// https://syzkaller.appspot.com/bug?id=af4e096cd916465ae6a9d7d2b680fc321d75e60e
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <arpa/inet.h>
#include <dirent.h>
#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <net/if.h>
#include <net/if_arp.h>
#include <netinet/in.h>
#include <pthread.h>
#include <sched.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/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/futex.h>
#include <linux/genetlink.h>
#include <linux/if_addr.h>
#include <linux/if_ether.h>
#include <linux/if_link.h>
#include <linux/if_tun.h>
#include <linux/in6.h>
#include <linux/ip.h>
#include <linux/neighbour.h>
#include <linux/net.h>
#include <linux/netlink.h>
#include <linux/rfkill.h>
#include <linux/rtnetlink.h>
#include <linux/tcp.h>
#include <linux/veth.h>

static unsigned long long procid;

static __thread int skip_segv;
static __thread jmp_buf segv_env;

static void segv_handler(int sig, siginfo_t* info, void* ctx)
{
  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(...)                                                        \
  {                                                                            \
    __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 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 void thread_start(void* (*fn)(void*), void* arg)
{
  pthread_t th;
  pthread_attr_t attr;
  pthread_attr_init(&attr);
  pthread_attr_setstacksize(&attr, 128 << 10);
  int i = 0;
  for (; i < 100; i++) {
    if (pthread_create(&th, &attr, fn, arg) == 0) {
      pthread_attr_destroy(&attr);
      return;
    }
    if (errno == EAGAIN) {
      usleep(50);
      continue;
    }
    break;
  }
  exit(1);
}

typedef struct {
  int state;
} event_t;

static void event_init(event_t* ev)
{
  ev->state = 0;
}

static void event_reset(event_t* ev)
{
  ev->state = 0;
}

static void event_set(event_t* ev)
{
  if (ev->state)
    exit(1);
  __atomic_store_n(&ev->state, 1, __ATOMIC_RELEASE);
  syscall(SYS_futex, &ev->state, FUTEX_WAKE | FUTEX_PRIVATE_FLAG, 1000000);
}

static void event_wait(event_t* ev)
{
  while (!__atomic_load_n(&ev->state, __ATOMIC_ACQUIRE))
    syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, 0);
}

static int event_isset(event_t* ev)
{
  return __atomic_load_n(&ev->state, __ATOMIC_ACQUIRE);
}

static int event_timedwait(event_t* ev, uint64_t timeout)
{
  uint64_t start = current_time_ms();
  uint64_t now = start;
  for (;;) {
    uint64_t remain = timeout - (now - start);
    struct timespec ts;
    ts.tv_sec = remain / 1000;
    ts.tv_nsec = (remain % 1000) * 1000 * 1000;
    syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, &ts);
    if (__atomic_load_n(&ev->state, __ATOMIC_ACQUIRE))
      return 1;
    now = current_time_ms();
    if (now - start > timeout)
      return 0;
  }
}

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;
}

struct nlmsg {
  char* pos;
  int nesting;
  struct nlattr* nested[8];
  char buf[1024];
};

static struct nlmsg nlmsg;

static void netlink_init(struct nlmsg* nlmsg, int typ, int flags,
                         const void* data, int size)
{
  memset(nlmsg, 0, sizeof(*nlmsg));
  struct nlmsghdr* hdr = (struct nlmsghdr*)nlmsg->buf;
  hdr->nlmsg_type = typ;
  hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK | flags;
  memcpy(hdr + 1, data, size);
  nlmsg->pos = (char*)(hdr + 1) + NLMSG_ALIGN(size);
}

static void netlink_attr(struct nlmsg* nlmsg, int typ, const void* data,
                         int size)
{
  struct nlattr* attr = (struct nlattr*)nlmsg->pos;
  attr->nla_len = sizeof(*attr) + size;
  attr->nla_type = typ;
  memcpy(attr + 1, data, size);
  nlmsg->pos += NLMSG_ALIGN(attr->nla_len);
}

static void netlink_nest(struct nlmsg* nlmsg, int typ)
{
  struct nlattr* attr = (struct nlattr*)nlmsg->pos;
  attr->nla_type = typ;
  nlmsg->pos += sizeof(*attr);
  nlmsg->nested[nlmsg->nesting++] = attr;
}

static void netlink_done(struct nlmsg* nlmsg)
{
  struct nlattr* attr = nlmsg->nested[--nlmsg->nesting];
  attr->nla_len = nlmsg->pos - (char*)attr;
}

static int netlink_send_ext(struct nlmsg* nlmsg, int sock, uint16_t reply_type,
                            int* reply_len)
{
  if (nlmsg->pos > nlmsg->buf + sizeof(nlmsg->buf) || nlmsg->nesting)
    exit(1);
  struct nlmsghdr* hdr = (struct nlmsghdr*)nlmsg->buf;
  hdr->nlmsg_len = nlmsg->pos - nlmsg->buf;
  struct sockaddr_nl addr;
  memset(&addr, 0, sizeof(addr));
  addr.nl_family = AF_NETLINK;
  unsigned n = sendto(sock, nlmsg->buf, hdr->nlmsg_len, 0,
                      (struct sockaddr*)&addr, sizeof(addr));
  if (n != hdr->nlmsg_len)
    exit(1);
  n = recv(sock, nlmsg->buf, sizeof(nlmsg->buf), 0);
  if (reply_len)
    *reply_len = 0;
  if (hdr->nlmsg_type == NLMSG_DONE)
    return 0;
  if (n < sizeof(struct nlmsghdr))
    exit(1);
  if (reply_len && hdr->nlmsg_type == reply_type) {
    *reply_len = n;
    return 0;
  }
  if (n < sizeof(struct nlmsghdr) + sizeof(struct nlmsgerr))
    exit(1);
  if (hdr->nlmsg_type != NLMSG_ERROR)
    exit(1);
  return -((struct nlmsgerr*)(hdr + 1))->error;
}

static int netlink_send(struct nlmsg* nlmsg, int sock)
{
  return netlink_send_ext(nlmsg, sock, 0, NULL);
}

static int netlink_next_msg(struct nlmsg* nlmsg, unsigned int offset,
                            unsigned int total_len)
{
  struct nlmsghdr* hdr = (struct nlmsghdr*)(nlmsg->buf + offset);
  if (offset == total_len || offset + hdr->nlmsg_len > total_len)
    return -1;
  return hdr->nlmsg_len;
}

static void netlink_add_device_impl(struct nlmsg* nlmsg, const char* type,
                                    const char* name)
{
  struct ifinfomsg hdr;
  memset(&hdr, 0, sizeof(hdr));
  netlink_init(nlmsg, RTM_NEWLINK, NLM_F_EXCL | NLM_F_CREATE, &hdr,
               sizeof(hdr));
  if (name)
    netlink_attr(nlmsg, IFLA_IFNAME, name, strlen(name));
  netlink_nest(nlmsg, IFLA_LINKINFO);
  netlink_attr(nlmsg, IFLA_INFO_KIND, type, strlen(type));
}

static void netlink_add_device(struct nlmsg* nlmsg, int sock, const char* type,
                               const char* name)
{
  netlink_add_device_impl(nlmsg, type, name);
  netlink_done(nlmsg);
  int err = netlink_send(nlmsg, sock);
  (void)err;
}

static void netlink_add_veth(struct nlmsg* nlmsg, int sock, const char* name,
                             const char* peer)
{
  netlink_add_device_impl(nlmsg, "veth", name);
  netlink_nest(nlmsg, IFLA_INFO_DATA);
  netlink_nest(nlmsg, VETH_INFO_PEER);
  nlmsg->pos += sizeof(struct ifinfomsg);
  netlink_attr(nlmsg, IFLA_IFNAME, peer, strlen(peer));
  netlink_done(nlmsg);
  netlink_done(nlmsg);
  netlink_done(nlmsg);
  int err = netlink_send(nlmsg, sock);
  (void)err;
}

static void netlink_add_hsr(struct nlmsg* nlmsg, int sock, const char* name,
                            const char* slave1, const char* slave2)
{
  netlink_add_device_impl(nlmsg, "hsr", name);
  netlink_nest(nlmsg, IFLA_INFO_DATA);
  int ifindex1 = if_nametoindex(slave1);
  netlink_attr(nlmsg, IFLA_HSR_SLAVE1, &ifindex1, sizeof(ifindex1));
  int ifindex2 = if_nametoindex(slave2);
  netlink_attr(nlmsg, IFLA_HSR_SLAVE2, &ifindex2, sizeof(ifindex2));
  netlink_done(nlmsg);
  netlink_done(nlmsg);
  int err = netlink_send(nlmsg, sock);
  (void)err;
}

static void netlink_add_linked(struct nlmsg* nlmsg, int sock, const char* type,
                               const char* name, const char* link)
{
  netlink_add_device_impl(nlmsg, type, name);
  netlink_done(nlmsg);
  int ifindex = if_nametoindex(link);
  netlink_attr(nlmsg, IFLA_LINK, &ifindex, sizeof(ifindex));
  int err = netlink_send(nlmsg, sock);
  (void)err;
}

static void netlink_add_vlan(struct nlmsg* nlmsg, int sock, const char* name,
                             const char* link, uint16_t id, uint16_t proto)
{
  netlink_add_device_impl(nlmsg, "vlan", name);
  netlink_nest(nlmsg, IFLA_INFO_DATA);
  netlink_attr(nlmsg, IFLA_VLAN_ID, &id, sizeof(id));
  netlink_attr(nlmsg, IFLA_VLAN_PROTOCOL, &proto, sizeof(proto));
  netlink_done(nlmsg);
  netlink_done(nlmsg);
  int ifindex = if_nametoindex(link);
  netlink_attr(nlmsg, IFLA_LINK, &ifindex, sizeof(ifindex));
  int err = netlink_send(nlmsg, sock);
  (void)err;
}

static void netlink_add_macvlan(struct nlmsg* nlmsg, int sock, const char* name,
                                const char* link)
{
  netlink_add_device_impl(nlmsg, "macvlan", name);
  netlink_nest(nlmsg, IFLA_INFO_DATA);
  uint32_t mode = MACVLAN_MODE_BRIDGE;
  netlink_attr(nlmsg, IFLA_MACVLAN_MODE, &mode, sizeof(mode));
  netlink_done(nlmsg);
  netlink_done(nlmsg);
  int ifindex = if_nametoindex(link);
  netlink_attr(nlmsg, IFLA_LINK, &ifindex, sizeof(ifindex));
  int err = netlink_send(nlmsg, sock);
  (void)err;
}

static void netlink_add_geneve(struct nlmsg* nlmsg, int sock, const char* name,
                               uint32_t vni, struct in_addr* addr4,
                               struct in6_addr* addr6)
{
  netlink_add_device_impl(nlmsg, "geneve", name);
  netlink_nest(nlmsg, IFLA_INFO_DATA);
  netlink_attr(nlmsg, IFLA_GENEVE_ID, &vni, sizeof(vni));
  if (addr4)
    netlink_attr(nlmsg, IFLA_GENEVE_REMOTE, addr4, sizeof(*addr4));
  if (addr6)
    netlink_attr(nlmsg, IFLA_GENEVE_REMOTE6, addr6, sizeof(*addr6));
  netlink_done(nlmsg);
  netlink_done(nlmsg);
  int err = netlink_send(nlmsg, sock);
  (void)err;
}

#define IFLA_IPVLAN_FLAGS 2
#define IPVLAN_MODE_L3S 2
#undef IPVLAN_F_VEPA
#define IPVLAN_F_VEPA 2

static void netlink_add_ipvlan(struct nlmsg* nlmsg, int sock, const char* name,
                               const char* link, uint16_t mode, uint16_t flags)
{
  netlink_add_device_impl(nlmsg, "ipvlan", name);
  netlink_nest(nlmsg, IFLA_INFO_DATA);
  netlink_attr(nlmsg, IFLA_IPVLAN_MODE, &mode, sizeof(mode));
  netlink_attr(nlmsg, IFLA_IPVLAN_FLAGS, &flags, sizeof(flags));
  netlink_done(nlmsg);
  netlink_done(nlmsg);
  int ifindex = if_nametoindex(link);
  netlink_attr(nlmsg, IFLA_LINK, &ifindex, sizeof(ifindex));
  int err = netlink_send(nlmsg, sock);
  (void)err;
}

static void netlink_device_change(struct nlmsg* nlmsg, int sock,
                                  const char* name, bool up, const char* master,
                                  const void* mac, int macsize,
                                  const char* new_name)
{
  struct ifinfomsg hdr;
  memset(&hdr, 0, sizeof(hdr));
  if (up)
    hdr.ifi_flags = hdr.ifi_change = IFF_UP;
  hdr.ifi_index = if_nametoindex(name);
  netlink_init(nlmsg, RTM_NEWLINK, 0, &hdr, sizeof(hdr));
  if (new_name)
    netlink_attr(nlmsg, IFLA_IFNAME, new_name, strlen(new_name));
  if (master) {
    int ifindex = if_nametoindex(master);
    netlink_attr(nlmsg, IFLA_MASTER, &ifindex, sizeof(ifindex));
  }
  if (macsize)
    netlink_attr(nlmsg, IFLA_ADDRESS, mac, macsize);
  int err = netlink_send(nlmsg, sock);
  (void)err;
}

static int netlink_add_addr(struct nlmsg* nlmsg, int sock, const char* dev,
                            const void* addr, int addrsize)
{
  struct ifaddrmsg hdr;
  memset(&hdr, 0, sizeof(hdr));
  hdr.ifa_family = addrsize == 4 ? AF_INET : AF_INET6;
  hdr.ifa_prefixlen = addrsize == 4 ? 24 : 120;
  hdr.ifa_scope = RT_SCOPE_UNIVERSE;
  hdr.ifa_index = if_nametoindex(dev);
  netlink_init(nlmsg, RTM_NEWADDR, NLM_F_CREATE | NLM_F_REPLACE, &hdr,
               sizeof(hdr));
  netlink_attr(nlmsg, IFA_LOCAL, addr, addrsize);
  netlink_attr(nlmsg, IFA_ADDRESS, addr, addrsize);
  return netlink_send(nlmsg, sock);
}

static void netlink_add_addr4(struct nlmsg* nlmsg, int sock, const char* dev,
                              const char* addr)
{
  struct in_addr in_addr;
  inet_pton(AF_INET, addr, &in_addr);
  int err = netlink_add_addr(nlmsg, sock, dev, &in_addr, sizeof(in_addr));
  (void)err;
}

static void netlink_add_addr6(struct nlmsg* nlmsg, int sock, const char* dev,
                              const char* addr)
{
  struct in6_addr in6_addr;
  inet_pton(AF_INET6, addr, &in6_addr);
  int err = netlink_add_addr(nlmsg, sock, dev, &in6_addr, sizeof(in6_addr));
  (void)err;
}

#define DEVLINK_FAMILY_NAME "devlink"

#define DEVLINK_CMD_PORT_GET 5
#define DEVLINK_ATTR_BUS_NAME 1
#define DEVLINK_ATTR_DEV_NAME 2
#define DEVLINK_ATTR_NETDEV_NAME 7

static int netlink_devlink_id_get(struct nlmsg* nlmsg, int sock)
{
  struct genlmsghdr genlhdr;
  memset(&genlhdr, 0, sizeof(genlhdr));
  genlhdr.cmd = CTRL_CMD_GETFAMILY;
  netlink_init(nlmsg, GENL_ID_CTRL, 0, &genlhdr, sizeof(genlhdr));
  netlink_attr(nlmsg, CTRL_ATTR_FAMILY_NAME, DEVLINK_FAMILY_NAME,
               strlen(DEVLINK_FAMILY_NAME) + 1);
  int n = 0;
  int err = netlink_send_ext(nlmsg, sock, GENL_ID_CTRL, &n);
  if (err) {
    return -1;
  }
  uint16_t id = 0;
  struct nlattr* attr = (struct nlattr*)(nlmsg->buf + NLMSG_HDRLEN +
                                         NLMSG_ALIGN(sizeof(genlhdr)));
  for (; (char*)attr < nlmsg->buf + n;
       attr = (struct nlattr*)((char*)attr + NLMSG_ALIGN(attr->nla_len))) {
    if (attr->nla_type == CTRL_ATTR_FAMILY_ID) {
      id = *(uint16_t*)(attr + 1);
      break;
    }
  }
  if (!id) {
    return -1;
  }
  recv(sock, nlmsg->buf, sizeof(nlmsg->buf), 0);
  return id;
}

static struct nlmsg nlmsg2;

static void initialize_devlink_ports(const char* bus_name, const char* dev_name,
                                     const char* netdev_prefix)
{
  struct genlmsghdr genlhdr;
  int len, total_len, id, err, offset;
  uint16_t netdev_index;
  int sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC);
  if (sock == -1)
    exit(1);
  int rtsock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
  if (rtsock == -1)
    exit(1);
  id = netlink_devlink_id_get(&nlmsg, sock);
  if (id == -1)
    goto error;
  memset(&genlhdr, 0, sizeof(genlhdr));
  genlhdr.cmd = DEVLINK_CMD_PORT_GET;
  netlink_init(&nlmsg, id, NLM_F_DUMP, &genlhdr, sizeof(genlhdr));
  netlink_attr(&nlmsg, DEVLINK_ATTR_BUS_NAME, bus_name, strlen(bus_name) + 1);
  netlink_attr(&nlmsg, DEVLINK_ATTR_DEV_NAME, dev_name, strlen(dev_name) + 1);
  err = netlink_send_ext(&nlmsg, sock, id, &total_len);
  if (err) {
    goto error;
  }
  offset = 0;
  netdev_index = 0;
  while ((len = netlink_next_msg(&nlmsg, offset, total_len)) != -1) {
    struct nlattr* attr = (struct nlattr*)(nlmsg.buf + offset + NLMSG_HDRLEN +
                                           NLMSG_ALIGN(sizeof(genlhdr)));
    for (; (char*)attr < nlmsg.buf + offset + len;
         attr = (struct nlattr*)((char*)attr + NLMSG_ALIGN(attr->nla_len))) {
      if (attr->nla_type == DEVLINK_ATTR_NETDEV_NAME) {
        char* port_name;
        char netdev_name[IFNAMSIZ];
        port_name = (char*)(attr + 1);
        snprintf(netdev_name, sizeof(netdev_name), "%s%d", netdev_prefix,
                 netdev_index);
        netlink_device_change(&nlmsg2, rtsock, port_name, true, 0, 0, 0,
                              netdev_name);
        break;
      }
    }
    offset += len;
    netdev_index++;
  }
error:
  close(rtsock);
  close(sock);
}

#define DEV_IPV4 "172.20.20.%d"
#define DEV_IPV6 "fe80::%02x"
#define DEV_MAC 0x00aaaaaaaaaa

static void netdevsim_add(unsigned int addr, unsigned int port_count)
{
  char buf[16];
  sprintf(buf, "%u %u", addr, port_count);
  if (write_file("/sys/bus/netdevsim/new_device", buf)) {
    snprintf(buf, sizeof(buf), "netdevsim%d", addr);
    initialize_devlink_ports("netdevsim", buf, "netdevsim");
  }
}

#define WG_GENL_NAME "wireguard"
enum wg_cmd {
  WG_CMD_GET_DEVICE,
  WG_CMD_SET_DEVICE,
};
enum wgdevice_attribute {
  WGDEVICE_A_UNSPEC,
  WGDEVICE_A_IFINDEX,
  WGDEVICE_A_IFNAME,
  WGDEVICE_A_PRIVATE_KEY,
  WGDEVICE_A_PUBLIC_KEY,
  WGDEVICE_A_FLAGS,
  WGDEVICE_A_LISTEN_PORT,
  WGDEVICE_A_FWMARK,
  WGDEVICE_A_PEERS,
};
enum wgpeer_attribute {
  WGPEER_A_UNSPEC,
  WGPEER_A_PUBLIC_KEY,
  WGPEER_A_PRESHARED_KEY,
  WGPEER_A_FLAGS,
  WGPEER_A_ENDPOINT,
  WGPEER_A_PERSISTENT_KEEPALIVE_INTERVAL,
  WGPEER_A_LAST_HANDSHAKE_TIME,
  WGPEER_A_RX_BYTES,
  WGPEER_A_TX_BYTES,
  WGPEER_A_ALLOWEDIPS,
  WGPEER_A_PROTOCOL_VERSION,
};
enum wgallowedip_attribute {
  WGALLOWEDIP_A_UNSPEC,
  WGALLOWEDIP_A_FAMILY,
  WGALLOWEDIP_A_IPADDR,
  WGALLOWEDIP_A_CIDR_MASK,
};

static int netlink_wireguard_id_get(struct nlmsg* nlmsg, int sock)
{
  struct genlmsghdr genlhdr;
  memset(&genlhdr, 0, sizeof(genlhdr));
  genlhdr.cmd = CTRL_CMD_GETFAMILY;
  netlink_init(nlmsg, GENL_ID_CTRL, 0, &genlhdr, sizeof(genlhdr));
  netlink_attr(nlmsg, CTRL_ATTR_FAMILY_NAME, WG_GENL_NAME,
               strlen(WG_GENL_NAME) + 1);
  int n = 0;
  int err = netlink_send_ext(nlmsg, sock, GENL_ID_CTRL, &n);
  if (err) {
    return -1;
  }
  uint16_t id = 0;
  struct nlattr* attr = (struct nlattr*)(nlmsg->buf + NLMSG_HDRLEN +
                                         NLMSG_ALIGN(sizeof(genlhdr)));
  for (; (char*)attr < nlmsg->buf + n;
       attr = (struct nlattr*)((char*)attr + NLMSG_ALIGN(attr->nla_len))) {
    if (attr->nla_type == CTRL_ATTR_FAMILY_ID) {
      id = *(uint16_t*)(attr + 1);
      break;
    }
  }
  if (!id) {
    return -1;
  }
  recv(sock, nlmsg->buf, sizeof(nlmsg->buf), 0);
  return id;
}

static void netlink_wireguard_setup(void)
{
  const char ifname_a[] = "wg0";
  const char ifname_b[] = "wg1";
  const char ifname_c[] = "wg2";
  const char private_a[] = "\xa0\x5c\xa8\x4f\x6c\x9c\x8e\x38\x53\xe2\xfd\x7a"
                           "\x70\xae\x0f\xb2\x0f\xa1\x52\x60\x0c\xb0\x08\x45"
                           "\x17\x4f\x08\x07\x6f\x8d\x78\x43";
  const char private_b[] = "\xb0\x80\x73\xe8\xd4\x4e\x91\xe3\xda\x92\x2c\x22"
                           "\x43\x82\x44\xbb\x88\x5c\x69\xe2\x69\xc8\xe9\xd8"
                           "\x35\xb1\x14\x29\x3a\x4d\xdc\x6e";
  const char private_c[] = "\xa0\xcb\x87\x9a\x47\xf5\xbc\x64\x4c\x0e\x69\x3f"
                           "\xa6\xd0\x31\xc7\x4a\x15\x53\xb6\xe9\x01\xb9\xff"
                           "\x2f\x51\x8c\x78\x04\x2f\xb5\x42";
  const char public_a[] = "\x97\x5c\x9d\x81\xc9\x83\xc8\x20\x9e\xe7\x81\x25\x4b"
                          "\x89\x9f\x8e\xd9\x25\xae\x9f\x09\x23\xc2\x3c\x62\xf5"
                          "\x3c\x57\xcd\xbf\x69\x1c";
  const char public_b[] = "\xd1\x73\x28\x99\xf6\x11\xcd\x89\x94\x03\x4d\x7f\x41"
                          "\x3d\xc9\x57\x63\x0e\x54\x93\xc2\x85\xac\xa4\x00\x65"
                          "\xcb\x63\x11\xbe\x69\x6b";
  const char public_c[] = "\xf4\x4d\xa3\x67\xa8\x8e\xe6\x56\x4f\x02\x02\x11\x45"
                          "\x67\x27\x08\x2f\x5c\xeb\xee\x8b\x1b\xf5\xeb\x73\x37"
                          "\x34\x1b\x45\x9b\x39\x22";
  const uint16_t listen_a = 20001;
  const uint16_t listen_b = 20002;
  const uint16_t listen_c = 20003;
  const uint16_t af_inet = AF_INET;
  const uint16_t af_inet6 = AF_INET6;
  const struct sockaddr_in endpoint_b_v4 = {
      .sin_family = AF_INET,
      .sin_port = htons(listen_b),
      .sin_addr = {htonl(INADDR_LOOPBACK)}};
  const struct sockaddr_in endpoint_c_v4 = {
      .sin_family = AF_INET,
      .sin_port = htons(listen_c),
      .sin_addr = {htonl(INADDR_LOOPBACK)}};
  struct sockaddr_in6 endpoint_a_v6 = {.sin6_family = AF_INET6,
                                       .sin6_port = htons(listen_a)};
  endpoint_a_v6.sin6_addr = in6addr_loopback;
  struct sockaddr_in6 endpoint_c_v6 = {.sin6_family = AF_INET6,
                                       .sin6_port = htons(listen_c)};
  endpoint_c_v6.sin6_addr = in6addr_loopback;
  const struct in_addr first_half_v4 = {0};
  const struct in_addr second_half_v4 = {(uint32_t)htonl(128 << 24)};
  const struct in6_addr first_half_v6 = {{{0}}};
  const struct in6_addr second_half_v6 = {{{0x80}}};
  const uint8_t half_cidr = 1;
  const uint16_t persistent_keepalives[] = {1, 3, 7, 9, 14, 19};
  struct genlmsghdr genlhdr = {.cmd = WG_CMD_SET_DEVICE, .version = 1};
  int sock;
  int id, err;
  sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC);
  if (sock == -1) {
    return;
  }
  id = netlink_wireguard_id_get(&nlmsg, sock);
  if (id == -1)
    goto error;
  netlink_init(&nlmsg, id, 0, &genlhdr, sizeof(genlhdr));
  netlink_attr(&nlmsg, WGDEVICE_A_IFNAME, ifname_a, strlen(ifname_a) + 1);
  netlink_attr(&nlmsg, WGDEVICE_A_PRIVATE_KEY, private_a, 32);
  netlink_attr(&nlmsg, WGDEVICE_A_LISTEN_PORT, &listen_a, 2);
  netlink_nest(&nlmsg, NLA_F_NESTED | WGDEVICE_A_PEERS);
  netlink_nest(&nlmsg, NLA_F_NESTED | 0);
  netlink_attr(&nlmsg, WGPEER_A_PUBLIC_KEY, public_b, 32);
  netlink_attr(&nlmsg, WGPEER_A_ENDPOINT, &endpoint_b_v4,
               sizeof(endpoint_b_v4));
  netlink_attr(&nlmsg, WGPEER_A_PERSISTENT_KEEPALIVE_INTERVAL,
               &persistent_keepalives[0], 2);
  netlink_nest(&nlmsg, NLA_F_NESTED | WGPEER_A_ALLOWEDIPS);
  netlink_nest(&nlmsg, NLA_F_NESTED | 0);
  netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet, 2);
  netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &first_half_v4,
               sizeof(first_half_v4));
  netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1);
  netlink_done(&nlmsg);
  netlink_nest(&nlmsg, NLA_F_NESTED | 0);
  netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet6, 2);
  netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &first_half_v6,
               sizeof(first_half_v6));
  netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1);
  netlink_done(&nlmsg);
  netlink_done(&nlmsg);
  netlink_done(&nlmsg);
  netlink_nest(&nlmsg, NLA_F_NESTED | 0);
  netlink_attr(&nlmsg, WGPEER_A_PUBLIC_KEY, public_c, 32);
  netlink_attr(&nlmsg, WGPEER_A_ENDPOINT, &endpoint_c_v6,
               sizeof(endpoint_c_v6));
  netlink_attr(&nlmsg, WGPEER_A_PERSISTENT_KEEPALIVE_INTERVAL,
               &persistent_keepalives[1], 2);
  netlink_nest(&nlmsg, NLA_F_NESTED | WGPEER_A_ALLOWEDIPS);
  netlink_nest(&nlmsg, NLA_F_NESTED | 0);
  netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet, 2);
  netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &second_half_v4,
               sizeof(second_half_v4));
  netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1);
  netlink_done(&nlmsg);
  netlink_nest(&nlmsg, NLA_F_NESTED | 0);
  netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet6, 2);
  netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &second_half_v6,
               sizeof(second_half_v6));
  netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1);
  netlink_done(&nlmsg);
  netlink_done(&nlmsg);
  netlink_done(&nlmsg);
  netlink_done(&nlmsg);
  err = netlink_send(&nlmsg, sock);
  if (err) {
  }
  netlink_init(&nlmsg, id, 0, &genlhdr, sizeof(genlhdr));
  netlink_attr(&nlmsg, WGDEVICE_A_IFNAME, ifname_b, strlen(ifname_b) + 1);
  netlink_attr(&nlmsg, WGDEVICE_A_PRIVATE_KEY, private_b, 32);
  netlink_attr(&nlmsg, WGDEVICE_A_LISTEN_PORT, &listen_b, 2);
  netlink_nest(&nlmsg, NLA_F_NESTED | WGDEVICE_A_PEERS);
  netlink_nest(&nlmsg, NLA_F_NESTED | 0);
  netlink_attr(&nlmsg, WGPEER_A_PUBLIC_KEY, public_a, 32);
  netlink_attr(&nlmsg, WGPEER_A_ENDPOINT, &endpoint_a_v6,
               sizeof(endpoint_a_v6));
  netlink_attr(&nlmsg, WGPEER_A_PERSISTENT_KEEPALIVE_INTERVAL,
               &persistent_keepalives[2], 2);
  netlink_nest(&nlmsg, NLA_F_NESTED | WGPEER_A_ALLOWEDIPS);
  netlink_nest(&nlmsg, NLA_F_NESTED | 0);
  netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet, 2);
  netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &first_half_v4,
               sizeof(first_half_v4));
  netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1);
  netlink_done(&nlmsg);
  netlink_nest(&nlmsg, NLA_F_NESTED | 0);
  netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet6, 2);
  netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &first_half_v6,
               sizeof(first_half_v6));
  netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1);
  netlink_done(&nlmsg);
  netlink_done(&nlmsg);
  netlink_done(&nlmsg);
  netlink_nest(&nlmsg, NLA_F_NESTED | 0);
  netlink_attr(&nlmsg, WGPEER_A_PUBLIC_KEY, public_c, 32);
  netlink_attr(&nlmsg, WGPEER_A_ENDPOINT, &endpoint_c_v4,
               sizeof(endpoint_c_v4));
  netlink_attr(&nlmsg, WGPEER_A_PERSISTENT_KEEPALIVE_INTERVAL,
               &persistent_keepalives[3], 2);
  netlink_nest(&nlmsg, NLA_F_NESTED | WGPEER_A_ALLOWEDIPS);
  netlink_nest(&nlmsg, NLA_F_NESTED | 0);
  netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet, 2);
  netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &second_half_v4,
               sizeof(second_half_v4));
  netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1);
  netlink_done(&nlmsg);
  netlink_nest(&nlmsg, NLA_F_NESTED | 0);
  netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet6, 2);
  netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &second_half_v6,
               sizeof(second_half_v6));
  netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1);
  netlink_done(&nlmsg);
  netlink_done(&nlmsg);
  netlink_done(&nlmsg);
  netlink_done(&nlmsg);
  err = netlink_send(&nlmsg, sock);
  if (err) {
  }
  netlink_init(&nlmsg, id, 0, &genlhdr, sizeof(genlhdr));
  netlink_attr(&nlmsg, WGDEVICE_A_IFNAME, ifname_c, strlen(ifname_c) + 1);
  netlink_attr(&nlmsg, WGDEVICE_A_PRIVATE_KEY, private_c, 32);
  netlink_attr(&nlmsg, WGDEVICE_A_LISTEN_PORT, &listen_c, 2);
  netlink_nest(&nlmsg, NLA_F_NESTED | WGDEVICE_A_PEERS);
  netlink_nest(&nlmsg, NLA_F_NESTED | 0);
  netlink_attr(&nlmsg, WGPEER_A_PUBLIC_KEY, public_a, 32);
  netlink_attr(&nlmsg, WGPEER_A_ENDPOINT, &endpoint_a_v6,
               sizeof(endpoint_a_v6));
  netlink_attr(&nlmsg, WGPEER_A_PERSISTENT_KEEPALIVE_INTERVAL,
               &persistent_keepalives[4], 2);
  netlink_nest(&nlmsg, NLA_F_NESTED | WGPEER_A_ALLOWEDIPS);
  netlink_nest(&nlmsg, NLA_F_NESTED | 0);
  netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet, 2);
  netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &first_half_v4,
               sizeof(first_half_v4));
  netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1);
  netlink_done(&nlmsg);
  netlink_nest(&nlmsg, NLA_F_NESTED | 0);
  netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet6, 2);
  netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &first_half_v6,
               sizeof(first_half_v6));
  netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1);
  netlink_done(&nlmsg);
  netlink_done(&nlmsg);
  netlink_done(&nlmsg);
  netlink_nest(&nlmsg, NLA_F_NESTED | 0);
  netlink_attr(&nlmsg, WGPEER_A_PUBLIC_KEY, public_b, 32);
  netlink_attr(&nlmsg, WGPEER_A_ENDPOINT, &endpoint_b_v4,
               sizeof(endpoint_b_v4));
  netlink_attr(&nlmsg, WGPEER_A_PERSISTENT_KEEPALIVE_INTERVAL,
               &persistent_keepalives[5], 2);
  netlink_nest(&nlmsg, NLA_F_NESTED | WGPEER_A_ALLOWEDIPS);
  netlink_nest(&nlmsg, NLA_F_NESTED | 0);
  netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet, 2);
  netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &second_half_v4,
               sizeof(second_half_v4));
  netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1);
  netlink_done(&nlmsg);
  netlink_nest(&nlmsg, NLA_F_NESTED | 0);
  netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet6, 2);
  netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &second_half_v6,
               sizeof(second_half_v6));
  netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1);
  netlink_done(&nlmsg);
  netlink_done(&nlmsg);
  netlink_done(&nlmsg);
  netlink_done(&nlmsg);
  err = netlink_send(&nlmsg, sock);
  if (err) {
  }

error:
  close(sock);
}
static void initialize_netdevices(void)
{
  char netdevsim[16];
  sprintf(netdevsim, "netdevsim%d", (int)procid);
  struct {
    const char* type;
    const char* dev;
  } devtypes[] = {
      {"ip6gretap", "ip6gretap0"}, {"bridge", "bridge0"},
      {"vcan", "vcan0"},           {"bond", "bond0"},
      {"team", "team0"},           {"dummy", "dummy0"},
      {"nlmon", "nlmon0"},         {"caif", "caif0"},
      {"batadv", "batadv0"},       {"vxcan", "vxcan1"},
      {"netdevsim", netdevsim},    {"veth", 0},
      {"xfrm", "xfrm0"},           {"wireguard", "wg0"},
      {"wireguard", "wg1"},        {"wireguard", "wg2"},
  };
  const char* devmasters[] = {"bridge", "bond", "team", "batadv"};
  struct {
    const char* name;
    int macsize;
    bool noipv6;
  } devices[] = {
      {"lo", ETH_ALEN},
      {"sit0", 0},
      {"bridge0", ETH_ALEN},
      {"vcan0", 0, true},
      {"tunl0", 0},
      {"gre0", 0},
      {"gretap0", ETH_ALEN},
      {"ip_vti0", 0},
      {"ip6_vti0", 0},
      {"ip6tnl0", 0},
      {"ip6gre0", 0},
      {"ip6gretap0", ETH_ALEN},
      {"erspan0", ETH_ALEN},
      {"bond0", ETH_ALEN},
      {"veth0", ETH_ALEN},
      {"veth1", ETH_ALEN},
      {"team0", ETH_ALEN},
      {"veth0_to_bridge", ETH_ALEN},
      {"veth1_to_bridge", ETH_ALEN},
      {"veth0_to_bond", ETH_ALEN},
      {"veth1_to_bond", ETH_ALEN},
      {"veth0_to_team", ETH_ALEN},
      {"veth1_to_team", ETH_ALEN},
      {"veth0_to_hsr", ETH_ALEN},
      {"veth1_to_hsr", ETH_ALEN},
      {"hsr0", 0},
      {"dummy0", ETH_ALEN},
      {"nlmon0", 0},
      {"vxcan0", 0, true},
      {"vxcan1", 0, true},
      {"caif0", ETH_ALEN},
      {"batadv0", ETH_ALEN},
      {netdevsim, ETH_ALEN},
      {"xfrm0", ETH_ALEN},
      {"veth0_virt_wifi", ETH_ALEN},
      {"veth1_virt_wifi", ETH_ALEN},
      {"virt_wifi0", ETH_ALEN},
      {"veth0_vlan", ETH_ALEN},
      {"veth1_vlan", ETH_ALEN},
      {"vlan0", ETH_ALEN},
      {"vlan1", ETH_ALEN},
      {"macvlan0", ETH_ALEN},
      {"macvlan1", ETH_ALEN},
      {"ipvlan0", ETH_ALEN},
      {"ipvlan1", ETH_ALEN},
      {"veth0_macvtap", ETH_ALEN},
      {"veth1_macvtap", ETH_ALEN},
      {"macvtap0", ETH_ALEN},
      {"macsec0", ETH_ALEN},
      {"veth0_to_batadv", ETH_ALEN},
      {"veth1_to_batadv", ETH_ALEN},
      {"batadv_slave_0", ETH_ALEN},
      {"batadv_slave_1", ETH_ALEN},
      {"geneve0", ETH_ALEN},
      {"geneve1", ETH_ALEN},
      {"wg0", 0},
      {"wg1", 0},
      {"wg2", 0},
  };
  int sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
  if (sock == -1)
    exit(1);
  unsigned i;
  for (i = 0; i < sizeof(devtypes) / sizeof(devtypes[0]); i++)
    netlink_add_device(&nlmsg, sock, devtypes[i].type, devtypes[i].dev);
  for (i = 0; i < sizeof(devmasters) / (sizeof(devmasters[0])); i++) {
    char master[32], slave0[32], veth0[32], slave1[32], veth1[32];
    sprintf(slave0, "%s_slave_0", devmasters[i]);
    sprintf(veth0, "veth0_to_%s", devmasters[i]);
    netlink_add_veth(&nlmsg, sock, slave0, veth0);
    sprintf(slave1, "%s_slave_1", devmasters[i]);
    sprintf(veth1, "veth1_to_%s", devmasters[i]);
    netlink_add_veth(&nlmsg, sock, slave1, veth1);
    sprintf(master, "%s0", devmasters[i]);
    netlink_device_change(&nlmsg, sock, slave0, false, master, 0, 0, NULL);
    netlink_device_change(&nlmsg, sock, slave1, false, master, 0, 0, NULL);
  }
  netlink_device_change(&nlmsg, sock, "bridge_slave_0", true, 0, 0, 0, NULL);
  netlink_device_change(&nlmsg, sock, "bridge_slave_1", true, 0, 0, 0, NULL);
  netlink_add_veth(&nlmsg, sock, "hsr_slave_0", "veth0_to_hsr");
  netlink_add_veth(&nlmsg, sock, "hsr_slave_1", "veth1_to_hsr");
  netlink_add_hsr(&nlmsg, sock, "hsr0", "hsr_slave_0", "hsr_slave_1");
  netlink_device_change(&nlmsg, sock, "hsr_slave_0", true, 0, 0, 0, NULL);
  netlink_device_change(&nlmsg, sock, "hsr_slave_1", true, 0, 0, 0, NULL);
  netlink_add_veth(&nlmsg, sock, "veth0_virt_wifi", "veth1_virt_wifi");
  netlink_add_linked(&nlmsg, sock, "virt_wifi", "virt_wifi0",
                     "veth1_virt_wifi");
  netlink_add_veth(&nlmsg, sock, "veth0_vlan", "veth1_vlan");
  netlink_add_vlan(&nlmsg, sock, "vlan0", "veth0_vlan", 0, htons(ETH_P_8021Q));
  netlink_add_vlan(&nlmsg, sock, "vlan1", "veth0_vlan", 1, htons(ETH_P_8021AD));
  netlink_add_macvlan(&nlmsg, sock, "macvlan0", "veth1_vlan");
  netlink_add_macvlan(&nlmsg, sock, "macvlan1", "veth1_vlan");
  netlink_add_ipvlan(&nlmsg, sock, "ipvlan0", "veth0_vlan", IPVLAN_MODE_L2, 0);
  netlink_add_ipvlan(&nlmsg, sock, "ipvlan1", "veth0_vlan", IPVLAN_MODE_L3S,
                     IPVLAN_F_VEPA);
  netlink_add_veth(&nlmsg, sock, "veth0_macvtap", "veth1_macvtap");
  netlink_add_linked(&nlmsg, sock, "macvtap", "macvtap0", "veth0_macvtap");
  netlink_add_linked(&nlmsg, sock, "macsec", "macsec0", "veth1_macvtap");
  char addr[32];
  sprintf(addr, DEV_IPV4, 14 + 10);
  struct in_addr geneve_addr4;
  if (inet_pton(AF_INET, addr, &geneve_addr4) <= 0)
    exit(1);
  struct in6_addr geneve_addr6;
  if (inet_pton(AF_INET6, "fc00::01", &geneve_addr6) <= 0)
    exit(1);
  netlink_add_geneve(&nlmsg, sock, "geneve0", 0, &geneve_addr4, 0);
  netlink_add_geneve(&nlmsg, sock, "geneve1", 1, 0, &geneve_addr6);
  netdevsim_add((int)procid, 4);
  netlink_wireguard_setup();
  for (i = 0; i < sizeof(devices) / (sizeof(devices[0])); i++) {
    char addr[32];
    sprintf(addr, DEV_IPV4, i + 10);
    netlink_add_addr4(&nlmsg, sock, devices[i].name, addr);
    if (!devices[i].noipv6) {
      sprintf(addr, DEV_IPV6, i + 10);
      netlink_add_addr6(&nlmsg, sock, devices[i].name, addr);
    }
    uint64_t macaddr = DEV_MAC + ((i + 10ull) << 40);
    netlink_device_change(&nlmsg, sock, devices[i].name, true, 0, &macaddr,
                          devices[i].macsize, NULL);
  }
  close(sock);
}
static void initialize_netdevices_init(void)
{
  int sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
  if (sock == -1)
    exit(1);
  struct {
    const char* type;
    int macsize;
    bool noipv6;
    bool noup;
  } devtypes[] = {
      {"nr", 7, true}, {"rose", 5, true, true},
  };
  unsigned i;
  for (i = 0; i < sizeof(devtypes) / sizeof(devtypes[0]); i++) {
    char dev[32], addr[32];
    sprintf(dev, "%s%d", devtypes[i].type, (int)procid);
    sprintf(addr, "172.30.%d.%d", i, (int)procid + 1);
    netlink_add_addr4(&nlmsg, sock, dev, addr);
    if (!devtypes[i].noipv6) {
      sprintf(addr, "fe88::%02x:%02x", i, (int)procid + 1);
      netlink_add_addr6(&nlmsg, sock, dev, addr);
    }
    int macsize = devtypes[i].macsize;
    uint64_t macaddr = 0xbbbbbb +
                       ((unsigned long long)i << (8 * (macsize - 2))) +
                       (procid << (8 * (macsize - 1)));
    netlink_device_change(&nlmsg, sock, dev, !devtypes[i].noup, 0, &macaddr,
                          macsize, NULL);
  }
  close(sock);
}

#define MAX_FDS 30

static long syz_open_dev(volatile long a0, volatile long a1, volatile long a2)
{
  if (a0 == 0xc || a0 == 0xb) {
    char buf[128];
    sprintf(buf, "/dev/%s/%d:%d", a0 == 0xc ? "char" : "block", (uint8_t)a1,
            (uint8_t)a2);
    return open(buf, O_RDWR, 0);
  } else {
    char buf[1024];
    char* hash;
    strncpy(buf, (char*)a0, sizeof(buf) - 1);
    buf[sizeof(buf) - 1] = 0;
    while ((hash = strchr(buf, '#'))) {
      *hash = '0' + (char)(a1 % 10);
      a1 /= 10;
    }
    return open(buf, a2, 0);
  }
}

#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 {
  uint8_t type;
  uint8_t opcode;
  uint16_t id;
};

#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

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 = 241;
  if (dup2(vhci_fd, kVhciFd) < 0)
    exit(1);
  close(vhci_fd);
  vhci_fd = kVhciFd;
  struct vhci_vendor_pkt vendor_pkt;
  if (read(vhci_fd, &vendor_pkt, sizeof(vendor_pkt)) != sizeof(vendor_pkt))
    exit(1);
  if (vendor_pkt.type != HCI_VENDOR_PKT)
    exit(1);
  pthread_t th;
  if (pthread_create(&th, NULL, event_thread, NULL))
    exit(1);
  int ret = ioctl(hci_sock, HCIDEVUP, vendor_pkt.id);
  if (ret) {
    if (errno == ERFKILL) {
      rfkill_unblock_all();
      ret = ioctl(hci_sock, HCIDEVUP, vendor_pkt.id);
    }
    if (ret && errno != EALREADY)
      exit(1);
  }
  struct hci_dev_req dr = {0};
  dr.dev_id = vendor_pkt.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_cgroups()
{
  if (mkdir("/syzcgroup", 0777)) {
  }
  if (mkdir("/syzcgroup/unified", 0777)) {
  }
  if (mount("none", "/syzcgroup/unified", "cgroup2", 0, NULL)) {
  }
  if (chmod("/syzcgroup/unified", 0777)) {
  }
  write_file("/syzcgroup/unified/cgroup.subtree_control",
             "+cpu +memory +io +pids +rdma");
  if (mkdir("/syzcgroup/cpu", 0777)) {
  }
  if (mount("none", "/syzcgroup/cpu", "cgroup", 0,
            "cpuset,cpuacct,perf_event,hugetlb")) {
  }
  write_file("/syzcgroup/cpu/cgroup.clone_children", "1");
  write_file("/syzcgroup/cpu/cpuset.memory_pressure_enabled", "1");
  if (chmod("/syzcgroup/cpu", 0777)) {
  }
  if (mkdir("/syzcgroup/net", 0777)) {
  }
  if (mount("none", "/syzcgroup/net", "cgroup", 0,
            "net_cls,net_prio,devices,freezer")) {
  }
  if (chmod("/syzcgroup/net", 0777)) {
  }
}

static void setup_cgroups_loop()
{
  int pid = getpid();
  char file[128];
  char cgroupdir[64];
  snprintf(cgroupdir, sizeof(cgroupdir), "/syzcgroup/unified/syz%llu", procid);
  if (mkdir(cgroupdir, 0777)) {
  }
  snprintf(file, sizeof(file), "%s/pids.max", cgroupdir);
  write_file(file, "32");
  snprintf(file, sizeof(file), "%s/memory.low", cgroupdir);
  write_file(file, "%d", 298 << 20);
  snprintf(file, sizeof(file), "%s/memory.high", cgroupdir);
  write_file(file, "%d", 299 << 20);
  snprintf(file, sizeof(file), "%s/memory.max", cgroupdir);
  write_file(file, "%d", 300 << 20);
  snprintf(file, sizeof(file), "%s/cgroup.procs", cgroupdir);
  write_file(file, "%d", pid);
  snprintf(cgroupdir, sizeof(cgroupdir), "/syzcgroup/cpu/syz%llu", procid);
  if (mkdir(cgroupdir, 0777)) {
  }
  snprintf(file, sizeof(file), "%s/cgroup.procs", cgroupdir);
  write_file(file, "%d", pid);
  snprintf(cgroupdir, sizeof(cgroupdir), "/syzcgroup/net/syz%llu", procid);
  if (mkdir(cgroupdir, 0777)) {
  }
  snprintf(file, sizeof(file), "%s/cgroup.procs", cgroupdir);
  write_file(file, "%d", pid);
}

static void setup_cgroups_test()
{
  char cgroupdir[64];
  snprintf(cgroupdir, sizeof(cgroupdir), "/syzcgroup/unified/syz%llu", procid);
  if (symlink(cgroupdir, "./cgroup")) {
  }
  snprintf(cgroupdir, sizeof(cgroupdir), "/syzcgroup/cpu/syz%llu", procid);
  if (symlink(cgroupdir, "./cgroup.cpu")) {
  }
  snprintf(cgroupdir, sizeof(cgroupdir), "/syzcgroup/net/syz%llu", procid);
  if (symlink(cgroupdir, "./cgroup.net")) {
  }
}

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

static void loop();

static void sandbox_common()
{
  prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
  setpgrp();
  setsid();
  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 = 0;
  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);
  setup_common();
  initialize_vhci();
  sandbox_common();
  drop_caps();
  initialize_netdevices_init();
  if (unshare(CLONE_NEWNET)) {
  }
  initialize_netdevices();
  loop();
  exit(1);
}

#define FS_IOC_SETFLAGS _IOW('f', 2, long)
static void remove_dir(const char* dir)
{
  int iter = 0;
  DIR* dp = 0;
retry:
  while (umount2(dir, MNT_DETACH) == 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, MNT_DETACH) == 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, MNT_DETACH))
        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, MNT_DETACH))
          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_loop()
{
  setup_cgroups_loop();
}

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

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

static void setup_binfmt_misc()
{
  if (mount(0, "/proc/sys/fs/binfmt_misc", "binfmt_misc", 0, 0)) {
  }
  write_file("/proc/sys/fs/binfmt_misc/register", ":syz0:M:0:\x01::./file0:");
  write_file("/proc/sys/fs/binfmt_misc/register",
             ":syz1:M:1:\x02::./file0:POC");
}

struct thread_t {
  int created, call;
  event_t ready, done;
};

static struct thread_t threads[16];
static void execute_call(int call);
static int running;

static void* thr(void* arg)
{
  struct thread_t* th = (struct thread_t*)arg;
  for (;;) {
    event_wait(&th->ready);
    event_reset(&th->ready);
    execute_call(th->call);
    __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED);
    event_set(&th->done);
  }
  return 0;
}

static void execute_one(void)
{
  int i, call, thread;
  for (call = 0; call < 6; call++) {
    for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0]));
         thread++) {
      struct thread_t* th = &threads[thread];
      if (!th->created) {
        th->created = 1;
        event_init(&th->ready);
        event_init(&th->done);
        event_set(&th->done);
        thread_start(thr, th);
      }
      if (!event_isset(&th->done))
        continue;
      event_reset(&th->done);
      th->call = call;
      __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED);
      event_set(&th->ready);
      event_timedwait(&th->done, 45);
      break;
    }
  }
  for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++)
    sleep_ms(1);
  close_fds();
}

static void execute_one(void);

#define WAIT_FLAGS __WALL

static void loop(void)
{
  setup_loop();
  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();
      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 < 5 * 1000)
        continue;
      kill_and_wait(pid, &status);
      break;
    }
    remove_dir(cwdbuf);
  }
}

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

void execute_call(int call)
{
  intptr_t res = 0;
  switch (call) {
  case 0:
    NONFAILING(memcpy((void*)0x20000180, "/dev/fb0\000", 9));
    res = syscall(__NR_openat, 0xffffffffffffff9cul, 0x20000180ul, 0ul, 0ul);
    if (res != -1)
      r[0] = res;
    break;
  case 1:
    NONFAILING(*(uint32_t*)0x20000000 = 0x400);
    NONFAILING(*(uint32_t*)0x20000004 = 0);
    NONFAILING(*(uint32_t*)0x20000008 = 0);
    NONFAILING(*(uint32_t*)0x2000000c = 0xf0);
    NONFAILING(*(uint32_t*)0x20000010 = 0);
    NONFAILING(*(uint32_t*)0x20000014 = 0);
    NONFAILING(*(uint32_t*)0x20000018 = 4);
    NONFAILING(*(uint32_t*)0x2000001c = 0);
    NONFAILING(*(uint32_t*)0x20000020 = 0);
    NONFAILING(*(uint32_t*)0x20000024 = 0);
    NONFAILING(*(uint32_t*)0x20000028 = 0);
    NONFAILING(*(uint32_t*)0x2000002c = 0);
    NONFAILING(*(uint32_t*)0x20000030 = 0);
    NONFAILING(*(uint32_t*)0x20000034 = 0);
    NONFAILING(*(uint32_t*)0x20000038 = 0);
    NONFAILING(*(uint32_t*)0x2000003c = 0);
    NONFAILING(*(uint32_t*)0x20000040 = 0);
    NONFAILING(*(uint32_t*)0x20000044 = 0);
    NONFAILING(*(uint32_t*)0x20000048 = 0);
    NONFAILING(*(uint32_t*)0x2000004c = 0);
    NONFAILING(*(uint32_t*)0x20000050 = 3);
    NONFAILING(*(uint32_t*)0x20000054 = 0);
    NONFAILING(*(uint32_t*)0x20000058 = 0);
    NONFAILING(*(uint32_t*)0x2000005c = 0);
    NONFAILING(*(uint32_t*)0x20000060 = 0);
    NONFAILING(*(uint32_t*)0x20000064 = 0);
    NONFAILING(*(uint32_t*)0x20000068 = 0);
    NONFAILING(*(uint32_t*)0x2000006c = 0);
    NONFAILING(*(uint32_t*)0x20000070 = 0);
    NONFAILING(*(uint32_t*)0x20000074 = 0);
    NONFAILING(*(uint32_t*)0x20000078 = 0);
    NONFAILING(*(uint32_t*)0x2000007c = 0);
    NONFAILING(*(uint32_t*)0x20000080 = 0);
    NONFAILING(*(uint32_t*)0x20000084 = 6);
    NONFAILING(*(uint32_t*)0x20000088 = 0);
    NONFAILING(*(uint32_t*)0x2000008c = 0);
    NONFAILING(*(uint32_t*)0x20000090 = 0);
    NONFAILING(*(uint32_t*)0x20000094 = 0);
    NONFAILING(*(uint32_t*)0x20000098 = 0);
    NONFAILING(*(uint32_t*)0x2000009c = 0);
    syscall(__NR_ioctl, r[0], 0x4601, 0x20000000ul);
    break;
  case 2:
    syscall(__NR_socketpair, 1ul, 5ul, 0, 0x20000000ul);
    break;
  case 3:
    res = -1;
    NONFAILING(res = syz_open_dev(0xc, 4, 1));
    if (res != -1)
      r[1] = res;
    break;
  case 4:
    res = syscall(__NR_dup, r[1]);
    if (res != -1)
      r[2] = res;
    break;
  case 5:
    NONFAILING(*(uint32_t*)0x20001440 = 8);
    NONFAILING(memcpy(
        (void*)0x20001444,
        "\xa2\xe3\xad\x21\xed\x6b\x52\xf9\x9c\xfb\xf4\xc0\x87\xf7\x19\xb4\xd0"
        "\x4f\xe7\xff\x7f\xc6\xe5\x53\x9b\x63\x6e\x0e\x8b\x54\x6a\x9b\x37\x60"
        "\x94\x37\x08\x90\xe0\x87\x8f\xdb\x1a\xc6\xe7\x04\x9b\x61\xb4\x95\x6c"
        "\x40\x9a\x47\x2a\x5b\x67\xf3\x98\x8f\x7e\xf3\x19\x52\xa9\x81\xff\xe8"
        "\xd1\x78\x70\x8c\x52\x3c\x92\x1b\x1b\x4d\x4b\x0a\x16\x9b\x58\xd3\x36"
        "\xcd\x3b\x78\x13\x0d\xaa\x61\xd8\xe8\x09\xea\x88\x2f\x58\x02\xb7\x7f"
        "\x07\x22\x72\x27\xb7\xba\x67\xe0\xe7\x86\x57\xa6\xf5\xc2\xa8\x74\xe6"
        "\x2a\x9c\xcd\xc0\xd3\x1a\x0c\x9f\x31\x8c\x0d\xa1\x99\x3b\xd1\x60\xe2"
        "\x33\xdf\x4a\x62\x17\x9c\x6f\x30\x9f\x4c\xff\x77\x38\x59\x6e\xca\xe8"
        "\x70\x7c\xe0\x65\xcd\x5b\x91\xcd\x0a\xe1\x93\x97\x37\x35\xb3\x6d\x5b"
        "\x1b\x63\xe9\x1c\x00\x30\x5d\x3f\x46\x63\x5e\xb0\x16\xd5\xb1\xdd\xa9"
        "\x8e\x2d\x74\x9b\xe7\xbd\x1d\xf1\xfb\x3b\x23\x1f\xdc\xdb\x50\x75\xa9"
        "\xaa\xa1\xb4\x69\xc3\x09\x00\x00\x00\x00\x00\x00\x00\x75\x27\x1b\x28"
        "\x63\x29\xd1\x69\x93\x42\x88\xfd\x78\x9a\xa3\x7d\x6e\x98\xb2\x24\xfd"
        "\x44\xb6\x5b\x31\x33\x4f\xfc\x55\xcc\x82\xcd\x3a\xc3\x2e\xcd\x03\xad"
        "\xed\x6f\x90\x81\xb4\xdd\x0d\x8b\x38\xf3\xcd\x44\x98\xbe\xe8\x00\x49"
        "\x08\x41\xbd\xb1\x14\xf6\xb7\x63\x83\x70\x9d\x8f\x5c\x55\x43\x2a\x90"
        "\x9f\xda\x03\x9a\xec\x54\xa1\x23\x6e\x80\xf6\xa8\xab\xad\xea\x76\x62"
        "\x49\x6b\xdd\xbb\x42\xbe\x6b\xfb\x2f\x17\x95\x9d\x1f\x41\x6e\x56\xc7"
        "\x1b\x19\x31\x87\x02\x62\xf5\xe8\x01\x11\x92\x42\xca\x5b\x6b\xfc\x82"
        "\x1e\x7e\x7d\xaf\x24\x51\x13\x8e\x64\x5b\xb8\x0c\x61\x76\x69\x31\x4e"
        "\x2f\xbe\x70\xde\x98\xec\x76\xa9\xe4\x0d\xad\x47\xf3\x6f\xd9\xf7\xd0"
        "\xd4\x2a\x4b\x5f\x11\x85\xcc\xdc\xf1\x6f\xf4\x62\x95\xd8\xa0\xfa\x17"
        "\x71\x3c\x58\x02\x63\x09\x33\xa9\xa3\x4a\xf6\x74\xf3\xf3\x9f\xe2\x34"
        "\x91\x23\x7c\x08\x82\x2d\xec\x11\x09\x11\xe8\x93\xd0\xa8\xc4\xf6\x77"
        "\x74\x7a\xbc\x36\x09\x34\xb8\x29\x10\xff\x85\xbf\xd9\x95\x08\x3b\xba"
        "\x29\x87\xa6\x73\x99\xea\xc4\x27\xd1\x45\xd5\x46\xa4\x0b\x9f\x6f\xf1"
        "\x4a\xc4\x88\xec\x13\x0f\xb3\x85\x0a\x27\xaf\xc9\x53\x85\x4a\x64\x2c"
        "\x57\x51\x95\x44\xae\x15\xa7\xe4\x54\xde\xa0\x59\x18\xb4\x12\x43\x51"
        "\x60\x16\x11\xc8\xf1\x1b\xaa\x50\x0a\x36\x21\xc5\x6c\xea\x8d\x20\xff"
        "\x91\x1a\x0c\x41\xdb\x6e\xbe\x8c\xac\x64\xf1\x76\x79\x14\x1d\x54\xb3"
        "\x4b\xbc\x99\x63\xac\x4f\x4b\xb3\x30\x96\x03\xf1\xd4\xab\x96\x62\x03"
        "\x86\x1b\x5b\x15\xa8\x41\xf2\xb5\x75\xa8\xbd\x0d\x78\x24\x8e\xbe\x4d"
        "\x9a\x80\x00\x26\x95\x10\x4f\x67\x4c\x24\x31\xdc\xa1\x41\xfa\xe2\x69"
        "\xca\xb7\x0e\x9a\x66\xf3\xc3\xa9\xa6\x3e\x96\x39\xe1\xf5\x9c\x0e\xde"
        "\x26\xc6\xb5\xd7\x4b\x07\x8a\x5e\x15\xc3\x16\x34\xe5\xae\x09\x8c\xe9"
        "\xee\x70\x77\x1a\xaa\x18\x11\x9a\x86\x7e\x10\x88\x33\x49\x75\xe9\xf7"
        "\x34\x83\xb6\xa6\x2f\xa6\x78\xca\x14\xff\xd9\xf9\xdb\x2a\x78\x69\xd8"
        "\x58\x64\x05\x65\x26\xf8\x89\xaf\x43\xa6\x05\x60\xa2\x2f\x1f\xca\x56"
        "\x7e\x65\xd5\xe8\x80\x57\x22\x86\x52\x24\x49\xdf\x46\x6c\x63\x2b\x35"
        "\x70\x24\x3f\x98\x9c\xce\x38\x03\xf4\x65\xe4\x1e\x61\x0c\x20\xd8\x04"
        "\x21\xd6\x53\xa5\x12\x00\x00\x00\x82\x13\xb7\x04\xc7\xfb\x08\x2f\xf2"
        "\x75\x90\x67\x8e\xf9\xf1\x90\xba\xe9\x79\xba\xbc\x70\x41\xd8\x60\x42"
        "\x0c\x56\x64\xba\x79\x21\xb1\x4d\xc1\xdb\x88\x92\xfd\x32\xd0\xad\x7b"
        "\xc9\x46\x81\x35\x91\xad\x8d\xef\xf4\xb0\x5f\x60\xce\xa0\xda\x77\x10"
        "\xac\x00\x00\x00\x00\x00\x00\x80\x00\xbe\xa3\x7c\xe0\xd0\xd4\xaa\x20"
        "\x2f\xef\x59\x52\xa5\x39\x1f\xd5\x61\x5d\x42\x9a\x04\xa6\x89\xb8\x3c"
        "\x70\x68\xae\x94\x9e\xd0\x6e\x28\x8e\x81\x0b\xac\x9c\x76\x60\x00\x25"
        "\xe1\x9c\x90\x7f\x8e\xa2\xe2\xf0\x5d\xd3\x31\x82\x71\xa1\xf5\xf8\x52"
        "\x8f\x22\x7e\x79\xc1\x38\x8d\xbd\xff\xfe\x49\x2f\x21\x57\x9d\x2c\x15"
        "\xb8\xc7\x0c\xdb\x1c\x33\x2d\x86\xd8\x73\x41\x43\x27\x50\x86\x1e\xc2"
        "\xbc\x34\x51\xed\xca\x19\x4b\x22\x1c\xfe\xc4\x60\x3d\x27\x6b\xba\xa1"
        "\xdf\xa6\xd4\xfb\x8a\x48\xa7\x6e\xef\xc9\xa9\xa0\x27\x0e\x4c\x10\xd6"
        "\x4c\xd5\xa6\x24\x27\x26\x4f\x23\x77\xfe\x76\x3c\x43\x47\x08\x33\xac"
        "\x96\xc4\x5f\x35\x7c\xbb\xab\xa8\xf1\xb1\xfd\xcc\x7c\xbb\x61\xa7\xcd"
        "\xb9\x74\x4e\xd7\xf9\x12\x9a\xed\xe2\xbe\x21\xcc\xfd\xc4\xe9\x13\x4f"
        "\x86\x84\xb3\xa4\xf3\x54\xda\x9a\x79\x5e\x96\x33\x4e\x20\x7d\xff\x70"
        "\xf1\x98\x80\x37\xb2\xed\x3a\xaf\x57\x5c\x0b\x88\xd8\xf1\x46\x68\x40"
        "\x78\x41\x6d\x59\xfd\xee\x53\x25\x92\x89\x74\xd1\x2d\xad\x99\xda\xc4"
        "\x4c\x3f\x00\x08\x04\x70\x96\xa4\x40\x60\xbe\xbc\x24\x20\xae\xd9\x2f"
        "\xa9\xb6\x57\x8b\x47\x79\x41\x5d\x97\xb9\xa6\xd6\xd5\x49\x5c\x11\x80"
        "\x45\x65\x1c\xf4\x1c\x2f\xc4\x8b\x77\x8e\xfa\x5e\xa5\x67\x77\x47\x43"
        "\x0a\xf4\x16\x2b\x98\x7b\x80\xc3\xe0\x01\xcd\x34\xe5\xc9\x2f\x76\xcc"
        "\x4c\x24\xee\xb8\xbc\x4e\x9a\xc2\xae\xd9\xe5\x38\x03\xed\x0c\xa4\xae"
        "\x3a\x97\x37\xd2\x14\x06\x00\x05\xea\x6f\x17\x83\xe2\x87\xb3\xbe\xe9"
        "\x6e\x3a\x72\x88\xaf\xe2\xfd\xfa\xa7\x8d\x1f\x48\xc1\x3b\x64\xdf\x07"
        "\x84\x77\x54\xb8\x40\x0d\xaa\xa6\x9b\xf5\xc8\xf4\x8f\xe4\xea\xe9\xca"
        "\x12\x07\xe7\x82\x83\xcd\x0b\x20\xce\xb3\x60\xc7\xe6\x58\x82\x81\x63"
        "\xe2\xd2\x5c\x4a\xa3\x48\x56\x1f\x92\x7e\x88\xf6\x3a\xa7\x0e\x73\xa5"
        "\xe6\x9b\x3d\xf3\x49\x59\x03\xf0\x65\x72\xe1\xe0\x07\xfa\x55\xa2\x99"
        "\x9f\x59\x6d\x06\x73\x12\xf5\x77\x9e\x8d\xbf\xdc\xf3\x42\x71\x38\xf3"
        "\xd4\x44\xd2\x63\x9a\x10\x47\x7f\x9b\xec\x4b\x0b\xbb\x6e\x3c\x04\xbe"
        "\x68\x98\x1f\x39\x22\x03\xdd\x0e\xe3\xef\x47\x8e\x67\xd1\xd7\x23\x2f"
        "\x17\x69\x62\x94\x37\x8c\xe7\x16\xda\xcf\xc5\xe3\xe0\x3c\xf7\xab\x8e"
        "\x39\x02\xf1\xb0\xff\x03\x4e\xf6\x55\xb2\x53\xca\x50\x93\x83\x81\x5b"
        "\x1b\x6f\xc6\x52\x2d\x4e\x4f\xdc\x11\xa4\x8c\xf4\x2d\x48\x60\x46\x75"
        "\xfd\xe2\xb9\x4c\xf0\x2b\x98\xa2\x69\xb8\x91\xab\xf8\xab\x9c\x01\x50"
        "\x73\x01\x4d\x9e\x08\xd4\x33\x8b\x87\x80\xbd\xec\xd4\x36\xcf\x05\x41"
        "\x35\x9b\xaf\xff\xa4\x52\x37\xf1\x04\xb9\x62\x10\x40\x3b\x2d\xe9\xef"
        "\xed\xfd\x71\xaf\x94\x44\xe1\x97\xf4\x7e\x86\x61\x01\x49\x6f\x42\x35"
        "\x5b\xc7\x87\x2c\x82\x74\x67\xcf\xa5\xc4\xe7\x27\x30\xd5\x6b\xd0\x68"
        "\xed\x21\x1c\xf8\x47\x53\x5e\xde\xcb\x7b\x37\x3f\x78\xb0\x95\xb6\x84"
        "\x41\xa3\x4c\xb5\x16\x82\xa8\xae\x4d\x24\xad\x04\x65\xf7\x92\x7f\x88"
        "\x9b\x81\x30\x76\x03\x8e\x79\xa7\x96\x2f\xb3\x85\xa8\x82\xe8\x02\x0f"
        "\x06\xc4\xc2\xba\x1d\xd5\xca\xc7\xc1\x88\x76\xda\x86\x5d\x25\x87\x34"
        "\xdd\x73\x58\x3d\xf2\x92\x89\x24\x48\x03\x9e\xf7\x99\xcf\x06\x30\xbe"
        "\xcd\xcc\xe0\x45\x79\xb5\x56\x1d\xc8\x25\xab\x82\x98\x27\x94\x5e\x02"
        "\x0c\x1f\x67\xee\x61\x5f\x70\x84\xa6\x07\xa7\xec\xeb\x62\x43\x37\x8e"
        "\x06\x10\x06\x0f\x02\xcc\xa4\x05\x1c\x2f\x00\x1e\xdb\x3d\x78\xfb\x4b"
        "\x55\x66\x8d\xda\x93\xae\xc9\x2a\x5d\xe2\x03\x71\x7a\xa4\x9c\x2d\x28"
        "\x4a\xcf\xab\xe2\x62\xfc\xcf\xcb\xb2\xb7\x5a\x21\x83\xc4\xe1\x5a\x7b"
        "\x6e\xb6\x5c\xa8\x10\x4e\x1b\x4d\xa1\xfb\xb7\x7a\xb2\xfc\x04\x3a\xea"
        "\xd8\x7c\x32\xab\x87\x5e\xe7\xc2\xe7\xb7\x01\x9c\x90\x2c\xd3\xb4\x3e"
        "\xae\xb1\xa5\xfb\x13\x5c\x0c\x7d\xce\xe8\xfe\x65\x16\xa3\x28\x03\x2f"
        "\x88\xc0\x42\x89\x18\x24\x65\x9e\x9e\x94\x26\x5c\x80\x3b\x35\xee\x5f"
        "\x83\xa2\xb2\x10\x52\x01\x06\xb8\xa3\x58\xb5\x0a\xb7\xa1\xfa\x89\xaf"
        "\x9c\x25\x1f\xe5\x29\x4b\x3d\x18\x02\xd5\x67\x6d\x95\xf1\x60\xec\x97"
        "\xb1\xad\x94\x87\x41\xb2\x04\x46\x42\xc3\x7b\x4a\x6c\xc6\xc0\x4e\xff"
        "\xc1\x67\x2d\xb7\xe4\xb6\x8d\x78\x7d\x9a\x7a\x48\x3b\xf2\xaa\x74\xfc"
        "\x33\x57\xde\x50\xe8\xc7\x7d\x95\xa3\xd3\x61\xc0\x40\xba\xbb\x17\x16"
        "\x07\xca\xac\x2a\x35\x59\xad\x4f\x75\x46\x5f\x49\xc0\xd0\xae\x37\x16"
        "\xdb\x6e\x00\xcb\x11\xdb\x4a\x5f\xad\xe2\xa5\x7c\x10\x23\xbf\x70\xcc"
        "\x77\x73\x7c\x3b\x42\xaa\xe5\x01\xb2\x0f\x76\x94\xa0\x0f\x16\xe2\xd0"
        "\x17\x40\x35\xa2\xc2\x26\x56\xdc\x29\x88\x0a\xce\xbd\xbe\x8d\xdb\xd7"
        "\x5c\x2f\x99\x8d\x8a\xc2\xdf\xad\x2b\xa3\xa5\x04\x76\x7b\x6b\x45\xa4"
        "\x59\x57\xf2\x4d\x75\x8e\xd0\x24\xb3\x84\x9c\x11\xd4\x12\xa2\xa0\x3b"
        "\x40\x47\x49\x70\x22\xd9\xc3\x0e\x23\xef\x4d\xf5\xc8\x96\x44\xf4\x8b"
        "\xb5\x36\xf7\x94\x5b\x59\xd7\xbc\xdd\xff\x75\x44\x13\xd1\x35\x27\x3e"
        "\xa8\xe7\x5f\x22\xf2\x16\xc6\xb9\x99\x0a\xe7\x18\x06\xf2\xc0\x0b\x40"
        "\x25\xc4\x8b\x75\xc0\xf7\x3c\x49\x75\x79\x77\x37\x67\x07\x54\x28\x06"
        "\x7e\x7f\x16\xf4\xdd\xe3\x74\xf8\x21\x1f\xef\x42\xcb\x46\x8e\x62\x3d"
        "\xaf\x60\xb3\x56\x9d\x46\x2f\x4f\x19\xea\xcd\xb3\xed\x70\xee\xeb\xb4"
        "\x48\x3f\x8f\xd7\x77\xd4\x43\xe8\xb4\x04\x26\xdb\x6f\xe2\x90\x68\xc0"
        "\xca\x3d\x34\x14\x44\x2e\x86\x3a\x15\x47\x04\xb0\xe5\x1b\xc6\x64\xa1"
        "\x37\xb2\x6b\xe7\x19\xf4\xf7\xc9\xa5\x67\x8a\x67\x4d\xfc\x95\xdf\x80"
        "\xb9\xce\x37\x5d\xd6\x49\xc8\xc7\x04\xe5\x09\xbd\x88\xc8\xe6\x3d\x8c"
        "\x7d\xd6\x70\x71\x11\x5c\x89\x82\xba\x46\xaf\x4d\x6a\xdc\xc9\xf6\x8a"
        "\x75\xb9\x39\x7b\x03\x51\x53\xfa\xf4\x63\x66\xe7\x20\x5d\xd8\xd6\xf3"
        "\x75\x25\xc1\xa0\xe9\x46\x10\xdd\x94\x32\x3f\x6c\x15\xd0\x85\x19\x71"
        "\x49\xbf\xd6\x65\x55\x48\xcf\xd9\xc5\x2c\x97\x11\x93\x7f\x79\xab\xb1"
        "\xa1\x24\xf1\x21\x04\x65\x48\x3c\xd3\xb2\xd7\x83\x78\xcf\xb8\x5e\xd8"
        "\x2e\x7d\xa0\xf6\xeb\x6d\x27\x9f\x2a\xe4\x43\x69\xdd\xb4\x58\x1c\x55"
        "\x92\x5d\x0f\x6f\x1b\xa4\x71\xeb\xa2\x81\xf2\x59\x15\x2f\x85\xa6\x54"
        "\xfb\x39\xdd\xff\x3b\x48\x44\x39\xff\x15\x8e\x7c\x54\x19\xe0\x37\xf3"
        "\xe3\xad\x03\x8f\x22\x11\xf1\x03\x31\x95\x56\x3c\x7f\x93\xcd\x54\xb9"
        "\x09\x4f\x22\x6e\x78\x32\x71\xe1\xe5\xa2\xa2\xc1\x07\x12\xea\xb6\x25"
        "\xd6\x49\x31\xcd\x4f\xfe\x67\x38\xd9\x7b\x9b\x5e\xf8\x28\xee\x9f\xb0"
        "\x59\xfc\x01\xaf\x0e\x79\xc1\xe1\x4b\x1d\x25\x98\x8c\x69\xa3\x99\x73"
        "\x13\x2f\x02\x76\x8f\x79\x71\xd3\x14\x88\xb8\x65\x8a\x20\x87\x8b\x7c"
        "\x1d\xd7\xba\x02\xfc\x42\x93\x9d\xde\x3d\x4a\x33\x39\xa6\x5d\x50\x7d"
        "\xc5\x9c\x51\x09\x7b\x40\x51\x77\x05\xda\x56\xe9\xeb\xf0\xaf\xa5\x32"
        "\x82\xbf\x86\xdb\xb5\x8c\x54\x80\x69\xff\x6e\xb9\x5a\xad\xe7\xcc\x66"
        "\xd7\xbb\xef\x72\x47\x79\xca\x1f\x73\x1b\x33\x46\xff\x17\x70\x50\x37"
        "\x3d\x79\xff\x7b\x3e\x7f\x9b\xc0\xc1\xb4\xb2\x66\xa8\x87\x8b\x90\xba"
        "\xaa\x03\x9d\x3e\x3b\x63\x97\x9a\xc3\xdf\x6e\x6f\x48\x59\xaf\xd5\x02"
        "\x38\xc7\x54\x7a\x39\xb6\x08\x10\x93\x80\x44\xae\x18\x5d\x2b\xa3\xe0"
        "\x0a\x4e\x73\x67\x68\x64\xae\x09\x0d\x81\xea\xee\x5e\xe6\xcf\x1d\x0a"
        "\xb3\x78\xdd\x4d\xd8\x91\xe9\x37\xc2\xea\x54\x10\xe0\x51\x30\x93\x5e"
        "\x00\x78\x5e\xc2\x7e\x92\x39\x11\xfa\xb9\x64\xc2\x71\x55\x65\x27\x69"
        "\x7b\x52\x16\x06\x87\x46\x16\x02\xf8\x8d\xf1\x65\xd8\x84\xb3\x6e\xc2"
        "\xb6\xc2\x5a\x2f\x33\xc7\x15\x68\x7e\x9d\xdb\xfb\x96\xd6\x86\x1a\xca"
        "\x47\xda\x73\xd6\xf3\x14\x43\x45\xf4\x88\x43\xdd\x01\x4e\x5c\x5a\xd8"
        "\xfe\x99\x57\x54\xbd\x9c\xf3\x2f\xce\x1e\x70\x27\x13\x2f\x20\x82\xfb"
        "\x0a\x30\xb9\xde\xae\x84\xbe\xd4\xb2\x80\x45\x63\x40\x73\xc9\xc5\x8c"
        "\x89\xd9\xe9\x9c\x81\x76\x91\x77\xc6\xd5\x94\xf8\x8a\x4f\xac\xfd\x4c"
        "\x73\x5a\x20\x30\x7c\x73\x7a\xfa\xe5\x33\x66\x51\xb1\xb9\xbd\x52\x2d"
        "\x60\x39\x94\x73\x29\x6b\x83\x1d\xbd\x93\x3d\x93\x99\x4b\xa3\x06\x42"
        "\x79\xb1\x0e\xa0\xc5\x83\x3f\x41\xf1\x57\xea\x23\x02\x99\x3d\xbe\x43"
        "\x3b\x1a\xa3\xa3\x76\x6d\x54\x39\x02\x04\x84\xf4\x11\x3c\x4c\x85\x94"
        "\x65\xc3\xb4\x15\xc3\x43\x2f\x81\xdb\x87\x19\x53\x9d\x5b\xf3\x72\xaa"
        "\xae\xa1\xcc\x43\xa6\xc5\xcb\xe5\x97\x58\xbf\xee\x29\x16\x58\x95\xac"
        "\x4b\x00\x8e\x59\x5f\x43\x74\x91\xd8\x7a\xbe\xd0\x2c\xef\xcd\x9d\xb5"
        "\x3d\x94\xd0\x2d\xae\x17\xb1\x18\xe5\xd6\x78\x74\x63\x18\x1f\x4b\x87"
        "\xc1\x07\x72\xd2\xb1\x3f\x78\x09\x95\x9b\xc0\x48\x85\x06\x13\xd1\x7c"
        "\xa5\x10\x55\xf2\xf4\x16\xa4\x4f\xe1\x80\xd2\xd5\x0c\x31\x2c\xca\x7c"
        "\xb1\x4a\x2b\xdc\x33\x1f\x57\xa9\x81\x71\x39\xa2\x06\xfc\x76\xd5\x72"
        "\x27\xff\xff\x2d\xe2\x0a\x4b\x8e\x37\x37\xfb\xb4\x29\x13\x77\x7c\x06"
        "\x37\x6f\x79\x9e\xba\x36\x7e\x21\xf9\x4c\xa5\x98\x70\x5f\x5d\xcb\x76"
        "\x7d\x6f\x84\xfa\xd6\xb0\xf6\x09\x5e\x53\xc4\xc4\x23\x4d\x0c\x1f\xbe"
        "\x43\x4f\x6a\xb8\xf4\x3c\x00\x13\xee\x93\xb8\x39\x46\xee\x77\x59\xe8"
        "\x9d\x7b\xdd\x1a\x32\xd7\xb3\x11\x0b\x93\x2a\x4d\x02\xda\x71\x1b\x75"
        "\x7f\xe4\x3c\x06\xd2\x1e\x35\x81\x0d\x8f\xe9\x8b\x27\xfa\xea\x8a\xa1"
        "\x2b\xc8\x71\x6e\xef\xc5\xc9\x7c\x45\xac\x33\xee\xec\x96\x4c\x52\x14"
        "\xbc\x3a\x93\x59\xbd\xea\x1c\xcc\xab\x94\xf1\x5e\x36\x31\x9c\xb3\x4e"
        "\xbc\xac\xed\xb8\x2c\x2e\xd3\xde\x5a\x8a\x8f\x00\x11\xe8\xf7\x4e\x82"
        "\xd7\xf9\x60\x93\x53\x0e\x76\x69\x28\x39\xd7\x96\x19\x39\xad\xfd\xee"
        "\xea\xff\x19\xd1\x1e\xfc\xaf\xb6\xd5\x46\xfe\xf2\x71\xe8\x9d\x6c\xc2"
        "\x38\xa0\x81\xff\x58\xce\xfc\xce\x3f\xbf\x46\x25\xa7\xe7\xde\x40\xe4"
        "\x2e\x07\xb3\x44\x49\xe1\x5e\x06\x5c\xc7\x34\x86\x63\xa5\x21\x90\x20"
        "\x2c\x7a\xf2\x88\xa4\x51\x0d\xe0\x3d\xab\x19\xd2\x62\x85\xed\xa8\x91"
        "\x56\xd5\x0d\xd3\x85\xa6\x03\x33\xba\x5b\xbf\x5d\x77\xcd\x70\x07\xad"
        "\x15\x19\xad\x54\x70\xde\x3d\xd6\xd6\x08\x0c\xaf\xcc\xf8\xa9\x74\x06"
        "\xbb\x6b\x68\xa1\xf0\xc4\x54\x98\x20\xa7\x3c\x88\x0f\x47\x5f\x73\x2a"
        "\xe0\x03\x98\xe8\xbd\x1f\x49\x08\xb7\x80\x7f\xb3\x3b\x72\x68\x5e\xc3"
        "\x7a\x2d\x3f\x76\x64\x13\xa6\x04\x59\x51\x62\x46\xe5\xa1\xd9\x98\xa2"
        "\x01\x7a\xef\x09\x48\xa6\x8c\xb0\xb3\xe3\x5c\xb8\x0d\xd3\x49\xe8\x91"
        "\xae\xf5\x95\xdc\x4d\x47\x0e\x8a\xc3\x2a\x30\x8e\x15\xfc\x37\xd0\x6a"
        "\xea\xc2\x89\xc0\x52\x3f\x48\x3e\x1f\xf7\x40\x8c\x60\xed\xdd\xab\x65"
        "\x2f\x2e\xf9\x1d\x4f\x2b\x01\x98\x7b\x0f\x46\xda\x03\x4e\x5c\x3f\x74"
        "\x5a\x7e\xe8\x10\x1a\x39\x34\xc5\x4e\x24\xb4\x8e\xc0\x27\x5e\x2d\x06"
        "\x87\xdc\x74\x6b\x08\x27\xcb\xf6\x52\xf4\x06\xc6\xb9\x5f\x27\x22\xe5"
        "\x8c\x05\xf7\x52\xce\x21\x26\x59\x6e\x1c\xd7\x65\x5b\x90\x48\x01\x78"
        "\x4c\x41\x6b\x22\xf7\x3d\x32\x46\x78\xe2\x72\x4f\x43\xf1\xfe\x68\x7c"
        "\x7e\x8a\x60\xc2\x8b\x82\xb6\x52\x83\x41\xb6\x48\xcd\xd5\x6f\xed\x7c"
        "\xdc\xbb\x15\x75\x91\x2d\x5e\xcd\x36\xde\xa3\xbc\xa0\xb7\x42\x7d\x83"
        "\x92\xc6\x28\x94\x55\xe8\xf8\xd2\xab\x22\x42\x72\x92\x51\xae\x03\x3a"
        "\x9e\x02\x21\x0e\x62\xdf\x05\x46\xa7\x4b\x33\x3a\x1c\x48\xf9\x5f\xd5"
        "\x4a\xcb\x57\x41\x25\x9e\x8c\x54\x88\xef\xee\xe3\x27\x41\x5c\xc1\x94"
        "\x51\x43\x2c\x6f\x14\xc2\x76\x93\x10\x2a\x3c\xd8\x48\x57\xcd\x65\x86"
        "\xfc\x5c\xa9\xa9\x3e\xb0\x14\x5f\xac\x06\x62\xff\x86\x10\x7f\x99\x8a"
        "\x8e\xf7\xdf\x8a\xa1\x40\x46\xc5\x5b\x03\xd3\xd4\x7f\x88\xa8\xd6\x0f"
        "\x77\x74\xa2\xee\x08\x75\x88\x97\xfb\x41\x1a\x94\xb3\xc2\xfc\x5d\x5f"
        "\x0d\xb4\x2c\x04\x56\xec\x01\x45\x08\xe5\x24\x7d\x33\xae\x6c\x96\x2d"
        "\x35\x60\x3f\xf8\x45\x4c\x16\xf8\x34\x28\x56\x93\x51\x25\x10\x2b\xb7"
        "\x84\xed\x71\x48\x87\x07\x1f\x3d\x99\x8e\xfd\xd9\x92\x3c\x95\x4a\xb6"
        "\xce\x43\x1b\x63\xee\x35\x6b\x0c\x78\x5f\x2f\x47\xb9\x0e\x29\x38\x9f"
        "\x22\xfc\x5b\x59\xa7\x0e\xfa\xea\x2b\xd4\x01\x95\xaf\x44\x86\x22\x0d"
        "\x70\x2e\x30\xbf\xc4\x3c\x10\xec\x23\xea\x62\x83\x99\x4a\x7d\xde\x4d"
        "\xcb\x61\xfe\xa6\xb6\x51\xfb\x1d\x62\x45\x8d\x07\x41\xa1\x28\x30\x05"
        "\x2f\xcc\x46\x0d\xb0\x43\xaf\xe5\x25\x62\x9b\x40\xd7\xce\xe6\x58\xe4"
        "\xcb\x5e\x93\x0e\xd6\x24\x80\x6c\x43\xa0\x06\xdc\x93\x36\xd0\x7c\x2b"
        "\x80\x81\xc1\x28\xad\x27\x06\xf4\x82\x61\xf7\x89\x70\x84\xc2\x97\xa1"
        "\xa6\x61\x3b\xc1\x8f\x5a\x38\xd4\x42\x76\x8a\xf3\x80\x41\xef\xe0\x3d"
        "\x15\x2e\xf9\x5f\xf5\x69\xe7\x6d\xb2\x39\x1f\x45\x09\xd7\xf3\x39\xd9"
        "\x2f\xdb\x4a\x89\x36\x49\x49\xda\x39\x32\xba\x5c\x04\xc2\x4a\x56\x0a"
        "\xd8\x0a\x3c\xe6\x54\x57\x83\x76\xe5\x99\xaf\xf3\x56\x5b\x1d\x53\x1f"
        "\x30\x91\x2b\x99\xe6\x61\x9e\xbe\x93\xcc\x0b\x81\xea\x99\x35\xfd\x46"
        "\xed\xb4\x4a\x78\xf6\x15\x25\x54\x90\xa4\xb6\x21\x50\x1f\x2a\x9e\x4d"
        "\x24\x62\x4c\x4d\xac\x92\x74\x11\x8c\x67\x58\x4f\x5d\x37\x47\x55\x53"
        "\x4d\x7f\x68\xf6\x79\xc4\xff\x51\x6a\x9c\x86\x1a\x0e\x7e\x65\x86\x8f"
        "\xcb\x2b\xf1\xcb\x9a\xea\x4e\x05\xdf\x72\x27\x9f\xdb\x0d\x2b\x9e\x93"
        "\x5c\x5a\xf3\xcf\x47\x4b\xed\x79\xdf\xc2\x48\xc1\xf5\xae\xa4\xb8\xb3"
        "\x2c\x5d\x29\x5e\x57\x07\x9d\x0f\xe6\x62\xa4\x6b\x7f\x71\xcd\x47\x74"
        "\x4d\xb8\x6c\x50\xb7\x04\xc9\x71\xd9\x01\x95\xc7\xb2\xc7\x43\x9a\x2d"
        "\x78\xcc\xfa\x79\xb5\xfc\x2b\xff\x6b\xbf\x84\x02\x62\xbf\x89\x39\x4b"
        "\x3e\x64\x91\x95\x32\x64\xd2\x70\x0c\x83\x8f\xa2\xc7\xb3\x42\x52\x60"
        "\x0c\x96\x54\xe5\x02\xdc\xea\x39\xcb\x6b\xc3\xeb\x69\x99\x2e\x23\x4b"
        "\x4c\xa7\xdb\x2f\x45\x85\x8d\x62\x84\xca\x62\x70\xd6\xb2\xf0\xe5\x8f"
        "\xde\xd8\xa7\xb4\xa3\x02\xa9\x7b\xc6\x41\xdf\x07\x72\x0b\xa2\xb2\x6b"
        "\xbf\xcc\x80\x7c\xa0\xab\xb1\xb4\x43\x22\x26\x9c\x21\xc5\xec\x68\xcb"
        "\x06\x8e\xa8\x80\x67\xd9\x05\xea\x91\x7b\xb0\x3e\xef\xda\xeb\xde\xab"
        "\xf2\xd0\xdc\xe8\x09\x97\xc9\x15\xc8\x94\x9d\xe9\x92\x58\x7c\x2c\xb5"
        "\xfe\x36\xd7\xd3\xe5\xdb\x21\xb0\x94\xb8\xb7\x79\x40\xb5\xf0\x77\x22"
        "\xe4\x7a\x08\xd3\x67\xe5\xf8\x4c\x96\xec\x66\x4b\x72\x93\x4b\x99\xb3"
        "\x10\x9a\xf6\x5d\x77\xe8\x6a\xbd\x68\x59\xcd\xdf\x4b\xba\xe1\xf0\x93"
        "\x04\x62\xdf\x15\xfd\xdb\xc4\x85\x62\xea\x35\x11\xa8\x06\x5e\xf0\x28"
        "\xcf\x12\xf1\x4d\xcf\x6e\xbe\xcd\x8d\x88\x48\x36\x17\x4f\xaf\x1a\xa6"
        "\x09\xe5\xf1\xee\x11\x62\xdf\xa1\x3b\xdc\x1f\xa7\xcf\xaa\xdb\xa8\x5c"
        "\x72\xe9\x75\x8f\x03\xa7\x55\xd0\xbe\x53\xf8\xd2\xa1\xdf\xb1\xc6\x8c"
        "\xc1\x64\xb0\xa0\x78\x0d\x97\x1a\x96\xea\x2c\x4d\x4c\xa0\x39\x8c\x22"
        "\x35\x98\x0a\x93\x07\xb3\xd5\xbd\x3b\x01\x0a\x3a\xd0\xa5\xdb\xed\x28"
        "\x81\xa9\x70\x0a\xf5\x61\xac\x8c\x7e\x36\xbb\x2f\xc4\xc4\x0e\x9c\xf9"
        "\x6f\x06\x81\x7f\xb9\x03\x72\x9a\x7d\xb6\xff\x95\x76\x97\xc9\xed\xe7"
        "\x88\x5d\x94\xff\x1a\xa7\x08\x26\xad\x01\xa9\xb0\x3c\x37\xb0\x96\x9b"
        "\xe0\xda\xf6\x0a\xf9\x31\x09\xeb\x1d\xee\x72\xe4\x36\x3f\x51\xaf\x62"
        "\xaf\x6f\xb2\xa6\xdf\x3b\xec\x89\x82\x2a\x7a\x0b\x67\x80\x58\xfa\x3f"
        "\xef\x86\xfa\xec\x21\x6e\xb6\x99\x21\x62\xf8\xdc\xbf\x71\x9c\x14\x8c"
        "\xd2\xf9\xc5\x5f\x49\x01\x20\x3a\x9a\x8a\x2c\x3e\x90\xf3\x94\x3d\xbc"
        "\x10\x36\x0a\x1a\x49\x70\x0d\x1d\xfb\xf6\x6d\x69\xf6\xfb\xaf\x50\x6c"
        "\x8b\xcc\xe8\xbb\x0d\x87\x2a\x02\x23\x89\x26\x40\x7a\x4e\xdd\xd5\xd0"
        "\xfc\x5a\x75\x2f\x90\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00",
        4096));
    NONFAILING(*(uint16_t*)0x20002444 = 0x1000);
    syscall(__NR_write, r[2], 0x20001440ul, 0x1006ul);
    break;
  }
}
int main(void)
{
  syscall(__NR_mmap, 0x1ffff000ul, 0x1000ul, 0ul, 0x32ul, -1, 0ul);
  syscall(__NR_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x32ul, -1, 0ul);
  syscall(__NR_mmap, 0x21000000ul, 0x1000ul, 0ul, 0x32ul, -1, 0ul);
  setup_binfmt_misc();
  install_segv_handler();
  for (procid = 0; procid < 6; procid++) {
    if (fork() == 0) {
      use_temporary_dir();
      do_sandbox_none();
    }
  }
  sleep(1000000);
  return 0;
}