// https://syzkaller.appspot.com/bug?id=b934188668db347cbcbaa3e11d4e47b65a013c30
// 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 <sched.h>
#include <signal.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/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/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/rtnetlink.h>
#include <linux/tcp.h>
#include <linux/veth.h>

#ifndef __NR_bind
#define __NR_bind 200
#endif
#ifndef __NR_ioctl
#define __NR_ioctl 29
#endif
#ifndef __NR_mmap
#define __NR_mmap 222
#endif
#ifndef __NR_sendmsg
#define __NR_sendmsg 211
#endif
#ifndef __NR_socket
#define __NR_socket 198
#endif

static unsigned long long procid;

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

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

#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))))

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, bool up)
{
  struct ifinfomsg hdr;
  memset(&hdr, 0, sizeof(hdr));
  if (up)
    hdr.ifi_flags = hdr.ifi_change = IFF_UP;
  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, false);
  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, false);
  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_xfrm(struct nlmsg* nlmsg, int sock, const char* name)
{
  netlink_add_device_impl(nlmsg, "xfrm", name, true);
  netlink_nest(nlmsg, IFLA_INFO_DATA);
  int if_id = 1;
  netlink_attr(nlmsg, 2, &if_id, sizeof(if_id));
  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, false);
  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, false);
  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, false);
  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, false);
  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, false);
  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, false);
  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 struct nlmsg nlmsg;

#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 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)
{
  write_file("/sys/bus/netdevsim/del_device", "%u", addr);
  if (write_file("/sys/bus/netdevsim/new_device", "%u %u", addr, port_count)) {
    char buf[32];
    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"},         {"veth", 0},           {"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_add_xfrm(&nlmsg, sock, "xfrm0");
  netlink_device_change(&nlmsg, sock, "bridge_slave_0", true, 0, 0, 0, NULL);
  netlink_device_change(&nlmsg, sock, "bridge_slave_1", true, 0, 0, 0, NULL);
  netlink_add_veth(&nlmsg, sock, "hsr_slave_0", "veth0_to_hsr");
  netlink_add_veth(&nlmsg, sock, "hsr_slave_1", "veth1_to_hsr");
  netlink_add_hsr(&nlmsg, sock, "hsr0", "hsr_slave_0", "hsr_slave_1");
  netlink_device_change(&nlmsg, sock, "hsr_slave_0", true, 0, 0, 0, NULL);
  netlink_device_change(&nlmsg, sock, "hsr_slave_1", true, 0, 0, 0, NULL);
  netlink_add_veth(&nlmsg, sock, "veth0_virt_wifi", "veth1_virt_wifi");
  netlink_add_linked(&nlmsg, sock, "virt_wifi", "virt_wifi0",
                     "veth1_virt_wifi");
  netlink_add_veth(&nlmsg, sock, "veth0_vlan", "veth1_vlan");
  netlink_add_vlan(&nlmsg, sock, "vlan0", "veth0_vlan", 0, htons(ETH_P_8021Q));
  netlink_add_vlan(&nlmsg, sock, "vlan1", "veth0_vlan", 1, htons(ETH_P_8021AD));
  netlink_add_macvlan(&nlmsg, sock, "macvlan0", "veth1_vlan");
  netlink_add_macvlan(&nlmsg, sock, "macvlan1", "veth1_vlan");
  netlink_add_ipvlan(&nlmsg, sock, "ipvlan0", "veth0_vlan", IPVLAN_MODE_L2, 0);
  netlink_add_ipvlan(&nlmsg, sock, "ipvlan1", "veth0_vlan", IPVLAN_MODE_L3S,
                     IPVLAN_F_VEPA);
  netlink_add_veth(&nlmsg, sock, "veth0_macvtap", "veth1_macvtap");
  netlink_add_linked(&nlmsg, sock, "macvtap", "macvtap0", "veth0_macvtap");
  netlink_add_linked(&nlmsg, sock, "macsec", "macsec0", "veth1_macvtap");
  char addr[32];
  sprintf(addr, DEV_IPV4, 14 + 10);
  struct in_addr geneve_addr4;
  if (inet_pton(AF_INET, addr, &geneve_addr4) <= 0)
    exit(1);
  struct in6_addr geneve_addr6;
  if (inet_pton(AF_INET6, "fc00::01", &geneve_addr6) <= 0)
    exit(1);
  netlink_add_geneve(&nlmsg, sock, "geneve0", 0, &geneve_addr4, 0);
  netlink_add_geneve(&nlmsg, sock, "geneve1", 1, 0, &geneve_addr6);
  netdevsim_add((int)procid, 4);
  netlink_wireguard_setup();
  for (i = 0; i < sizeof(devices) / (sizeof(devices[0])); i++) {
    char addr[32];
    sprintf(addr, DEV_IPV4, i + 10);
    netlink_add_addr4(&nlmsg, sock, devices[i].name, addr);
    if (!devices[i].noipv6) {
      sprintf(addr, DEV_IPV6, i + 10);
      netlink_add_addr6(&nlmsg, sock, devices[i].name, addr);
    }
    uint64_t macaddr = DEV_MAC + ((i + 10ull) << 40);
    netlink_device_change(&nlmsg, sock, devices[i].name, true, 0, &macaddr,
                          devices[i].macsize, NULL);
  }
  close(sock);
}
static void initialize_netdevices_init(void)
{
  int sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
  if (sock == -1)
    exit(1);
  struct {
    const char* type;
    int macsize;
    bool noipv6;
    bool noup;
  } devtypes[] = {
      {"nr", 7, true},
      {"rose", 5, true, true},
  };
  unsigned i;
  for (i = 0; i < sizeof(devtypes) / sizeof(devtypes[0]); i++) {
    char dev[32], addr[32];
    sprintf(dev, "%s%d", devtypes[i].type, (int)procid);
    sprintf(addr, "172.30.%d.%d", i, (int)procid + 1);
    netlink_add_addr4(&nlmsg, sock, dev, addr);
    if (!devtypes[i].noipv6) {
      sprintf(addr, "fe88::%02x:%02x", i, (int)procid + 1);
      netlink_add_addr6(&nlmsg, sock, dev, addr);
    }
    int macsize = devtypes[i].macsize;
    uint64_t macaddr = 0xbbbbbb +
                       ((unsigned long long)i << (8 * (macsize - 2))) +
                       (procid << (8 * (macsize - 1)));
    netlink_device_change(&nlmsg, sock, dev, !devtypes[i].noup, 0, &macaddr,
                          macsize, NULL);
  }
  close(sock);
}

#define MAX_FDS 30

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

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

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

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

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

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

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

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

static void execute_one(void);

#define WAIT_FLAGS __WALL

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

uint64_t r[6] = {0xffffffffffffffff,
                 0xffffffffffffffff,
                 0xffffffffffffffff,
                 0xffffffffffffffff,
                 0x0,
                 0xffffffffffffffff};

void execute_one(void)
{
  intptr_t res = 0;
  res = syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/0);
  if (res != -1)
    r[0] = res;
  memcpy((void*)0x20000300, "vxcan1\000\000\000\000\000\000\000\000\000\000",
         16);
  res = syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0x8933, /*arg=*/0x20000300ul);
  if (res != -1)
    r[1] = *(uint32_t*)0x20000310;
  *(uint64_t*)0x200002c0 = 0;
  *(uint32_t*)0x200002c8 = 0;
  *(uint64_t*)0x200002d0 = 0x20000000;
  *(uint64_t*)0x20000000 = 0x20000080;
  memcpy((void*)0x20000080,
         "\x20\x00\x00\x00\x10\x00\x01\x24\x00\x04\x00\xf5\xff\xff\xff\xff\xff"
         "\xff\xff\x00",
         20);
  *(uint32_t*)0x20000094 = r[1];
  memset((void*)0x20000098, 97, 1);
  *(uint64_t*)0x20000008 = 0x20;
  *(uint64_t*)0x200002d8 = 1;
  *(uint64_t*)0x200002e0 = 0;
  *(uint64_t*)0x200002e8 = 0;
  *(uint32_t*)0x200002f0 = 0;
  syscall(__NR_sendmsg, /*fd=*/r[0], /*msg=*/0x200002c0ul, /*f=*/0ul);
  res = syscall(__NR_socket, /*domain=*/0x1dul, /*type=*/2ul, /*proto=*/7);
  if (res != -1)
    r[2] = res;
  res = syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/0x10);
  if (res != -1)
    r[3] = res;
  memcpy((void*)0x20000300, "vxcan1\000\000\000\000\000\000\000\000\000\000",
         16);
  res = syscall(__NR_ioctl, /*fd=*/r[3], /*cmd=*/0x8933, /*arg=*/0x20000300ul);
  if (res != -1)
    r[4] = *(uint32_t*)0x20000310;
  *(uint16_t*)0x20000e40 = 0x1d;
  *(uint32_t*)0x20000e44 = r[4];
  *(uint64_t*)0x20000e48 = 0;
  *(uint8_t*)0x20000e50 = 0;
  *(uint8_t*)0x20000e51 = 0;
  *(uint8_t*)0x20000e52 = 0;
  *(uint8_t*)0x20000e53 = 0;
  *(uint8_t*)0x20000e54 = 0;
  syscall(__NR_bind, /*fd=*/r[2], /*addr=*/0x20000e40ul, /*len=*/0x18ul);
  *(uint64_t*)0x200001c0 = 0x20000140;
  *(uint16_t*)0x20000140 = 0x1d;
  *(uint32_t*)0x20000144 = 0;
  *(uint64_t*)0x20000148 = 0;
  *(uint8_t*)0x20000150 = 0;
  *(uint8_t*)0x20000151 = 0;
  *(uint8_t*)0x20000152 = 0;
  *(uint8_t*)0x20000153 = 0;
  *(uint8_t*)0x20000154 = 0;
  *(uint32_t*)0x200001c8 = 0x18;
  *(uint64_t*)0x200001d0 = 0x20000180;
  *(uint64_t*)0x20000180 = 0x20000e80;
  memcpy(
      (void*)0x20000e80,
      "\xdc\xbe\x37\xf1\xfd\x95\x9e\x67\x49\x2e\x16\x96\xe8\x02\x2d\x1d\x33\x30"
      "\x83\xdc\xcc\xaf\xc1\x24\x7e\x16\xfc\x23\x4c\xf9\xbf\x2e\xd5\x1a\x71\x96"
      "\x9b\xb9\xa5\x89\xed\xbd\x35\xc1\x34\x46\xc8\x1d\x08\x2f\x85\xea\xe8\x62"
      "\xf0\xd2\xe0\x19\xdc\x59\xbb\xd0\x8c\xef\x1b\x72\xdb\x08\xa3\x55\xdf\x97"
      "\x8a\x8f\x77\x24\xb1\x14\x93\xa2\x5d\x99\x1e\x2c\x50\xd1\x8d\x73\x58\xd7"
      "\x41\x0b\x29\x12\x06\xd3\xf5\xd8\x5a\x83\xd6\x0c\x4e\x6f\xf2\x4b\xf5\x83"
      "\xaa\x2a\xe1\x73\x8a\x68\x20\xd5\x06\xed\x3d\x6a\xcb\xa5\xb3\xf7\xfc\xc0"
      "\x8f\x14\x7d\xef\xda\x9e\xa1\xba\x58\x01\x16\xb8\x54\x73\x99\x34\x71\x41"
      "\x3a\xbc\x0a\x00\x46\xda\xe6\x99\x0f\x85\x50\x0c\x36\xe8\xe3\x71\x9f\x67"
      "\xe2\x59\x0a\xb9\x7f\xbe\x58\xc5\xca\xed\xa5\xca\xf2\xc4\xee\x2f\xa7\x0a"
      "\xaf\xb7\xbb\x90\x41\x3b\x81\x95\xfa\xb3\x30\xd9\x19\x11\xde\xbd\x8e\x58"
      "\x00\x76\xd0\x45\xe4\xfc\x6e\x5a\xb6\x7d\x02\x48\xee\x61\x79\x18\x0b\x89"
      "\xd3\x20\xd1\x71\x53\x1c\xaf\x7d\x9d\x05\xda\x81\x70\x53\xcc\xc5\x06\xb8"
      "\x03\x94\xb1\x0c\x65\x37\xb3\x1e\xcd\x52\x90\xc1\xcf\x39\x78\xc3\x43\xe2"
      "\xed\xfc\xa0\xf9\xb4\xe8\xe4\x78\x40\x52\x54\x66\xfb\x7d\x72\xbd\x06\xea"
      "\xa0\xa1\x86\x95\xe5\xd6\xde\x00\x82\x43\xca\xcc\x61\x64\x03\xfd\x59\x46"
      "\x71\x09\xf7\x5e\x50\x79\x6f\xa3\x0e\x82\x0a\x2a\xb0\x28\xae\xb0\x32\xe7"
      "\x52\x01\x7a\x16\x36\x99\x00\xd8\xbe\x8f\x1e\x12\x06\x04\x9f\xd3\xec\x20"
      "\xd6\x8e\x23\x0b\xf0\x9b\x1e\x42\xf0\x26\x04\xa7\x94\x6a\x66\xbc\x29\xbd"
      "\x9d\xc8\xc5\x0b\x4f\x04\x65\x6d\x49\x95\x82\xa7\x56\x25\xb6\x55\x2e\xe7"
      "\xcf\xf7\xc7\xc8\x28\xbd\x92\x65\xaf\x33\x10\xd2\xcb\x75\x9b\x3e\xd0\xe1"
      "\x26\xab\xbc\x3c\x26\xbf\x62\x74\xa1\x31\x40\x2c\x7b\x40\xe7\xe5\xf6\x99"
      "\xd6\x4a\x4c\x53\x5f\x4a\x88\xd0\x5e\x4e\x76\x60\x9c\x1b\xb5\x4e\xa7\xfc"
      "\x1a\xa9\xe2\x04\x72\x8c\xb0\x52\xc7\x6e\xa9\x82\x72\x8a\x1f\xd3\xf7\xff"
      "\x14\x01\xf7\x94\x25\x0a\x15\x2b\xe7\xb6\xf0\xde\x5d\x91\x86\xc0\xbd\x8a"
      "\xe3\x40\x35\x5d\x14\x4f\x07\x46\x69\xd0\xce\x52\x29\xde\x6c\xfd\xff\xac"
      "\xe3\x58\x97\x05\x45\xe4\x2e\xfa\x83\xbc\x5e\x2c\x0c\x04\xfd\xcd\xa3\xed"
      "\xf4\xc3\x5b\x94\x93\x2f\x53\xd4\xf5\x42\xf6\xef\xb5\x69\x51\x2b\xca\xf9"
      "\xc5\x54\x54\x05\x2f\xd9\xd8\x4e\x73\x13\x6b\x28\xfe\xd2\x34\x9f\x24\x5e"
      "\x47\x71\x19\xad\x2d\x46\x10\x03\x2d\x2e\x09\x9e\x13\x28\x10\x78\x18\xd9"
      "\xb5\xea\x05\xbd\x58\x56\x4d\x44\x5e\x34\xcf\xd0\x38\xa5\xe0\x84\xfb\x9a"
      "\x15\xdf\x49\xd0\xa2\x78\x3a\x40\xde\x43\x62\x77\x43\x1e\xb5\x3f\xdb\x3a"
      "\x3f\x0b\x13\x32\xec\x03\x55\x99\xb6\x5b\x94\x83\xaf\xd1\x38\x6d\x4b\x76"
      "\x5d\xdf\x11\xdd\x51\x5a\xdd\xe8\x81\xcc\xe0\x0b\x13\xe0\x65\xcc\x5c\x64"
      "\x52\xc7\x25\xe7\xf7\xdb\xa2\x38\x07\x93\x8b\x7d\xc6\x05\x84\x23\xd5\x77"
      "\x7a\xad\xfe\xcb\x1a\x13\xc1\xe7\xeb\x68\x80\x21\xc9\xab\x8c\x70\xfe\x88"
      "\xfc\x06\xa3\x5a\xf2\x84\x5a\x2f\xef\xe7\x5e\x8a\x93\x31\xff\x5c\x5a\xc3"
      "\x3e\xb1\x69\x63\x3a\x67\xc6\x3a\x52\x2b\x25\x3d\xe5\x00\xf0\x14\x3f\x66"
      "\x63\x3a\x9e\x77\x42\x00\x31\xc3\x5d\x3e\xc6\x1f\x46\xea\x8d\x9b\x9d\x25"
      "\xa7\xec\xd7\x6e\x85\xce\xa0\x74\x79\x08\x77\xdc\x39\x9b\x09\x3f\x04\x10"
      "\x29\xde\x5f\xea\x2d\x72\xc7\xdf\xf4\xba\x3e\x66\x90\x5d\x66\xa7\xcd\x46"
      "\x9b\xa0\x66\x3b\x5a\xad\xbe\x9a\x58\xc7\x2f\xf5\xfd\x98\xe9\x16\x05\x44"
      "\xa8\x8a\x86\x03\x49\xac\xa0\xc9\x17\x37\x46\x95\xaa\xd9\x48\xc0\x22\xd1"
      "\xe9\x22\xbf\x90\x42\xf9\xcf\x21\x9d\xc6\x7d\x1a\x1d\x1b\xdf\xb9\x62\x75"
      "\xda\xa6\xf4\x41\x25\x49\x86\x46\x57\xef\xc1\xbb\x87\x0a\x15\xe4\x6d\xf5"
      "\x75\x87\x33\x6b\x67\x08\x05\x46\xb8\xc6\x5d\x69\xbe\xa3\xf1\x0a\x16\x33"
      "\xa0\xab\x18\xb3\xe4\x24\x52\x12\xcc\x06\x05\xe5\xfb\x66\x0b\xf4\x2b\x1b"
      "\x76\x8e\x59\x0c\x5e\xa4\xf4\xbc\x3d\xce\x5c\xfa\x3d\x82\x7f\x4f\xca\xed"
      "\x55\x2f\xee\x9d\x32\x66\x44\x4d\xd7\x50\xa6\x87\xb6\x80\xac\x99\x76\x4a"
      "\xa2\x3a\x64\xd4\x0a\xef\xb3\x59\x40\xa6\x36\x61\xd9\xfd\x86\xbe\x63\xd4"
      "\x9c\x44\x1a\x88\x30\x09\xf5\xca\x3c\x6f\x98\x1e\x50\xd3\x22\x44\xc1\xc3"
      "\x0a\xff\x61\xba\x96\xc2\x6c\xf8\x89\xf9\x02\xdb\x08\x35\x18\xb6\x3c\xef"
      "\xf8\x78\x06\x2f\xd7\x6d\x0a\xcf\xd2\x2d\xf6\x7b\xe9\xc2\x06\xab\x0c\x3f"
      "\x19\xa4\xd4\xad\xd0\x21\x1f\x99\x26\xe7\x19\x8c\x26\x96\x17\x0d\xb2\xb6"
      "\x59\x30\x8b\x57\x20\xe7\x41\x50\x43\x3c\xb2\x4a\xe9\x9e\x88\xf5\xd7\x2f"
      "\xfe\x66\x84\xcb\x0f\xa0\x16\xa9\xb3\xaf\xc4\xea\x54\x15\xb1\xdc\xb1\xc6"
      "\xf1\x56\x16\xfa\xee\xdd\x9c\xf6\xc9\x73\xe8\xff\xc4\x49\x9f\xe0\x9d\x5c"
      "\xa2\xb5\x97\x6f\xf8\x2f\x85\xbb\x37\xc0\x9d\x0e\x36\x5b\x96\xa1\x6d\x6e"
      "\xca\x37\xfc\xd1\xd9\xaf\x6f\xa0\x8b\x55\xe2\x5b\x50\x61\x5a\x52\x78\xf4"
      "\x08\x69\xbc\x43\x76\xc2\x94\x4e\x28\xf2\x43\x56\x9b\xa4\x13\x1e\x0f\x5b"
      "\xc9\x9c\xef\xf8\x43\x92\x98\x74\x0c\x03\x13\x5b\xb3\x51\x2c\x1a\x37\x85"
      "\x39\x6a\x08\x96\xed\x0e\xa2\x9a\x8d\xa3\x3e\x96\x00\xcb\x39\x50\x6b\x3a"
      "\xce\x03\x69\xe9\xa1\xc4\x35\x5c\x76\x28\x5c\x62\x2c\xa3\x6b\x57\x2f\xac"
      "\x96\xdb\xf1\x83\x5e\xf8\x3c\x46\x8e\x55\xc5\xef\x2a\x5b\x71\xbc\x3e\x05"
      "\xf0\xc3\x8f\x00\x6f\x34\xa5\x43\x95\x93\xdd\x3c\x40\x4b\x40\x23\xcd\x28"
      "\x36\x9d\x15\x7a\x88\x7d\x00\x73\x28\xab\x09\x17\xa9\xd7\x2a\x64\x06\x0f"
      "\x48\x17\x5c\xc0\x5a\xf6\x3d\x45\x93\xa5\x65\xd4\x70\x5f\xbb\x19\x13\x6a"
      "\x11\x1a\xd7\x79\x45\xe6\x3a\xea\x4e\x6f\x9b\x2e\x91\x48\x42\x0e\xaa\xfe"
      "\x87\xaf\x78\x20\x38\x5f\x2a\x96\x26\xa4\xbc\xfb\x5e\x93\x39\x25\x61\x31"
      "\x21\x73\x9e\x44\x98\x0b\x78\xea\x93\xce\xc0\x41\xc4\xae\x50\x8d\xf9\x7a"
      "\x7a\x31\x5e\xee\x4d\xe3\x56\xa2\xd1\x15\x06\x0d\x73\x02\x9b\xbe\x78\xeb"
      "\x44\x78\x00\x43\x81\x3c\x37\xd4\xde\x8c\x0b\x08\xda\x4c\x3a\x63\xc1\xe1"
      "\xe1\xce\x1f\x00\xf4\x5d\x8f\x3f\x1a\x13\x57\xd4\xe5\x45\xfb\x0d\xc9\x1b"
      "\x70\x0e\xe2\x44\x40\x74\xae\x12\x4a\x78\xdf\x8f\x66\x0c\x39\xb0\x4b\x88"
      "\xc4\x40\xd3\xfc\x24\xfb\xa9\x07\x20\xfb\xf6\xf6\x39\xdf\xf6\x02\xe0\x6d"
      "\xcc\xcd\xf5\x21\x64\x1e\xee\x41\x2a\x82\x8b\x11\x47\xbc\xe6\x3a\x54\x76"
      "\xc6\xd8\x4f\x51\xa1\x4f\x2b\x97\xe8\xea\x5a\xb0\x74\x28\xb8\xbf\x5b\x7c"
      "\x4a\x3b\x5c\x6b\xca\xe7\x03\xbe\xdf\x15\x16\xd9\x9e\x36\x08\x21\xe5\x90"
      "\xa0\xb5\xf3\xed\xcb\xb2\x3f\xe5\x02\x51\x2a\xfc\x4a\x3b\x77\x5e\xc7\xd9"
      "\xc4\x43\x4b\xa8\x89\xec\x6a\x2e\xd7\x96\x4d\xab\xc7\x7e\xe7\x58\xff\x25"
      "\x48\x20\x3b\x02\xa4\x1a\x60\x84\xe3\x0c\x68\x53\xc6\x80\xa6\x02\xe4\x89"
      "\x08\xfa\xcc\x86\xe6\xb9\xba\x97\x78\xbd\x95\x5e\x93\xbb\x03\x5e\xfd\xed"
      "\x7f\x58\xb7\xe8\x6b\x7d\x01\xfb\x67\xe7\x84\xc4\xba\x3e\x69\xf6\x1d\x4d"
      "\xfe\x5d\x57\xc7\x55\xae\x81\x12\x5d\xb1\x54\x8a\x78\x59\x40\x79\x1b\x6a"
      "\x2f\x57\xfc\x5d\xe2\x36\x63\xe9\xdf\x9b\x2e\x55\x91\xca\x40\x26\x68\xe7"
      "\x4f\x66\x73\x03\x2b\x60\xc9\x56\x18\x6e\x59\x0e\x05\xfe\x86\x79\x32\x73"
      "\x2b\x83\xbb\x16\xa5\xf7\xbf\x6b\xff\x3e\x7f\xea\xcc\x24\xad\xae\xfa\x0a"
      "\x84\xe0\x7b\x07\xb6\x38\x8c\x1a\xf3\xa6\x4c\xcc\xca\xb0\x05\x70\x9d\x1b"
      "\xf5\x0b\x6b\xb3\x4a\x94\x8e\x2a\x12\x37\x08\x21\xa7\xde\xf6\xea\xd8\x49"
      "\x50\x62\x32\x78\xef\x98\xe7\x79\x10\x5a\xe4\xd2\xc1\xe7\x4c\x4f\xd9\xe5"
      "\xe0\x7d\x64\x95\x41\xde\x21\x28\x68\x8d\x21\xc8\xde\x2d\xc7\xde\x2b\xde"
      "\x69\xda\x32\xfe\x98\xec\x60\xd7\xaa\xc2\x39\x56\x58\x24\xe8\x71\xf9\x91"
      "\x6f\xca\x1c\xd5\x91\x3f\xc7\x1b\x48\x5e\x11\x58\x09\x1f\x42\x5b\x7a\x7f"
      "\xe3\x79\xdf\xc9\xa8\x37\x44\x67\x57\x53\x04\x12\xac\xf4\x98\x3a\x33\xba"
      "\xf0\x5f\x4e\xd0\x47\x5f\x04\x3d\x3d\x97\x48\x0f\x1b\x87\x15\xcf\x14\xd5"
      "\x67\xa1\xbf\xd6\xc3\x79\x98\xa4\xe6\x9a\xd5\x4f\x47\x36\x57\x30\x69\x47"
      "\xc7\x19\xe5\x7e\x23\x28\xe8\x13\x5d\x25\xee\xa7\x6a\x2b\x3a\x84\x3e\x62"
      "\x57\x39\x33\x0e\xad\x7d\xd8\x96\xd9\x73\xb8\xa5\xec\x74\x87\x49\x3e\xd8"
      "\x2a\xc2\x91\x94\xf1\x35\x04\x96\xfa\xc2\x35\x2b\xda\x8b\x28\x8d\xd4\xc8"
      "\xf7\x1c\xde\x57",
      1786);
  *(uint64_t*)0x20000188 = 0x6fa;
  *(uint64_t*)0x200001d8 = 1;
  *(uint64_t*)0x200001e0 = 0;
  *(uint64_t*)0x200001e8 = 0;
  *(uint32_t*)0x200001f0 = 0;
  syscall(__NR_sendmsg, /*fd=*/r[2], /*msg=*/0x200001c0ul, /*f=*/0ul);
  *(uint64_t*)0x20000480 = 0x20000280;
  *(uint16_t*)0x20000280 = 0x1d;
  *(uint32_t*)0x20000284 = 0;
  *(uint64_t*)0x20000288 = 0;
  *(uint8_t*)0x20000290 = 0;
  *(uint8_t*)0x20000291 = 0;
  *(uint8_t*)0x20000292 = 0;
  *(uint8_t*)0x20000293 = 0;
  *(uint8_t*)0x20000294 = 0;
  *(uint32_t*)0x20000488 = 0x18;
  *(uint64_t*)0x20000490 = 0x20000440;
  *(uint64_t*)0x20000440 = 0x20000340;
  memset((void*)0x20000340, 0, 1);
  *(uint64_t*)0x20000448 = 1;
  *(uint64_t*)0x20000498 = 1;
  *(uint64_t*)0x200004a0 = 0;
  *(uint64_t*)0x200004a8 = 0;
  *(uint32_t*)0x200004b0 = 0;
  syscall(__NR_sendmsg, /*fd=*/r[2], /*msg=*/0x20000480ul, /*f=*/0ul);
  res = syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/0);
  if (res != -1)
    r[5] = res;
  *(uint64_t*)0x20006440 = 0;
  *(uint32_t*)0x20006448 = 0;
  *(uint64_t*)0x20006450 = 0x200063c0;
  *(uint64_t*)0x200063c0 = 0x20000600;
  *(uint32_t*)0x20000600 = 0x34;
  *(uint16_t*)0x20000604 = 0x10;
  *(uint16_t*)0x20000606 = 1;
  *(uint32_t*)0x20000608 = 0;
  *(uint32_t*)0x2000060c = 0;
  *(uint16_t*)0x20000610 = 8;
  STORE_BY_BITMASK(uint16_t, , 0x20000612, 0, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x20000613, 0, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x20000613, 0, 7, 1);
  *(uint32_t*)0x20000614 = 0;
  *(uint16_t*)0x20000618 = 8;
  STORE_BY_BITMASK(uint16_t, , 0x2000061a, 0, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x2000061b, 0, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x2000061b, 0, 7, 1);
  *(uint32_t*)0x2000061c = 0;
  *(uint16_t*)0x20000620 = 0x14;
  STORE_BY_BITMASK(uint16_t, , 0x20000622, 0x1b, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x20000623, 0, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x20000623, 0, 7, 1);
  *(uint64_t*)0x20000624 = htobe64(0x21);
  *(uint64_t*)0x2000062c = htobe64(1);
  *(uint64_t*)0x200063c8 = 0x34;
  *(uint64_t*)0x20006458 = 1;
  *(uint64_t*)0x20006460 = 0;
  *(uint64_t*)0x20006468 = 0;
  *(uint32_t*)0x20006470 = 0;
  syscall(__NR_sendmsg, /*fd=*/r[5], /*msg=*/0x20006440ul, /*f=*/0ul);
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=*/0x32ul, /*fd=*/-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0x1000000ul, /*prot=*/7ul,
          /*flags=*/0x32ul, /*fd=*/-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x21000000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=*/0x32ul, /*fd=*/-1, /*offset=*/0ul);
  do_sandbox_none();
  return 0;
}