// https://syzkaller.appspot.com/bug?id=be6e90ce70987950e6deb3bac8418344ca8b96cd
// 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 <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/swap.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/falloc.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 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 void netlink_add_neigh(struct nlmsg* nlmsg, int sock, const char* name,
                              const void* addr, int addrsize, const void* mac,
                              int macsize)
{
  struct ndmsg hdr;
  memset(&hdr, 0, sizeof(hdr));
  hdr.ndm_family = addrsize == 4 ? AF_INET : AF_INET6;
  hdr.ndm_ifindex = if_nametoindex(name);
  hdr.ndm_state = NUD_PERMANENT;
  netlink_init(nlmsg, RTM_NEWNEIGH, NLM_F_EXCL | NLM_F_CREATE, &hdr,
               sizeof(hdr));
  netlink_attr(nlmsg, NDA_DST, addr, addrsize);
  netlink_attr(nlmsg, NDA_LLADDR, mac, macsize);
  int err = netlink_send(nlmsg, sock);
  if (err < 0) {
  }
}

static struct nlmsg nlmsg;

static int tunfd = -1;

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

#define IFF_NAPI 0x0010

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

#define DEVLINK_FAMILY_NAME "devlink"

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

static struct nlmsg nlmsg2;

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

static int runcmdline(char* cmdline)
{
  int ret = system(cmdline);
  if (ret) {
  }
  return ret;
}

#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);
}

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

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

#define MAX_FDS 30

//% 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");
  } else if (strncmp(fs, "gfs2", 4) == 0 &&
             (strstr(opts, "errors=panic") || strstr(opts, "debug"))) {
    strcat(opts, ",errors=withdraw");
  }
  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;
}

#define XT_TABLE_SIZE 1536
#define XT_MAX_ENTRIES 10

struct xt_counters {
  uint64_t pcnt, bcnt;
};

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

static void mount_cgroups2(const char** controllers, int count)
{
  if (mkdir("/syzcgroup/unified", 0777)) {
    return;
  }
  if (mount("none", "/syzcgroup/unified", "cgroup2", 0, NULL)) {
    if (rmdir("/syzcgroup/unified") && errno != EBUSY)
      exit(1);
    return;
  }
  if (chmod("/syzcgroup/unified", 0777)) {
  }
  int control = open("/syzcgroup/unified/cgroup.subtree_control", O_WRONLY);
  if (control == -1)
    return;
  int i;
  for (i = 0; i < count; i++)
    if (write(control, controllers[i], strlen(controllers[i])) < 0) {
    }
  close(control);
}

static void setup_cgroups()
{
  const char* unified_controllers[] = {"+cpu", "+io", "+pids"};
  const char* net_controllers[] = {"net", "net_prio", "devices", "blkio",
                                   "freezer"};
  const char* cpu_controllers[] = {"cpuset", "cpuacct", "hugetlb", "rlimit",
                                   "memory"};
  if (mkdir("/syzcgroup", 0777)) {
    return;
  }
  mount_cgroups2(unified_controllers,
                 sizeof(unified_controllers) / sizeof(unified_controllers[0]));
  mount_cgroups("/syzcgroup/net", net_controllers,
                sizeof(net_controllers) / sizeof(net_controllers[0]));
  mount_cgroups("/syzcgroup/cpu", cpu_controllers,
                sizeof(cpu_controllers) / sizeof(cpu_controllers[0]));
  write_file("/syzcgroup/cpu/cgroup.clone_children", "1");
  write_file("/syzcgroup/cpu/cpuset.memory_pressure_enabled", "1");
}

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

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

static void initialize_cgroups()
{
  if (mkdir("./syz-tmp/newroot/syzcgroup", 0700))
    exit(1);
  if (mkdir("./syz-tmp/newroot/syzcgroup/unified", 0700))
    exit(1);
  if (mkdir("./syz-tmp/newroot/syzcgroup/cpu", 0700))
    exit(1);
  if (mkdir("./syz-tmp/newroot/syzcgroup/net", 0700))
    exit(1);
  unsigned bind_mount_flags = MS_BIND | MS_REC | MS_PRIVATE;
  if (mount("/syzcgroup/unified", "./syz-tmp/newroot/syzcgroup/unified", NULL,
            bind_mount_flags, NULL)) {
  }
  if (mount("/syzcgroup/cpu", "./syz-tmp/newroot/syzcgroup/cpu", NULL,
            bind_mount_flags, NULL)) {
  }
  if (mount("/syzcgroup/net", "./syz-tmp/newroot/syzcgroup/net", NULL,
            bind_mount_flags, NULL)) {
  }
}

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

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

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

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

static void loop();

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

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

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

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

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

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

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

static void setup_loop()
{
  setup_cgroups_loop();
  checkpoint_net_namespace();
}

static void reset_loop()
{
  char buf[64];
  snprintf(buf, sizeof(buf), "/dev/loop%llu", procid);
  int loopfd = open(buf, O_RDWR);
  if (loopfd != -1) {
    ioctl(loopfd, LOOP_CLR_FD, 0);
    close(loopfd);
  }
  reset_net_namespace();
}

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

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

static const char* setup_binfmt_misc()
{
  if (mount(0, "/proc/sys/fs/binfmt_misc", "binfmt_misc", 0, 0) &&
      errno != EBUSY) {
    return NULL;
  }
  if (!write_file("/proc/sys/fs/binfmt_misc/register",
                  ":syz0:M:0:\x01::./file0:") ||
      !write_file("/proc/sys/fs/binfmt_misc/register",
                  ":syz1:M:1:\x02::./file0:POC"))
    return "write(/proc/sys/fs/binfmt_misc/register) failed";
  return NULL;
}

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

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

#define FUSE_MIN_READ_BUFFER 8192
enum fuse_opcode {
  FUSE_LOOKUP = 1,
  FUSE_FORGET = 2,
  FUSE_GETATTR = 3,
  FUSE_SETATTR = 4,
  FUSE_READLINK = 5,
  FUSE_SYMLINK = 6,
  FUSE_MKNOD = 8,
  FUSE_MKDIR = 9,
  FUSE_UNLINK = 10,
  FUSE_RMDIR = 11,
  FUSE_RENAME = 12,
  FUSE_LINK = 13,
  FUSE_OPEN = 14,
  FUSE_READ = 15,
  FUSE_WRITE = 16,
  FUSE_STATFS = 17,
  FUSE_RELEASE = 18,
  FUSE_FSYNC = 20,
  FUSE_SETXATTR = 21,
  FUSE_GETXATTR = 22,
  FUSE_LISTXATTR = 23,
  FUSE_REMOVEXATTR = 24,
  FUSE_FLUSH = 25,
  FUSE_INIT = 26,
  FUSE_OPENDIR = 27,
  FUSE_READDIR = 28,
  FUSE_RELEASEDIR = 29,
  FUSE_FSYNCDIR = 30,
  FUSE_GETLK = 31,
  FUSE_SETLK = 32,
  FUSE_SETLKW = 33,
  FUSE_ACCESS = 34,
  FUSE_CREATE = 35,
  FUSE_INTERRUPT = 36,
  FUSE_BMAP = 37,
  FUSE_DESTROY = 38,
  FUSE_IOCTL = 39,
  FUSE_POLL = 40,
  FUSE_NOTIFY_REPLY = 41,
  FUSE_BATCH_FORGET = 42,
  FUSE_FALLOCATE = 43,
  FUSE_READDIRPLUS = 44,
  FUSE_RENAME2 = 45,
  FUSE_LSEEK = 46,
  FUSE_COPY_FILE_RANGE = 47,
  FUSE_SETUPMAPPING = 48,
  FUSE_REMOVEMAPPING = 49,
  FUSE_SYNCFS = 50,
  FUSE_TMPFILE = 51,
  FUSE_STATX = 52,
  CUSE_INIT = 4096,
  CUSE_INIT_BSWAP_RESERVED = 1048576,
  FUSE_INIT_BSWAP_RESERVED = 436207616,
};
struct fuse_in_header {
  uint32_t len;
  uint32_t opcode;
  uint64_t unique;
  uint64_t nodeid;
  uint32_t uid;
  uint32_t gid;
  uint32_t pid;
  uint32_t padding;
};
struct fuse_out_header {
  uint32_t len;
  uint32_t error;
  uint64_t unique;
};
struct syz_fuse_req_out {
  struct fuse_out_header* init;
  struct fuse_out_header* lseek;
  struct fuse_out_header* bmap;
  struct fuse_out_header* poll;
  struct fuse_out_header* getxattr;
  struct fuse_out_header* lk;
  struct fuse_out_header* statfs;
  struct fuse_out_header* write;
  struct fuse_out_header* read;
  struct fuse_out_header* open;
  struct fuse_out_header* attr;
  struct fuse_out_header* entry;
  struct fuse_out_header* dirent;
  struct fuse_out_header* direntplus;
  struct fuse_out_header* create_open;
  struct fuse_out_header* ioctl;
  struct fuse_out_header* statx;
};
static int fuse_send_response(int fd, const struct fuse_in_header* in_hdr,
                              struct fuse_out_header* out_hdr)
{
  if (!out_hdr) {
    return -1;
  }
  out_hdr->unique = in_hdr->unique;
  if (write(fd, out_hdr, out_hdr->len) == -1) {
    return -1;
  }
  return 0;
}
static volatile long syz_fuse_handle_req(volatile long a0, volatile long a1,
                                         volatile long a2, volatile long a3)
{
  struct syz_fuse_req_out* req_out = (struct syz_fuse_req_out*)a3;
  struct fuse_out_header* out_hdr = NULL;
  char* buf = (char*)a1;
  int buf_len = (int)a2;
  int fd = (int)a0;
  if (!req_out) {
    return -1;
  }
  if (buf_len < FUSE_MIN_READ_BUFFER) {
    return -1;
  }
  int ret = read(fd, buf, buf_len);
  if (ret == -1) {
    return -1;
  }
  if ((size_t)ret < sizeof(struct fuse_in_header)) {
    return -1;
  }
  const struct fuse_in_header* in_hdr = (const struct fuse_in_header*)buf;
  if (in_hdr->len > (uint32_t)ret) {
    return -1;
  }
  switch (in_hdr->opcode) {
  case FUSE_GETATTR:
  case FUSE_SETATTR:
    out_hdr = req_out->attr;
    break;
  case FUSE_LOOKUP:
  case FUSE_SYMLINK:
  case FUSE_LINK:
  case FUSE_MKNOD:
  case FUSE_MKDIR:
    out_hdr = req_out->entry;
    break;
  case FUSE_OPEN:
  case FUSE_OPENDIR:
    out_hdr = req_out->open;
    break;
  case FUSE_STATFS:
    out_hdr = req_out->statfs;
    break;
  case FUSE_RMDIR:
  case FUSE_RENAME:
  case FUSE_RENAME2:
  case FUSE_FALLOCATE:
  case FUSE_SETXATTR:
  case FUSE_REMOVEXATTR:
  case FUSE_FSYNCDIR:
  case FUSE_FSYNC:
  case FUSE_SETLKW:
  case FUSE_SETLK:
  case FUSE_ACCESS:
  case FUSE_FLUSH:
  case FUSE_RELEASE:
  case FUSE_RELEASEDIR:
  case FUSE_UNLINK:
  case FUSE_DESTROY:
    out_hdr = req_out->init;
    if (!out_hdr) {
      return -1;
    }
    out_hdr->len = sizeof(struct fuse_out_header);
    break;
  case FUSE_READ:
    out_hdr = req_out->read;
    break;
  case FUSE_READDIR:
    out_hdr = req_out->dirent;
    break;
  case FUSE_READDIRPLUS:
    out_hdr = req_out->direntplus;
    break;
  case FUSE_INIT:
    out_hdr = req_out->init;
    break;
  case FUSE_LSEEK:
    out_hdr = req_out->lseek;
    break;
  case FUSE_GETLK:
    out_hdr = req_out->lk;
    break;
  case FUSE_BMAP:
    out_hdr = req_out->bmap;
    break;
  case FUSE_POLL:
    out_hdr = req_out->poll;
    break;
  case FUSE_GETXATTR:
  case FUSE_LISTXATTR:
    out_hdr = req_out->getxattr;
    break;
  case FUSE_WRITE:
  case FUSE_COPY_FILE_RANGE:
    out_hdr = req_out->write;
    break;
  case FUSE_FORGET:
  case FUSE_BATCH_FORGET:
    return 0;
  case FUSE_CREATE:
    out_hdr = req_out->create_open;
    break;
  case FUSE_IOCTL:
    out_hdr = req_out->ioctl;
    break;
  case FUSE_STATX:
    out_hdr = req_out->statx;
    break;
  default:
    return -1;
  }
  return fuse_send_response(fd, in_hdr, out_hdr);
}

#define SWAP_FILE "./swap-file"
#define SWAP_FILE_SIZE (128 * 1000 * 1000)

static const char* setup_swap()
{
  swapoff(SWAP_FILE);
  unlink(SWAP_FILE);
  int fd = open(SWAP_FILE, O_CREAT | O_WRONLY | O_CLOEXEC, 0600);
  if (fd == -1)
    return "swap file open failed";
  fallocate(fd, FALLOC_FL_ZERO_RANGE, 0, SWAP_FILE_SIZE);
  close(fd);
  char cmdline[64];
  sprintf(cmdline, "mkswap %s", SWAP_FILE);
  if (runcmdline(cmdline))
    return "mkswap failed";
  if (swapon(SWAP_FILE, SWAP_FLAG_PREFER) == 1)
    return "swapon failed";
  return NULL;
}

static void execute_one(void);

#define WAIT_FLAGS __WALL

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

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

void execute_one(void)
{
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  syz_mount_image$ext4 arguments: [
  //    fs: ptr[in, buffer] {
  //      buffer: {65 78 74 34 00} (length 0x5)
  //    }
  //    dir: ptr[in, buffer] {
  //      buffer: {2e 2f 62 75 73 00} (length 0x6)
  //    }
  //    flags: mount_flags = 0x2000040 (8 bytes)
  //    opts: ptr[in, fs_options[ext4_options]] {
  //      fs_options[ext4_options] {
  //        elems: array[fs_opt_elem[ext4_options]] {
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              auto_da_alloc: buffer: {61 75 74 6f 5f 64 61 5f 61 6c 6c 6f
  //              63} (length 0xd)
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              jqfmt_vfsold: buffer: {6a 71 66 6d 74 3d 76 66 73 6f 6c 64}
  //              (length 0xc)
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              noquota: buffer: {6e 6f 71 75 6f 74 61} (length 0x7)
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              init_itable: buffer: {69 6e 69 74 5f 69 74 61 62 6c 65}
  //              (length 0xb)
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              stripe: fs_opt["stripe", fmt[hex, int32]] {
  //                name: buffer: {73 74 72 69 70 65} (length 0x6)
  //                eq: const = 0x3d (1 bytes)
  //                val: int32 = 0x79 (18 bytes)
  //              }
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              resgid: fs_opt["resgid", fmt[hex, gid]] {
  //                name: buffer: {72 65 73 67 69 64} (length 0x6)
  //                eq: const = 0x3d (1 bytes)
  //                val: gid (resource)
  //              }
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              data_err_ignore: buffer: {64 61 74 61 5f 65 72 72 3d 69 67 6e
  //              6f 72 65} (length 0xf)
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              init_itable: buffer: {69 6e 69 74 5f 69 74 61 62 6c 65}
  //              (length 0xb)
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              errors_continue: buffer: {65 72 72 6f 72 73 3d 63 6f 6e 74 69
  //              6e 75 65} (length 0xf)
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //        }
  //        common: array[fs_opt_elem[fs_options_common]] {
  //        }
  //        null: const = 0x0 (1 bytes)
  //      }
  //    }
  //    chdir: int8 = 0x1 (1 bytes)
  //    size: len = 0x4e7 (8 bytes)
  //    img: ptr[in, buffer] {
  //      buffer: (compressed buffer with length 0x4e7)
  //    }
  //  ]
  //  returns fd_dir
  NONFAILING(memcpy((void*)0x200000000080, "ext4\000", 5));
  NONFAILING(memcpy((void*)0x200000000140, "./bus\000", 6));
  NONFAILING(memcpy((void*)0x200000000480, "auto_da_alloc", 13));
  NONFAILING(*(uint8_t*)0x20000000048d = 0x2c);
  NONFAILING(memcpy((void*)0x20000000048e, "jqfmt=vfsold", 12));
  NONFAILING(*(uint8_t*)0x20000000049a = 0x2c);
  NONFAILING(memcpy((void*)0x20000000049b, "noquota", 7));
  NONFAILING(*(uint8_t*)0x2000000004a2 = 0x2c);
  NONFAILING(memcpy((void*)0x2000000004a3, "init_itable", 11));
  NONFAILING(*(uint8_t*)0x2000000004ae = 0x2c);
  NONFAILING(memcpy((void*)0x2000000004af, "stripe", 6));
  NONFAILING(*(uint8_t*)0x2000000004b5 = 0x3d);
  NONFAILING(sprintf((char*)0x2000000004b6, "0x%016llx", (long long)0x79));
  NONFAILING(*(uint8_t*)0x2000000004c8 = 0x2c);
  NONFAILING(memcpy((void*)0x2000000004c9, "resgid", 6));
  NONFAILING(*(uint8_t*)0x2000000004cf = 0x3d);
  NONFAILING(sprintf((char*)0x2000000004d0, "0x%016llx", (long long)0));
  NONFAILING(*(uint8_t*)0x2000000004e2 = 0x2c);
  NONFAILING(memcpy((void*)0x2000000004e3, "data_err=ignore", 15));
  NONFAILING(*(uint8_t*)0x2000000004f2 = 0x2c);
  NONFAILING(memcpy((void*)0x2000000004f3, "init_itable", 11));
  NONFAILING(*(uint8_t*)0x2000000004fe = 0x2c);
  NONFAILING(memcpy((void*)0x2000000004ff, "errors=continue", 15));
  NONFAILING(*(uint8_t*)0x20000000050e = 0x2c);
  NONFAILING(*(uint8_t*)0x20000000050f = 0);
  NONFAILING(memcpy(
      (void*)0x200000000540,
      "\x78\x9c\xec\xdd\xcf\x6b\x5c\x5b\x1d\x00\xf0\xef\xbd\xc9\xbc\xfe\xca\x33"
      "\xf3\xd4\xc5\xf3\x81\xef\x15\xad\xa4\x45\x3b\x93\x34\xb6\x0d\x2e\x6a\x05"
      "\xb1\xab\x82\xb5\xee\x6b\x4c\x26\x21\x64\x92\x09\x99\x49\xdb\x84\xa2\x29"
      "\xee\x15\x44\x54\x70\xe5\xca\x8d\xe0\x1f\x20\x48\xff\x04\x11\x0a\xba\x97"
      "\x2a\x8a\x68\xab\x0b\x17\xea\xc8\xcc\xdc\xa9\xcd\x38\x93\x04\x3a\x99\xdb"
      "\x97\x7c\x3e\x70\x7b\xcf\x3d\x67\x66\xbe\xdf\xd3\x32\xf7\xc7\xb9\xa7\x73"
      "\x03\x38\xb1\xce\x47\xc4\xcd\x88\x18\x8b\x88\x4b\x11\x31\x99\xd5\xa7\xd9"
      "\x72\xab\xd5\x7e\xa7\xf3\xba\x17\xcf\x1f\x2d\xb4\x96\x24\x9a\xcd\xbb\x7f"
      "\x4d\x22\xc9\xea\x22\x4e\xef\xf9\xcc\x73\x11\xb1\x1b\x9d\xda\xaf\xdd\x8a"
      "\xf8\x66\xf2\xff\x71\xeb\xdb\x3b\xab\xf3\xd5\x6a\x65\x33\xdb\x2e\x37\xd6"
      "\x36\xca\xf5\xed\x9d\xcb\x2b\x6b\xf3\xcb\x95\xe5\xca\xfa\xec\xec\xcc\xb5"
      "\xb9\xeb\x73\x57\xe7\xa6\x87\xd2\xcf\x62\x44\xdc\xf8\xf2\x1f\x7f\xf8\xbd"
      "\x9f\x7d\xe5\xc6\xaf\x3e\xf7\xe0\xf7\xf7\xfe\x7c\xf1\x5b\xad\xb4\x26\xb2"
      "\xf6\x4e\x3f\x86\xaf\xd3\xf5\xc2\x9e\xbf\xa1\xf1\x88\xd8\x3c\x8a\x60\x39"
      "\x18\xcb\xd6\x85\x01\xed\xdf\x1d\x1b\x61\x32\x00\x00\x1c\xa8\x75\x8e\xff"
      "\xd1\x88\xf8\x54\xfb\xfc\x7f\x32\xc6\xda\x67\xa7\x00\x00\x00\xc0\x71\xd2"
      "\xfc\xe2\x44\xfc\x2b\x89\x68\x02\x00\x00\x00\xc7\x56\xda\x9e\x03\x9b\xa4"
      "\xa5\x6c\x2e\xc0\x44\xa4\x69\xa9\xd4\x99\xc3\xfb\xf1\x38\x9b\x56\x6b\xf5"
      "\xc6\x67\x97\x6a\x5b\xeb\x8b\x9d\xb9\xb2\xc5\x28\xa4\x4b\x2b\xd5\xca\x74"
      "\x36\x57\xb8\x18\x85\xa4\xb5\x3d\x93\xcd\xb1\xed\x6e\x5f\xe9\xd9\x9e\x8d"
      "\x88\x77\x22\xe2\x07\x93\x67\xda\xdb\xa5\x85\x5a\x75\x31\xef\xc1\x0f\x00"
      "\x00\x00\x38\x21\xce\xf5\x5c\xff\xff\x63\xb2\x7d\xfd\x7f\x2a\xef\xbc\x00"
      "\x00\x00\x80\x21\x2b\xe6\x9d\x00\x00\x00\x00\x70\xe4\xf6\xbb\xfe\xff\xc8"
      "\x08\xf3\x00\x00\x00\x00\x8e\x8e\xfb\xff\x00\x00\x00\x70\xac\x7d\xf5\xf6"
      "\xed\xd6\xd2\xec\x3e\xff\x7a\xf1\xfe\xf6\xd6\x6a\xed\xfe\xe5\xc5\x4a\x7d"
      "\xb5\xb4\xb6\xb5\x50\x5a\xa8\x6d\x6e\x94\x96\x6b\xb5\xe5\xf6\x6f\xf6\xad"
      "\x1d\xf4\x79\xd5\x5a\x6d\xe3\xf3\xb1\xbe\xf5\xb0\xdc\xa8\xd4\x1b\xe5\xfa"
      "\xf6\xce\xbd\xb5\xda\xd6\x7a\xe3\xde\x4a\xcf\x43\xc2\x01\x00\x00\x80\x91"
      "\x79\xe7\x83\x27\xbf\x4b\x22\x62\xf7\x0b\x67\xda\x4b\xcb\x5b\x87\x7f\xfb"
      "\xdb\x47\x97\x19\x70\xd4\x92\x03\xda\xdb\x0f\x09\x79\x96\x6d\xfc\x61\x04"
      "\x09\x01\x23\x33\x96\x77\x02\x40\x6e\xc6\xf3\x4e\x00\xc8\x4d\x21\xef\x04"
      "\x80\xdc\x1d\x34\x0e\x30\x70\xf2\xce\xaf\x87\x9f\x0b\x00\x00\x70\x34\xa6"
      "\x3e\x31\xf8\xfe\xbf\xb1\x01\x38\xde\xd2\x81\x2d\xcd\x91\xe6\x01\x00\x8c"
      "\x8e\xfb\xff\x70\x72\x15\xf6\xce\x00\xbc\x9a\x5f\x26\x40\x5e\x0e\x7a\xcc"
      "\xc7\xeb\xdc\xff\xef\x8c\x24\x34\x0d\x28\x00\x00\x40\xce\x26\xda\x4b\x92"
      "\x96\xb2\x7b\x81\x13\x91\xa6\xa5\x52\xe7\x3f\xf6\x17\xa3\x90\x2c\xad\x54"
      "\x2b\xd3\xd9\xf5\xc1\x6f\x27\x0b\xa7\x5a\xdb\x33\xed\x77\x26\x07\xce\x19"
      "\x06\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x3a\x9a\xcd\x24\x9a\x00\x00\x00\xc0\xb1\x16\x91\xfe\x29\x69\xff"
      "\x9a\x7f\xc4\xd4\xe4\x85\x89\xde\xf1\x81\xb7\x92\x7f\x4e\xb6\xd7\x11\xf1"
      "\xe0\x27\x77\x7f\xf4\x70\xbe\xd1\xd8\x9c\x69\xd5\xff\xed\x65\x7d\xe3\xc7"
      "\x59\xfd\x95\x3c\x46\x30\x00\x00\x00\x80\x5e\xdd\xeb\xf4\xee\x75\x3c\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x0c\xd3\x8b\xe7\x8f\x16\xba\xcb\x28\xe3\xfe\xe5\x4b\x11\x51\xec\x1b\xff"
      "\x83\xd3\xed\xd5\xe9\x28\x44\xc4\xd9\xbf\x27\x31\xfe\xca\xfb\x92\x88\x18"
      "\x1b\x42\xfc\xdd\xc7\x11\xf1\x6e\xbf\xf8\x49\x2b\xad\x28\x46\x27\x8b\x7e"
      "\xf1\xcf\xe4\x18\x3f\x8d\x88\x73\x43\x88\x0f\x27\xd9\x93\xd6\xfe\xe7\x66"
      "\xbf\xef\x5f\x1a\xe7\xdb\xeb\xfe\xdf\xbf\xf1\x6c\x79\x5d\x83\xf7\x7f\x69"
      "\x74\xf7\x7f\x63\x03\xf6\x3f\x6f\x1f\x32\xc6\x7b\x4f\x7f\x51\x1e\x18\xff"
      "\x71\xc4\x7b\xe3\xfd\xf7\x3f\xdd\xf8\xc9\x80\xf8\x9f\x3e\x64\xfc\x6f\x7c"
      "\x7d\x67\xa7\xa7\xea\xdb\xdd\x42\xf3\xa7\x11\x53\x7d\x8f\x3f\xc9\x9e\x58"
      "\xe5\xc6\xda\x46\xb9\xbe\xbd\x73\x79\x65\x6d\x7e\xb9\xb2\x5c\x59\x9f\x9d"
      "\x9d\xb9\x36\x77\x7d\xee\xea\xdc\x74\x79\x69\xa5\x5a\xc9\xfe\xec\x1b\xff"
      "\xfb\x9f\xfc\xe5\x7f\xf6\xeb\xff\xd9\x01\xf1\x8b\x07\xf4\xff\xc2\x21\xfb"
      "\xff\xef\xa7\x0f\x9f\x7f\xac\x53\x2c\xf4\xb6\x75\x2b\xfa\x1d\x7f\xdf\x1d"
      "\x10\x3f\xcd\x8e\x7d\x9f\xc9\xca\xad\xf6\xa9\x6e\x79\xb7\x53\x7e\xd5\xfb"
      "\x3f\xff\xcd\xfb\xfb\xf5\x7f\x71\x40\xff\x5f\xfe\xfb\xf7\x39\xd0\xb6\x62"
      "\x5e\x3c\x64\xff\x2f\xdd\xf9\xce\xb3\x43\xbe\x14\x00\x18\x81\xfa\xf6\xce"
      "\xea\x7c\xb5\x5a\xd9\xfc\x30\x16\xd2\x78\x23\xd2\x50\x18\x4a\xe1\xd4\x9b"
      "\x91\xc6\x3e\x85\x42\xbc\x11\x69\x8c\xa6\x90\xf7\x9e\x09\x00\x00\x18\xb6"
      "\xff\x9d\xf4\xe7\x9d\x09\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x9c\x5c\xa3\xf8\x39\xb1\xde\x98\xbb\xf9\x74\x15\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x60\x5f\xff\x0d\x00\x00\xff\xff\x27\x2d\xd9\x9e",
      1255));
  NONFAILING(syz_mount_image(/*fs=*/0x200000000080, /*dir=*/0x200000000140,
                             /*flags=MS_LAZYTIME|MS_MANDLOCK*/ 0x2000040,
                             /*opts=*/0x200000000480, /*chdir=*/1,
                             /*size=*/0x4e7, /*img=*/0x200000000540));
  //  open arguments: [
  //    file: ptr[in, buffer] {
  //      buffer: {2e 2f 62 75 73 00} (length 0x6)
  //    }
  //    flags: open_flags = 0x14927e (8 bytes)
  //    mode: open_mode = 0x0 (8 bytes)
  //  ]
  //  returns fd
  NONFAILING(memcpy((void*)0x200000000180, "./bus\000", 6));
  res =
      syscall(__NR_open, /*file=*/0x200000000180ul,
              /*flags=O_TRUNC|O_SYNC|O_NOATIME|O_LARGEFILE|O_CREAT|O_RDWR|0x3c*/
              0x14927eul, /*mode=*/0ul);
  if (res != -1)
    r[0] = res;
  //  fallocate arguments: [
  //    fd: fd (resource)
  //    mode: fallocate_mode = 0x0 (8 bytes)
  //    off: intptr = 0x0 (8 bytes)
  //    len: intptr = 0x1000f4 (8 bytes)
  //  ]
  syscall(__NR_fallocate, /*fd=*/r[0], /*mode=*/0ul, /*off=*/0ul,
          /*len=*/0x1000f4ul);
  //  open arguments: [
  //    file: ptr[in, buffer] {
  //      buffer: {2e 2f 62 75 73 00} (length 0x6)
  //    }
  //    flags: open_flags = 0x14507e (8 bytes)
  //    mode: open_mode = 0x0 (8 bytes)
  //  ]
  //  returns fd
  NONFAILING(memcpy((void*)0x200000000780, "./bus\000", 6));
  res = syscall(
      __NR_open, /*file=*/0x200000000780ul,
      /*flags=O_SYNC|O_NOATIME|O_DIRECT|O_CREAT|O_RDWR|0x3c*/ 0x14507eul,
      /*mode=*/0ul);
  if (res != -1)
    r[1] = res;
  //  mmap arguments: [
  //    addr: VMA[0x600000]
  //    len: len = 0x600000 (8 bytes)
  //    prot: mmap_prot = 0x90e976db910956fe (8 bytes)
  //    flags: mmap_flags = 0x4002011 (8 bytes)
  //    fd: fd (resource)
  //    offset: intptr = 0x0 (8 bytes)
  //  ]
  syscall(
      __NR_mmap, /*addr=*/0x200000000000ul, /*len=*/0x600000ul,
      /*prot=PROT_GROWSDOWN|PROT_SEM|PROT_WRITE|PROT_EXEC|0x90e976db900956f0*/
      0x90e976db910956feul,
      /*flags=MAP_UNINITIALIZED|MAP_LOCKED|MAP_FIXED|MAP_SHARED*/ 0x4002011ul,
      /*fd=*/r[1], /*offset=*/0ul);
  //  mount arguments: [
  //    src: ptr[in, blockdev_filename] {
  //      union blockdev_filename {
  //        loop: loop_filename {
  //          prefix: buffer: {2f 64 65 76 2f 6c 6f 6f 70} (length 0x9)
  //          id: proc = 0x0 (1 bytes)
  //          z: const = 0x0 (1 bytes)
  //        }
  //      }
  //    }
  //    dst: ptr[in, buffer] {
  //      buffer: {2e 2f 62 75 73 00} (length 0x6)
  //    }
  //    type: nil
  //    flags: mount_flags = 0x1000 (8 bytes)
  //    data: nil
  //  ]
  NONFAILING(memcpy((void*)0x200000000380, "/dev/loop", 9));
  NONFAILING(*(uint8_t*)0x200000000389 = 0x30);
  NONFAILING(*(uint8_t*)0x20000000038a = 0);
  NONFAILING(memcpy((void*)0x200000000140, "./bus\000", 6));
  syscall(__NR_mount, /*src=*/0x200000000380ul, /*dst=*/0x200000000140ul,
          /*type=*/0ul, /*flags=MS_BIND*/ 0x1000ul, /*data=*/0ul);
  //  syz_fuse_handle_req arguments: [
  //    fd: fd_fuse (resource)
  //    buf: ptr[in, buffer] {
  //      buffer: {22 f8 ea 77 e0 c8 70 aa ee 3b de 9b e8 4b ff fa 3e ab e4 0a
  //      0d 0f 24 3a e4 4c 67 07 a1 24 b1 90 7b f3 ec 0e 19 1a 6c 2e c0 5d 77
  //      f6 54 08 31 4b 75 16 c3 74 e9 8d c1 03 55 5f 98 e6 9e 16 ec 70 99 c9
  //      b0 7d bd e1 94 4d 85 79 bd b3 72 25 0b bd 3b 97 d3 70 82 a2 b8 d8 7b
  //      f8 f1 7d 51 fc 4f e3 7b eb 31 e7 11 9a 0e 28 f7 3e 10 15 61 2e ea 09
  //      69 50 86 13 b1 c1 94 fc 6d bf ba 55 c8 4e 52 99 f9 f5 a2 8b 57 b6 a7
  //      cc 90 60 08 4a 40 6d a2 78 b6 f8 75 8d 22 b9 1c e1 76 26 f6 5a 36 13
  //      d7 8b f6 35 53 3b 96 8d 24 9f 4a d0 ef 1e 94 44 03 5e 5a cf 8f d2 48
  //      33 9e 6e a6 b4 ae f3 18 65 20 9f f4 a6 4a f4 7c 42 88 79 7e 43 03 f1
  //      4e dc 61 b1 e3 ef 07 ad 84 28 cf bb 44 53 bb 29 db b2 cf 34 3c 8b 0e
  //      0b ca f1 8c b1 ff 71 57 41 8a 90 6b e6 a0 e7 b2 7a 59 82 e3 d2 7f 4c
  //      15 db 81 95 66 f9 46 07 97 b2 b1 64 c5 e0 0c 94 22 f8 30 4c b7 5c 44
  //      a9 13 50 69 dc 57 37 6a 4b cf c5 48 09 6c 4e 00 04 09 cd b9 4f c6 bd
  //      6b 33 fa 9a c8 e4 8f 13 57 96 a9 6f 11 11 1a fe 1e e9 9e b6 70 4a 49
  //      32 65 3d fb 1e 13 a4 0b 76 18 71 fb 26 0f 1f cf 88 15 d3 79 12 45 5c
  //      c3 a9 7d a9 59 de c3 a7 f9 3b d2 82 94 d2 fe aa 74 cf 48 08 3c 85 e6
  //      1c 30 64 8f 5b 7c 80 4e 3c 77 6b 9a 49 b9 50 28 75 43 e1 16 e9 13 b5
  //      39 2b 91 db 78 45 ab 4f d9 91 d6 06 10 f7 05 c8 2c 47 37 d7 04 8e 6b
  //      d4 4f 47 f5 6d 07 55 40 6a 51 b4 6e d1 cd 51 b3 6a 39 a7 d1 f1 da 14
  //      1d 5b 9a bf ca 02 06 76 85 61 5f 5b 44 c7 80 ef 68 55 76 f0 92 72 82
  //      04 b8 85 f8 ba d0 5c 89 87 64 4d 18 a5 4a 0d aa db 3f 5f 4f 54 d6 1a
  //      57 71 9e dc b4 ed 4c c2 c3 9c 9a 66 1e 62 e2 d3 5a 5b 47 11 63 69 0c
  //      65 a2 d1 5a d5 47 ad 31 d4 5b 8a c8 4c cc df bf 99 b1 31 46 e6 42 d4
  //      c8 40 f4 25 0e 88 24 86 f3 38 2c 5d 37 4a f1 26 26 82 9d 42 3d 5e c6
  //      9a e1 80 a4 11 4e d4 f5 89 97 4c 7c 64 28 96 6c 3f fb e7 85 d4 52 c9
  //      30 0a 5d 61 4e da 84 98 34 0f eb e5 20 73 2a a1 57 e3 97 18 bb 98 40
  //      34 14 9d 11 78 7d 8e bf 68 59 62 5e f1 80 ff 4b 5a da b6 07 b1 e5 5c
  //      44 41 2a c2 a2 38 e6 b6 8d a1 e2 22 e4 58 1c b0 0f dd aa 97 ad ab 57
  //      7b 69 96 9a ba 6b 38 c9 12 40 0d 59 59 c1 b9 f8 d9 5e fd 43 fa 2f e6
  //      3a 11 2b 49 65 c5 02 70 d0 c1 74 c2 aa c0 94 bd 51 c1 42 de fa 5b 04
  //      31 04 db c5 c2 0d 09 8c e9 c9 bf cf 04 67 88 8a 4c dc 0c fc 2e f6 a8
  //      e8 c2 41 17 8b e7 90 49 64 ad 18 07 02 19 16 0b ec 00 32 3c 59 81 d4
  //      4a 53 ca 52 2c 13 bb 03 bf 72 db 6e b2 26 7f cd f2 cc 8d 13 cc ff c0
  //      95 d1 ce c3 e8 b9 f6 d1 7a f5 ee d8 09 ad 96 de 9e 88 08 56 35 92 f0
  //      ef 19 4b 0c 8c a4 eb 5d 11 7f 6b 4d 66 4d 5f 25 5f 4b 62 73 bc e7 3e
  //      1a 8b cb ad 00 71 7c 2f 4f 85 27 53 d7 0a 72 a4 f0 c1 86 96 55 25 d4
  //      60 3b 29 87 c4 bd d3 d7 8a 6f f3 87 f9 f1 fb 58 dd 16 dc 5a 9b f0 fe
  //      49 00 55 de 1b 17 e2 6a 31 35 4f ac 37 be dc de 20 53 4b f2 98 d9 7d
  //      1e 0d a0 86 f0 b5 10 bf a2 9a 94 50 b4 36 32 ed 71 fd b4 21 8d 4b 96
  //      11 a2 3c ef 84 46 f0 a8 df 50 8b 16 4b d8 c2 39 ab 04 42 00 eb 7a a7
  //      b5 b9 89 22 67 c8 b0 58 a2 8c 26 f6 f4 f8 71 a2 4e 70 47 57 35 37 3a
  //      68 35 4d 17 43 4a d3 ba 1f 6d 6a 11 67 ab 9f 06 85 f3 96 d7 b4 98 ad
  //      c4 6d 81 d8 d5 f2 06 45 b5 20 97 ed 1a a8 59 8c 4a 6b 6e 14 83 0b fb
  //      67 b3 5c d4 2b 7a 96 2c bc 3b 44 a8 e6 65 45 dd 8c 32 13 ab 50 63 c1
  //      58 f5 40 02 3b 97 76 6a da 87 75 c6 c3 5f d4 e3 53 37 50 75 03 a2 9c
  //      15 9b 24 30 79 4b e7 c9 ed 26 09 31 9e 69 8b 0f cd bb f4 4f 4a 5d 12
  //      8c 7b 0c 41 d4 01 12 de cf 6a 06 e5 1d 19 1c bf fd 44 4b 8b 32 31 15
  //      bb ab 4d bc 8f 9f da fd 6d 2f 7b 10 80 a4 ae d3 58 18 c2 6f c7 5a 8c
  //      6a 98 18 2e 1f 9b d3 5c 94 5e 94 cd b3 b2 5d 89 8b 70 4c 89 11 4d 22
  //      bd da b1 94 9c 78 1b 91 80 ff fe d0 04 2e db 70 78 8c 12 a9 7c 44 ea
  //      78 16 db 92 5c e4 d7 f2 17 4e 18 b3 92 83 4c 89 17 16 e2 e2 8d 07 64
  //      86 f1 86 eb 8f 65 24 de e0 7c e2 20 9b f9 df c6 98 1f 8a 93 9a d9 fd
  //      4c 09 20 94 f0 bb 48 bf 37 28 0c 0e b3 c7 ee d5 17 9e 90 9c c6 26 ce
  //      17 8f a4 ad 70 26 1f 50 6e ac ec ca c8 27 2b 7c 8e 41 39 8f e6 52 d9
  //      f4 86 02 e4 ef 4d ce 43 44 96 11 ef 27 05 d6 a6 dd 95 4c 09 c0 0d 1e
  //      8d 24 54 f4 29 ff 36 73 8f 20 76 70 27 f1 f7 15 1b 21 24 35 1a 9f 01
  //      96 f8 e8 38 ad b8 82 d0 cb f4 63 af a9 15 44 5a 02 ed 6c 5b e4 a0 8c
  //      b8 03 98 c4 d5 e9 55 00 da 86 2b cc 26 58 a2 85 99 af 0a 2b 93 7e 26
  //      58 df ee 12 10 0c c4 88 ba 67 6c e6 12 29 57 07 8f f2 a3 f1 2a 5d 74
  //      3b 5c 91 a6 8b 80 fc 7a d1 16 75 7d 97 40 d2 b9 40 41 4f 7a 43 a1 c5
  //      c5 fe 3a 5b 65 eb 94 26 bd a3 cc a9 95 17 15 37 e6 23 cc 8d 0a 41 ff
  //      f3 c1 d8 67 f4 f4 bc e5 0f 1e ba a7 1e 79 fd 8e d9 cb ca 12 cb ed e5
  //      04 01 d5 98 79 ad a3 3d 87 f2 bf 76 11 dc d4 b5 b9 18 76 57 0d ea 77
  //      e6 e8 43 3a ba 3a 18 d3 1e e4 fa 35 a4 b3 37 6c fe cc 0e 4c f9 40 de
  //      70 cf db 9b 0b 29 c1 e6 8b d2 d5 8e 5b 07 53 a1 5b 69 c1 63 68 43 db
  //      e0 5e 98 1d 05 8f 39 37 60 da ca 68 6c 12 88 2a 38 c5 a2 65 0b d1 da
  //      a6 29 f8 d2 85 44 81 8c 97 dc be 60 c8 45 5e fd 62 62 9a 44 84 18 4c
  //      65 cb 4e a6 bb e7 56 ad ab 8f 27 45 2d 5f 6b f7 ef 39 0d 6b a8 60 93
  //      d8 b3 3d 75 67 a3 a8 fb 5d 6d 82 c6 33 d7 df 72 a0 99 c1 24 a5 1e 40
  //      1d 62 34 c0 6e ee 0a 37 c8 8e 0c ff 59 c5 29 a0 57 50 b9 6a 00 c5 53
  //      57 ee 98 f6 9b 65 b8 d0 a7 6a 1e 98 0a ca 89 19 5b 04 e5 e9 02 1f f0
  //      7a 6e d3 33 cb 46 19 18 19 ac dc f6 e9 b9 8c 36 43 30 c8 cf f6 9c a3
  //      e7 75 b8 4f 1b 0d ee 29 bc 22 93 21 79 ba 25 de 6b da ac 05 d9 df f2
  //      84 b3 f1 00 31 9b 51 eb bd d9 24 4b 4b 68 6b a4 10 39 1d 61 15 81 7a
  //      47 4d 05 bc 00 f7 b9 19 02 7b 74 ec e4 d8 b3 4a b4 a2 49 0c b3 9b f6
  //      98 44 c6 88 1f a7 f6 47 57 62 8e e8 00 9a 44 2a de 79 3f dd 41 d3 09
  //      76 7b a2 4d f8 35 4e 19 79 d4 1e 2f 34 b8 4e 99 55 7f 91 f4 93 f0 1c
  //      69 8e a7 4f 1a 42 67 d1 cc f2 03 0e 15 c8 2b c7 43 eb 4e bd c6 c4 f1
  //      b2 4c dd a0 16 2a 76 98 5d 15 4e 7f 91 52 1d e2 04 bc 41 59 74 7f 16
  //      95 90 fe f4 3e 48 56 4e 14 45 ee 10 a5 60 60 2c bc 16 0c 80 a2 7c 65
  //      a1 e3 31 e9 34 ed 53 d4 a0 28 5e e1 56 90 e6 8f 67 ea b4 51 0d 89 3a
  //      96 15 cc a0 83 d1 4e 1a 1d e7 e9 7d 95 80 50 f0 de 8f e6 c9 c8 15 8a
  //      ee b1 80 da f5 dd 84 be 99 a1 c3 71 51 08 bc 67 ba cd 14 54 2a 17 e9
  //      78 26 48 07 84 75 90 7d 82 a2 bd 25 fb 18 1a 1d cf d1 23 cf b4 9b 11
  //      f2 a0 a6 9d 33 e7 b5 11 47 d1 99 14 f1 7c e6 70 8e 93 47 5f 6a c5 1b
  //      58 39 2a 43 8e ae 03 82 bf 86 c5 fc 4b 9b b9 19 dc e6 98 ef c5 e4 46
  //      8e b9 38 fa 69 7c be 16 b2 aa d7 ee a6 19 8d de 32 71 3f c2 41 da de
  //      9d 57 8d 19 14 e4 6d d0 e7 f4 5c 1d 92 d2 6e fc c3 50 f2 c4 1d 99 1c
  //      4b 87 0e 1a e4 8b 9f 0c 15 39 b9 23 31 cf 2d 35 32 1b e3 db df a0 83
  //      24 d0 fc 7f 48 24 00 ee 86 fc b0 6e 02 fe 25 66 90 e5 a9 ec e7 f0 91
  //      d8 82 28 43 a6 aa 0e 8f 5d 01 21 f9 7d 0f e5 02 3f 00 52 eb 24 ec 06
  //      48 df a4 c0 0f 77 ad 31 ec 85 be f9 49 c1 a6 45 b8 02 56 2f 09 50 43
  //      71 5f 25 19 77 05 33 30 bc fd ba df 62 ed 2f 35 dd a4 66 f8 f7 de 12
  //      fe 80 33 b1 b4 62 6b 01 ca fb 4c 9e 97 9a 76 3d 77 73 a5 b1 33 df e0
  //      45 ed cd be cb 05 49 23 05 29 bc fa dd 21 70 bc 4f 87 84 6b 3e 59 20
  //      e6 f7 15 2a 3e a6 48 db 65 18 7b 4f de 3e bf 2d 06 7c 29 1d f1 fa 6c
  //      c7 d4 3e 06 cb b2 d2 5f 67 48 6b 7f 66 29 f9 00 2f 12 2f 3a f0 43 f5
  //      cc a8 0a 07 68 a9 89 e5 ed c5 09 8d 4c a8 2c b1 08 df 90 23 84 a3 f1
  //      87 a0 c0 ef df 82 a1 73 91 8d 8e 45 2e 4e 7e 2d eb fd fc 71 bf d0 47
  //      3f f2 50 47 7c ed ce 3b 0f 16 85 60 fd f4 eb 43 af da 72 41 97 d2 77
  //      85 89 9b d8 29 76 4e 3b 9d 79 1c 32 f1 32 12 9c f5 e1 1c f8 11 b5 d4
  //      33 93 d8 a2 38 92 b0 4c 64 9b 42 ec ee af 8c 9f 33 3e 53 20 c1 83 c2
  //      88 d1 88 88 ce 3a 43 f5 03 f3 8a 88 50 37 35 a0 05 9d c0 24 77 14 5c
  //      0e a8 cd 2d c3 e0 19 ae 15 b3 50 4d 95 d2 44 bd 01 d6 42 47 80 74 ed
  //      44 3e 49 1e 7e 79 c4 7f d0 14 39 0c d5 f4 ce dd 91 54 f3 60 7e 12 86
  //      cf 96 66 28 42 23 6f cc b5 2c 2a 75 32 b5 bc fc ff 48 24 ce 56 92 2d
  //      1f f8 c1 60 2f 86 cc 38 5f 7f 05 a2 a6 84 74 d8 40 de 81 7e c8 4e a6
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  //      16 1e 6d b1 be 5d 16 32 30 ce 22 58 27 94 38 b2 cb 71 61 e3 8c 5e 96
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  //      b9 44 3d 1e 1e 23 22 1c d9 7e de 71 7c 8a d0 23 04 e9 1e da a6 d9 da
  //      90 3a c3 fc 69 38 70 49 e3 a2 39 3a 65 4f 90 0a 7d 42 c5 63 ae c0 36
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  //      b5 fc f8 fb 36 43 b1 21 06 55 47 9c bb 17 f4 5b 38 61 3d ce 8c eb 18
  //      4c 8c 9c bc 7f 61 d3 a5 76 6c 0d c6 04 74 e8 d6 a2 ca c5 f7 85 ad 29
  //      d6 8f f5 92 a8 c4 c2 15 38 ff 0f 5c 78 62 47 b8 5d 39 f7 3f 99 ae b9
  //      22 8f 51 2a c4 aa 9a b7 a4 33 99 68 ed a1 4a 9b a4 36 f3 d1 d5 db 08
  //      62 16 a8 b4 71 5c eb b9 33 58 ae 80 29 53 42 43 7a 85 5f db b5 00 00
  //      2f 7b ff 57 4f f6 bd 4d e9 1a e5 f4 4a 8d d9 1c a9 75 f3 57 a7 a1 52
  //      fb 65 8e cd c8 95 96} (length 0x2000)
  //    }
  //    len: bytesize = 0x2000 (8 bytes)
  //    res: nil
  //  ]
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      "\xab\xeb\x0e\x8b\x58\xde\x82\x28\xb9\x2b\x78\x09\x71\x78\xed\x88\xb2\xf1"
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      "\x39\xd6\xbb\xb0\xae\xb9\xfb\x97\xb1\x53\xeb\xa5\x74\x9d\x19\xfc\xc1\x10"
      "\x34\x27\x33\x09\x4d\x5c\x8d\x82\xb7\xe1\xc4\x6f\xe5\xc1\xa7\x23\xe7\xcf"
      "\x2a\x35\x96\xec\x49\x94\x82\x91\xd4\x77\x4b\xf9\xdd\xbd\xbf\x7a\x26\x1b"
      "\x88\x04\x47\xd3\xca\xb3\x2f\x7b\x05\x5c\xd4\x17\x14\x2a\xcd\x22\x40\xbb"
      "\xa2\xd7\xfe\x3f\x00\x3d\x3a\x78\x96\x02\x67\x3b\xc3\x4f\xa8\x4c\x40\x10"
      "\x1f\xb8\x0a\x4c\x23\xde\x6f\x68\x9f\x13\x01\x4e\x78\xcc\x21\xd1\xb5\x8f"
      "\x2e\x83\x8a\x00\xf1\x67\x9e\x5c\xee\x78\x48\x98\xc5\xc2\x5b\xe9\x94\x95"
      "\x09\x86\x2d\x70\xb5\x38\xf0\xfe\x38\x23\x25\xef\x77\xb5\x05\x37\xdd\x32"
      "\xd3\xda\x5c\x41\xd2\x06\xf9\x46\xd7\xf1\xf8\x6f\x5f\x86\xf4\x1f\x39\xdc"
      "\x21\x6e\xdf\x78\x69\xfa\x2f\x4b\x1d\x53\x4c\x7c\xfb\x29\x6b\x2c\x5d\x32"
      "\x3e\x43\x57\xc0\x40\x0f\xdd\xf4\x57\x1e\x8a\xd3\xb6\x3c\x94\x10\xec\x3f"
      "\x6a\xd6\xc0\x4e\xd5\x99\xbc\x60\xf0\x4d\x4c\x0e\x95\x6b\xab\x7c\xb0\xff"
      "\x1c\x32\x42\x15\x29\x19\x95\x2f\x57\xbf\x32\x41\x38\x91\x52\x15\x02\x69"
      "\x21\xf3\x4c\x19\x7a\x07\x6c\x62\xee\x70\xba\x3b\x04\xf7\x3d\x4f\xa9\x1b"
      "\xf7\x21\xa3\x89\x2f\xd5\x2a\xd2\x04\x5d\x8b\xac\xb0\x06\x04\xd2\xfb\xda"
      "\xc0\x92\x68\x79\x4e\xdb\x92\x93\xf9\x96\x5e\x74\xc2\x83\x7a\xf8\x89\xde"
      "\x27\x46\x66\x1b\x14\x15\xeb\x0f\x2c\x72\x29\xe5\x91\x62\x8b\x42\x7d\xdd"
      "\x3c\x8f\xc6\xf5\xf5\x97\xa7\xb1\xf2\xa0\x3f\x96\x57\x44\x45\x0d\x40\x67"
      "\xb7\xeb\x5b\x54\xdd\xc2\xb2\xbf\xf2\x22\x21\xb7\x3b\xd9\x14\x35\xdb\xe9"
      "\x08\x4f\x88\x1b\xc1\x27\x16\x5b\xc4\x42\x3e\x88\xfb\x55\x33\x4b\xa2\x50"
      "\xff\xd1\x50\x2a\xa4\x86\x52\xce\x5d\x05\x4e\x1c\xe1\x4c\x2c\x8c\x8a\xf8"
      "\x37\xff\xb2\x3c\x17\x28\x2f\xa5\x9b\xae\x4d\xf6\x06\xf3\x3a\x5d\xb2\xbc"
      "\x38\x8a\x2a\x62\xcb\x30\xb0\x8c\xf0\x75\x86\xa4\xf8\xc8\xc6\x20\x9f\x22"
      "\x5f\xe0\xb3\x0d\x7b\xde\x2a\xb8\xd7\xbe\x90\x49\x47\x3b\x9e\xfe\x4e\x45"
      "\xad\x43\x22\xce\xde\x4b\x1f\x31\xb0\x0c\x24\x6f\xca\x13\x2e\x60\x61\x16"
      "\x51\x8c\x37\x76\xbb\x87\xa4\x60\xd3\x61\x86\xef\x55\xac\x77\x2d\x04\x54"
      "\x07\x89\x03\x52\x42\xec\xc5\x32\x4d\x18\x45\xf9\x13\x2a\x08\xdd\xda\xff"
      "\x09\x40\xe0\x0b\x97\x70\x1f\xf1\xdc\x42\x4b\x42\xdf\xe4\xac\x37\x01\x82"
      "\x04\x04\xdb\x18\x3c\x89\x60\x44\x03\xb1\x4e\x1b\x3f\x25\x4c\x20\xe3\xfa"
      "\x40\xee\x8d\x86\x84\xee\x3c\xee\xfc\x4e\x92\x09\x11\x65\x5e\x4a\xcd\xbc"
      "\x3b\x7d\x2b\xb0\xe1\x24\x0e\x49\x6b\x96\x57\xf2\xc4\xcd\x71\x85\x82\x0f"
      "\x7c\x46\x8e\xdd\xcf\x40\xad\xaa\x02\xb7\x49\xb4\x63\xd8\x3d\x21\xe2\x17"
      "\xcd\x90\x6f\x4a\x91\x5b\x4a\x46\x42\x06\x30\xd4\xbc\xb8\xcf\x28\x10\xef"
      "\x41\xf9\x46\xe8\xbc\xc9\x55\x35\x05\xd7\x0f\x10\x82\x5a\x8e\xf7\x89\xc2"
      "\xee\xd7\x80\xba\xa2\x74\xc0\x36\xc4\x2f\x58\x86\x52\x73\xaf\x2e\x5f\x81"
      "\xa8\x2f\xd2\xb7\xb3\x15\x99\x89\x48\xfa\xf1\x45\xd4\x79\x52\x77\x38\x76"
      "\x21\x0c\x89\x0c\x77\xfe\x36\xf4\xe5\xee\x1f\xc2\xc9\xd6\xfb\x4e\xc6\x04"
      "\x11\xe1\x37\x3d\xe7\xff\x7a\xdf\x5a\x7d\xaf\x30\x31\x29\x7b\xf7\x08\xc7"
      "\x5e\xda\x9a\xf6\xe3\x1b\x49\x3e\x2e\xd3\x04\x17\xce\xb0\x02\x52\x88\xc2"
      "\xdd\xbd\xad\x4c\x56\x24\x1d\x57\x18\x41\x03\x65\x9c\x53\xf3\x55\x13\x20"
      "\xc8\x00\x73\x3f\x05\x80\x0f\x80\x49\x00\x49\x67\xf6\x90\x76\x83\x1c\x2d"
      "\x65\xf4\x52\x3f\xac\x28\x42\xb9\xa2\xcb\x69\x2b\x4b\x18\xd4\x6f\x6c\xda"
      "\xe3\xd4\x45\xe1\x32\xd8\x7b\xf7\xf7\x14\x11\x16\x1e\x6d\xb1\xbe\x5d\x16"
      "\x32\x30\xce\x22\x58\x27\x94\x38\xb2\xcb\x71\x61\xe3\x8c\x5e\x96\xe5\x8d"
      "\x30\xc1\xee\x97\x0d\x18\x59\x3a\x2b\xd1\xff\xe9\x8d\xfd\xe0\xd2\xb3\x34"
      "\xe4\x89\x1c\x2c\xca\x77\xbf\x77\x8f\xb9\xc5\x1b\x96\x74\x24\x06\xe2\x9a"
      "\x9f\x17\x3f\xd4\x05\xc1\x1f\x07\xd2\xff\xc0\x04\x21\x6a\xa7\xaf\xf2\xb8"
      "\x28\x4f\x79\xbc\x01\x29\x86\x95\x53\x87\x95\xeb\x22\x27\xf5\x5f\x42\xfe"
      "\xfd\x3b\xc1\x45\x57\xd2\x95\x6c\xcf\x5a\x08\x00\xb2\xcf\xa3\xeb\xd4\xdd"
      "\xd2\x1b\x55\xe8\x6d\xde\x2f\x65\xf7\x3b\x2e\x4e\x0e\x7f\xcc\xb8\x8e\xc4"
      "\x44\x4b\x90\xd4\xa2\xfc\x9c\x44\x77\x24\xcc\xc6\xd7\x2d\xd5\x9a\x6e\x47"
      "\x0e\xdf\x27\x13\xad\xc9\xa3\xce\x42\x7b\x02\x26\x56\xd6\xad\x25\x2a\xd8"
      "\x11\x78\xc4\x03\x04\x59\xf5\x22\xd8\x8e\x14\x35\x67\xb8\x80\xb9\x44\x3d"
      "\x1e\x1e\x23\x22\x1c\xd9\x7e\xde\x71\x7c\x8a\xd0\x23\x04\xe9\x1e\xda\xa6"
      "\xd9\xda\x90\x3a\xc3\xfc\x69\x38\x70\x49\xe3\xa2\x39\x3a\x65\x4f\x90\x0a"
      "\x7d\x42\xc5\x63\xae\xc0\x36\x0c\x73\x49\xde\xfb\xbc\x81\xf2\x20\xf2\x41"
      "\xb3\xcd\xba\x55\x6a\xd9\xe4\xa5\xf1\x08\xda\x42\xee\xc9\x0b\xff\x26\x4f"
      "\x4e\x96\x93\xba\x92\xd6\x2a\x7a\x13\x1a\xf5\x45\x5a\xbe\x59\x41\x3b\x90"
      "\x0a\x7c\x47\xe2\x3d\xf2\x92\x23\x3b\xc3\x99\x14\xe2\xc2\xee\x1b\x03\x19"
      "\x1e\x8a\xed\x03\x22\x74\x87\x62\xc5\xd1\x67\x2f\x25\x06\x72\x90\x4f\x22"
      "\xbf\x79\x66\x31\xa2\x62\x25\xde\xa2\xc8\x55\x6a\xb9\xce\x5c\x76\x80\xbc"
      "\x77\x02\x8c\x7b\x59\x8a\x17\xe5\xa6\xcb\x3f\xd3\x82\xc5\x09\xfc\x82\xe4"
      "\x39\x52\xfc\x2c\x00\xc7\xd7\x41\x4e\xd3\xb5\x37\x81\xd5\xda\xb0\xae\x7a"
      "\x4e\x7e\xed\xfa\x89\x54\x4f\x69\x37\xf3\xb7\x9c\x16\x44\x7e\xde\x80\x84"
      "\x0f\xe2\x26\x3e\xb2\xad\xdb\x32\xab\xa1\xea\x7a\x4a\xab\x94\x9c\x5c\x9b"
      "\xf9\x3b\x6e\x46\x03\xda\x89\x06\xd5\xd9\x65\x59\x3b\x9a\x57\x47\x78\x66"
      "\xf6\xb9\x8d\x51\xe6\x57\xe8\x6a\x81\x72\xf6\x53\x6b\x44\x1f\x9c\xbf\x6a"
      "\xee\x80\x0d\x16\x50\xd3\x13\x86\xb4\x84\x1a\x62\x50\x03\x0d\xe7\x72\x22"
      "\x2d\x05\x73\xe3\x4e\x7b\xa8\x6f\x4c\x2d\x0d\xd0\xfd\x32\x00\xf6\xbb\x9c"
      "\x34\x74\x2f\x21\xd4\x81\x80\x97\x76\xbb\xb0\xa9\xbf\x04\xaf\xc3\x47\xdc"
      "\x4d\xc6\xff\x63\x31\xe4\x25\x78\x96\x31\x5a\x39\x4e\xef\xdc\xf4\xbf\xd9"
      "\x1f\x6c\x21\x0d\x4a\x69\x86\x9b\x02\x5f\x9c\xf9\xd0\x38\x1c\x88\xbf\xef"
      "\x1a\x6f\x8e\x7c\x69\x97\xd2\x60\x86\x2d\xcc\x9c\xdc\xd2\x03\x07\x0b\xb0"
      "\x65\x58\xe7\x22\xbe\x4a\x47\xda\x45\x85\x78\x4f\xe3\x61\x14\x55\x01\xf3"
      "\x9c\x12\x9a\x67\x8a\x36\x6b\x18\x05\xfd\xe5\xe1\xff\xcc\x24\x78\x46\x1f"
      "\xb9\x91\xdc\x62\x45\xd0\x5c\xed\x7a\xfa\x4d\x0e\xa2\x38\x3e\xff\xb0\x8e"
      "\x4e\xfc\xb3\x6e\x17\x9d\x91\x78\xf7\xc8\xa4\x03\xe2\x71\x04\x50\xe8\x62"
      "\x24\x17\x1c\xec\x1e\x6d\x8d\xe3\x54\x35\xd7\x33\x60\xe5\xf8\x70\x6d\xe7"
      "\xc8\x08\xb4\x79\x50\xec\xe4\x17\x51\x30\x3b\xeb\x28\x9b\x26\x33\x70\x49"
      "\x55\x40\xfc\x9e\x9c\xeb\x59\x48\x22\x00\x39\x8e\x3b\x8a\x92\x89\x7f\x9a"
      "\x5e\x7c\xa3\xcc\x3b\x2f\x4b\x24\x44\x30\xb6\xc7\x91\x8e\xa8\xb5\x56\x58"
      "\x70\xfe\xfb\x49\x40\x22\x3d\x08\x7f\xde\xc9\xc3\x71\xf3\x8e\x2d\x8a\x77"
      "\x6e\x54\xd7\xbe\xdb\x16\x17\x03\xa3\xb6\x71\x88\x61\xec\x7e\xa6\xec\x7b"
      "\xc6\xa2\x88\x25\x40\xa2\x31\x5c\xfa\x75\x27\xda\xf1\x52\x1c\x8e\x07\xa3"
      "\xf2\x57\xe0\xac\x98\xfc\xe8\xac\xaf\x55\x32\xe5\x02\xbf\x89\xe7\x18\x5d"
      "\x8c\xea\xaa\x90\x42\x02\x89\x87\xbb\xd3\x9d\xc1\x0a\x6c\xb2\x12\xf3\xe0"
      "\x4e\xb5\xfc\xf8\xfb\x36\x43\xb1\x21\x06\x55\x47\x9c\xbb\x17\xf4\x5b\x38"
      "\x61\x3d\xce\x8c\xeb\x18\x4c\x8c\x9c\xbc\x7f\x61\xd3\xa5\x76\x6c\x0d\xc6"
      "\x04\x74\xe8\xd6\xa2\xca\xc5\xf7\x85\xad\x29\xd6\x8f\xf5\x92\xa8\xc4\xc2"
      "\x15\x38\xff\x0f\x5c\x78\x62\x47\xb8\x5d\x39\xf7\x3f\x99\xae\xb9\x22\x8f"
      "\x51\x2a\xc4\xaa\x9a\xb7\xa4\x33\x99\x68\xed\xa1\x4a\x9b\xa4\x36\xf3\xd1"
      "\xd5\xdb\x08\x62\x16\xa8\xb4\x71\x5c\xeb\xb9\x33\x58\xae\x80\x29\x53\x42"
      "\x43\x7a\x85\x5f\xdb\xb5\x00\x00\x2f\x7b\xff\x57\x4f\xf6\xbd\x4d\xe9\x1a"
      "\xe5\xf4\x4a\x8d\xd9\x1c\xa9\x75\xf3\x57\xa7\xa1\x52\xfb\x65\x8e\xcd\xc8"
      "\x95\x96",
      8192));
  NONFAILING(syz_fuse_handle_req(/*fd=*/-1, /*buf=*/0x200000010440,
                                 /*len=*/0x2000, /*res=*/0));
  //  open arguments: [
  //    file: ptr[in, buffer] {
  //      buffer: {2e 2f 62 75 73 00} (length 0x6)
  //    }
  //    flags: open_flags = 0x14113e (8 bytes)
  //    mode: open_mode = 0x0 (8 bytes)
  //  ]
  //  returns fd
  NONFAILING(memcpy((void*)0x200000000100, "./bus\000", 6));
  res = syscall(__NR_open, /*file=*/0x200000000100ul,
                /*flags=O_SYNC|O_NOCTTY|O_NOATIME|O_RDWR|0x3c*/ 0x14113eul,
                /*mode=*/0ul);
  if (res != -1)
    r[2] = res;
  //  write$binfmt_script arguments: [
  //    fd: fd_binfmt (resource)
  //    data: ptr[in, binfmt_script] {
  //      binfmt_script {
  //        hdr: buffer: {23 21 20} (length 0x3)
  //        bin: buffer: {} (length 0x0)
  //        args: array[binfmt_script_arg] {
  //        }
  //        nl: const = 0xa (1 bytes)
  //        data: buffer: {} (length 0x0)
  //      }
  //    }
  //    len: bytesize = 0x208e24b (8 bytes)
  //  ]
  NONFAILING(memcpy((void*)0x200000000080, "#! ", 3));
  NONFAILING(*(uint8_t*)0x200000000083 = 0xa);
  syscall(__NR_write, /*fd=*/r[2], /*data=*/0x200000000080ul,
          /*len=*/0x208e24bul);
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffffffff000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x200000000000ul, /*len=*/0x1000000ul,
          /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x200001000000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  setup_sysctl();
  setup_cgroups();
  const char* reason;
  (void)reason;
  if ((reason = setup_binfmt_misc()))
    printf("the reproducer may not work as expected: binfmt_misc setup failed: "
           "%s\n",
           reason);
  if ((reason = setup_usb()))
    printf("the reproducer may not work as expected: USB injection setup "
           "failed: %s\n",
           reason);
  if ((reason = setup_swap()))
    printf("the reproducer may not work as expected: swap setup failed: %s\n",
           reason);
  install_segv_handler();
  use_temporary_dir();
  do_sandbox_none();
  return 0;
}