// https://syzkaller.appspot.com/bug?id=762e7debe9358b9fb086b72671bc0b97bc686a88
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <arpa/inet.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 <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/mman.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/loop.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_memfd_create
#define __NR_memfd_create 319
#endif

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);
}

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, 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

//% This code is derived from puff.{c,h}, found in the zlib development. The
//% original files come with the following copyright notice:

//% Copyright (C) 2002-2013 Mark Adler, all rights reserved
//% version 2.3, 21 Jan 2013
//% This software is provided 'as-is', without any express or implied
//% warranty.  In no event will the author be held liable for any damages
//% arising from the use of this software.
//% Permission is granted to anyone to use this software for any purpose,
//% including commercial applications, and to alter it and redistribute it
//% freely, subject to the following restrictions:
//% 1. The origin of this software must not be misrepresented; you must not
//%    claim that you wrote the original software. If you use this software
//%    in a product, an acknowledgment in the product documentation would be
//%    appreciated but is not required.
//% 2. Altered source versions must be plainly marked as such, and must not be
//%    misrepresented as being the original software.
//% 3. This notice may not be removed or altered from any source distribution.
//% Mark Adler    madler@alumni.caltech.edu

//% BEGIN CODE DERIVED FROM puff.{c,h}

#define MAXBITS 15
#define MAXLCODES 286
#define MAXDCODES 30
#define MAXCODES (MAXLCODES + MAXDCODES)
#define FIXLCODES 288

struct puff_state {
  unsigned char* out;
  unsigned long outlen;
  unsigned long outcnt;
  const unsigned char* in;
  unsigned long inlen;
  unsigned long incnt;
  int bitbuf;
  int bitcnt;
  jmp_buf env;
};
static int puff_bits(struct puff_state* s, int need)
{
  long val = s->bitbuf;
  while (s->bitcnt < need) {
    if (s->incnt == s->inlen)
      longjmp(s->env, 1);
    val |= (long)(s->in[s->incnt++]) << s->bitcnt;
    s->bitcnt += 8;
  }
  s->bitbuf = (int)(val >> need);
  s->bitcnt -= need;
  return (int)(val & ((1L << need) - 1));
}
static int puff_stored(struct puff_state* s)
{
  s->bitbuf = 0;
  s->bitcnt = 0;
  if (s->incnt + 4 > s->inlen)
    return 2;
  unsigned len = s->in[s->incnt++];
  len |= s->in[s->incnt++] << 8;
  if (s->in[s->incnt++] != (~len & 0xff) ||
      s->in[s->incnt++] != ((~len >> 8) & 0xff))
    return -2;
  if (s->incnt + len > s->inlen)
    return 2;
  if (s->outcnt + len > s->outlen)
    return 1;
  for (; len--; s->outcnt++, s->incnt++) {
    if (s->in[s->incnt])
      s->out[s->outcnt] = s->in[s->incnt];
  }
  return 0;
}
struct puff_huffman {
  short* count;
  short* symbol;
};
static int puff_decode(struct puff_state* s, const struct puff_huffman* h)
{
  int first = 0;
  int index = 0;
  int bitbuf = s->bitbuf;
  int left = s->bitcnt;
  int code = first = index = 0;
  int len = 1;
  short* next = h->count + 1;
  while (1) {
    while (left--) {
      code |= bitbuf & 1;
      bitbuf >>= 1;
      int count = *next++;
      if (code - count < first) {
        s->bitbuf = bitbuf;
        s->bitcnt = (s->bitcnt - len) & 7;
        return h->symbol[index + (code - first)];
      }
      index += count;
      first += count;
      first <<= 1;
      code <<= 1;
      len++;
    }
    left = (MAXBITS + 1) - len;
    if (left == 0)
      break;
    if (s->incnt == s->inlen)
      longjmp(s->env, 1);
    bitbuf = s->in[s->incnt++];
    if (left > 8)
      left = 8;
  }
  return -10;
}
static int puff_construct(struct puff_huffman* h, const short* length, int n)
{
  int len;
  for (len = 0; len <= MAXBITS; len++)
    h->count[len] = 0;
  int symbol;
  for (symbol = 0; symbol < n; symbol++)
    (h->count[length[symbol]])++;
  if (h->count[0] == n)
    return 0;
  int left = 1;
  for (len = 1; len <= MAXBITS; len++) {
    left <<= 1;
    left -= h->count[len];
    if (left < 0)
      return left;
  }
  short offs[MAXBITS + 1];
  offs[1] = 0;
  for (len = 1; len < MAXBITS; len++)
    offs[len + 1] = offs[len] + h->count[len];
  for (symbol = 0; symbol < n; symbol++)
    if (length[symbol] != 0)
      h->symbol[offs[length[symbol]]++] = symbol;
  return left;
}
static int puff_codes(struct puff_state* s, const struct puff_huffman* lencode,
                      const struct puff_huffman* distcode)
{
  static const short lens[29] = {3,  4,  5,  6,   7,   8,   9,   10,  11, 13,
                                 15, 17, 19, 23,  27,  31,  35,  43,  51, 59,
                                 67, 83, 99, 115, 131, 163, 195, 227, 258};
  static const short lext[29] = {0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2,
                                 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 0};
  static const short dists[30] = {
      1,    2,    3,    4,    5,    7,    9,    13,    17,    25,
      33,   49,   65,   97,   129,  193,  257,  385,   513,   769,
      1025, 1537, 2049, 3073, 4097, 6145, 8193, 12289, 16385, 24577};
  static const short dext[30] = {0, 0, 0,  0,  1,  1,  2,  2,  3,  3,
                                 4, 4, 5,  5,  6,  6,  7,  7,  8,  8,
                                 9, 9, 10, 10, 11, 11, 12, 12, 13, 13};
  int symbol;
  do {
    symbol = puff_decode(s, lencode);
    if (symbol < 0)
      return symbol;
    if (symbol < 256) {
      if (s->outcnt == s->outlen)
        return 1;
      if (symbol)
        s->out[s->outcnt] = symbol;
      s->outcnt++;
    } else if (symbol > 256) {
      symbol -= 257;
      if (symbol >= 29)
        return -10;
      int len = lens[symbol] + puff_bits(s, lext[symbol]);
      symbol = puff_decode(s, distcode);
      if (symbol < 0)
        return symbol;
      unsigned dist = dists[symbol] + puff_bits(s, dext[symbol]);
      if (dist > s->outcnt)
        return -11;
      if (s->outcnt + len > s->outlen)
        return 1;
      while (len--) {
        if (dist <= s->outcnt && s->out[s->outcnt - dist])
          s->out[s->outcnt] = s->out[s->outcnt - dist];
        s->outcnt++;
      }
    }
  } while (symbol != 256);
  return 0;
}
static int puff_fixed(struct puff_state* s)
{
  static int virgin = 1;
  static short lencnt[MAXBITS + 1], lensym[FIXLCODES];
  static short distcnt[MAXBITS + 1], distsym[MAXDCODES];
  static struct puff_huffman lencode, distcode;
  if (virgin) {
    lencode.count = lencnt;
    lencode.symbol = lensym;
    distcode.count = distcnt;
    distcode.symbol = distsym;
    short lengths[FIXLCODES];
    int symbol;
    for (symbol = 0; symbol < 144; symbol++)
      lengths[symbol] = 8;
    for (; symbol < 256; symbol++)
      lengths[symbol] = 9;
    for (; symbol < 280; symbol++)
      lengths[symbol] = 7;
    for (; symbol < FIXLCODES; symbol++)
      lengths[symbol] = 8;
    puff_construct(&lencode, lengths, FIXLCODES);
    for (symbol = 0; symbol < MAXDCODES; symbol++)
      lengths[symbol] = 5;
    puff_construct(&distcode, lengths, MAXDCODES);
    virgin = 0;
  }
  return puff_codes(s, &lencode, &distcode);
}
static int puff_dynamic(struct puff_state* s)
{
  static const short order[19] = {16, 17, 18, 0, 8,  7, 9,  6, 10, 5,
                                  11, 4,  12, 3, 13, 2, 14, 1, 15};
  int nlen = puff_bits(s, 5) + 257;
  int ndist = puff_bits(s, 5) + 1;
  int ncode = puff_bits(s, 4) + 4;
  if (nlen > MAXLCODES || ndist > MAXDCODES)
    return -3;
  short lengths[MAXCODES];
  int index;
  for (index = 0; index < ncode; index++)
    lengths[order[index]] = puff_bits(s, 3);
  for (; index < 19; index++)
    lengths[order[index]] = 0;
  short lencnt[MAXBITS + 1], lensym[MAXLCODES];
  struct puff_huffman lencode = {lencnt, lensym};
  int err = puff_construct(&lencode, lengths, 19);
  if (err != 0)
    return -4;
  index = 0;
  while (index < nlen + ndist) {
    int symbol;
    int len;
    symbol = puff_decode(s, &lencode);
    if (symbol < 0)
      return symbol;
    if (symbol < 16)
      lengths[index++] = symbol;
    else {
      len = 0;
      if (symbol == 16) {
        if (index == 0)
          return -5;
        len = lengths[index - 1];
        symbol = 3 + puff_bits(s, 2);
      } else if (symbol == 17)
        symbol = 3 + puff_bits(s, 3);
      else
        symbol = 11 + puff_bits(s, 7);
      if (index + symbol > nlen + ndist)
        return -6;
      while (symbol--)
        lengths[index++] = len;
    }
  }
  if (lengths[256] == 0)
    return -9;
  err = puff_construct(&lencode, lengths, nlen);
  if (err && (err < 0 || nlen != lencode.count[0] + lencode.count[1]))
    return -7;
  short distcnt[MAXBITS + 1], distsym[MAXDCODES];
  struct puff_huffman distcode = {distcnt, distsym};
  err = puff_construct(&distcode, lengths + nlen, ndist);
  if (err && (err < 0 || ndist != distcode.count[0] + distcode.count[1]))
    return -8;
  return puff_codes(s, &lencode, &distcode);
}
static int puff(unsigned char* dest, unsigned long* destlen,
                const unsigned char* source, unsigned long sourcelen)
{
  struct puff_state s = {
      .out = dest,
      .outlen = *destlen,
      .outcnt = 0,
      .in = source,
      .inlen = sourcelen,
      .incnt = 0,
      .bitbuf = 0,
      .bitcnt = 0,
  };
  int err;
  if (setjmp(s.env) != 0)
    err = 2;
  else {
    int last;
    do {
      last = puff_bits(&s, 1);
      int type = puff_bits(&s, 2);
      err = type == 0 ? puff_stored(&s)
                      : (type == 1 ? puff_fixed(&s)
                                   : (type == 2 ? puff_dynamic(&s) : -1));
      if (err != 0)
        break;
    } while (!last);
  }
  *destlen = s.outcnt;
  return err;
}

//% END CODE DERIVED FROM puff.{c,h}

#define ZLIB_HEADER_WIDTH 2

static int puff_zlib_to_file(const unsigned char* source,
                             unsigned long sourcelen, int dest_fd)
{
  if (sourcelen < ZLIB_HEADER_WIDTH)
    return 0;
  source += ZLIB_HEADER_WIDTH;
  sourcelen -= ZLIB_HEADER_WIDTH;
  const unsigned long max_destlen = 132 << 20;
  void* ret = mmap(0, max_destlen, PROT_WRITE | PROT_READ,
                   MAP_PRIVATE | MAP_ANON, -1, 0);
  if (ret == MAP_FAILED)
    return -1;
  unsigned char* dest = (unsigned char*)ret;
  unsigned long destlen = max_destlen;
  int err = puff(dest, &destlen, source, sourcelen);
  if (err) {
    munmap(dest, max_destlen);
    errno = -err;
    return -1;
  }
  if (write(dest_fd, dest, destlen) != (ssize_t)destlen) {
    munmap(dest, max_destlen);
    return -1;
  }
  return munmap(dest, max_destlen);
}

static int setup_loop_device(unsigned char* data, unsigned long size,
                             const char* loopname, int* loopfd_p)
{
  int err = 0, loopfd = -1;
  int memfd = syscall(__NR_memfd_create, "syzkaller", 0);
  if (memfd == -1) {
    err = errno;
    goto error;
  }
  if (puff_zlib_to_file(data, size, memfd)) {
    err = errno;
    goto error_close_memfd;
  }
  loopfd = open(loopname, O_RDWR);
  if (loopfd == -1) {
    err = errno;
    goto error_close_memfd;
  }
  if (ioctl(loopfd, LOOP_SET_FD, memfd)) {
    if (errno != EBUSY) {
      err = errno;
      goto error_close_loop;
    }
    ioctl(loopfd, LOOP_CLR_FD, 0);
    usleep(1000);
    if (ioctl(loopfd, LOOP_SET_FD, memfd)) {
      err = errno;
      goto error_close_loop;
    }
  }
  close(memfd);
  *loopfd_p = loopfd;
  return 0;

error_close_loop:
  close(loopfd);
error_close_memfd:
  close(memfd);
error:
  errno = err;
  return -1;
}

static void reset_loop_device(const char* loopname)
{
  int loopfd = open(loopname, O_RDWR);
  if (loopfd == -1) {
    return;
  }
  if (ioctl(loopfd, LOOP_CLR_FD, 0)) {
  }
  close(loopfd);
}

static long syz_mount_image(volatile long fsarg, volatile long dir,
                            volatile long flags, volatile long optsarg,
                            volatile long change_dir,
                            volatile unsigned long size, volatile long image)
{
  unsigned char* data = (unsigned char*)image;
  int res = -1, err = 0, need_loop_device = !!size;
  char* mount_opts = (char*)optsarg;
  char* target = (char*)dir;
  char* fs = (char*)fsarg;
  char* source = NULL;
  char loopname[64];
  if (need_loop_device) {
    int loopfd;
    memset(loopname, 0, sizeof(loopname));
    snprintf(loopname, sizeof(loopname), "/dev/loop%llu", procid);
    if (setup_loop_device(data, size, loopname, &loopfd) == -1)
      return -1;
    close(loopfd);
    source = loopname;
  }
  mkdir(target, 0777);
  char opts[256];
  memset(opts, 0, sizeof(opts));
  if (strlen(mount_opts) > (sizeof(opts) - 32)) {
  }
  strncpy(opts, mount_opts, sizeof(opts) - 32);
  if (strcmp(fs, "iso9660") == 0) {
    flags |= MS_RDONLY;
  } else if (strncmp(fs, "ext", 3) == 0) {
    bool has_remount_ro = false;
    char* remount_ro_start = strstr(opts, "errors=remount-ro");
    if (remount_ro_start != NULL) {
      char after = *(remount_ro_start + strlen("errors=remount-ro"));
      char before = remount_ro_start == opts ? '\0' : *(remount_ro_start - 1);
      has_remount_ro = ((before == '\0' || before == ',') &&
                        (after == '\0' || after == ','));
    }
    if (strstr(opts, "errors=panic") || !has_remount_ro)
      strcat(opts, ",errors=continue");
  } else if (strcmp(fs, "xfs") == 0) {
    strcat(opts, ",nouuid");
  }
  res = mount(source, target, fs, flags, opts);
  if (res == -1) {
    err = errno;
    goto error_clear_loop;
  }
  res = open(target, O_RDONLY | O_DIRECTORY);
  if (res == -1) {
    err = errno;
    goto error_clear_loop;
  }
  if (change_dir) {
    res = chdir(target);
    if (res == -1) {
      err = errno;
    }
  }

error_clear_loop:
  if (need_loop_device)
    reset_loop_device(loopname);
  errno = err;
  return res;
}

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

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

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

static void loop();

static void sandbox_common()
{
  prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
  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);
  sandbox_common();
  drop_caps();
  initialize_netdevices_init();
  if (unshare(CLONE_NEWNET)) {
  }
  write_file("/proc/sys/net/ipv4/ping_group_range", "0 65535");
  initialize_netdevices();
  sandbox_common_mount_tmpfs();
  loop();
  exit(1);
}

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

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 loop(void)
{
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  int i, call, thread;
  for (call = 0; call < 9; call++) {
    for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0]));
         thread++) {
      struct thread_t* th = &threads[thread];
      if (!th->created) {
        th->created = 1;
        event_init(&th->ready);
        event_init(&th->done);
        event_set(&th->done);
        thread_start(thr, th);
      }
      if (!event_isset(&th->done))
        continue;
      event_reset(&th->done);
      th->call = call;
      __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED);
      event_set(&th->ready);
      event_timedwait(&th->done, 50 + (call == 0 ? 4000 : 0));
      break;
    }
  }
  for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++)
    sleep_ms(1);
  close_fds();
}

uint64_t r[1] = {0xffffffffffffffff};

void execute_call(int call)
{
  intptr_t res = 0;
  switch (call) {
  case 0:
    NONFAILING(memcpy((void*)0x20000180, "ext4\000", 5));
    NONFAILING(memcpy((void*)0x200000c0, "./file0\000", 8));
    NONFAILING(memcpy((void*)0x200005c0, "noauto_da_alloc", 15));
    NONFAILING(*(uint8_t*)0x200005cf = 0x2c);
    NONFAILING(memcpy((void*)0x200005d0, "grpquota", 8));
    NONFAILING(*(uint8_t*)0x200005d8 = 0x2c);
    NONFAILING(memcpy((void*)0x200005d9, "errors=continue", 15));
    NONFAILING(*(uint8_t*)0x200005e8 = 0x2c);
    NONFAILING(memcpy((void*)0x200005e9, "data_err=ignore", 15));
    NONFAILING(*(uint8_t*)0x200005f8 = 0x2c);
    NONFAILING(memcpy((void*)0x200005f9, "nolazytime", 10));
    NONFAILING(*(uint8_t*)0x20000603 = 0x2c);
    NONFAILING(memcpy((void*)0x20000604, "errors=continue", 15));
    NONFAILING(*(uint8_t*)0x20000613 = 0x2c);
    NONFAILING(memcpy((void*)0x20000614, "grpjquota=", 10));
    NONFAILING(*(uint8_t*)0x2000061e = 0x2c);
    NONFAILING(memcpy((void*)0x2000061f, "errors=remount-ro", 17));
    NONFAILING(*(uint8_t*)0x20000630 = 0x2c);
    NONFAILING(memcpy((void*)0x20000631, "nobarrier", 9));
    NONFAILING(*(uint8_t*)0x2000063a = 0x2c);
    NONFAILING(*(uint8_t*)0x2000063b = 0);
    NONFAILING(memcpy(
        (void*)0x20000980,
        "\x78\x9c\xec\xdb\xcf\x6f\x14\x55\x1c\x00\xf0\xef\xcc\xb6\x45\x41\x68"
        "\x45\x14\x41\x54\x14\x8d\x8d\x3f\x5a\x5a\x50\x39\x78\xd1\x68\xe2\x41"
        "\x13\x13\x3d\xe0\xb1\xb6\x85\x00\x0b\x35\xb4\x26\x42\x88\x56\x63\xf0"
        "\x68\x48\xbc\x1b\x8f\x26\xfe\x05\x9e\xf4\x62\xd4\x93\x89\x57\xbc\x1b"
        "\x12\xa2\x5c\x40\x4f\x6b\x66\x77\xa6\x6c\x97\xdd\xed\x2e\x94\x5d\xe8"
        "\x7e\x3e\xc9\x36\xef\xed\xbc\xe9\x7b\xdf\x9d\x79\x33\x6f\xe6\xcd\x04"
        "\x30\xb0\xf6\x66\x7f\x92\x88\xfb\x22\xe2\x62\x44\x8c\xd6\xb2\x2b\x2a"
        "\x79\xa1\xac\xdc\xb5\x2b\xe7\x66\xff\xbd\x72\x6e\x36\x89\x4a\xe5\xdd"
        "\xbf\x93\x6a\xb9\xab\x57\xce\xcd\x16\x65\x8b\xf5\xb6\xe4\x99\xf1\x34"
        "\x22\xfd\x22\xc9\x2b\x59\x6d\xf1\xcc\xd9\x13\x33\xe5\xf2\xfc\xe9\x3c"
        "\x3f\xb9\x74\xf2\xc3\xc9\xc5\x33\x67\x5f\x38\x76\x72\xe6\xe8\xfc\xd1"
        "\xf9\x53\xd3\x87\x0e\x1d\x3c\x30\xf5\xf2\x4b\xd3\x2f\xae\x4b\x9c\x59"
        "\x7c\x57\x77\x7f\xb2\xb0\x67\xd7\x9b\xef\x5f\x78\x7b\xf6\xf0\x85\x0f"
        "\x7e\xfd\x3e\xc9\xbf\x8f\x86\x38\x3a\x31\xdc\x41\x99\xbd\x59\xe0\xff"
        "\x54\xaa\x1a\x97\x3d\xdd\x4d\x65\x77\x81\xad\x75\xe9\x64\xa8\x8f\x0d"
        "\xa1\x2b\xa5\x88\x18\xca\xf7\xe7\x8b\x31\x1a\xa5\xb8\xbe\xf1\x46\xe3"
        "\x8d\xcf\xfb\xda\x38\xe0\xb6\xca\xce\x4d\x9b\x5a\x2f\x5e\xae\x00\x1b"
        "\x58\x12\xfd\x6e\x01\xd0\x1f\xc5\x89\x3e\xbb\xfe\x2d\x3e\x3d\x1a\x7a"
        "\xdc\x11\x2e\xbf\x5a\xbb\x00\xca\xe2\xbe\x96\x7f\x6a\x4b\x86\x22\xcd"
        "\xcb\x0c\x37\x5c\xdf\xae\xa7\xbd\x11\x71\x78\xf9\xbf\x6f\xb2\x4f\xdc"
        "\xc4\x7d\x08\x00\x80\x6e\xfd\x98\x8d\x7f\x9e\x6f\x36\xfe\x4b\xa3\x7e"
        "\x8c\xb8\x2d\x9f\x1b\x1a\x8b\x88\xfb\x23\x62\x7b\x44\x3c\x10\x11\x3b"
        "\x22\xe2\xc1\x88\x78\x28\x22\x76\x46\xc4\xc3\x9d\x55\x7b\xbc\x48\x34"
        "\x4e\x0d\xdd\x38\xfe\x49\x2f\xdd\x6a\x8c\xed\x64\xe3\xbf\x57\xf2\xb9"
        "\xad\xd5\xe3\xbf\x62\xf4\x17\x63\xa5\x3c\xb7\xb5\x1a\xff\x70\x72\xe4"
        "\x58\x79\x7e\x7f\xfe\x9b\x8c\xc7\xf0\xa6\x2c\x3f\xd5\xa6\x8e\x9f\x5e"
        "\xff\xe3\xab\x56\xcb\xea\xc7\x7f\xd9\x27\xab\xff\xf0\xaa\xc9\xa5\xf4"
        "\xd2\x50\xc3\x0d\xba\xb9\x99\xa5\x99\x8e\x26\xa0\x3a\x70\xf9\xb3\x88"
        "\xdd\x43\xcd\xe2\x4f\x56\x66\x02\x92\x88\xd8\x15\x11\xbb\xbb\xfb\xd7"
        "\xdb\x8a\xc4\xb1\x67\xbf\xdb\xd3\xaa\x50\xd3\xf8\xf3\xb1\xf0\x9a\xd6"
        "\x61\x9e\xa9\xf2\x6d\xc4\x33\xb5\xed\xbf\x1c\x0d\xf1\x17\x92\xf6\xf3"
        "\x93\x93\xf7\x44\x79\x7e\xff\x64\xb1\x57\xdc\xe8\xb7\xdf\xcf\xbf\xd3"
        "\xaa\xfe\x5b\x8a\x7f\x1d\x64\xdb\x7f\xf3\xea\xfd\xbf\xb1\xc8\x58\x52"
        "\x3f\x5f\xbb\xd8\x7d\x1d\xe7\xff\xfc\xb2\xe5\x35\xcd\xda\xf1\x37\xdf"
        "\xff\x47\x92\xf7\xaa\xc7\xa3\x91\xfc\xbb\x8f\x67\x96\x96\x4e\x4f\x45"
        "\x8c\x24\x6f\xd5\xd6\xaa\xff\x7e\xfa\xfa\xba\x45\xbe\x28\x9f\xc5\x3f"
        "\xbe\xaf\x79\xff\xdf\x9e\xaf\x93\xc5\xff\x48\x44\x64\x3b\xf1\xa3\x11"
        "\xf1\x58\x44\x3c\x9e\xb7\xfd\x89\x88\x78\x32\x22\xf6\xb5\x89\xff\x97"
        "\xd7\x9e\x3a\xde\x65\xfc\x49\x9b\x7f\xb7\xae\xb2\xf8\xe7\x9a\x1e\xff"
        "\x56\x9a\xd0\xb0\xfd\xbb\x4f\x94\x4e\xfc\xfc\x43\xab\xfa\x3b\xdb\xfe"
        "\x07\xab\xa9\xf1\xfc\x9b\xea\xf1\x6f\x0d\x9d\x36\xf0\x56\x7e\x3b\x00"
        "\x00\x00\xb8\x5b\xa4\xd5\x67\xe0\x93\x74\x62\x25\x9d\xa6\x13\x13\xb5"
        "\x67\xf8\x77\xc4\xe6\xb4\xbc\xb0\xb8\xf4\xdc\x91\x85\x8f\x4e\xcd\xd5"
        "\x9e\x95\x1f\x8b\xe1\xb4\xb8\xd3\x35\x5a\x77\x3f\x74\x2a\x59\xce\x9f"
        "\x26\x8e\xea\xd5\xf7\x74\x7e\xaf\xb8\x58\x7e\x20\xbf\x6f\xfc\x75\xe9"
        "\xde\x6a\x7e\x62\x76\xa1\x3c\xd7\xe7\xd8\x61\xd0\x6d\xa9\xeb\xff\xdb"
        "\x77\x5e\xef\xff\x99\xbf\x4a\xab\xcb\xae\xcc\x88\x78\xbf\x03\x36\x0e"
        "\xfd\x19\x06\x57\x63\xff\x4f\xfb\xd4\x0e\xa0\xf7\x9c\xff\x61\x70\xe9"
        "\xff\x30\xb8\xf4\x7f\x18\x5c\xcd\xfa\xff\xa7\x0d\xf9\x52\x8f\xda\x02"
        "\xf4\x96\xf3\x3f\x0c\xae\xb5\xfa\x7f\xcf\xde\x46\x02\x7a\xce\xf9\x1f"
        "\x06\x97\xfe\x0f\x03\xa9\xdd\xbb\xf1\xc9\xcd\xbf\xf2\x2f\xd1\xdf\x44"
        "\x2c\xdf\xfe\x2a\xd2\x3b\x22\xd2\xdb\x95\x18\xe9\xa0\x83\x6c\xe8\xc4"
        "\x8d\xc7\x8a\x21\xe3\x04\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xe0\x2e\xf4\x7f\x00"
        "\x00\x00\xff\xff\x18\xe0\xef\x43",
        1130));
    NONFAILING(syz_mount_image(/*fs=*/0x20000180, /*dir=*/0x200000c0,
                               /*flags=*/0, /*opts=*/0x200005c0, /*chdir=*/1,
                               /*size=*/0x46a, /*img=*/0x20000980));
    break;
  case 1:
    NONFAILING(memcpy((void*)0x20000000, "./file0\000", 8));
    syscall(__NR_chdir, /*dir=*/0x20000000ul);
    break;
  case 2:
    NONFAILING(memcpy((void*)0x20000000, "./bus\000", 6));
    syscall(__NR_open, /*file=*/0x20000000ul,
            /*flags=O_NOFOLLOW|O_NOCTTY|O_NOATIME|O_CREAT|O_RDWR*/ 0x60142ul,
            /*mode=*/0ul);
    break;
  case 3:
    NONFAILING(memcpy((void*)0x20000380, "/dev/loop", 9));
    NONFAILING(*(uint8_t*)0x20000389 = 0x30);
    NONFAILING(*(uint8_t*)0x2000038a = 0);
    NONFAILING(memcpy((void*)0x20000140, "./bus\000", 6));
    syscall(__NR_mount, /*src=*/0x20000380ul, /*dst=*/0x20000140ul,
            /*type=*/0ul, /*flags=MS_BIND*/ 0x1000ul, /*data=*/0ul);
    break;
  case 4:
    NONFAILING(memcpy((void*)0x20000080, "./bus\000", 6));
    res =
        syscall(__NR_open, /*file=*/0x20000080ul,
                /*flags=O_SYNC|O_NOCTTY|O_DIRECT|O_CLOEXEC|O_RDWR*/ 0x185102ul,
                /*mode=*/0ul);
    if (res != -1)
      r[0] = res;
    break;
  case 5:
    NONFAILING(memcpy((void*)0x20000300, "blkio.bfq.idle_time\000", 20));
    syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x20000300ul,
            /*flags=*/0x26e1, /*mode=*/0);
    break;
  case 6:
    syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0xb36000ul,
            /*prot=PROT_WRITE*/ 2ul,
            /*flags=MAP_STACK|MAP_POPULATE|MAP_FIXED|MAP_SHARED*/ 0x28011ul,
            /*fd=*/r[0], /*offset=*/0ul);
    break;
  case 7:
    NONFAILING(*(uint32_t*)0x20001040 = 0xf);
    NONFAILING(memcpy(
        (void*)0x20001044,
        "\xa2\xe3\xad\x21\xed\x0d\x09\xf9\x1b\x5b\x09\x09\x87\xf7\x09\x06\xf8"
        "\x38\xe7\xff\x7f\xc6\xe5\x53\x9b\x0d\x3d\x0e\x8b\x08\x9b\x32\x33\x6d"
        "\x07\x06\x08\x90\xe0\x87\x8f\x0e\x1a\xc6\xe7\x04\x9b\x33\x4a\x95\x9b"
        "\x3e\x9a\x24\x0d\x5b\x67\xf3\x98\x8f\x7e\xf3\x19\x52\x01\x00\xff\xe8"
        "\xd1\x78\x70\x8c\x52\x3c\x92\x1b\x1b\x5b\x31\x07\x0b\x07\x58\x09\x36"
        "\xcd\x3b\x78\x13\x0d\xaa\x61\xd8\xe8\x04\x00\x00\x00\x58\x02\xb7\x7f"
        "\x07\x22\x72\x27\xb7\xba\x67\xe0\xe7\x86\x57\xa6\xf5\xc2\xa8\x74\xe6"
        "\x2a\x9c\xcd\xc0\xd3\x1a\x0c\x9f\x31\x8c\x0d\xa1\x99\x3b\xd1\x60\xe2"
        "\x33\xdf\x4a\x62\x17\x9c\x6f\x30\xe0\x65\xcd\x5b\x91\xcd\x0a\xe1\x93"
        "\x97\x37\x35\xb3\x6d\x5b\x1b\x63\xdd\x1c\x00\x30\x5d\x3f\x46\x63\x5e"
        "\xb0\x16\xd5\xb1\xdd\xa9\x8e\x2d\x74\x9b\xe7\xbd\x1d\xf1\xfb\x3b\x23"
        "\x1f\xdc\xdb\x50\x75\xa9\xaa\xa1\xb4\x69\xc3\x09\x00\x00\x00\x00\x00"
        "\x00\x00\x75\x27\x1b\x28\x63\x29\xd1\x69\x93\x42\x88\xfd\x78\x9a\xa3"
        "\x7d\x6e\x98\xb2\x24\xfd\x44\xb6\x5b\x31\x33\x4f\xfc\x55\xcc\x82\xcd"
        "\x3a\xc3\x2e\xcd\xb0\x8c\xed\x6f\x90\x81\xb4\xdd\x0d\x8b\x38\xf3\xcd"
        "\x44\x98\xbe\xe8\x00\x49\x08\x41\xbd\xb1\x14\xf6\xb7\x63\x83\x70\x1d"
        "\x8f\x5c\x55\x43\x2a\x90\x9f\xda\x03\x9a\xec\x54\xa1\x23\x6e\x80\xf6"
        "\xa8\xab\xad\xea\x76\x62\x49\x6b\xdd\xbb\x42\xbe\x6b\xfb\x2f\x17\x95"
        "\x9d\x1f\x41\x6e\x56\xc7\x1b\x19\x31\x87\x02\x62\xf5\xe8\x01\x11\x92"
        "\x42\xca\x02\x6b\xfc\x82\x1e\x7e\x7d\xaf\x24\x51\x13\x8e\x64\x5b\xb8"
        "\x0c\x61\x76\x69\x31\x4e\x2f\xbe\x70\xde\x98\xec\x76\xa9\xe4\x0d\xad"
        "\x47\xf3\x6f\xd9\xf7\xd0\xd4\x2a\x4b\x5f\x11\x85\xcc\xdc\xf1\x6f\xf4"
        "\x62\x95\xd8\xa0\xfa\x17\x71\x3c\x58\x02\x63\x09\x33\xa9\xa3\x4a\xf6"
        "\x74\xf3\xf3\x9f\xe2\x34\x91\x23\x7c\x08\x82\x2d\xec\x11\x09\x11\xe8"
        "\x93\xd0\xa8\xc4\xf6\x77\x74\x7a\xbc\x36\x09\x34\xb8\x29\x10\xff\x85"
        "\xbf\xd9\x95\x08\x3b\xba\x29\x87\xa6\x73\x99\xea\xc4\x27\xd1\x45\xd5"
        "\x46\xa4\x0b\x9f\x6f\xf1\x4a\xc4\x88\xec\x13\x0f\xb3\x85\x0a\x27\xaf"
        "\x95\x44\xae\x15\xa7\xe4\x54\xde\xa0\x59\x18\xb4\x12\x43\x51\x3f\x00"
        "\x00\x00\x00\x00\x00\x00\x0a\x36\x21\xc5\x6c\xea\x8d\x20\xfa\x91\x1a"
        "\x0c\x41\xdb\x6e\xbe\x8c\xac\x64\xf1\x76\x79\x2a\x1d\x54\xb3\x4b\xbc"
        "\x99\x63\xac\x4f\x4b\xb3\x30\x96\x03\xf1\xd4\xab\x96\x62\x03\x86\x1b"
        "\x5b\x15\xa8\x41\xf2\xb5\x75\xa8\xbd\x0d\x78\x24\x8e\xbe\x4d\x9a\x80"
        "\x00\x26\x95\x10\x4f\x67\x4c\x24\x31\xdc\xa1\x41\xfa\xe2\x69\xca\xb7"
        "\x0e\x9a\x66\xf3\xc3\xa9\xa6\x3e\x96\x39\xe1\xf5\x9c\x0e\xde\x26\xc6"
        "\xb5\xd7\x4b\x07\x8a\x5e\x15\x77\x1a\xaa\x18\x11\x9a\x86\x7e\x10\x88"
        "\x33\x49\x75\xe9\xf7\x34\x83\xb6\xa6\x2f\xa6\x78\xca\x14\xff\xd9\xf9"
        "\xdb\x2a\x78\x69\xd8\x58\x64\x05\x65\x26\xf8\x89\xaf\x43\xa6\x05\x60"
        "\x80\x57\x22\x86\x52\x24\x49\xdf\x46\x6c\x63\x2b\x35\x70\x24\x3f\x98"
        "\x9c\xce\x7c\xd9\xf4\x65\xe4\x1e\x61\x0c\x20\xd8\x04\x21\xd6\x53\xa5"
        "\x52\x00\x00\x00\x82\x13\xb7\x04\xc7\xfb\x08\x2f\xf2\x75\x90\x67\x8e"
        "\xf9\xf1\x90\xba\xe9\x79\x09\x50\x70\x41\xd8\x60\x42\x0c\x56\x64\xb2"
        "\x79\x21\xb1\x4d\xc1\xdb\x88\x92\xfd\x32\xd0\xad\x7b\xad\x8d\xef\xf4"
        "\xb0\x5f\x60\xce\xa0\xda\x77\x10\xac\x00\x00\x00\x00\x00\x00\x80\x00"
        "\xbe\xa3\x7c\xe0\xd0\xd4\xaa\x20\x2f\x92\x8f\x28\x38\x1a\xab\x14\x4a"
        "\x5d\x42\x9a\x04\xa6\xa2\xb8\x3c\x70\x68\xae\x94\x9e\xd0\x6e\x28\x8e"
        "\x81\x0b\xac\x9c\x76\x60\x00\x25\xe1\x9c\x90\x7f\x8e\xa2\xe2\x01\x00"
        "\x00\x00\x82\x71\xa1\xf5\xf8\x52\x8f\x22\x7e\x79\xc1\x38\x9d\xbd\xff"
        "\xfe\x49\x2f\x21\x57\x9d\x2c\x15\xb8\xc7\x0c\xdb\x1c\x33\x2d\x86\xd8"
        "\x73\x41\x43\x27\x50\x86\x1e\xc2\xbc\x34\x51\xed\xca\x19\x4b\x22\x1c"
        "\xfe\xc4\x60\x3d\x27\x6b\xba\xa1\xdf\xa6\xd4\xfb\x8a\x48\xa7\x6e\xaf"
        "\xc9\xa9\xa0\x27\x0e\x4c\x10\xd6\x4c\xd5\xa6\x24\x27\x26\x4f\x23\x77"
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        "\xb1\xfd\xcc\x7c\xbb\x61\xa7\xcd\xb9\x74\x4e\xd7\xf9\x12\x9a\xed\xe2"
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        "\xfc\xcf\xcb\xb2\xb7\x5a\x1d\x83\xc4\x6e\xb6\x5c\xa8\x10\x4e\x1b\x4d"
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        "\xe7\xb7\x01\x9c\x98\x2c\xd3\xb4\x3e\xae\xb1\xa5\xfb\x13\x5c\x0c\x7d"
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        "\x02\xd5\x67\x6d\x95\xf1\x60\xec\x97\xb1\xad\x94\x87\x2c\xb2\x04\x46"
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        "\xa3\xd3\x61\xc0\x40\xba\xbb\x17\x16\x07\xca\xac\x2a\x35\x59\xad\x4f"
        "\x75\x46\x5f\x49\xc0\xd0\xae\x37\x16\xdb\x6e\x00\xcb\x11\xdb\x4a\x5f"
        "\xad\xe2\xa5\x7c\x10\x23\x8e\x20\x4a\x67\x73\x7c\x3b\x42\xaa\xe5\x01"
        "\xb2\x0f\x76\x94\xa0\x0f\x16\xe2\xd0\x17\x40\x35\xa2\xc2\x26\x56\xdc"
        "\x29\x88\x0a\xce\xbd\xbe\x8d\xdb\xd7\x5c\x2f\x99\x8d\x8a\xc2\xdf\xad"
        "\x2b\xa3\xa5\x04\x76\x7b\x6b\x45\xa4\x59\x57\xf2\x4d\x75\x8e\xd0\x24"
        "\xb3\x84\x9c\x11\xd4\x12\xa2\xa0\x3b\x40\x47\x49\x70\x22\xd9\xc3\x0e"
        "\x23\xef\x4d\xf5\xc8\x96\x44\xf4\x8b\xb5\x36\xf7\x94\x5b\x59\xd7\xbc"
        "\xdd\xff\x75\x44\x13\xd1\x35\x27\x3e\xa8\xe7\x5f\x22\xf2\x16\xc6\xb9"
        "\x99\x0a\xe7\x18\x06\xf2\xc0\x0b\x40\x25\xc4\x8b\x75\xc0\xf7\x3c\xdb"
        "\x9a\x7b\x8f\xa3\x67\xb5\x00\x28\x06\x7e\x7f\x16\xfe\xdd\x56\x9d\x46"
        "\x2f\x4f\x19\xea\xcd\xb3\xed\x70\xee\xeb\xb4\x48\x3f\x8f\xd7\x77\xd4"
        "\x43\xe8\xb4\x04\x27\xdb\x6f\xe2\x90\x68\xc0\xca\x3d\x24\x14\x44\x2e"
        "\x8f\x3a\x15\x47\x04\xb0\xe5\x1b\xc6\x64\xa1\x37\xb2\x6b\xe7\x19\xf4"
        "\xf7\xc9\xa5\x67\x8a\x67\x4d\xfc\x95\xdf\x80\xb9\xce\x37\x5d\xd6\x49"
        "\xc8\xc7\x04\xe5\x09\xbd\x88\xc8\xe6\x3d\x8c\x7d\xd6\x70\x71\x11\x5c"
        "\x89\x82\xba\x46\xaf\x4d\x6a\xdc\xc9\xf6\x8a\x75\xb9\x39\x7b\x03\x51"
        "\x53\xfa\xf4\x63\x66\xe7\x20\x5d\xd8\xd6\xf3\x75\x25\xc1\xa0\xe9\x46"
        "\x10\xdd\x94\x32\x3f\x6c\x15\xd0\x85\x19\x71\x49\xbf\xd6\x65\x55\x48"
        "\xcf\xd9\xc5\x2c\x97\x11\x93\x7f\x79\xab\xb1\xa1\x24\xf1\x21\x04\x65"
        "\x48\x3c\xd3\xb2\xd7\x83\x78\xcf\xb8\x5e\xd8\x2e\x7d\xa0\xf6\xeb\x6d"
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        "\x54\xfb\x39\xdd\xff\x3b\x48\x44\x39\xff\x15\x8e\x7c\x54\x19\xe0\x37"
        "\xf3\xe3\xad\x03\x8f\x22\x11\xf1\x03\x31\x95\x56\x3c\x7f\x93\xcd\x54"
        "\xb9\x09\x4f\x22\x6e\x78\x32\x71\xe1\xe5\xa2\xa2\xc1\x07\x12\xea\xb6"
        "\x25\xd6\x49\x31\xcd\x4f\xfe\x67\x38\xd9\x7b\x9b\x5e\xf8\x28\xee\x9f"
        "\xb0\x6f\xfc\x01\xaf\x0e\x79\xc1\xe1\x4b\x1d\x25\x98\x8c\x69\xa3\x99"
        "\x56\x7c\x1d\x93\x76\x8f\x79\x71\xd3\x14\x88\xb8\x65\x8a\x20\x87\x8b"
        "\x7c\x1d\xd7\xba\x02\xfc\x42\x93\x9d\xde\x3d\x4a\x33\x39\xa6\x5d\x50"
        "\x7d\xc5\x9c\x51\x09\x7b\x40\x51\x77\x05\xda\x56\xe9\xeb\xf0\xaf\xa5"
        "\x32\x82\xbf\x86\xdb\xb5\x8c\x54\x80\x69\xff\x6e\xb9\x5a\xad\xe7\xcc"
        "\x66\xd7\xbb\xef\x72\x47\x79\xca\x1f\x73\x1b\x33\x46\xff\x17\x70\x50"
        "\x37\x3d\x79\xff\x7b\x3e\x7f\x9b\xc0\xc1\xb4\xb2\x66\xa8\x87\x8b\x90"
        "\xba\xaa\x03\x9d\x3e\x3b\x63\x97\x9a\xc3\xdf\x6e\x6f\x48\x59\xaf\xd5"
        "\x02\x38\xc7\x54\x7a\x39\xb6\x08\x10\x93\x80\x44\xae\x18\x5d\x2b\xa3"
        "\xe0\x0a\x4e\x73\x67\x68\x64\xae\x09\x0d\x81\xea\xee\x5e\xe6\xcf\x1d"
        "\x0a\xb3\x78\xdd\x4d\xd8\x91\xe9\x37\xc2\xea\x54\x10\xe0\x51\x30\x05"
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        "\x69\x7b\x52\x16\x06\x87\x46\x16\x02\xf8\x8d\xf1\x65\xd8\x84\xb3\x6e"
        "\xc2\xb6\xc2\x5a\x2f\x33\xc7\x15\x68\x7e\x9d\x4a\xfb\x96\xd6\x86\x1a"
        "\xca\x47\xda\x73\xd6\xf3\x14\x43\x45\xf4\x88\x43\xdd\x01\x4e\x5c\x5a"
        "\xd8\xfe\x99\x57\x54\xbd\x9c\xf3\x2f\xce\x1e\x31\x91\x9c\x4b\x20\x82"
        "\xfb\x0a\x30\xb9\xde\xae\x84\xbe\xd4\xb2\x80\x45\x63\x40\x73\xc9\xc5"
        "\x8c\x89\xd9\xe9\x9c\x81\x76\x91\x77\xc6\xd5\x94\xf8\x8a\x4f\xac\xfd"
        "\x4c\x73\x5a\x20\x30\x7c\x73\x7a\xfa\x2d\x60\x39\x94\x73\x29\x6b\x83"
        "\x1d\xbd\x93\x3d\x93\x99\x4b\xa3\x06\x42\x79\xb1\x0e\xa0\xc5\x83\x3f"
        "\x41\xf1\x57\xea\x23\x02\x99\x3d\xbe\x43\x3b\x1a\xa3\xa3\x76\x6d\x54"
        "\x39\x02\x04\x84\xf4\x11\x3c\x4c\x85\x94\x65\xc3\xb4\x15\xc3\x43\x2f"
        "\x81\xdb\x87\x19\x53\x9d\x5b\xf3\x72\xaa\xae\xa1\xcc\x43\xa6\xc5\xcb"
        "\xe5\x97\x58\xbf\xee\x29\x16\x58\x0d\xac\x4b\x00\x8e\x59\x5f\x43\x74"
        "\x91\xd8\x7a\xbe\xd0\x2c\xef\xcd\x9d\xb5\x3d\x94\xd0\x2d\xae\xe6\x79"
        "\x18\xe5\xd6\x78\x74\x63\x18\x3b\x4b\x87\xc1\x05\x00\x00\x00\x2f\x78"
        "\x09\x95\x9b\xc0\x48\x85\x06\x13\xd1\x7c\xa5\x10\x55\xf2\xf4\x16\xa4"
        "\x4f\xe1\x80\xd2\xd5\x0c\x31\x2c\xca\x7c\xb1\x4a\x2b\xdc\x33\x1f\x57"
        "\xa9\x81\x71\x39\xa2\x06\xfc\x76\x95\x72\x27\xff\xff\x2d\xe2\x0a\x4b"
        "\x8e\x37\x37\xfb\xb4\x29\x13\x77\x7c\x06\x37\x6f\x79\x9e\xba\x36\x7e"
        "\x21\xf9\x4c\xa5\x98\x70\x5f\x5d\xcb\x76\x7d\x6f\x09\x00\xd6\xb0\xf6"
        "\x09\x5e\x53\xc4\xc4\x23\x4d\x0c\x1f\xbe\x43\x4f\x6a\xb8\xf4\x3c\x00"
        "\x13\xee\x93\xb8\x39\x46\xee\x77\x59\xe8\x9d\x7b\xdd\x1a\x32\xd7\xb3"
        "\x11\x71\x1b\x75\x7f\xe4\x3c\x06\xd2\x1a\x35\x81\x0d\x8f\xe9\x8b\x27"
        "\xfa\xea\x8a\xa1\x2b\xc8\x71\x6e\xef\xc5\xc9\x7c\x45\xac\x33\xee\xec"
        "\x96\x4c\x52\x14\xbc\x3a\x93\x59\xbd\xea\x1c\xcc\xab\x94\xf1\x5e\x36"
        "\x31\x9c\xb3\x4e\xbc\xac\xed\xb8\x2c\x2e\xd3\xde\x5a\x8a\x8f\x00\x11"
        "\xe8\xf7\x4e\x82\xd7\xf9\x60\x93\x53\x0e\x76\x69\x28\x39\xd7\x96\x19"
        "\x39\xad\xfd\xee\xea\xff\x19\xd1\x1e\xfc\xaf\xb6\xd5\x46\xfe\xf2\x71"
        "\xe8\x9d\x6c\xc2\x38\x9e\x81\xff\x58\xce\xfc\xce\x3f\xbf\x46\x25\xa7"
        "\xe7\xde\x40\xe4\x2e\x07\xb3\x44\x49\xe1\x5e\x06\x5c\xc7\x34\x00\x02"
        "\x00\x00\x00\x00\x00\x00\xf2\x88\xa4\x51\x0d\xe0\x3d\xab\x19\xd2\x62"
        "\x85\xed\xa8\x91\x56\xd5\x0d\xd3\x85\xa6\x03\x33\xba\x5b\xbf\x5d\x77"
        "\xcd\x70\x07\xad\x15\x19\xad\x54\x70\xde\x3d\xd6\xd6\x08\x0c\xaf\xcc"
        "\xf8\xa9\x74\x06\xbb\x6b\x68\xa1\xf0\xc4\x54\x98\x20\xa7\x3c\x88\x0f"
        "\x47\x5f\x73\x2a\xe0\x03\x98\xe8\xbd\x1f\x41\x08\xb7\x80\x7f\xb3\x3b"
        "\x72\x68\x5e\xc3\x7a\x2d\x3f\x76\x64\x13\xa6\x04\x59\x51\x62\x46\xe5"
        "\xa1\xd9\x98\xa2\x01\x7a\xef\x09\x48\xa6\x8c\xf2\x55\x31\x5a\xb8\x0d"
        "\xd3\x49\xe8\x91\xae\xf5\x95\xdc\x4d\x47\x0e\x8a\xc3\x2a\x30\x8e\x15"
        "\xfc\x37\xd0\x6a\xea\xc2\x89\xc0\x52\x3f\x48\x3e\x1f\xf7\x40\x8c\x60"
        "\x87\xf1\xab\x65\x2f\x2e\xf9\x1d\x4f\x2b\x01\x98\x7b\x0f\x46\xda\x03"
        "\x4e\x5c\x3f\x74\x5a\x7e\xe8\x10\x1a\x39\x34\xc5\x4e\x24\xb4\x8e\xc0"
        "\x27\x5e\x2d\x06\x87\xdc\x74\x6b\x08\x27\xcb\xf6\x52\xf4\x06\xc6\xb9"
        "\x5f\x27\x22\xe5\x8c\x05\xf7\x52\xce\x21\x26\x59\x6e\x1c\xd7\x65\x5b"
        "\x90\x48\x01\x78\x4c\x41\x6b\x22\xf7\x3c\x05\x46\x78\xe2\x72\x4f\x43"
        "\xf1\xfe\x68\x7c\x7e\x8a\x60\xc2\x8b\x82\xb6\x52\x83\x41\xb6\x03\x00"
        "\x00\x00\x00\x00\x00\x00\x15\xda\x20\x2d\x5e\xcd\x36\xde\xa3\xbc\xa0"
        "\xb7\x42\x7d\x83\x92\xc6\x28\x94\x55\xe8\xf8\xd2\xab\x22\x42\x72\x92"
        "\x51\xae\x03\x3a\x9e\x02\x21\x0e\x62\xdf\x05\x46\xa7\x4b\x33\x3a\x1c"
        "\x48\xf9\x5f\xd5\x4a\xcb\x57\x41\x25\x9e\x8c\x54\x88\xef\xee\xe3\x27"
        "\x41\x5c\xc1\x94\x51\x43\x2c\x6f\x14\xc2\x76\x93\x10\x2a\x3c\xd8\x48"
        "\x57\xcd\x65\x86\xfc\x5c\xa9\xa9\x3e\xb0\x14\x5f\xac\x06\x62\xff\x86"
        "\x10\x7f\x99\x8a\x8e\xf7\xdf\x8a\xa1\x40\x46\xc5\x5b\x03\xd3\xd4\x7f"
        "\x88\xa8\xd6\x0f\x77\x74\xa2\xee\x08\x75\x88\x97\xfb\x41\x1a\x94\xb3"
        "\xc2\xfc\x5d\x5f\x0d\xb4\x2c\x04\x56\xec\x01\x5f\x08\xe5\x24\x7d\x33"
        "\xae\x2d\x35\x60\x3f\xf8\x45\x4c\x16\xf8\x34\x28\x56\x93\x51\x25\x10"
        "\x2b\xb7\x84\xed\x71\x48\xb6\xce\x43\x1b\x63\xee\x35\x6b\x0c\x78\x5f"
        "\x2f\x47\xb9\x0e\x29\x38\x9f\x22\xfc\x5b\x59\xa7\x0e\xfa\xea\x2b\xd4"
        "\x01\x95\xaf\x44\x86\x22\x0d\x70\x2e\x30\xbf\xc4\x3c\x10\xec\x23\xea"
        "\x62\x83\x99\x4a\x7d\xde\x4d\xcb\x61\xfe\xa6\xb6\x51\xfb\x1d\x62\x45"
        "\x8d\x07\x41\xa1\x28\x30\x05\x2f\xcc\x46\x0d\xb0\x43\xaf\xe5\x25\x62"
        "\x9b\x40\xd7\xce\xe4\x58\xe4\xcb\x5e\x93\x0e\xd6\x24\x80\x6c\x43\xa0"
        "\x06\xe3\x93\x36\xd0\x7c\x2b\x80\x81\xc1\x28\xad\x27\x06\xf4\x82\x61"
        "\xf7\x89\x74\x84\xc2\x97\xa1\xa6\x61\x3b\xc1\x8f\x5a\x38\xd4\x42\x76"
        "\x8a\xf3\x80\x41\xef\xe0\x3d\x15\x2e\xf9\x5f\xf5\x69\xe7\x6d\xb2\x39"
        "\x1f\x45\x09\xd7\xf3\x39\xd9\x2f\xdb\x4a\x89\x36\x49\x49\xda\x39\x80"
        "\x00\x00\x00\x00\x00\x00\x00\xd8\x0a\x4f\xe6\x54\x57\x83\x76\xe5\x99"
        "\xaf\xf3\x56\x5b\x1d\x53\x1f\x30\x91\x2b\x99\x45\x03\x0b\x81\xea\x99"
        "\x35\xfd\x46\xed\xb4\x4a\x78\xf6\x15\x25\x54\x90\xa4\xb6\x21\x50\x1f"
        "\x2a\x9e\x4d\x2c\x62\x4c\x4d\xac\x92\x74\x11\x8c\x67\x58\x4f\x5d\x37"
        "\x47\x55\x53\x4d\x7f\x68\xf6\x79\xc4\xff\x51\x6a\x9c\x86\x1a\x0e\x7e"
        "\x65\x86\x8f\xcb\x2b\xf1\xcb\x9a\xea\x4e\x05\xdf\x72\x27\x9f\xdb\x0d"
        "\x2b\x9e\x93\x5c\x5a\xf3\xcf\x47\x4b\xed\x79\xdf\xc2\x48\xc1\xf5\xae"
        "\xa4\xb8\xb3\x2c\x5d\x29\x5e\x57\x07\x9d\x0f\xe6\x62\xa4\x6b\x7f\x71"
        "\xcd\x47\x74\x4d\xb8\x6c\x50\xb7\x04\xc9\x71\xd9\x02\x95\xc7\xb2\xc7"
        "\x43\x9a\x2d\x78\xcc\xfa\x79\xb5\xfc\x2b\xff\x6b\xbf\x84\x02\x62\xbf"
        "\x89\x39\x4b\x3e\x06\x91\x95\x32\x64\xd2\x70\x0c\x83\x8f\xa2\xc7\xb3"
        "\x42\x52\x60\xf5\x95\x54\xe5\x02\xdc\xea\x39\xcb\x31\x3b\x00\x00\x00"
        "\x00\x00\x00\x4c\xa7\xc1\x2f\x45\x85\x8d\x62\x84\xca\x62\x70\xd6\xb2"
        "\xf0\xe5\x8f\xde\xd8\xa7\xb4\xa3\x02\xa9\x7b\xc6\x41\xdf\x07\x72\x0b"
        "\xa2\xb2\x6b\xbf\xcc\x80\x7c\xa0\xab\xb1\xb4\x43\x22\x26\x9c\x21\xc5"
        "\xec\x68\xcb\x06\x8e\xa8\x80\x67\xd9\x05\xea\x91\x7b\xb0\x3e\xef\xda"
        "\xeb\xde\xab\xf2\xd0\xdc\xe8\x09\x97\xc9\x15\xc8\x94\x9d\xe9\x92\x58"
        "\x7c\x2c\xb5\xfe\x36\xd7\xd3\xe5\xdb\x21\xb0\x94\xb8\xb7\x79\x40\xb5"
        "\xf0\x77\x22\xe4\x7a\x08\xd3\x67\xe5\xf8\x4c\x96\xec\x66\x4b\x72\x93"
        "\x4b\x99\xb3\x10\x9a\xf6\x5d\x77\xe8\x6a\xbd\x68\x59\xcd\xdf\x4b\xba"
        "\xe1\xf0\x93\x04\x62\xdf\x15\xfd\xdb\xc4\x85\x62\xea\x35\x11\xa8\x06"
        "\x5e\xf0\x28\xcf\x12\xf1\x4d\xcf\x6e\xbe\xcd\x8d\x88\x48\x36\x17\x4f"
        "\xaf\x1a\xa6\x09\xe5\xf1\xee\x11\x62\xdf\xa1\x3b\xdc\x1f\xa7\xcf\xaa"
        "\xdb\xa8\x5c\x72\xe9\x75\x8f\x03\xa7\x55\xd0\xbe\x53\xf8\xd2\xa1\xdf"
        "\xb1\xc6\x8c\xc1\x64\xb0\xa0\x78\x0d\x97\x1a\x96\xea\x2c\x4d\x4c\xa0"
        "\x39\x8c\x22\x35\x98\x0a\x93\x07\xb3\xd5\xbd\x3b\x01\xfa\xff\xd0\xa5"
        "\xdb\xed\x28\x81\xa9\x70\x0a\xf5\x61\xac\x8c\x6b\x00\x00\x00\x00\x00"
        "\x00\x00\xf9\x6f\x06\x81\x7f\xb9\x03\x72\x9a\x7d\xb6\xff\x95\x76\x97"
        "\xc9\xed\xe7\x88\x5d\x94\xff\xb0\x96\x9b\xe0\xda\xf6\x0a\xf9\x31\x09"
        "\xeb\x1d\xee\x72\xe4\x36\x3f\x51\xaf\x62\xaf\x6f\xb2\xa6\xdf\x3b\xec"
        "\x89\x82\x2a\x7a\x0b\x67\x80\x58\xfa\x3f\xef\x86\xfa\xec\x21\x6e\xb6"
        "\x99\x21\x62\xf8\xdc\xbf\x71\x9c\x14\x8c\xd2\xf9\xc5\x5f\x49\x01\x20"
        "\x3a\x9a\x8a\x2c\x3e\x90\xf3\x94\x3d\xbc\x10\x36\x0a\x1a\x49\x70\x0d"
        "\x1d\xfb\xf6\x6d\x69\xf6\xfb\xaf\x50\x6c\x8b\xcc\xe8\xbb\x0d\x87\x2a"
        "\x02\x23\x89\x26\x40\x7a\x4e\xdd\xd5\xd0\xfc\x5a\x75\x2f\x90\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00",
        4096));
    NONFAILING(*(uint16_t*)0x20002044 = 0x1000);
    syscall(__NR_write, /*fd=*/-1, /*data=*/0x20001040ul, /*len=*/0x1006ul);
    break;
  case 8:
    NONFAILING(memcpy((void*)0x200002c0, "./file0\000", 8));
    syscall(__NR_mount, /*src=*/0ul, /*dst=*/0x200002c0ul, /*type=*/0ul,
            /*flags=*/0ul, /*opts=*/0ul);
    break;
  }
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1,
          /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0x1000000ul,
          /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1,
          /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x21000000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1,
          /*offset=*/0ul);
  const char* reason;
  (void)reason;
  install_segv_handler();
  use_temporary_dir();
  do_sandbox_none();
  return 0;
}