhci()
{
  int hci_sock = socket(AF_BLUETOOTH, SOCK_RAW, BTPROTO_HCI);
  if (hci_sock < 0)
    exit(1);
  vhci_fd = open("/dev/vhci", O_RDWR);
  if (vhci_fd == -1)
    exit(1);
  const int kVhciFd = 202;
  if (dup2(vhci_fd, kVhciFd) < 0)
    exit(1);
  close(vhci_fd);
  vhci_fd = kVhciFd;
  struct vhci_vendor_pkt_request vendor_pkt_req = {HCI_VENDOR_PKT, HCI_PRIMARY};
  if (write(vhci_fd, &vendor_pkt_req, sizeof(vendor_pkt_req)) !=
      sizeof(vendor_pkt_req))
    exit(1);
  struct vhci_pkt vhci_pkt;
  if (read(vhci_fd, &vhci_pkt, sizeof(vhci_pkt)) != sizeof(vhci_pkt))
    exit(1);
  if (vhci_pkt.type == HCI_COMMAND_PKT &&
      vhci_pkt.command_hdr.opcode == HCI_OP_RESET) {
    char response[1] = {0};
    hci_send_event_cmd_complete(vhci_fd, HCI_OP_RESET, response,
                                sizeof(response));
    if (read(vhci_fd, &vhci_pkt, sizeof(vhci_pkt)) != sizeof(vhci_pkt))
      exit(1);
  }
  if (vhci_pkt.type != HCI_VENDOR_PKT)
    exit(1);
  int dev_id = vhci_pkt.vendor_pkt.id;
  pthread_t th;
  if (pthread_create(&th, NULL, event_thread, NULL))
    exit(1);
  int ret = ioctl(hci_sock, HCIDEVUP, dev_id);
  if (ret) {
    if (errno == ERFKILL) {
      rfkill_unblock_all();
      ret = ioctl(hci_sock, HCIDEVUP, dev_id);
    }
    if (ret && errno != EALREADY)
      exit(1);
  }
  struct hci_dev_req dr = {0};
  dr.dev_id = dev_id;
  dr.dev_opt = SCAN_PAGE;
  if (ioctl(hci_sock, HCISETSCAN, &dr))
    exit(1);
  struct hci_ev_conn_request request;
  memset(&request, 0, sizeof(request));
  memset(&request.bdaddr, 0xaa, 6);
  *(uint8_t*)&request.bdaddr.b[5] = 0x10;
  request.link_type = ACL_LINK;
  hci_send_event_packet(vhci_fd, HCI_EV_CONN_REQUEST, &request,
                        sizeof(request));
  struct hci_ev_conn_complete complete;
  memset(&complete, 0, sizeof(complete));
  complete.status = 0;
  complete.handle = HCI_HANDLE_1;
  memset(&complete.bdaddr, 0xaa, 6);
  *(uint8_t*)&complete.bdaddr.b[5] = 0x10;
  complete.link_type = ACL_LINK;
  complete.encr_mode = 0;
  hci_send_event_packet(vhci_fd, HCI_EV_CONN_COMPLETE, &complete,
                        sizeof(complete));
  struct hci_ev_remote_features features;
  memset(&features, 0, sizeof(features));
  features.status = 0;
  features.handle = HCI_HANDLE_1;
  hci_send_event_packet(vhci_fd, HCI_EV_REMOTE_FEATURES, &features,
                        sizeof(features));
  struct {
    struct hci_ev_le_meta le_meta;
    struct hci_ev_le_conn_complete le_conn;
  } le_conn;
  memset(&le_conn, 0, sizeof(le_conn));
  le_conn.le_meta.subevent = HCI_EV_LE_CONN_COMPLETE;
  memset(&le_conn.le_conn.bdaddr, 0xaa, 6);
  *(uint8_t*)&le_conn.le_conn.bdaddr.b[5] = 0x11;
  le_conn.le_conn.role = 1;
  le_conn.le_conn.handle = HCI_HANDLE_2;
  hci_send_event_packet(vhci_fd, HCI_EV_LE_META, &le_conn, sizeof(le_conn));
  pthread_join(th, NULL);
  close(hci_sock);
}

static void setup_gadgetfs();
static void setup_binderfs();
static void setup_fusectl();
static void sandbox_common_mount_tmpfs(void)
{
  write_file("/proc/sys/fs/mount-max", "100000");
  if (mkdir("./syz-tmp", 0777))
    exit(1);
  if (mount("", "./syz-tmp", "tmpfs", 0, NULL))
    exit(1);
  if (mkdir("./syz-tmp/newroot", 0777))
    exit(1);
  if (mkdir("./syz-tmp/newroot/dev", 0700))
    exit(1);
  unsigned bind_mount_flags = MS_BIND | MS_REC | MS_PRIVATE;
  if (mount("/dev", "./syz-tmp/newroot/dev", NULL, bind_mount_flags, NULL))
    exit(1);
  if (mkdir("./syz-tmp/newroot/proc", 0700))
    exit(1);
  if (mount("syz-proc", "./syz-tmp/newroot/proc", "proc", 0, NULL))
    exit(1);
  if (mkdir("./syz-tmp/newroot/selinux", 0700))
    exit(1);
  const char* selinux_path = "./syz-tmp/newroot/selinux";
  if (mount("/selinux", selinux_path, NULL, bind_mount_flags, NULL)) {
    if (errno != ENOENT)
      exit(1);
    if (mount("/sys/fs/selinux", selinux_path, NULL, bind_mount_flags, NULL) &&
        errno != ENOENT)
      exit(1);
  }
  if (mkdir("./syz-tmp/newroot/sys", 0700))
    exit(1);
  if (mount("/sys", "./syz-tmp/newroot/sys", 0, bind_mount_flags, NULL))
    exit(1);
  if (mount("/sys/kernel/debug", "./syz-tmp/newroot/sys/kernel/debug", NULL,
            bind_mount_flags, NULL) &&
      errno != ENOENT)
    exit(1);
  if (mount("/sys/fs/smackfs", "./syz-tmp/newroot/sys/fs/smackfs", NULL,
            bind_mount_flags, NULL) &&
      errno != ENOENT)
    exit(1);
  if (mount("/proc/sys/fs/binfmt_misc",
            "./syz-tmp/newroot/proc/sys/fs/binfmt_misc", NULL, bind_mount_flags,
            NULL) &&
      errno != ENOENT)
    exit(1);
  if (mkdir("./syz-tmp/newroot/syz-inputs", 0700))
    exit(1);
  if (mount("/syz-inputs", "./syz-tmp/newroot/syz-inputs", NULL,
            bind_mount_flags | MS_RDONLY, NULL) &&
      errno != ENOENT)
    exit(1);
  if (mkdir("./syz-tmp/pivot", 0777))
    exit(1);
  if (syscall(SYS_pivot_root, "./syz-tmp", "./syz-tmp/pivot")) {
    if (chdir("./syz-tmp"))
      exit(1);
  } else {
    if (chdir("/"))
      exit(1);
    if (umount2("./pivot", MNT_DETACH))
      exit(1);
  }
  if (chroot("./newroot"))
    exit(1);
  if (chdir("/"))
    exit(1);
  setup_gadgetfs();
  setup_binderfs();
  setup_fusectl();
}

static void setup_gadgetfs()
{
  if (mkdir("/dev/gadgetfs", 0777)) {
  }
  if (mount("gadgetfs", "/dev/gadgetfs", "gadgetfs", 0, NULL)) {
  }
}

static void setup_fusectl()
{
  if (mount(0, "/sys/fs/fuse/connections", "fusectl", 0, 0)) {
  }
}

static void setup_binderfs()
{
  if (mkdir("/dev/binderfs", 0777)) {
  }
  if (mount("binder", "/dev/binderfs", "binder", 0, NULL)) {
  }
}

static void loop();

static void sandbox_common()
{
  prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
  if (getppid() == 1)
    exit(1);
  struct rlimit rlim;
  rlim.rlim_cur = rlim.rlim_max = (200 << 20);
  setrlimit(RLIMIT_AS, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 32 << 20;
  setrlimit(RLIMIT_MEMLOCK, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 136 << 20;
  setrlimit(RLIMIT_FSIZE, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 1 << 20;
  setrlimit(RLIMIT_STACK, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 128 << 20;
  setrlimit(RLIMIT_CORE, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 256;
  setrlimit(RLIMIT_NOFILE, &rlim);
  if (unshare(CLONE_NEWNS)) {
  }
  if (mount(NULL, "/", NULL, MS_REC | MS_PRIVATE, NULL)) {
  }
  if (unshare(CLONE_NEWIPC)) {
  }
  if (unshare(0x02000000)) {
  }
  if (unshare(CLONE_NEWUTS)) {
  }
  if (unshare(CLONE_SYSVSEM)) {
  }
  typedef struct {
    const char* name;
    const char* value;
  } sysctl_t;
  static const sysctl_t sysctls[] = {
      {"/proc/sys/kernel/shmmax", "16777216"},
      {"/proc/sys/kernel/shmall", "536870912"},
      {"/proc/sys/kernel/shmmni", "1024"},
      {"/proc/sys/kernel/msgmax", "8192"},
      {"/proc/sys/kernel/msgmni", "1024"},
      {"/proc/sys/kernel/msgmnb", "1024"},
      {"/proc/sys/kernel/sem", "1024 1048576 500 1024"},
  };
  unsigned i;
  for (i = 0; i < sizeof(sysctls) / sizeof(sysctls[0]); i++)
    write_file(sysctls[i].name, sysctls[i].value);
}

static int wait_for_loop(int pid)
{
  if (pid < 0)
    exit(1);
  int status = 0;
  while (waitpid(-1, &status, __WALL) != pid) {
  }
  return WEXITSTATUS(status);
}

static void drop_caps(void)
{
  struct __user_cap_header_struct cap_hdr = {};
  struct __user_cap_data_struct cap_data[2] = {};
  cap_hdr.version = _LINUX_CAPABILITY_VERSION_3;
  cap_hdr.pid = getpid();
  if (syscall(SYS_capget, &cap_hdr, &cap_data))
    exit(1);
  const int drop = (1 << CAP_SYS_PTRACE) | (1 << CAP_SYS_NICE);
  cap_data[0].effective &= ~drop;
  cap_data[0].permitted &= ~drop;
  cap_data[0].inheritable &= ~drop;
  if (syscall(SYS_capset, &cap_hdr, &cap_data))
    exit(1);
}

static int do_sandbox_none(void)
{
  if (unshare(CLONE_NEWPID)) {
  }
  int pid = fork();
  if (pid != 0)
    return wait_for_loop(pid);
  initialize_vhci();
  sandbox_common();
  drop_caps();
  if (unshare(CLONE_NEWNET)) {
  }
  write_file("/proc/sys/net/ipv4/ping_group_range", "0 65535");
  sandbox_common_mount_tmpfs();
  loop();
  exit(1);
}

#define FS_IOC_SETFLAGS _IOW('f', 2, long)
static void remove_dir(const char* dir)
{
  int iter = 0;
  DIR* dp = 0;
  const int umount_flags = MNT_FORCE | UMOUNT_NOFOLLOW;

retry:
  while (umount2(dir, umount_flags) == 0) {
  }
  dp = opendir(dir);
  if (dp == NULL) {
    if (errno == EMFILE) {
      exit(1);
    }
    exit(1);
  }
  struct dirent* ep = 0;
  while ((ep = readdir(dp))) {
    if (strcmp(ep->d_name, ".") == 0 || strcmp(ep->d_name, "..") == 0)
      continue;
    char filename[FILENAME_MAX];
    snprintf(filename, sizeof(filename), "%s/%s", dir, ep->d_name);
    while (umount2(filename, umount_flags) == 0) {
    }
    struct stat st;
    if (lstat(filename, &st))
      exit(1);
    if (S_ISDIR(st.st_mode)) {
      remove_dir(filename);
      continue;
    }
    int i;
    for (i = 0;; i++) {
      if (unlink(filename) == 0)
        break;
      if (errno == EPERM) {
        int fd = open(filename, O_RDONLY);
        if (fd != -1) {
          long flags = 0;
          if (ioctl(fd, FS_IOC_SETFLAGS, &flags) == 0) {
          }
          close(fd);
          continue;
        }
      }
      if (errno == EROFS) {
        break;
      }
      if (errno != EBUSY || i > 100)
        exit(1);
      if (umount2(filename, umount_flags))
        exit(1);
    }
  }
  closedir(dp);
  for (int i = 0;; i++) {
    if (rmdir(dir) == 0)
      break;
    if (i < 100) {
      if (errno == EPERM) {
        int fd = open(dir, O_RDONLY);
        if (fd != -1) {
          long flags = 0;
          if (ioctl(fd, FS_IOC_SETFLAGS, &flags) == 0) {
          }
          close(fd);
          continue;
        }
      }
      if (errno == EROFS) {
        break;
      }
      if (errno == EBUSY) {
        if (umount2(dir, umount_flags))
          exit(1);
        continue;
      }
      if (errno == ENOTEMPTY) {
        if (iter < 100) {
          iter++;
          goto retry;
        }
      }
    }
    exit(1);
  }
}

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");
  if (symlink("/dev/binderfs", "./binderfs")) {
  }
}

static void close_fds()
{
  for (int fd = 3; fd < MAX_FDS; fd++)
    close(fd);
}

static const char* setup_usb()
{
  if (chmod("/dev/raw-gadget", 0666))
    return "failed to chmod /dev/raw-gadget";
  return NULL;
}

static void setup_sysctl()
{
  int cad_pid = fork();
  if (cad_pid < 0)
    exit(1);
  if (cad_pid == 0) {
    for (;;)
      sleep(100);
  }
  char tmppid[32];
  snprintf(tmppid, sizeof(tmppid), "%d", cad_pid);
  struct {
    const char* name;
    const char* data;
  } files[] = {
      {"/sys/kernel/debug/x86/nmi_longest_ns", "10000000000"},
      {"/proc/sys/kernel/hung_task_check_interval_secs", "20"},
      {"/proc/sys/net/core/bpf_jit_kallsyms", "1"},
      {"/proc/sys/net/core/bpf_jit_harden", "0"},
      {"/proc/sys/kernel/kptr_restrict", "0"},
      {"/proc/sys/kernel/softlockup_all_cpu_backtrace", "1"},
      {"/proc/sys/fs/mount-max", "100"},
      {"/proc/sys/vm/oom_dump_tasks", "0"},
      {"/proc/sys/debug/exception-trace", "0"},
      {"/proc/sys/kernel/printk", "7 4 1 3"},
      {"/proc/sys/kernel/keys/gc_delay", "1"},
      {"/proc/sys/vm/oom_kill_allocating_task", "1"},
      {"/proc/sys/kernel/ctrl-alt-del", "0"},
      {"/proc/sys/kernel/cad_pid", tmppid},
  };
  for (size_t i = 0; i < sizeof(files) / sizeof(files[0]); i++) {
    if (!write_file(files[i].name, files[i].data)) {
    }
  }
  kill(cad_pid, SIGKILL);
  while (waitpid(cad_pid, NULL, 0) != cad_pid)
    ;
}

static void execute_one(void);

#define WAIT_FLAGS __WALL

static void loop(void)
{
  int iter = 0;
  for (;; iter++) {
    char cwdbuf[32];
    sprintf(cwdbuf, "./%d", iter);
    if (mkdir(cwdbuf, 0777))
      exit(1);
    int pid = fork();
    if (pid < 0)
      exit(1);
    if (pid == 0) {
      if (chdir(cwdbuf))
        exit(1);
      setup_test();
      execute_one();
      close_fds();
      exit(0);
    }
    int status = 0;
    uint64_t start = current_time_ms();
    for (;;) {
      sleep_ms(10);
      if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid)
        break;
      if (current_time_ms() - start < 5000)
        continue;
      kill_and_wait(pid, &status);
      break;
    }
    remove_dir(cwdbuf);
  }
}

uint64_t r[4] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff,
                 0xffffffffffffffff};

void execute_one(void)
{
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  openat$kvm arguments: [
  //    fd: const = 0xffffffffffffff9c (8 bytes)
  //    file: ptr[in, buffer] {
  //      buffer: {2f 64 65 76 2f 6b 76 6d 00} (length 0x9)
  //    }
  //    flags: open_flags = 0x0 (4 bytes)
  //    mode: const = 0x0 (2 bytes)
  //  ]
  //  returns fd_kvm
  memcpy((void*)0x200000000000, "/dev/kvm\000", 9);
  res = syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul,
                /*file=*/0x200000000000ul, /*flags=*/0, /*mode=*/0);
  if (res != -1)
    r[0] = res;
  //  ioctl$KVM_CREATE_VM arguments: [
  //    fd: fd_kvm (resource)
  //    cmd: const = 0xae01 (4 bytes)
  //    type: intptr = 0x0 (8 bytes)
  //  ]
  //  returns fd_kvmvm
  res = syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0xae01, /*type=*/0ul);
  if (res != -1)
    r[1] = res;
  //  ioctl$KVM_SET_USER_MEMORY_REGION arguments: [
  //    fd: fd_kvmvm (resource)
  //    cmd: const = 0x4020ae46 (4 bytes)
  //    arg: ptr[in, kvm_userspace_memory_region] {
  //      kvm_userspace_memory_region {
  //        slot: kvm_mem_slots = 0x3 (4 bytes)
  //        flags: kvm_mem_region_flags = 0x2 (4 bytes)
  //        paddr: kvm_guest_addrs = 0xfec00000 (8 bytes)
  //        size: len = 0x1000 (8 bytes)
  //        addr: VMA[0x1000]
  //      }
  //    }
  //  ]
  *(uint32_t*)0x200000000140 = 3;
  *(uint32_t*)0x200000000144 = 2;
  *(uint64_t*)0x200000000148 = 0xfec00000;
  *(uint64_t*)0x200000000150 = 0x1000;
  *(uint64_t*)0x200000000158 = 0x200000f40000;
  syscall(__NR_ioctl, /*fd=*/r[1], /*cmd=*/0x4020ae46,
          /*arg=*/0x200000000140ul);
  //  ioctl$KVM_SET_USER_MEMORY_REGION2 arguments: [
  //    fd: fd_kvmvm (resource)
  //    cmd: const = 0x40a0ae49 (4 bytes)
  //    arg: ptr[in, kvm_userspace_memory_region2] {
  //      kvm_userspace_memory_region2 {
  //        slot: kvm_mem_slots = 0x5 (4 bytes)
  //        flags: kvm_mem_region_flags = 0x0 (4 bytes)
  //        paddr: kvm_guest_addrs = 0x4000 (8 bytes)
  //        size: len = 0x2000 (8 bytes)
  //        addr: VMA[0x2000]
  //        guest_memfd_offset: int64 = 0x7 (8 bytes)
  //        guest_memfd: fd_kvm_guest_memfd (resource)
  //        pad1: const = 0x0 (4 bytes)
  //        pad2: buffer: {00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  //        00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  //        00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  //        00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  //        00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  //        00 00} (length 0x70)
  //      }
  //    }
  //  ]
  *(uint32_t*)0x200000000280 = 5;
  *(uint32_t*)0x200000000284 = 0;
  *(uint64_t*)0x200000000288 = 0x4000;
  *(uint64_t*)0x200000000290 = 0x2000;
  *(uint64_t*)0x200000000298 = 0x200000d6c000;
  *(uint64_t*)0x2000000002a0 = 7;
  *(uint32_t*)0x2000000002a8 = -1;
  *(uint32_t*)0x2000000002ac = 0;
  memset((void*)0x2000000002b0, 0, 112);
  syscall(__NR_ioctl, /*fd=*/r[1], /*cmd=*/0x40a0ae49,
          /*arg=*/0x200000000280ul);
  //  ioctl$KVM_CREATE_VCPU arguments: [
  //    fd: fd_kvmvm (resource)
  //    cmd: const = 0xae41 (4 bytes)
  //    id: intptr = 0x2 (8 bytes)
  //  ]
  //  returns fd_kvmcpu
  syscall(__NR_ioctl, /*fd=*/(intptr_t)-1, /*cmd=*/0xae41, /*id=*/2ul);
  //  socket$nl_rdma arguments: [
  //    domain: const = 0x10 (8 bytes)
  //    type: const = 0x3 (8 bytes)
  //    proto: const = 0x14 (4 bytes)
  //  ]
  //  returns sock_nl_rdma
  res = syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/0x14);
  if (res != -1)
    r[2] = res;
  //  sendmsg$RDMA_NLDEV_CMD_NEWLINK arguments: [
  //    fd: sock_nl_rdma (resource)
  //    msg: ptr[in, msghdr_netlink[netlink_msg[RDMA_NLDEV_NEWLINK, void,
  //    nldev_policy$NEWLINK]]] {
  //      msghdr_netlink[netlink_msg[RDMA_NLDEV_NEWLINK, void,
  //      nldev_policy$NEWLINK]] {
  //        addr: nil
  //        addrlen: len = 0x0 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //        vec: ptr[in, iovec[in, netlink_msg[RDMA_NLDEV_NEWLINK, void,
  //        nldev_policy$NEWLINK]]] {
  //          iovec[in, netlink_msg[RDMA_NLDEV_NEWLINK, void,
  //          nldev_policy$NEWLINK]] {
  //            addr: ptr[inout, array[ANYUNION]] {
  //              array[ANYUNION] {
  //                union ANYUNION {
  //                  ANYBLOB: buffer: {38 00 00 00 03 14 01 00 2a bd 70 00 fe
  //                  db df 25 09 00 02 00 73 01 7a 31 00 00 00 00 08 00 41 00
  //                  72 78 65 00 14 00 33 00 6c 6f} (length 0x2a)
  //                }
  //              }
  //            }
  //            len: len = 0x38 (8 bytes)
  //          }
  //        }
  //        vlen: const = 0x1 (8 bytes)
  //        ctrl: const = 0x0 (8 bytes)
  //        ctrllen: const = 0x0 (8 bytes)
  //        f: send_flags = 0x44 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //      }
  //    }
  //    f: send_flags = 0x810 (8 bytes)
  //  ]
  *(uint64_t*)0x200000000240 = 0;
  *(uint32_t*)0x200000000248 = 0;
  *(uint64_t*)0x200000000250 = 0x200000000080;
  *(uint64_t*)0x200000000080 = 0x200000000000;
  memcpy((void*)0x200000000000,
         "\x38\x00\x00\x00\x03\x14\x01\x00\x2a\xbd\x70\x00\xfe\xdb\xdf\x25\x09"
         "\x00\x02\x00\x73\x01\x7a\x31\x00\x00\x00\x00\x08\x00\x41\x00\x72\x78"
         "\x65\x00\x14\x00\x33\x00\x6c\x6f",
         42);
  *(uint64_t*)0x200000000088 = 0x38;
  *(uint64_t*)0x200000000258 = 1;
  *(uint64_t*)0x200000000260 = 0;
  *(uint64_t*)0x200000000268 = 0;
  *(uint32_t*)0x200000000270 = 0x44;
  syscall(__NR_sendmsg, /*fd=*/r[2], /*msg=*/0x200000000240ul,
          /*f=MSG_PROBE|MSG_CONFIRM*/ 0x810ul);
  //  socket$nl_rdma arguments: [
  //    domain: const = 0x10 (8 bytes)
  //    type: const = 0x3 (8 bytes)
  //    proto: const = 0x14 (4 bytes)
  //  ]
  //  returns sock_nl_rdma
  res = syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/0x14);
  if (res != -1)
    r[3] = res;
  //  sendmsg$RDMA_NLDEV_CMD_DELLINK arguments: [
  //    fd: sock_nl_rdma (resource)
  //    msg: ptr[in, msghdr_netlink[netlink_msg[RDMA_NLDEV_DELLINK, void,
  //    nldev_policy$DEV]]] {
  //      msghdr_netlink[netlink_msg[RDMA_NLDEV_DELLINK, void,
  //      nldev_policy$DEV]] {
  //        addr: nil
  //        addrlen: len = 0x0 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //        vec: nil
  //        vlen: const = 0x1 (8 bytes)
  //        ctrl: const = 0x0 (8 bytes)
  //        ctrllen: const = 0x0 (8 bytes)
  //        f: send_flags = 0x671ec167a4b72164 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //      }
  //    }
  //    f: send_flags = 0x0 (8 bytes)
  //  ]
  *(uint64_t*)0x2000000002c0 = 0;
  *(uint32_t*)0x2000000002c8 = 0;
  *(uint64_t*)0x2000000002d0 = 0;
  *(uint64_t*)0x2000000002d8 = 1;
  *(uint64_t*)0x2000000002e0 = 0;
  *(uint64_t*)0x2000000002e8 = 0;
  *(uint32_t*)0x2000000002f0 = 0xa4b72164;
  syscall(__NR_sendmsg, /*fd=*/r[3], /*msg=*/0x2000000002c0ul, /*f=*/0ul);
  //  sendmsg$RDMA_NLDEV_CMD_DELLINK arguments: [
  //    fd: sock_nl_rdma (resource)
  //    msg: ptr[in, msghdr_netlink[netlink_msg[RDMA_NLDEV_DELLINK, void,
  //    nldev_policy$DEV]]] {
  //      msghdr_netlink[netlink_msg[RDMA_NLDEV_DELLINK, void,
  //      nldev_policy$DEV]] {
  //        addr: nil
  //        addrlen: len = 0x0 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //        vec: ptr[in, iovec[in, netlink_msg[RDMA_NLDEV_DELLINK, void,
  //        nldev_policy$DEV]]] {
  //          iovec[in, netlink_msg[RDMA_NLDEV_DELLINK, void, nldev_policy$DEV]]
  //          {
  //            addr: ptr[in, netlink_msg_t[const[RDMA_NLDEV_DELLINK, int16],
  //            void, nldev_policy$DEV]] {
  //              netlink_msg_t[const[RDMA_NLDEV_DELLINK, int16], void,
  //              nldev_policy$DEV] {
  //                len: len = 0x18 (4 bytes)
  //                type: const = 0x1404 (2 bytes)
  //                flags: netlink_msg_flags = 0x1 (2 bytes)
  //                seq: int32 = 0x70bd2d (4 bytes)
  //                pid: int32 = 0x25dfdbfe (4 bytes)
  //                payload: buffer: {} (length 0x0)
  //                attrs: array[nldev_policy$DEV] {
  //                  union nldev_policy$DEV {
  //                    RDMA_NLDEV_ATTR_DEV_INDEX:
  //                    nlattr_t[const[RDMA_NLDEV_ATTR_DEV_INDEX, int16],
  //                    int32[0:2]] {
  //                      nla_len: offsetof = 0x8 (2 bytes)
  //                      nla_type: const = 0x1 (2 bytes)
  //                      payload: int32 = 0x0 (4 bytes)
  //                      size: buffer: {} (length 0x0)
  //                    }
  //                  }
  //                }
  //              }
  //            }
  //            len: len = 0x18 (8 bytes)
  //          }
  //        }
  //        vlen: const = 0x1 (8 bytes)
  //        ctrl: const = 0x0 (8 bytes)
  //        ctrllen: const = 0x0 (8 bytes)
  //        f: send_flags = 0x671ec167a4b72164 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //      }
  //    }
  //    f: send_flags = 0x0 (8 bytes)
  //  ]
  *(uint64_t*)0x2000000002c0 = 0;
  *(uint32_t*)0x2000000002c8 = 0;
  *(uint64_t*)0x2000000002d0 = 0x200000000280;
  *(uint64_t*)0x200000000280 = 0x200000000100;
  *(uint32_t*)0x200000000100 = 0x18;
  *(uint16_t*)0x200000000104 = 0x1404;
  *(uint16_t*)0x200000000106 = 1;
  *(uint32_t*)0x200000000108 = 0x70bd2d;
  *(uint32_t*)0x20000000010c = 0x25dfdbfe;
  *(uint16_t*)0x200000000110 = 8;
  *(uint16_t*)0x200000000112 = 1;
  *(uint32_t*)0x200000000114 = 0;
  *(uint64_t*)0x200000000288 = 0x18;
  *(uint64_t*)0x2000000002d8 = 1;
  *(uint64_t*)0x2000000002e0 = 0;
  *(uint64_t*)0x2000000002e8 = 0;
  *(uint32_t*)0x2000000002f0 = 0xa4b72164;
  syscall(__NR_sendmsg, /*fd=*/r[3], /*msg=*/0x2000000002c0ul, /*f=*/0ul);
  //  ioctl$KVM_SET_USER_MEMORY_REGION arguments: [
  //    fd: fd_kvmvm (resource)
  //    cmd: const = 0x4020ae46 (4 bytes)
  //    arg: ptr[in, kvm_userspace_memory_region] {
  //      kvm_userspace_memory_region {
  //        slot: kvm_mem_slots = 0x1ff (4 bytes)
  //        flags: kvm_mem_region_flags = 0x4 (4 bytes)
  //        paddr: kvm_guest_addrs = 0x0 (8 bytes)
  //        size: len = 0x1000 (8 bytes)
  //        addr: VMA[0x1000]
  //      }
  //    }
  //  ]
  *(uint32_t*)0x200000000100 = 0x1ff;
  *(uint32_t*)0x200000000104 = 4;
  *(uint64_t*)0x200000000108 = 0;
  *(uint64_t*)0x200000000110 = 0x1000;
  *(uint64_t*)0x200000000118 = 0x200000c00000;
  syscall(__NR_ioctl, /*fd=*/r[1], /*cmd=*/0x4020ae46,
          /*arg=*/0x200000000100ul);
  //  ioctl$KVM_SET_USER_MEMORY_REGION arguments: [
  //    fd: fd_kvmvm (resource)
  //    cmd: const = 0x4020ae46 (4 bytes)
  //    arg: ptr[in, kvm_userspace_memory_region] {
  //      kvm_userspace_memory_region {
  //        slot: kvm_mem_slots = 0x1ff (4 bytes)
  //        flags: kvm_mem_region_flags = 0x4 (4 bytes)
  //        paddr: kvm_guest_addrs = 0x0 (8 bytes)
  //        size: len = 0x1000 (8 bytes)
  //        addr: VMA[0x1000]
  //      }
  //    }
  //  ]
  *(uint32_t*)0x200000000100 = 0x1ff;
  *(uint32_t*)0x200000000104 = 4;
  *(uint64_t*)0x200000000108 = 0;
  *(uint64_t*)0x200000000110 = 0x1000;
  *(uint64_t*)0x200000000118 = 0x200000c00000;
  syscall(__NR_ioctl, /*fd=*/r[1], /*cmd=*/0x4020ae46,
          /*arg=*/0x200000000100ul);
  //  sendmsg$NFT_BATCH arguments: [
  //    fd: sock_nl_netfilter (resource)
  //    msg: nil
  //    f: send_flags = 0x0 (8 bytes)
  //  ]
  syscall(__NR_sendmsg, /*fd=*/(intptr_t)-1, /*msg=*/0ul, /*f=*/0ul);
  //  ioctl$FBIOPUT_VSCREENINFO arguments: [
  //    fd: fd_fb (resource)
  //    cmd: const = 0x4601 (4 bytes)
  //    arg: ptr[in, fb_var_screeninfo] {
  //      fb_var_screeninfo {
  //        xres: fb_xres = 0x300 (4 bytes)
  //        yres: fb_yres = 0x1e0 (4 bytes)
  //        xres_virtual: fb_xres = 0x356 (4 bytes)
  //        yres_virtual: fb_yres = 0x480 (4 bytes)
  //        xoffset: int32 = 0x4 (4 bytes)
  //        yoffset: int32 = 0x2 (4 bytes)
  //        bits_per_pixel: fb_bpp = 0x0 (4 bytes)
  //        grayscale: int32 = 0x2 (4 bytes)
  //        red: fb_bitfield {
  //          offset: int32 = 0x80000001 (4 bytes)
  //          length: int32 = 0x2 (4 bytes)
  //          msb_right: int32 = 0x1 (4 bytes)
  //        }
  //        green: fb_bitfield {
  //          offset: int32 = 0x4 (4 bytes)
  //          length: int32 = 0x7 (4 bytes)
  //          msb_right: int32 = 0x1 (4 bytes)
  //        }
  //        blue: fb_bitfield {
  //          offset: int32 = 0x0 (4 bytes)
  //          length: int32 = 0x7 (4 bytes)
  //          msb_right: int32 = 0x1 (4 bytes)
  //        }
  //        transp: fb_bitfield {
  //          offset: int32 = 0xcb1 (4 bytes)
  //          length: int32 = 0x0 (4 bytes)
  //          msb_right: int32 = 0x1 (4 bytes)
  //        }
  //        nonstd: fb_nonstd = 0x2 (4 bytes)
  //        activate: fb_activate = 0x1fc (4 bytes)
  //        height: int32 = 0x9 (4 bytes)
  //        width: int32 = 0xffff0001 (4 bytes)
  //        accel_flags: fb_accel_flags = 0x0 (4 bytes)
  //        pixclock: int32 = 0xf1 (4 bytes)
  //        left_margin: int32 = 0x7ff (4 bytes)
  //        right_margin: int32 = 0x7 (4 bytes)
  //        upper_margin: int32 = 0xda (4 bytes)
  //        lower_margin: int32 = 0x2 (4 bytes)
  //        hsync_len: int32 = 0x5 (4 bytes)
  //        vsync_len: int32 = 0x6 (4 bytes)
  //        sync: fb_sync = 0xa (4 bytes)
  //        vmode: fb_mode = 0x100 (4 bytes)
  //        rotate: fb_rotate = 0x0 (4 bytes)
  //        colorspace: v4l2_colorspace = 0x4 (4 bytes)
  //        reserved: buffer: {00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00}
  //        (length 0x10)
  //      }
  //    }
  //  ]
  *(uint32_t*)0x200000000500 = 0x300;
  *(uint32_t*)0x200000000504 = 0x1e0;
  *(uint32_t*)0x200000000508 = 0x356;
  *(uint32_t*)0x20000000050c = 0x480;
  *(uint32_t*)0x200000000510 = 4;
  *(uint32_t*)0x200000000514 = 2;
  *(uint32_t*)0x200000000518 = 0;
  *(uint32_t*)0x20000000051c = 2;
  *(uint32_t*)0x200000000520 = 0x80000001;
  *(uint32_t*)0x200000000524 = 2;
  *(uint32_t*)0x200000000528 = 1;
  *(uint32_t*)0x20000000052c = 4;
  *(uint32_t*)0x200000000530 = 7;
  *(uint32_t*)0x200000000534 = 1;
  *(uint32_t*)0x200000000538 = 0;
  *(uint32_t*)0x20000000053c = 7;
  *(uint32_t*)0x200000000540 = 1;
  *(uint32_t*)0x200000000544 = 0xcb1;
  *(uint32_t*)0x200000000548 = 0;
  *(uint32_t*)0x20000000054c = 1;
  *(uint32_t*)0x200000000550 = 2;
  *(uint32_t*)0x200000000554 = 0x1fc;
  *(uint32_t*)0x200000000558 = 9;
  *(uint32_t*)0x20000000055c = 0xffff0001;
  *(uint32_t*)0x200000000560 = 0;
  *(uint32_t*)0x200000000564 = 0xf1;
  *(uint32_t*)0x200000000568 = 0x7ff;
  *(uint32_t*)0x20000000056c = 7;
  *(uint32_t*)0x200000000570 = 0xda;
  *(uint32_t*)0x200000000574 = 2;
  *(uint32_t*)0x200000000578 = 5;
  *(uint32_t*)0x20000000057c = 6;
  *(uint32_t*)0x200000000580 = 0xa;
  *(uint32_t*)0x200000000584 = 0x100;
  *(uint32_t*)0x200000000588 = 0;
  *(uint32_t*)0x20000000058c = 4;
  memset((void*)0x200000000590, 0, 16);
  syscall(__NR_ioctl, /*fd=*/(intptr_t)-1, /*cmd=*/0x4601,
          /*arg=*/0x200000000500ul);
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffffffff000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x200000000000ul, /*len=*/0x1000000ul,
          /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x200001000000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  setup_sysctl();
  const char* reason;
  (void)reason;
  if ((reason = setup_usb()))
    printf("the reproducer may not work as expected: USB injection setup "
           "failed: %s\n",
           reason);
  for (procid = 0; procid < 4; procid++) {
    if (fork() == 0) {
      use_temporary_dir();
      do_sandbox_none();
    }
  }
  sleep(1000000);
  return 0;
}