// https://syzkaller.appspot.com/bug?id=603580af4ac98fe928c40be08348ad644a613267
// 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/nl80211.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 clone_ongoing;
static __thread int skip_segv;
static __thread jmp_buf segv_env;

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

static void install_segv_handler(void)
{
  struct sigaction sa;
  memset(&sa, 0, sizeof(sa));
  sa.sa_handler = SIG_IGN;
  syscall(SYS_rt_sigaction, 0x20, &sa, NULL, 8);
  syscall(SYS_rt_sigaction, 0x21, &sa, NULL, 8);
  memset(&sa, 0, sizeof(sa));
  sa.sa_sigaction = segv_handler;
  sa.sa_flags = SA_NODEFER | SA_SIGINFO;
  sigaction(SIGSEGV, &sa, NULL);
  sigaction(SIGBUS, &sa, NULL);
}

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

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

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

static 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);
}

#define BITMASK(bf_off, bf_len) (((1ull << (bf_len)) - 1) << (bf_off))
#define STORE_BY_BITMASK(type, htobe, addr, val, bf_off, bf_len)               \
  *(type*)(addr) =                                                             \
      htobe((htobe(*(type*)(addr)) & ~BITMASK((bf_off), (bf_len))) |           \
            (((type)(val) << (bf_off)) & BITMASK((bf_off), (bf_len))))

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[4096];
};

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;
  if (size > 0)
    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, bool dofail)
{
  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;
  ssize_t n = sendto(sock, nlmsg->buf, hdr->nlmsg_len, 0,
                     (struct sockaddr*)&addr, sizeof(addr));
  if (n != (ssize_t)hdr->nlmsg_len) {
    if (dofail)
      exit(1);
    return -1;
  }
  n = recv(sock, nlmsg->buf, sizeof(nlmsg->buf), 0);
  if (reply_len)
    *reply_len = 0;
  if (n < 0) {
    if (dofail)
      exit(1);
    return -1;
  }
  if (n < (ssize_t)sizeof(struct nlmsghdr)) {
    errno = EINVAL;
    if (dofail)
      exit(1);
    return -1;
  }
  if (hdr->nlmsg_type == NLMSG_DONE)
    return 0;
  if (reply_len && hdr->nlmsg_type == reply_type) {
    *reply_len = n;
    return 0;
  }
  if (n < (ssize_t)(sizeof(struct nlmsghdr) + sizeof(struct nlmsgerr))) {
    errno = EINVAL;
    if (dofail)
      exit(1);
    return -1;
  }
  if (hdr->nlmsg_type != NLMSG_ERROR) {
    errno = EINVAL;
    if (dofail)
      exit(1);
    return -1;
  }
  errno = -((struct nlmsgerr*)(hdr + 1))->error;
  return -errno;
}

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

static int netlink_query_family_id(struct nlmsg* nlmsg, int sock,
                                   const char* family_name, bool dofail)
{
  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, family_name,
               strnlen(family_name, GENL_NAMSIZ - 1) + 1);
  int n = 0;
  int err = netlink_send_ext(nlmsg, sock, GENL_ID_CTRL, &n, dofail);
  if (err < 0) {
    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) {
    errno = EINVAL;
    return -1;
  }
  recv(sock, nlmsg->buf, sizeof(nlmsg->buf), 0);
  return id;
}

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);
  if (err < 0) {
  }
}

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);
  if (err < 0) {
  }
}

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);
  if (err < 0) {
  }
}

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);
  if (err < 0) {
  }
}

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);
  if (err < 0) {
  }
}

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);
  if (err < 0) {
  }
}

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);
  if (err < 0) {
  }
}

#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);
  if (err < 0) {
  }
}

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);
  if (err < 0) {
  }
}

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));
  if (err < 0) {
  }
}

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));
  if (err < 0) {
  }
}

static void netlink_add_neigh(struct nlmsg* nlmsg, int sock, const char* name,
                              const void* addr, int addrsize, const void* mac,
                              int macsize)
{
  struct ndmsg hdr;
  memset(&hdr, 0, sizeof(hdr));
  hdr.ndm_family = addrsize == 4 ? AF_INET : AF_INET6;
  hdr.ndm_ifindex = if_nametoindex(name);
  hdr.ndm_state = NUD_PERMANENT;
  netlink_init(nlmsg, RTM_NEWNEIGH, NLM_F_EXCL | NLM_F_CREATE, &hdr,
               sizeof(hdr));
  netlink_attr(nlmsg, NDA_DST, addr, addrsize);
  netlink_attr(nlmsg, NDA_LLADDR, mac, macsize);
  int err = netlink_send(nlmsg, sock);
  if (err < 0) {
  }
}

static struct nlmsg nlmsg;

static int tunfd = -1;

#define TUN_IFACE "syz_tun"
#define LOCAL_MAC 0xaaaaaaaaaaaa
#define REMOTE_MAC 0xaaaaaaaaaabb
#define LOCAL_IPV4 "172.20.20.170"
#define REMOTE_IPV4 "172.20.20.187"
#define LOCAL_IPV6 "fe80::aa"
#define REMOTE_IPV6 "fe80::bb"

#define IFF_NAPI 0x0010

static void initialize_tun(void)
{
  tunfd = open("/dev/net/tun", O_RDWR | O_NONBLOCK);
  if (tunfd == -1) {
    printf("tun: can't open /dev/net/tun: please enable CONFIG_TUN=y\n");
    printf("otherwise fuzzing or reproducing might not work as intended\n");
    return;
  }
  const int kTunFd = 200;
  if (dup2(tunfd, kTunFd) < 0)
    exit(1);
  close(tunfd);
  tunfd = kTunFd;
  struct ifreq ifr;
  memset(&ifr, 0, sizeof(ifr));
  strncpy(ifr.ifr_name, TUN_IFACE, IFNAMSIZ);
  ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
  if (ioctl(tunfd, TUNSETIFF, (void*)&ifr) < 0) {
    exit(1);
  }
  char sysctl[64];
  sprintf(sysctl, "/proc/sys/net/ipv6/conf/%s/accept_dad", TUN_IFACE);
  write_file(sysctl, "0");
  sprintf(sysctl, "/proc/sys/net/ipv6/conf/%s/router_solicitations", TUN_IFACE);
  write_file(sysctl, "0");
  int sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
  if (sock == -1)
    exit(1);
  netlink_add_addr4(&nlmsg, sock, TUN_IFACE, LOCAL_IPV4);
  netlink_add_addr6(&nlmsg, sock, TUN_IFACE, LOCAL_IPV6);
  uint64_t macaddr = REMOTE_MAC;
  struct in_addr in_addr;
  inet_pton(AF_INET, REMOTE_IPV4, &in_addr);
  netlink_add_neigh(&nlmsg, sock, TUN_IFACE, &in_addr, sizeof(in_addr),
                    &macaddr, ETH_ALEN);
  struct in6_addr in6_addr;
  inet_pton(AF_INET6, REMOTE_IPV6, &in6_addr);
  netlink_add_neigh(&nlmsg, sock, TUN_IFACE, &in6_addr, sizeof(in6_addr),
                    &macaddr, ETH_ALEN);
  macaddr = LOCAL_MAC;
  netlink_device_change(&nlmsg, sock, TUN_IFACE, true, 0, &macaddr, ETH_ALEN,
                        NULL);
  close(sock);
}

#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 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_query_family_id(&nlmsg, sock, DEVLINK_FAMILY_NAME, true);
  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, true);
  if (err < 0) {
    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 WIFI_INITIAL_DEVICE_COUNT 2
#define WIFI_MAC_BASE                                                          \
  {                                                                            \
    0x08, 0x02, 0x11, 0x00, 0x00, 0x00                                         \
  }
#define WIFI_IBSS_BSSID                                                        \
  {                                                                            \
    0x50, 0x50, 0x50, 0x50, 0x50, 0x50                                         \
  }
#define WIFI_IBSS_SSID                                                         \
  {                                                                            \
    0x10, 0x10, 0x10, 0x10, 0x10, 0x10                                         \
  }
#define WIFI_DEFAULT_FREQUENCY 2412
#define WIFI_DEFAULT_SIGNAL 0
#define WIFI_DEFAULT_RX_RATE 1
#define HWSIM_CMD_REGISTER 1
#define HWSIM_CMD_FRAME 2
#define HWSIM_CMD_NEW_RADIO 4
#define HWSIM_ATTR_SUPPORT_P2P_DEVICE 14
#define HWSIM_ATTR_PERM_ADDR 22

#define IF_OPER_UP 6
struct join_ibss_props {
  int wiphy_freq;
  bool wiphy_freq_fixed;
  uint8_t* mac;
  uint8_t* ssid;
  int ssid_len;
};

static int set_interface_state(const char* interface_name, int on)
{
  struct ifreq ifr;
  int sock = socket(AF_INET, SOCK_DGRAM, 0);
  if (sock < 0) {
    return -1;
  }
  memset(&ifr, 0, sizeof(ifr));
  strcpy(ifr.ifr_name, interface_name);
  int ret = ioctl(sock, SIOCGIFFLAGS, &ifr);
  if (ret < 0) {
    close(sock);
    return -1;
  }
  if (on)
    ifr.ifr_flags |= IFF_UP;
  else
    ifr.ifr_flags &= ~IFF_UP;
  ret = ioctl(sock, SIOCSIFFLAGS, &ifr);
  close(sock);
  if (ret < 0) {
    return -1;
  }
  return 0;
}

static int nl80211_set_interface(struct nlmsg* nlmsg, int sock,
                                 int nl80211_family, uint32_t ifindex,
                                 uint32_t iftype)
{
  struct genlmsghdr genlhdr;
  memset(&genlhdr, 0, sizeof(genlhdr));
  genlhdr.cmd = NL80211_CMD_SET_INTERFACE;
  netlink_init(nlmsg, nl80211_family, 0, &genlhdr, sizeof(genlhdr));
  netlink_attr(nlmsg, NL80211_ATTR_IFINDEX, &ifindex, sizeof(ifindex));
  netlink_attr(nlmsg, NL80211_ATTR_IFTYPE, &iftype, sizeof(iftype));
  int err = netlink_send(nlmsg, sock);
  if (err < 0) {
  }
  return err;
}

static int nl80211_join_ibss(struct nlmsg* nlmsg, int sock, int nl80211_family,
                             uint32_t ifindex, struct join_ibss_props* props)
{
  struct genlmsghdr genlhdr;
  memset(&genlhdr, 0, sizeof(genlhdr));
  genlhdr.cmd = NL80211_CMD_JOIN_IBSS;
  netlink_init(nlmsg, nl80211_family, 0, &genlhdr, sizeof(genlhdr));
  netlink_attr(nlmsg, NL80211_ATTR_IFINDEX, &ifindex, sizeof(ifindex));
  netlink_attr(nlmsg, NL80211_ATTR_SSID, props->ssid, props->ssid_len);
  netlink_attr(nlmsg, NL80211_ATTR_WIPHY_FREQ, &(props->wiphy_freq),
               sizeof(props->wiphy_freq));
  if (props->mac)
    netlink_attr(nlmsg, NL80211_ATTR_MAC, props->mac, ETH_ALEN);
  if (props->wiphy_freq_fixed)
    netlink_attr(nlmsg, NL80211_ATTR_FREQ_FIXED, NULL, 0);
  int err = netlink_send(nlmsg, sock);
  if (err < 0) {
  }
  return err;
}

static int get_ifla_operstate(struct nlmsg* nlmsg, int ifindex)
{
  struct ifinfomsg info;
  memset(&info, 0, sizeof(info));
  info.ifi_family = AF_UNSPEC;
  info.ifi_index = ifindex;
  int sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
  if (sock == -1) {
    return -1;
  }
  netlink_init(nlmsg, RTM_GETLINK, 0, &info, sizeof(info));
  int n;
  int err = netlink_send_ext(nlmsg, sock, RTM_NEWLINK, &n, true);
  close(sock);
  if (err) {
    return -1;
  }
  struct rtattr* attr = IFLA_RTA(NLMSG_DATA(nlmsg->buf));
  for (; RTA_OK(attr, n); attr = RTA_NEXT(attr, n)) {
    if (attr->rta_type == IFLA_OPERSTATE)
      return *((int32_t*)RTA_DATA(attr));
  }
  return -1;
}

static int await_ifla_operstate(struct nlmsg* nlmsg, char* interface,
                                int operstate)
{
  int ifindex = if_nametoindex(interface);
  while (true) {
    usleep(1000);
    int ret = get_ifla_operstate(nlmsg, ifindex);
    if (ret < 0)
      return ret;
    if (ret == operstate)
      return 0;
  }
  return 0;
}

static int nl80211_setup_ibss_interface(struct nlmsg* nlmsg, int sock,
                                        int nl80211_family_id, char* interface,
                                        struct join_ibss_props* ibss_props)
{
  int ifindex = if_nametoindex(interface);
  if (ifindex == 0) {
    return -1;
  }
  int ret = nl80211_set_interface(nlmsg, sock, nl80211_family_id, ifindex,
                                  NL80211_IFTYPE_ADHOC);
  if (ret < 0) {
    return -1;
  }
  ret = set_interface_state(interface, 1);
  if (ret < 0) {
    return -1;
  }
  ret = nl80211_join_ibss(nlmsg, sock, nl80211_family_id, ifindex, ibss_props);
  if (ret < 0) {
    return -1;
  }
  return 0;
}

static int hwsim80211_create_device(struct nlmsg* nlmsg, int sock,
                                    int hwsim_family,
                                    uint8_t mac_addr[ETH_ALEN])
{
  struct genlmsghdr genlhdr;
  memset(&genlhdr, 0, sizeof(genlhdr));
  genlhdr.cmd = HWSIM_CMD_NEW_RADIO;
  netlink_init(nlmsg, hwsim_family, 0, &genlhdr, sizeof(genlhdr));
  netlink_attr(nlmsg, HWSIM_ATTR_SUPPORT_P2P_DEVICE, NULL, 0);
  netlink_attr(nlmsg, HWSIM_ATTR_PERM_ADDR, mac_addr, ETH_ALEN);
  int err = netlink_send(nlmsg, sock);
  if (err < 0) {
  }
  return err;
}

static void initialize_wifi_devices(void)
{
  int rfkill = open("/dev/rfkill", O_RDWR);
  if (rfkill == -1) {
    if (errno != ENOENT && errno != EACCES)
      exit(1);
  } else {
    struct rfkill_event event = {0};
    event.type = RFKILL_TYPE_ALL;
    event.op = RFKILL_OP_CHANGE_ALL;
    if (write(rfkill, &event, sizeof(event)) != (ssize_t)(sizeof(event)))
      exit(1);
    close(rfkill);
  }
  uint8_t mac_addr[6] = WIFI_MAC_BASE;
  int sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC);
  if (sock < 0) {
    return;
  }
  int hwsim_family_id =
      netlink_query_family_id(&nlmsg, sock, "MAC80211_HWSIM", true);
  int nl80211_family_id =
      netlink_query_family_id(&nlmsg, sock, "nl80211", true);
  uint8_t ssid[] = WIFI_IBSS_SSID;
  uint8_t bssid[] = WIFI_IBSS_BSSID;
  struct join_ibss_props ibss_props = {.wiphy_freq = WIFI_DEFAULT_FREQUENCY,
                                       .wiphy_freq_fixed = true,
                                       .mac = bssid,
                                       .ssid = ssid,
                                       .ssid_len = sizeof(ssid)};
  for (int device_id = 0; device_id < WIFI_INITIAL_DEVICE_COUNT; device_id++) {
    mac_addr[5] = device_id;
    int ret = hwsim80211_create_device(&nlmsg, sock, hwsim_family_id, mac_addr);
    if (ret < 0)
      exit(1);
    char interface[6] = "wlan0";
    interface[4] += device_id;
    if (nl80211_setup_ibss_interface(&nlmsg, sock, nl80211_family_id, interface,
                                     &ibss_props) < 0)
      exit(1);
  }
  for (int device_id = 0; device_id < WIFI_INITIAL_DEVICE_COUNT; device_id++) {
    char interface[6] = "wlan0";
    interface[4] += device_id;
    int ret = await_ifla_operstate(&nlmsg, interface, IF_OPER_UP);
    if (ret < 0)
      exit(1);
  }
  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 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_query_family_id(&nlmsg, sock, WG_GENL_NAME, true);
  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 < 0) {
  }
  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 < 0) {
  }
  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 < 0) {
  }

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);
}

static int read_tun(char* data, int size)
{
  if (tunfd < 0)
    return -1;
  int rv = read(tunfd, data, size);
  if (rv < 0) {
    if (errno == EAGAIN || errno == EBADFD)
      return -1;
    exit(1);
  }
  return rv;
}

static void flush_tun()
{
  char data[1000];
  while (read_tun(&data[0], sizeof(data)) != -1) {
  }
}

#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 {
  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 = 202;
  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);
}

#define XT_TABLE_SIZE 1536
#define XT_MAX_ENTRIES 10

struct xt_counters {
  uint64_t pcnt, bcnt;
};

struct ipt_getinfo {
  char name[32];
  unsigned int valid_hooks;
  unsigned int hook_entry[5];
  unsigned int underflow[5];
  unsigned int num_entries;
  unsigned int size;
};

struct ipt_get_entries {
  char name[32];
  unsigned int size;
  uint64_t entrytable[XT_TABLE_SIZE / sizeof(uint64_t)];
};

struct ipt_replace {
  char name[32];
  unsigned int valid_hooks;
  unsigned int num_entries;
  unsigned int size;
  unsigned int hook_entry[5];
  unsigned int underflow[5];
  unsigned int num_counters;
  struct xt_counters* counters;
  uint64_t entrytable[XT_TABLE_SIZE / sizeof(uint64_t)];
};

struct ipt_table_desc {
  const char* name;
  struct ipt_getinfo info;
  struct ipt_replace replace;
};

static struct ipt_table_desc ipv4_tables[] = {
    {.name = "filter"}, {.name = "nat"},      {.name = "mangle"},
    {.name = "raw"},    {.name = "security"},
};

static struct ipt_table_desc ipv6_tables[] = {
    {.name = "filter"}, {.name = "nat"},      {.name = "mangle"},
    {.name = "raw"},    {.name = "security"},
};

#define IPT_BASE_CTL 64
#define IPT_SO_SET_REPLACE (IPT_BASE_CTL)
#define IPT_SO_GET_INFO (IPT_BASE_CTL)
#define IPT_SO_GET_ENTRIES (IPT_BASE_CTL + 1)

struct arpt_getinfo {
  char name[32];
  unsigned int valid_hooks;
  unsigned int hook_entry[3];
  unsigned int underflow[3];
  unsigned int num_entries;
  unsigned int size;
};

struct arpt_get_entries {
  char name[32];
  unsigned int size;
  uint64_t entrytable[XT_TABLE_SIZE / sizeof(uint64_t)];
};

struct arpt_replace {
  char name[32];
  unsigned int valid_hooks;
  unsigned int num_entries;
  unsigned int size;
  unsigned int hook_entry[3];
  unsigned int underflow[3];
  unsigned int num_counters;
  struct xt_counters* counters;
  uint64_t entrytable[XT_TABLE_SIZE / sizeof(uint64_t)];
};

struct arpt_table_desc {
  const char* name;
  struct arpt_getinfo info;
  struct arpt_replace replace;
};

static struct arpt_table_desc arpt_tables[] = {
    {.name = "filter"},
};

#define ARPT_BASE_CTL 96
#define ARPT_SO_SET_REPLACE (ARPT_BASE_CTL)
#define ARPT_SO_GET_INFO (ARPT_BASE_CTL)
#define ARPT_SO_GET_ENTRIES (ARPT_BASE_CTL + 1)

static void checkpoint_iptables(struct ipt_table_desc* tables, int num_tables,
                                int family, int level)
{
  int fd = socket(family, SOCK_STREAM, IPPROTO_TCP);
  if (fd == -1) {
    switch (errno) {
    case EAFNOSUPPORT:
    case ENOPROTOOPT:
      return;
    }
    exit(1);
  }
  for (int i = 0; i < num_tables; i++) {
    struct ipt_table_desc* table = &tables[i];
    strcpy(table->info.name, table->name);
    strcpy(table->replace.name, table->name);
    socklen_t optlen = sizeof(table->info);
    if (getsockopt(fd, level, IPT_SO_GET_INFO, &table->info, &optlen)) {
      switch (errno) {
      case EPERM:
      case ENOENT:
      case ENOPROTOOPT:
        continue;
      }
      exit(1);
    }
    if (table->info.size > sizeof(table->replace.entrytable))
      exit(1);
    if (table->info.num_entries > XT_MAX_ENTRIES)
      exit(1);
    struct ipt_get_entries entries;
    memset(&entries, 0, sizeof(entries));
    strcpy(entries.name, table->name);
    entries.size = table->info.size;
    optlen = sizeof(entries) - sizeof(entries.entrytable) + table->info.size;
    if (getsockopt(fd, level, IPT_SO_GET_ENTRIES, &entries, &optlen))
      exit(1);
    table->replace.valid_hooks = table->info.valid_hooks;
    table->replace.num_entries = table->info.num_entries;
    table->replace.size = table->info.size;
    memcpy(table->replace.hook_entry, table->info.hook_entry,
           sizeof(table->replace.hook_entry));
    memcpy(table->replace.underflow, table->info.underflow,
           sizeof(table->replace.underflow));
    memcpy(table->replace.entrytable, entries.entrytable, table->info.size);
  }
  close(fd);
}

static void reset_iptables(struct ipt_table_desc* tables, int num_tables,
                           int family, int level)
{
  int fd = socket(family, SOCK_STREAM, IPPROTO_TCP);
  if (fd == -1) {
    switch (errno) {
    case EAFNOSUPPORT:
    case ENOPROTOOPT:
      return;
    }
    exit(1);
  }
  for (int i = 0; i < num_tables; i++) {
    struct ipt_table_desc* table = &tables[i];
    if (table->info.valid_hooks == 0)
      continue;
    struct ipt_getinfo info;
    memset(&info, 0, sizeof(info));
    strcpy(info.name, table->name);
    socklen_t optlen = sizeof(info);
    if (getsockopt(fd, level, IPT_SO_GET_INFO, &info, &optlen))
      exit(1);
    if (memcmp(&table->info, &info, sizeof(table->info)) == 0) {
      struct ipt_get_entries entries;
      memset(&entries, 0, sizeof(entries));
      strcpy(entries.name, table->name);
      entries.size = table->info.size;
      optlen = sizeof(entries) - sizeof(entries.entrytable) + entries.size;
      if (getsockopt(fd, level, IPT_SO_GET_ENTRIES, &entries, &optlen))
        exit(1);
      if (memcmp(table->replace.entrytable, entries.entrytable,
                 table->info.size) == 0)
        continue;
    }
    struct xt_counters counters[XT_MAX_ENTRIES];
    table->replace.num_counters = info.num_entries;
    table->replace.counters = counters;
    optlen = sizeof(table->replace) - sizeof(table->replace.entrytable) +
             table->replace.size;
    if (setsockopt(fd, level, IPT_SO_SET_REPLACE, &table->replace, optlen))
      exit(1);
  }
  close(fd);
}

static void checkpoint_arptables(void)
{
  int fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
  if (fd == -1) {
    switch (errno) {
    case EAFNOSUPPORT:
    case ENOPROTOOPT:
      return;
    }
    exit(1);
  }
  for (unsigned i = 0; i < sizeof(arpt_tables) / sizeof(arpt_tables[0]); i++) {
    struct arpt_table_desc* table = &arpt_tables[i];
    strcpy(table->info.name, table->name);
    strcpy(table->replace.name, table->name);
    socklen_t optlen = sizeof(table->info);
    if (getsockopt(fd, SOL_IP, ARPT_SO_GET_INFO, &table->info, &optlen)) {
      switch (errno) {
      case EPERM:
      case ENOENT:
      case ENOPROTOOPT:
        continue;
      }
      exit(1);
    }
    if (table->info.size > sizeof(table->replace.entrytable))
      exit(1);
    if (table->info.num_entries > XT_MAX_ENTRIES)
      exit(1);
    struct arpt_get_entries entries;
    memset(&entries, 0, sizeof(entries));
    strcpy(entries.name, table->name);
    entries.size = table->info.size;
    optlen = sizeof(entries) - sizeof(entries.entrytable) + table->info.size;
    if (getsockopt(fd, SOL_IP, ARPT_SO_GET_ENTRIES, &entries, &optlen))
      exit(1);
    table->replace.valid_hooks = table->info.valid_hooks;
    table->replace.num_entries = table->info.num_entries;
    table->replace.size = table->info.size;
    memcpy(table->replace.hook_entry, table->info.hook_entry,
           sizeof(table->replace.hook_entry));
    memcpy(table->replace.underflow, table->info.underflow,
           sizeof(table->replace.underflow));
    memcpy(table->replace.entrytable, entries.entrytable, table->info.size);
  }
  close(fd);
}

static void reset_arptables()
{
  int fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
  if (fd == -1) {
    switch (errno) {
    case EAFNOSUPPORT:
    case ENOPROTOOPT:
      return;
    }
    exit(1);
  }
  for (unsigned i = 0; i < sizeof(arpt_tables) / sizeof(arpt_tables[0]); i++) {
    struct arpt_table_desc* table = &arpt_tables[i];
    if (table->info.valid_hooks == 0)
      continue;
    struct arpt_getinfo info;
    memset(&info, 0, sizeof(info));
    strcpy(info.name, table->name);
    socklen_t optlen = sizeof(info);
    if (getsockopt(fd, SOL_IP, ARPT_SO_GET_INFO, &info, &optlen))
      exit(1);
    if (memcmp(&table->info, &info, sizeof(table->info)) == 0) {
      struct arpt_get_entries entries;
      memset(&entries, 0, sizeof(entries));
      strcpy(entries.name, table->name);
      entries.size = table->info.size;
      optlen = sizeof(entries) - sizeof(entries.entrytable) + entries.size;
      if (getsockopt(fd, SOL_IP, ARPT_SO_GET_ENTRIES, &entries, &optlen))
        exit(1);
      if (memcmp(table->replace.entrytable, entries.entrytable,
                 table->info.size) == 0)
        continue;
    } else {
    }
    struct xt_counters counters[XT_MAX_ENTRIES];
    table->replace.num_counters = info.num_entries;
    table->replace.counters = counters;
    optlen = sizeof(table->replace) - sizeof(table->replace.entrytable) +
             table->replace.size;
    if (setsockopt(fd, SOL_IP, ARPT_SO_SET_REPLACE, &table->replace, optlen))
      exit(1);
  }
  close(fd);
}

#define NF_BR_NUMHOOKS 6
#define EBT_TABLE_MAXNAMELEN 32
#define EBT_CHAIN_MAXNAMELEN 32
#define EBT_BASE_CTL 128
#define EBT_SO_SET_ENTRIES (EBT_BASE_CTL)
#define EBT_SO_GET_INFO (EBT_BASE_CTL)
#define EBT_SO_GET_ENTRIES (EBT_SO_GET_INFO + 1)
#define EBT_SO_GET_INIT_INFO (EBT_SO_GET_ENTRIES + 1)
#define EBT_SO_GET_INIT_ENTRIES (EBT_SO_GET_INIT_INFO + 1)

struct ebt_replace {
  char name[EBT_TABLE_MAXNAMELEN];
  unsigned int valid_hooks;
  unsigned int nentries;
  unsigned int entries_size;
  struct ebt_entries* hook_entry[NF_BR_NUMHOOKS];
  unsigned int num_counters;
  struct ebt_counter* counters;
  char* entries;
};

struct ebt_entries {
  unsigned int distinguisher;
  char name[EBT_CHAIN_MAXNAMELEN];
  unsigned int counter_offset;
  int policy;
  unsigned int nentries;
  char data[0] __attribute__((aligned(__alignof__(struct ebt_replace))));
};

struct ebt_table_desc {
  const char* name;
  struct ebt_replace replace;
  char entrytable[XT_TABLE_SIZE];
};

static struct ebt_table_desc ebt_tables[] = {
    {.name = "filter"},
    {.name = "nat"},
    {.name = "broute"},
};

static void checkpoint_ebtables(void)
{
  int fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
  if (fd == -1) {
    switch (errno) {
    case EAFNOSUPPORT:
    case ENOPROTOOPT:
      return;
    }
    exit(1);
  }
  for (size_t i = 0; i < sizeof(ebt_tables) / sizeof(ebt_tables[0]); i++) {
    struct ebt_table_desc* table = &ebt_tables[i];
    strcpy(table->replace.name, table->name);
    socklen_t optlen = sizeof(table->replace);
    if (getsockopt(fd, SOL_IP, EBT_SO_GET_INIT_INFO, &table->replace,
                   &optlen)) {
      switch (errno) {
      case EPERM:
      case ENOENT:
      case ENOPROTOOPT:
        continue;
      }
      exit(1);
    }
    if (table->replace.entries_size > sizeof(table->entrytable))
      exit(1);
    table->replace.num_counters = 0;
    table->replace.entries = table->entrytable;
    optlen = sizeof(table->replace) + table->replace.entries_size;
    if (getsockopt(fd, SOL_IP, EBT_SO_GET_INIT_ENTRIES, &table->replace,
                   &optlen))
      exit(1);
  }
  close(fd);
}

static void reset_ebtables()
{
  int fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
  if (fd == -1) {
    switch (errno) {
    case EAFNOSUPPORT:
    case ENOPROTOOPT:
      return;
    }
    exit(1);
  }
  for (unsigned i = 0; i < sizeof(ebt_tables) / sizeof(ebt_tables[0]); i++) {
    struct ebt_table_desc* table = &ebt_tables[i];
    if (table->replace.valid_hooks == 0)
      continue;
    struct ebt_replace replace;
    memset(&replace, 0, sizeof(replace));
    strcpy(replace.name, table->name);
    socklen_t optlen = sizeof(replace);
    if (getsockopt(fd, SOL_IP, EBT_SO_GET_INFO, &replace, &optlen))
      exit(1);
    replace.num_counters = 0;
    table->replace.entries = 0;
    for (unsigned h = 0; h < NF_BR_NUMHOOKS; h++)
      table->replace.hook_entry[h] = 0;
    if (memcmp(&table->replace, &replace, sizeof(table->replace)) == 0) {
      char entrytable[XT_TABLE_SIZE];
      memset(&entrytable, 0, sizeof(entrytable));
      replace.entries = entrytable;
      optlen = sizeof(replace) + replace.entries_size;
      if (getsockopt(fd, SOL_IP, EBT_SO_GET_ENTRIES, &replace, &optlen))
        exit(1);
      if (memcmp(table->entrytable, entrytable, replace.entries_size) == 0)
        continue;
    }
    for (unsigned j = 0, h = 0; h < NF_BR_NUMHOOKS; h++) {
      if (table->replace.valid_hooks & (1 << h)) {
        table->replace.hook_entry[h] =
            (struct ebt_entries*)table->entrytable + j;
        j++;
      }
    }
    table->replace.entries = table->entrytable;
    optlen = sizeof(table->replace) + table->replace.entries_size;
    if (setsockopt(fd, SOL_IP, EBT_SO_SET_ENTRIES, &table->replace, optlen))
      exit(1);
  }
  close(fd);
}

static void checkpoint_net_namespace(void)
{
  checkpoint_ebtables();
  checkpoint_arptables();
  checkpoint_iptables(ipv4_tables, sizeof(ipv4_tables) / sizeof(ipv4_tables[0]),
                      AF_INET, SOL_IP);
  checkpoint_iptables(ipv6_tables, sizeof(ipv6_tables) / sizeof(ipv6_tables[0]),
                      AF_INET6, SOL_IPV6);
}

static void reset_net_namespace(void)
{
  reset_ebtables();
  reset_arptables();
  reset_iptables(ipv4_tables, sizeof(ipv4_tables) / sizeof(ipv4_tables[0]),
                 AF_INET, SOL_IP);
  reset_iptables(ipv6_tables, sizeof(ipv6_tables) / sizeof(ipv6_tables[0]),
                 AF_INET6, SOL_IPV6);
}

static void mount_cgroups(const char* dir, const char** controllers, int count)
{
  if (mkdir(dir, 0777)) {
  }
  char enabled[128] = {0};
  int i = 0;
  for (; i < count; i++) {
    if (mount("none", dir, "cgroup", 0, controllers[i])) {
      continue;
    }
    umount(dir);
    strcat(enabled, ",");
    strcat(enabled, controllers[i]);
  }
  if (enabled[0] == 0)
    return;
  if (mount("none", dir, "cgroup", 0, enabled + 1)) {
  }
  if (chmod(dir, 0777)) {
  }
}

static void setup_cgroups()
{
  const char* unified_controllers[] = {"+cpu", "+memory", "+io", "+pids"};
  const char* net_controllers[] = {"net", "net_prio", "devices", "blkio",
                                   "freezer"};
  const char* cpu_controllers[] = {"cpuset", "cpuacct", "hugetlb", "rlimit"};
  if (mkdir("/syzcgroup", 0777)) {
  }
  if (mkdir("/syzcgroup/unified", 0777)) {
  }
  if (mount("none", "/syzcgroup/unified", "cgroup2", 0, NULL)) {
  }
  if (chmod("/syzcgroup/unified", 0777)) {
  }
  int unified_control =
      open("/syzcgroup/unified/cgroup.subtree_control", O_WRONLY);
  if (unified_control != -1) {
    unsigned i;
    for (i = 0;
         i < sizeof(unified_controllers) / sizeof(unified_controllers[0]); i++)
      if (write(unified_control, unified_controllers[i],
                strlen(unified_controllers[i])) < 0) {
      }
    close(unified_control);
  }
  mount_cgroups("/syzcgroup/net", net_controllers,
                sizeof(net_controllers) / sizeof(net_controllers[0]));
  mount_cgroups("/syzcgroup/cpu", cpu_controllers,
                sizeof(cpu_controllers) / sizeof(cpu_controllers[0]));
  write_file("/syzcgroup/cpu/cgroup.clone_children", "1");
  write_file("/syzcgroup/cpu/cpuset.memory_pressure_enabled", "1");
}

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)) {
  }
}

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);
  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_tun();
  initialize_netdevices();
  initialize_wifi_devices();
  setup_binderfs();
  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 | UMOUNT_NOFOLLOW) == 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 | UMOUNT_NOFOLLOW) == 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 | UMOUNT_NOFOLLOW))
        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 | UMOUNT_NOFOLLOW))
          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();
  checkpoint_net_namespace();
}

static void reset_loop()
{
  reset_net_namespace();
}

static void setup_test()
{
  prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
  setpgrp();
  setup_cgroups_test();
  write_file("/proc/self/oom_score_adj", "1000");
  flush_tun();
  if (symlink("/dev/binderfs", "./binderfs")) {
  }
}

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");
}

static void setup_sysctl()
{
  char mypid[32];
  snprintf(mypid, sizeof(mypid), "%d", getpid());
  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/net/ipv4/ping_group_range", "0 65535"},
      {"/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", mypid},
  };
  for (size_t i = 0; i < sizeof(files) / sizeof(files[0]); i++) {
    if (!write_file(files[i].name, files[i].data))
      printf("write to %s failed: %s\n", files[i].name, strerror(errno));
  }
}

#define NL802154_CMD_SET_SHORT_ADDR 11
#define NL802154_ATTR_IFINDEX 3
#define NL802154_ATTR_SHORT_ADDR 10

static void setup_802154()
{
  int sock_route = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
  if (sock_route == -1)
    exit(1);
  int sock_generic = socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC);
  if (sock_generic < 0)
    exit(1);
  int nl802154_family_id =
      netlink_query_family_id(&nlmsg, sock_generic, "nl802154", true);
  for (int i = 0; i < 2; i++) {
    char devname[] = "wpan0";
    devname[strlen(devname) - 1] += i;
    uint64_t hwaddr = 0xaaaaaaaaaaaa0002 + (i << 8);
    uint16_t shortaddr = 0xaaa0 + i;
    int ifindex = if_nametoindex(devname);
    struct genlmsghdr genlhdr;
    memset(&genlhdr, 0, sizeof(genlhdr));
    genlhdr.cmd = NL802154_CMD_SET_SHORT_ADDR;
    netlink_init(&nlmsg, nl802154_family_id, 0, &genlhdr, sizeof(genlhdr));
    netlink_attr(&nlmsg, NL802154_ATTR_IFINDEX, &ifindex, sizeof(ifindex));
    netlink_attr(&nlmsg, NL802154_ATTR_SHORT_ADDR, &shortaddr,
                 sizeof(shortaddr));
    int err = netlink_send(&nlmsg, sock_generic);
    if (err < 0) {
    }
    netlink_device_change(&nlmsg, sock_route, devname, true, 0, &hwaddr,
                          sizeof(hwaddr), 0);
    if (i == 0) {
      netlink_add_device_impl(&nlmsg, "lowpan", "lowpan0");
      netlink_done(&nlmsg);
      netlink_attr(&nlmsg, IFLA_LINK, &ifindex, sizeof(ifindex));
      int err = netlink_send(&nlmsg, sock_route);
      if (err < 0) {
      }
    }
  }
  close(sock_route);
  close(sock_generic);
}

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 < 17; 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);
      if (call == 0 || call == 1 || call == 3 || call == 5 || call == 8 ||
          call == 10 || call == 11 || call == 12 || call == 13 || call == 14 ||
          call == 15)
        break;
      event_timedwait(&th->done, 50);
      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);
    reset_loop();
    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 < 5000)
        continue;
      kill_and_wait(pid, &status);
      break;
    }
    remove_dir(cwdbuf);
  }
}

uint64_t r[4] = {0xffffffffffffffff, 0xffffffffffffffff, 0x0,
                 0xffffffffffffffff};

void execute_call(int call)
{
  intptr_t res = 0;
  switch (call) {
  case 0:
    NONFAILING(*(uint32_t*)0x20000700 = 1);
    NONFAILING(*(uint32_t*)0x20000704 = 0x80);
    NONFAILING(*(uint8_t*)0x20000708 = 0);
    NONFAILING(*(uint8_t*)0x20000709 = 0);
    NONFAILING(*(uint8_t*)0x2000070a = 0);
    NONFAILING(*(uint8_t*)0x2000070b = 0);
    NONFAILING(*(uint32_t*)0x2000070c = 0);
    NONFAILING(*(uint64_t*)0x20000710 = 0x50d);
    NONFAILING(*(uint64_t*)0x20000718 = 0);
    NONFAILING(*(uint64_t*)0x20000720 = 0);
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000728, 0, 0, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000728, 0, 1, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000728, 0, 2, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000728, 0, 3, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000728, 0, 4, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000728, 0, 5, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000728, 0, 6, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000728, 0, 7, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000728, 0, 8, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000728, 0, 9, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000728, 0, 10, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000728, 0, 11, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000728, 0, 12, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000728, 0, 13, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000728, 0, 14, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000728, 0, 15, 2));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000728, 0, 17, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000728, 0, 18, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000728, 0, 19, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000728, 0, 20, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000728, 0, 21, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000728, 0, 22, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000728, 0, 23, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000728, 0, 24, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000728, 0, 25, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000728, 0, 26, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000728, 0, 27, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000728, 0, 28, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000728, 0, 29, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000728, 0, 30, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000728, 0, 31, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000728, 0, 32, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000728, 0, 33, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000728, 0, 34, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000728, 0, 35, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000728, 0, 36, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000728, 0, 37, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000728, 0, 38, 26));
    NONFAILING(*(uint32_t*)0x20000730 = 0);
    NONFAILING(*(uint32_t*)0x20000734 = 0);
    NONFAILING(*(uint64_t*)0x20000738 = 0);
    NONFAILING(*(uint64_t*)0x20000740 = 0);
    NONFAILING(*(uint64_t*)0x20000748 = 0);
    NONFAILING(*(uint64_t*)0x20000750 = 0);
    NONFAILING(*(uint32_t*)0x20000758 = 0);
    NONFAILING(*(uint32_t*)0x2000075c = 0);
    NONFAILING(*(uint64_t*)0x20000760 = 0);
    NONFAILING(*(uint32_t*)0x20000768 = 0);
    NONFAILING(*(uint16_t*)0x2000076c = 0);
    NONFAILING(*(uint16_t*)0x2000076e = 0);
    NONFAILING(*(uint32_t*)0x20000770 = 0);
    NONFAILING(*(uint32_t*)0x20000774 = 0);
    NONFAILING(*(uint64_t*)0x20000778 = 0);
    syscall(__NR_perf_event_open, 0x20000700ul, 0, 0xff7ffffffffffffful, -1,
            0ul);
    break;
  case 1:
    syscall(__NR_sendmsg, -1, 0ul, 0ul);
    break;
  case 2:
    res = syscall(__NR_socket, 0x10ul, 3ul, 0);
    if (res != -1)
      r[0] = res;
    break;
  case 3:
    syscall(__NR_ioctl, -1, 0x40082404, 0ul);
    break;
  case 4:
    NONFAILING(*(uint32_t*)0x20000780 = 0);
    NONFAILING(*(uint32_t*)0x20000784 = 0x80);
    NONFAILING(*(uint8_t*)0x20000788 = 0);
    NONFAILING(*(uint8_t*)0x20000789 = 0);
    NONFAILING(*(uint8_t*)0x2000078a = 0);
    NONFAILING(*(uint8_t*)0x2000078b = 0);
    NONFAILING(*(uint32_t*)0x2000078c = 0);
    NONFAILING(*(uint64_t*)0x20000790 = 0);
    NONFAILING(*(uint64_t*)0x20000798 = 0x20);
    NONFAILING(*(uint64_t*)0x200007a0 = 5);
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x200007a8, 0, 0, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x200007a8, 0, 1, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x200007a8, 0, 2, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x200007a8, 0, 3, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x200007a8, 0, 4, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x200007a8, 0, 5, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x200007a8, 0, 6, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x200007a8, 0, 7, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x200007a8, 0, 8, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x200007a8, 0, 9, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x200007a8, 0, 10, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x200007a8, 0, 11, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x200007a8, 0, 12, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x200007a8, 0, 13, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x200007a8, 0, 14, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x200007a8, 0, 15, 2));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x200007a8, 0, 17, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x200007a8, 0, 18, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x200007a8, 0, 19, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x200007a8, 0, 20, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x200007a8, 0, 21, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x200007a8, 0, 22, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x200007a8, 0, 23, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x200007a8, 0, 24, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x200007a8, 0, 25, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x200007a8, 0, 26, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x200007a8, 0, 27, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x200007a8, 0, 28, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x200007a8, 0, 29, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x200007a8, 0, 30, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x200007a8, 0, 31, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x200007a8, 0, 32, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x200007a8, 0, 33, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x200007a8, 0, 34, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x200007a8, 0, 35, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x200007a8, 0, 36, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x200007a8, 0, 37, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x200007a8, 0, 38, 26));
    NONFAILING(*(uint32_t*)0x200007b0 = 0x100002);
    NONFAILING(*(uint32_t*)0x200007b4 = 1);
    NONFAILING(*(uint64_t*)0x200007b8 = 0x20000480);
    NONFAILING(*(uint64_t*)0x200007c0 = 0);
    NONFAILING(*(uint64_t*)0x200007c8 = 0x2360);
    NONFAILING(*(uint64_t*)0x200007d0 = 0x400);
    NONFAILING(*(uint32_t*)0x200007d8 = 0);
    NONFAILING(*(uint32_t*)0x200007dc = 5);
    NONFAILING(*(uint64_t*)0x200007e0 = 0);
    NONFAILING(*(uint32_t*)0x200007e8 = 0);
    NONFAILING(*(uint16_t*)0x200007ec = 0);
    NONFAILING(*(uint16_t*)0x200007ee = 0);
    NONFAILING(*(uint32_t*)0x200007f0 = 0);
    NONFAILING(*(uint32_t*)0x200007f4 = 0);
    NONFAILING(*(uint64_t*)0x200007f8 = 0);
    res = syscall(__NR_perf_event_open, 0x20000780ul, 0, 0xfffffdfffffffffful,
                  -1, 8ul);
    if (res != -1)
      r[1] = res;
    break;
  case 5:
    syscall(__NR_socket, 0x11ul, 2ul, 0x300);
    {
      int i;
      for (i = 0; i < 32; i++) {
        syscall(__NR_socket, 0x11ul, 2ul, 0x300);
      }
    }
    break;
  case 6:
    NONFAILING(memcpy((void*)0x20000080, "batadv_slave_0\000\000", 16));
    res = syscall(__NR_ioctl, -1, 0x8933, 0x20000080ul);
    {
      int i;
      for (i = 0; i < 32; i++) {
        syscall(__NR_ioctl, -1, 0x8933, 0x20000080ul);
      }
    }
    if (res != -1)
      NONFAILING(r[2] = *(uint32_t*)0x20000090);
    break;
  case 7:
    NONFAILING(*(uint64_t*)0x20000080 = 0);
    NONFAILING(*(uint32_t*)0x20000088 = 0);
    NONFAILING(*(uint64_t*)0x20000090 = 0x20000140);
    NONFAILING(*(uint64_t*)0x20000140 = 0x20001040);
    NONFAILING(memcpy((void*)0x20001040,
                      "\x34\x00\x00\x00\x11\x00\x01\x50\x50\x7d\x1f\xc7\x4e\x85"
                      "\xd1\xe5\xcb\x45\xb2\xbc",
                      20));
    NONFAILING(*(uint32_t*)0x20001054 = r[2]);
    NONFAILING(memcpy(
        (void*)0x20001058,
        "\x01\x29\x2d\x87\x08\x37\xa8\x16\xf6\xc1\x2d\xc4\xe5\x84\x00\x10\x00"
        "\x00\x00\x00\x14\x00\x35\x00\x73\x02\x24\x70\x91\x9d\x98\x34\xba\xea"
        "\x48\x11\xe5\x00\x00\xcb\xd0\xeb\xb4\x34\x03\x44\x6b\x69\x19\x30\xf1"
        "\x7e\x56\x3d\xe3\x42\x65\x94\x79\x2a\x10\x42\xf9\xda\x4a\xea\x04\xc0"
        "\xdd\x58\x38\x91\x26\xb0\x42\x43\x69\xa1\xf5\xc9\x6d\xc0\xd5\xea\x28"
        "\x64\x2d\x02\xd1\x03\xc8\x31\x0d\x30\xfa\x59\x04\x68\x57\xdc\xeb\x31"
        "\x80\xb3\x07\xf7\x32\x8a\x19\xaa\x4d\x4c\xf8\xdc\x5d\xe5\x74\xd4\xd8"
        "\x25\x86\xb3\x3b\x78\x8c\xaf\x96\x3a\xb3\x72\x65\x72\xa6\xf8\xad\x00"
        "\x72\xa4\x8f\xad\x0a\x91\x8d\x99\xa2\x39\xe3\xb8\x95\xa5\x44\x57\x52"
        "\x29\x8d\x31\x5c\xac\x66\x92\x84\x50\x13\x5d\xf3\xfd\x39\xe7\xf4\xd0"
        "\x92\xe1\x0a\x2f\xc9\xb7\x49\x23\xb2\xed\x5d\x46\x7c\x8e\x45\xe0\xdc"
        "\x8d\x8e\x5f\x24\x03\x97\xe2\x2d\x51\xca\x83\x3c\xfd\x65\x1f\x7a\x17"
        "\x56\x07\xa4\xdf\x34\xb4\xc5\xe5\xb6\x0d\x53\x4f\x61\x90\xe6\x1f\x2d"
        "\x42\x8e\x44\x03\x88\xa7\xd3\x34\x55\x29\x63\xa2\xc0\xdd\xcb\xb6\xb1"
        "\x64\x13\x96\xfe\x4a\x82\xaf\x07\xfe\x09\xbc\xfb\x38\x17\x50\x0e\xf4"
        "\x36\x17\x7a\x0b\x2f\x96\xf7\x62\xbc\x19\x0d\x3c\x71\x14\x22\xa8\xf5"
        "\x8e\xff\x65\xd0\x78\xea\x45\x94\x52\x0f\x15\xc4\xb8\xf7\xb5\xa7\x6c"
        "\xa8\x8f\xb8\xa7\x92\xa4\x76\x21\x44\xe2\xe7\x21\xff\x01\xab\xd5\x3d"
        "\xee\x21\x3b\x9a\xd0\x9a\x62\x9e\x1c\x39\xad\xdf\x95\xdb\xab\xf4\xab"
        "\x32\xdf\xe7\xcb\x52\x04\x75\xe3\xdb\x2f\xeb\x0f",
        335));
    NONFAILING(*(uint64_t*)0x20000148 = 0x34);
    NONFAILING(*(uint64_t*)0x20000098 = 1);
    NONFAILING(*(uint64_t*)0x200000a0 = 0);
    NONFAILING(*(uint64_t*)0x200000a8 = 0);
    NONFAILING(*(uint32_t*)0x200000b0 = 0);
    syscall(__NR_sendmsg, -1, 0x20000080ul, 0x40ul);
    break;
  case 8:
    syscall(__NR_socket, 0x10ul, 3ul, 0x10);
    break;
  case 9:
    NONFAILING(*(uint32_t*)0x200003c0 = 1);
    NONFAILING(*(uint32_t*)0x200003c4 = 1);
    NONFAILING(*(uint32_t*)0x200003c8 = 0x18);
    NONFAILING(*(uint32_t*)0x200003cc = -1);
    NONFAILING(*(uint32_t*)0x200003d0 = 0x10000);
    NONFAILING(memcpy((void*)0x200003d8, "./file0\000", 8));
    res = syscall(__NR_ioctl, -1, 0xc0189373, 0x200003c0ul);
    if (res != -1)
      NONFAILING(r[3] = *(uint32_t*)0x200003cc);
    break;
  case 10:
    NONFAILING(*(uint32_t*)0x20000340 = 3);
    NONFAILING(*(uint32_t*)0x20000344 = 0x80);
    NONFAILING(*(uint8_t*)0x20000348 = 0xfd);
    NONFAILING(*(uint8_t*)0x20000349 = 6);
    NONFAILING(*(uint8_t*)0x2000034a = 3);
    NONFAILING(*(uint8_t*)0x2000034b = 7);
    NONFAILING(*(uint32_t*)0x2000034c = 0);
    NONFAILING(*(uint64_t*)0x20000350 = 4);
    NONFAILING(*(uint64_t*)0x20000358 = 0x1000);
    NONFAILING(*(uint64_t*)0x20000360 = 1);
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 0, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000368, 1, 1, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000368, 1, 2, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000368, 1, 3, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 4, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000368, 1, 5, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 6, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000368, 1, 7, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000368, 1, 8, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000368, 1, 9, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 10, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000368, 1, 11, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000368, 1, 12, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000368, 1, 13, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 14, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000368, 1, 15, 2));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 17, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 18, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000368, 1, 19, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 20, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 21, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 22, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000368, 1, 23, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 24, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 25, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 26, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000368, 1, 27, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 28, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000368, 1, 29, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 30, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 31, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 32, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000368, 1, 33, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 34, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 35, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 36, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000368, 1, 37, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000368, 0, 38, 26));
    NONFAILING(*(uint32_t*)0x20000370 = 1);
    NONFAILING(*(uint32_t*)0x20000374 = 2);
    NONFAILING(*(uint64_t*)0x20000378 = 5);
    NONFAILING(*(uint64_t*)0x20000380 = 8);
    NONFAILING(*(uint64_t*)0x20000388 = 0x12942);
    NONFAILING(*(uint64_t*)0x20000390 = 0x3af);
    NONFAILING(*(uint32_t*)0x20000398 = 0x8d8);
    NONFAILING(*(uint32_t*)0x2000039c = 0);
    NONFAILING(*(uint64_t*)0x200003a0 = 4);
    NONFAILING(*(uint32_t*)0x200003a8 = 3);
    NONFAILING(*(uint16_t*)0x200003ac = 0x80);
    NONFAILING(*(uint16_t*)0x200003ae = 0);
    NONFAILING(*(uint32_t*)0x200003b0 = 9);
    NONFAILING(*(uint32_t*)0x200003b4 = 0);
    NONFAILING(*(uint64_t*)0x200003b8 = 0xfffffffffffff326);
    syscall(__NR_perf_event_open, 0x20000340ul, -1, 0x10ul, r[3], 6ul);
    break;
  case 11:
    NONFAILING(*(uint64_t*)0x20000800 = 0);
    NONFAILING(*(uint32_t*)0x20000808 = 0);
    NONFAILING(*(uint64_t*)0x20000810 = 0x200006c0);
    NONFAILING(*(uint64_t*)0x200006c0 = 0x20000f40);
    NONFAILING(*(uint64_t*)0x200006c8 = 0);
    NONFAILING(*(uint64_t*)0x200006d0 = 0x20000bc0);
    NONFAILING(memcpy(
        (void*)0x20000bc0,
        "\x17\x31\xec\xa5\x03\xd6\xbd\x4c\x15\xcd\xa1\x71\xaa\x8b\x3c\xf9\xba"
        "\xd4\x75\x5e\xc8\x91\xa8\xd1\x3e\x2b\x07\xd9\xda\x18\x3b\x9e\xb6\x79"
        "\x8d\x03\xfc\x01\x5b\x73\x33\x4c\xa5\x84\xac\xad\x87\x8e\xa1\xea\xd3"
        "\x02\x38\xe4\x40\xdf\x48\xab\xa5\x40\xcb\x1c\x47\x45\x42\x73\x92\xec"
        "\x36\x74\x83\x43\xba\x6e\x61\x04\xc4\xba\xa7\x11\xf7\x36\xfc\x82\xcd"
        "\x83\x4c\xbf\x5f\xf6\x8b\x1e\x43\xbf\xb0\xb6\xea\xfc\x82\x76\xef\x17"
        "\x11\x19\xdc\x71\xa1\xfa\x71\xf8\xbc\xb2\xc0\x9a\xd1\x17\xc0\x45\xbc"
        "\x63\x12\x71\x85\x8c\x33\x13\x7f\x62\xcb\x48\xba\xca\x44\xf3\xd8\xe1"
        "\xd4\xe3\x58\xae\x29\xbd\x96\xe0\xf4\xde\x67\x6a\x8e\x61\xd1\x57\x8c"
        "\x69\x5d\xd8\x94\x9e\x22\xac\x49\x96\x36\xf2\x49\x89\xa5\xef\x3a\xf1"
        "\xfa\x41\x39\x2b\x80\xc6\xaa\x15\x1e\x19\x79\x27\x07\xb5\x8e\x81\x52"
        "\x07\x1a\xa7\x03\xff",
        192));
    NONFAILING(*(uint64_t*)0x200006d8 = 0xc0);
    NONFAILING(*(uint64_t*)0x200006e0 = 0x20000cc0);
    NONFAILING(memcpy(
        (void*)0x20000cc0,
        "\x65\xf9\x44\xd4\xbc\xa8\xab\xf1\xf5\xea\xac\xe1\x61\xf1\xad\x93\x80"
        "\x7f\xb9\xd5\xb9\x53\x70\xb4\x61\xe5\xf7\xb2\x8c\x56\x39\xce\x73\x87"
        "\xdb\x59\xfb\x66\x6e\x8a\xd5\x83\x3d\x04\xbc\xef\x50\x33\x7a\xe4\x9a"
        "\xa3\xbc\x25\x52\x2b\x3f\xe4\x1b\xa3\x28\xf2\x47\x75\xef\xef\x1e\x08"
        "\xea\xf9\x66\x10\x36\x4a\x16\xf1\x46\x0a\x7c\x7f\xf4\x10\x0b\x87\x63"
        "\xed\x5f\xe5\x75\xf4\x1f\x48\xa5\x4b\xd6\xa5\x5c\x6d\x5e\x90\xb3\x2e"
        "\x25\x12\x93\x0b\x78\x6d\x5d\x50\x81\x87\xc7\x77\xb5\x96\x7a\x03\xbf"
        "\x9c\xb6\x70\x5b\x64\x0e\xca\x8d\x8c\x0b\x04\xda\x29\x77\x25\x46\x86"
        "\xe4\x87\x0e\xf7\x93\x23\x98\xe7\xd2\x38\x16\x07\x86\x80\xb9\xcb\x32"
        "\x40\x8f\x29\x25\x3e\x5a\xdb\x61\xa0\x71\xdd\x29\x41\xcd\x75\xf9\xa7"
        "\xca\x57\x2c\xed\x06",
        175));
    NONFAILING(*(uint64_t*)0x200006e8 = 0xaf);
    NONFAILING(*(uint64_t*)0x20000818 = 3);
    NONFAILING(*(uint64_t*)0x20000820 = 0x200004c0);
    NONFAILING(memcpy(
        (void*)0x200004c0,
        "\x20\x00\x00\x00\x00\x00\x00\x00\x01\x00\xc8\x00\x01\x00\x00\x00\xc1"
        "\xda\x65\xc4\xbc\x05\xc7\x18\x88\x95\x29\xe3\x7c\x89\x8a\x9a\x5d\x7c"
        "\x71\x6f\xe6\x46\x26\xeb\x4f\xdf\x67\x8f\x24\x6e\x29\x2c\xea\xd3\x6a"
        "\x1d\x94\xb6\xdd\x15\xfe\x27\xf6\x8b\xb5\x3f\xbf\xfc\x75\xb7\xac\x70"
        "\x88\x01\x00\x00\x00\x01\x00\x00\x00\x30\xa7\x4a\xb0\xb6\x96\xda\x81"
        "\x68\x55\x1a\xf2\xe4\x79\x10\xcc\x36\x5d\x59\x75\xcb\xfd\x4b\x7c\xa3"
        "\x72\x84\x9d\x58\xee\xb1\x74\x08\x97\x12\xe2\x93\xbd\x40",
        116));
    NONFAILING(sprintf((char*)0x20000534, "%023llo", (long long)r[2]));
    NONFAILING(*(uint32_t*)0x2000054b = -1);
    NONFAILING(*(uint16_t*)0x2000054f = -1);
    NONFAILING(*(uint64_t*)0x20000551 = -1);
    NONFAILING(memcpy(
        (void*)0x20000559,
        "\xdb\x13\x03\xc3\x01\xe9\xeb\x04\x5a\x7f\x18\x6f\xd1\x77\xe2\x10\xb5"
        "\x6b\x59\xe2\x12\x51\x5e\x12\x84\x26\x6f\xc7\x34\x22\xe0\xd9\xa2\xf0"
        "\xba\x74\x5c\x14\x25\x22\x0a\x47\x2d\x83\x2f\x8b\x6b\x14\x71\xd0\x78"
        "\x95\x01\x22\x8b\x23\x5a\x6c\x09\x31\xc6\x7a\xfa\xf8\x50\x30\xb7\x67"
        "\x0c\x8a\x76\x62\xf2\xc0\xfa\x93\x4d\x71\xd9\xd0\x57\x56\x36\x84\x76"
        "\x1c\xb4\x41\x1c\x75\x99\x29\x4b\x2d\xda\x78\x99\x7a\xfe\x82\xea\xbc"
        "\xc1\x89\x14\x9a\x55\xa6\x14\x0e\xec\xb4\x35\x57\x42\xd8\xe6\xef\xc1"
        "\xbd\x2b\x50\x45\xb2\x4e\x32\x6a\x83\x94\xa9\x6a\xa0\xba\xf6\x9a\x3e"
        "\x56\x65\xbc\x62\x69\x4c\xe5\xae\x3d\x5d\x8b\xa2\x30\x61\x93\x34\x1a"
        "\x5e\x90\x94\xfd\xad\x73\x11\x4c\x0e\xdb\xcb\x75\xd0\x30\xc7\xa9\xcb"
        "\x87\xe2\xc9\x78\xbc\x6c\xee\x40\x45\x03\x10\x34\x0a\x1d\x56\x1e\x1e"
        "\x20\xb3",
        189));
    NONFAILING(*(uint32_t*)0x20000616 = -1);
    NONFAILING(*(uint32_t*)0x2000061a = r[1]);
    NONFAILING(sprintf((char*)0x2000061e, "%020llu", (long long)-1));
    NONFAILING(sprintf((char*)0x20000632, "%020llu", (long long)r[1]));
    NONFAILING(sprintf((char*)0x20000646, "%023llo", (long long)-1));
    NONFAILING(*(uint64_t*)0x2000065d = -1);
    NONFAILING(*(uint64_t*)0x20000828 = 0x58);
    NONFAILING(*(uint32_t*)0x20000830 = 0);
    syscall(__NR_sendmsg, -1, 0x20000800ul, 0ul);
    {
      int i;
      for (i = 0; i < 32; i++) {
        syscall(__NR_sendmsg, -1, 0x20000800ul, 0ul);
      }
    }
    break;
  case 12:
    NONFAILING(*(uint64_t*)0x20000300 = 0x20000200);
    NONFAILING(*(uint16_t*)0x20000200 = 0x10);
    NONFAILING(*(uint16_t*)0x20000202 = 0);
    NONFAILING(*(uint32_t*)0x20000204 = 0);
    NONFAILING(*(uint32_t*)0x20000208 = 0x80000);
    NONFAILING(*(uint32_t*)0x20000308 = 0xc);
    NONFAILING(*(uint64_t*)0x20000310 = 0x200002c0);
    NONFAILING(*(uint64_t*)0x200002c0 = 0x20000240);
    NONFAILING(*(uint32_t*)0x20000240 = 0x64);
    NONFAILING(*(uint16_t*)0x20000244 = 0x14);
    NONFAILING(*(uint16_t*)0x20000246 = 0);
    NONFAILING(*(uint32_t*)0x20000248 = 0x70bd26);
    NONFAILING(*(uint32_t*)0x2000024c = 0x25dfdbfe);
    NONFAILING(*(uint8_t*)0x20000250 = 0xa);
    NONFAILING(*(uint8_t*)0x20000251 = 0x20);
    NONFAILING(*(uint8_t*)0x20000252 = 0xe);
    NONFAILING(*(uint8_t*)0x20000253 = 0xfe);
    NONFAILING(*(uint32_t*)0x20000254 = r[2]);
    NONFAILING(*(uint16_t*)0x20000258 = 8);
    NONFAILING(*(uint16_t*)0x2000025a = 0xa);
    NONFAILING(*(uint32_t*)0x2000025c = 4);
    NONFAILING(*(uint16_t*)0x20000260 = 8);
    NONFAILING(*(uint16_t*)0x20000262 = 0xa);
    NONFAILING(*(uint32_t*)0x20000264 = 1);
    NONFAILING(*(uint16_t*)0x20000268 = 0x14);
    NONFAILING(*(uint16_t*)0x2000026a = 1);
    NONFAILING(*(uint8_t*)0x2000026c = 0xfc);
    NONFAILING(*(uint8_t*)0x2000026d = 1);
    NONFAILING(memset((void*)0x2000026e, 0, 13));
    NONFAILING(*(uint8_t*)0x2000027b = 0);
    NONFAILING(*(uint16_t*)0x2000027c = 0x14);
    NONFAILING(*(uint16_t*)0x2000027e = 2);
    NONFAILING(*(uint8_t*)0x20000280 = 0xfc);
    NONFAILING(*(uint8_t*)0x20000281 = 1);
    NONFAILING(memset((void*)0x20000282, 0, 13));
    NONFAILING(*(uint8_t*)0x2000028f = 1);
    NONFAILING(*(uint16_t*)0x20000290 = 0x14);
    NONFAILING(*(uint16_t*)0x20000292 = 1);
    NONFAILING(memcpy(
        (void*)0x20000294,
        " \001\000\000\000\000\000\000\000\000\000\000\000\000\000\001", 16));
    NONFAILING(*(uint64_t*)0x200002c8 = 0x64);
    NONFAILING(*(uint64_t*)0x20000318 = 1);
    NONFAILING(*(uint64_t*)0x20000320 = 0);
    NONFAILING(*(uint64_t*)0x20000328 = 0);
    NONFAILING(*(uint32_t*)0x20000330 = 0);
    syscall(__NR_sendmsg, -1, 0x20000300ul, 0x4048090ul);
    {
      int i;
      for (i = 0; i < 32; i++) {
        syscall(__NR_sendmsg, -1, 0x20000300ul, 0x4048090ul);
      }
    }
    break;
  case 13:
    NONFAILING(memcpy((void*)0x20000040, "./file0\000", 8));
    syscall(__NR_creat, 0x20000040ul, 0x140ul);
    break;
  case 14:
    NONFAILING(*(uint64_t*)0x20000180 = 0x20000080);
    NONFAILING(*(uint16_t*)0x20000080 = 0x10);
    NONFAILING(*(uint16_t*)0x20000082 = 0);
    NONFAILING(*(uint32_t*)0x20000084 = 0);
    NONFAILING(*(uint32_t*)0x20000088 = 0x3002);
    NONFAILING(*(uint32_t*)0x20000188 = 0xc);
    NONFAILING(*(uint64_t*)0x20000190 = 0x20000100);
    NONFAILING(*(uint64_t*)0x20000100 = 0x200000c0);
    NONFAILING(*(uint32_t*)0x200000c0 = 0x1c);
    NONFAILING(*(uint16_t*)0x200000c4 = 0x140f);
    NONFAILING(*(uint16_t*)0x200000c6 = 0x800);
    NONFAILING(*(uint32_t*)0x200000c8 = 0);
    NONFAILING(*(uint32_t*)0x200000cc = 0x25dfdbfb);
    NONFAILING(*(uint16_t*)0x200000d0 = 0xb);
    NONFAILING(*(uint16_t*)0x200000d2 = 0x45);
    NONFAILING(memcpy((void*)0x200000d4, "uverbs\000", 7));
    NONFAILING(*(uint64_t*)0x20000108 = 0x1c);
    NONFAILING(*(uint64_t*)0x20000198 = 1);
    NONFAILING(*(uint64_t*)0x200001a0 = 0);
    NONFAILING(*(uint64_t*)0x200001a8 = 0);
    NONFAILING(*(uint32_t*)0x200001b0 = 0x8000);
    syscall(__NR_sendmsg, -1, 0x20000180ul, 0x44800ul);
    break;
  case 15:
    NONFAILING(*(uint64_t*)0x20000140 = 0);
    NONFAILING(*(uint32_t*)0x20000148 = 0);
    NONFAILING(*(uint64_t*)0x20000150 = 0x200001c0);
    NONFAILING(*(uint64_t*)0x200001c0 = 0x20000000);
    NONFAILING(memcpy((void*)0x20000000,
                      "\x40\x00\x00\x00\x10\x00\x01\x04\x00\x00\x00\x00\x00\xdd"
                      "\x00\x00\x00\x00\x00\x00",
                      20));
    NONFAILING(*(uint32_t*)0x20000014 = 0);
    NONFAILING(*(uint64_t*)0x200001c8 = 0x40);
    NONFAILING(*(uint64_t*)0x20000158 = 1);
    NONFAILING(*(uint64_t*)0x20000160 = 0);
    NONFAILING(*(uint64_t*)0x20000168 = 0);
    NONFAILING(*(uint32_t*)0x20000170 = 0);
    syscall(__NR_sendmsg, r[0], 0x20000140ul, 0ul);
    break;
  case 16:
    NONFAILING(*(uint32_t*)0x20000840 = 4);
    NONFAILING(*(uint32_t*)0x20000844 = 0x80);
    NONFAILING(*(uint8_t*)0x20000848 = 0x61);
    NONFAILING(*(uint8_t*)0x20000849 = 0);
    NONFAILING(*(uint8_t*)0x2000084a = 7);
    NONFAILING(*(uint8_t*)0x2000084b = 8);
    NONFAILING(*(uint32_t*)0x2000084c = 0);
    NONFAILING(*(uint64_t*)0x20000850 = 0x16);
    NONFAILING(*(uint64_t*)0x20000858 = 0x10000);
    NONFAILING(*(uint64_t*)0x20000860 = 1);
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000868, 0, 0, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000868, 1, 1, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000868, 0, 2, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000868, 0, 3, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000868, 1, 4, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000868, 1, 5, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000868, 1, 6, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000868, 1, 7, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000868, 1, 8, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000868, 0, 9, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000868, 0, 10, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000868, 1, 11, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000868, 1, 12, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000868, 0, 13, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000868, 1, 14, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000868, 1, 15, 2));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000868, 0, 17, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000868, 1, 18, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000868, 1, 19, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000868, 0, 20, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000868, 1, 21, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000868, 1, 22, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000868, 0, 23, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000868, 1, 24, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000868, 1, 25, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000868, 1, 26, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000868, 1, 27, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000868, 1, 28, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000868, 1, 29, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000868, 1, 30, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000868, 0, 31, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000868, 0, 32, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000868, 1, 33, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000868, 1, 34, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000868, 0, 35, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000868, 1, 36, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000868, 1, 37, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, , 0x20000868, 0, 38, 26));
    NONFAILING(*(uint32_t*)0x20000870 = 9);
    NONFAILING(*(uint32_t*)0x20000874 = 1);
    NONFAILING(*(uint64_t*)0x20000878 = 0x20000400);
    NONFAILING(*(uint64_t*)0x20000880 = 8);
    NONFAILING(*(uint64_t*)0x20000888 = 0x12420);
    NONFAILING(*(uint64_t*)0x20000890 = 0x80);
    NONFAILING(*(uint32_t*)0x20000898 = 4);
    NONFAILING(*(uint32_t*)0x2000089c = 3);
    NONFAILING(*(uint64_t*)0x200008a0 = 5);
    NONFAILING(*(uint32_t*)0x200008a8 = 0);
    NONFAILING(*(uint16_t*)0x200008ac = 7);
    NONFAILING(*(uint16_t*)0x200008ae = 0);
    NONFAILING(*(uint32_t*)0x200008b0 = 2);
    NONFAILING(*(uint32_t*)0x200008b4 = 0);
    NONFAILING(*(uint64_t*)0x200008b8 = 0x6f555eb7);
    syscall(__NR_perf_event_open, 0x20000840ul, -1, 0xeul, r[3], 8ul);
    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_sysctl();
  setup_cgroups();
  setup_binfmt_misc();
  setup_802154();
  install_segv_handler();
  for (procid = 0; procid < 6; procid++) {
    if (fork() == 0) {
      use_temporary_dir();
      do_sandbox_none();
    }
  }
  sleep(1000000);
  return 0;
}