// https://syzkaller.appspot.com/bug?id=65e2125dd6c9158bcc1c4b9fddc87c26a51af407
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <arpa/inet.h>
#include <dirent.h>
#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <net/if.h>
#include <net/if_arp.h>
#include <netinet/in.h>
#include <sched.h>
#include <signal.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/mount.h>
#include <sys/prctl.h>
#include <sys/resource.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>

#include <linux/capability.h>
#include <linux/genetlink.h>
#include <linux/if_addr.h>
#include <linux/if_ether.h>
#include <linux/if_link.h>
#include <linux/if_tun.h>
#include <linux/in6.h>
#include <linux/ip.h>
#include <linux/neighbour.h>
#include <linux/net.h>
#include <linux/netlink.h>
#include <linux/rtnetlink.h>
#include <linux/tcp.h>
#include <linux/veth.h>

static unsigned long long procid;

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

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

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 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 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);
}

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

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

#define MAX_FDS 30

#define XT_TABLE_SIZE 1536
#define XT_MAX_ENTRIES 10

struct xt_counters {
  uint64_t pcnt, bcnt;
};

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

static void loop();

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

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

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

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

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

static void setup_loop()
{
  checkpoint_net_namespace();
}

static void reset_loop()
{
  reset_net_namespace();
}

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

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

#define USLEEP_FORKED_CHILD (3 * 50 * 1000)

static long handle_clone_ret(long ret)
{
  if (ret != 0) {
    return ret;
  }
  usleep(USLEEP_FORKED_CHILD);
  syscall(__NR_exit, 0);
  while (1) {
  }
}

static long syz_clone(volatile long flags, volatile long stack,
                      volatile long stack_len, volatile long ptid,
                      volatile long ctid, volatile long tls)
{
  long sp = (stack + stack_len) & ~15;
  long ret = (long)syscall(__NR_clone, flags & ~CLONE_VM, sp, ptid, ctid, tls);
  return handle_clone_ret(ret);
}

static void execute_one(void);

#define WAIT_FLAGS __WALL

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

void execute_one(void)
{
  memcpy((void*)0x20000200,
         "\x2a\xd6\x2d\x9c\x24\x13\xe6\xe3\x26\xf5\x96\xc0\xa5\x76\x71\x23\xad"
         "\xfa\x98\x45\x4e\xa9\x7a\xaf\xdd\x48\x0f\xb2\x5b\x1c\xe0\xa6\xdd\xd1"
         "\x1f\x7e\x22\x23\xc6\x72\x36\x21\xc4\x40\xb2\x1d\x09\x83\x6e\x19\x08"
         "\xfa\x09\x58\x05\xe1\x71\x8d\xee\xd5\x80\x91\x1a\xca\x7f\xd7\xee\x78"
         "\xa4\xf8\x26\xe9\x5e\xa0",
         74);
  syz_clone(/*flags=*/0x40000, /*stack=*/0x200000c0, /*stack_len=*/0,
            /*parentid=*/0, /*childtid=*/0, /*tls=*/0x20000200);
  memcpy(
      (void*)0x200013c0,
      "\x81\xb3\xaa\x0a\xcb\x13\x8b\x1d\x41\x3c\xa4\xb9\x8a\x37\x94\x0c\x47\xc8"
      "\xb3\x66\xb6\x2d\xc1\x18\x76\x28\x03\x06\xda\x7c\xd6\xba\x84\x1a\xfa\x63"
      "\x66\xd2\x3d\x14\x15\x9e\x14\xe8\xe7\xc4\x75\xad\x93\x99\x97\x96\xd3\xc4"
      "\x72\xd3\x3d\x8e\x0a\xbb\x08\xfc\x56\x3b\x3c\x2c\xbe\x7a\x3b\xd3\x28\x0e"
      "\x76\xd0\xc4\xcc\x50\xf0\x52\x44\x58\xe0\x74\xd0\xa6\xb5\x02\x4b\xe5\x12"
      "\xb0\x8b\xa0\xed\x6e\x92\xdf\x8b\x9f\x69\x81\xaf\x57\xa7\x97\xae\x50\xd2"
      "\x72\xe2\x5e\xda\xab\xc9\x65\x8e\xaa\x94\x5a\x77\x2b\xbe\x3d\xb9\x04\x66"
      "\x11\xaf\x8b\x53\xdb\xe7\x3b\x6b\x99\xb4\x4b\xe1\x22\x18\x36\x7f\x3d\xeb"
      "\x40\xbe\x62\x14\x15\x1b\x8e\x13\xa5\x16\xde\xa0\xb8\x01\xeb\x89\x19\xad"
      "\x7c\x54\x75\xb0\x89\x49\xd8\x5c\x4e\x0d\xe0\x0a\x92\xa0\x70\x2f\x18\xc1"
      "\xb4\x7e\x64\x5c\x71\x5f\xe2\x3c\x3a\x26\xc8\x00\xe9\xe2\xbe\x20\xaf\x41"
      "\x1e\xea\x3e\x18\xda\x7f\xa4\xf2\x56\x70\x87\x54\xa6\x18\xa0\xe8\x1b\xb5"
      "\x4a\xc4\x22\x1d\x49\x2d\xbf\x4f\xc7\x8e\x0d\x82\xa4\x0d\x6e\xc9\x34\xbc"
      "\x81\x9e\x2d\x2d\xfe\x4d\xf4\xab\x0d\x12\x32\x0e\x2a\xf1\x7e\xc3\x5b\x2f"
      "\xc5\x29\x9d\x39\xc6\x77\x1e\xc0\xe5\xaf\x75\x00\x87\x87\xf0\x03\xf9\x81"
      "\xc0\xf2\x57\x12\xeb\x0d\xff\x90\xb9\xa3\x66\x17\xa5\x5b\xbb\x39\x6f\x5c"
      "\x20\x7e\xdf\x98\xe6\x00\x69\xe4\x9c\x1d\x48\x2e\x10\x3c\x3c\xbb\xaf\x1b"
      "\x50\xcc\xb5\x5e\xe9\x96\xf5\xef\xff\x2e\x83\xf4\x87\x63\x55\x58\x85\x0c"
      "\xa8\xf4\x19\xf9\x85\x45\xb0\xed\xb6\xbb\x12\x08\x64\xa9\x52\x44\x0f\x37"
      "\xd3\xca\xfa\x4d\xcf\x99\x5a\x7e\xd7\x94\xd8\xf7\x57\xcd\x17\x1e\x6a\xe8"
      "\xb5\xcc\xce\x99\x36\x39\x83\x76\x3f\xce\x92\x0d\xf8\x3d\x4c\x47\x88\xb9"
      "\xc3\xfd\x6d\xbe\xa5\x4f\x50\x0d\x75\xbf\xf4\xec\xaf\xfe\x76\xaa\x7b\x38"
      "\x24\x07\xfa\x68\xb9\x4e\x95\x6e\x11\x12\x99\x36\xd9\x5f\xc8\x06\x3e\x2b"
      "\x15\xfe\x91\xb6\x30\x86\xc1\x10\xb4\xd4\x62\x4e\x90\x8e\x7d\x01\x10\x9e"
      "\xe5\x36\x8e\x23\x32\x46\xd0\x08\x6b\xfc\x22\xc0\x44\x02\xcf\xd2\x53\x8e"
      "\x38\x9b\x2f\xce\x86\x5f\x66\xc9\x65\xc3\xae\xc7\x15\x9d\x80\x7a\xfc\x89"
      "\x9f\x86\x2f\x97\x8f\x37\x3e\xc4\xde\x44\x8f\x16\x24\x3c\xd8\xbf\x1e\xbb"
      "\x61\x8f\x23\xda\xd4\x2e\x00\xc3\xf6\xa2\xfd\x02\x32\xe3\x92\x47\x16\x42"
      "\xb7\xb0\xe3\x6e\x1a\xd1\xe1\xe5\x56\x45\xa9\x74\xc7\x8b\xfa\x8d\x0b\x5d"
      "\x72\x2e\x1e\x31\x9a\xb8\x72\x5d\x91\xe3\x05\xc8\x4a\x71\xa2\xe9\xad\x4d"
      "\xbd\xd4\xf7\x28\x49\x30\xa9\xc2\x37\xb4\x9e\xc4\x93\x88\x34\xdc\xe0\x39"
      "\xc4\xc1\x96\x40\xeb\x47\x6e\xbb\x75\xac\x24\x1b\x2f\x69\x0f\x41\xe9\x93"
      "\x57\xe4\x32\xb5\x73\x60\x61\x0f\xa6\x26\x21\xd7\xdf\xe1\xda\x79\x00\x41"
      "\xe5\x71\x56\xd4\x8c\x19\x84\xaf\x28\xfd\xf7\x8a\x36\x94\xbb\x0f\xb3\x1d"
      "\x57\x9a\x55\x14\x07\x9e\x06\x5a\xd1\xef\x8b\x1e\x5c\x8b\x5e\x0d\xfa\xd9"
      "\x36\xe1\x11\xb9\xd3\xa8\x16\x0d\xf3\x08\x91\x3a\x32\xf8\xe0\x35\x52\x61"
      "\xe6\x9c\xa2\xab\xc1\xe2\x6b\x38\xe9\xe8\xa4\x49\x83\x67\xc0\xed\x8c\x80"
      "\x65\x83\x35\x7a\x43\x36\x94\x78\xc9\xd0\x42\x3a\x21\x0f\x06\x9e\x2b\x18"
      "\xf6\x91\x70\x6d\xdf\x05\x86\xd6\x3b\xc3\x5b\x99\xe7\x13\xda\x31\x7b\xeb"
      "\x93\xef\x2a\x84\x9f\x0f\xd3\x89\xee\x67\xb7\xbc\xce\x95\xa3\xa2\xdc\x7a"
      "\x9c\xb9\x1d\xe3\x30\x89\x46\xb2\x1d\xa4\x83\x69\x2a\xbf\x77\xa0\xf1\x5c"
      "\x61\x38\xf4\x39\x3b\x7b\x79\xb1\x4f\x75\x43\x1c\x30\xcf\xd5\x87\x51\xee"
      "\xdb\xad\xcf\x06\xa6\x02\x7a\x8c\x2f\xec\x4d\x0f\x50\x7a\x57\xa7\x94\x1c"
      "\x91\xef\x9f\x06\xbe\xc4\x79\xad\x72\x52\x14\x6f\x06\x5e\xf2\x2b\xe8\x6c"
      "\xed\xed\x9a\xad\x55\xe6\x31\x83\x9b\x31\x7d\x41\x25\x24\xb3\x89\x89\x7c"
      "\x69\x52\x40\x13\x44\x7f\x7d\xf0\x49\x49\xaa\x53\x6a\xe9\x89\xb6\xa6\x7d"
      "\x09\x9f\x88\x8c\x50\xa4\xc2\x8f\x55\xdd\x84\xaa\x69\xa5\xba\x5c\x96\x0d"
      "\x8f\xde\x3e\x65\xf6\x65\xc3\x9e\x52\xe0\xd2\x01\x55\xe7\x00\x7d\x1b\xa1"
      "\xf1\x1f\x02\xca\x20\xcc\xd5\x14\xa0\x75\xb3\x21\x7f\xb7\x7c\x8e\xa7\xa6"
      "\x1d\xb2\xae\x11\x3d\xbb\x2c\xac\xfa\xc2\x93\x41\x4b\xab\x9d\x3c\x24\x45"
      "\x0e\x64\xbd\xd3\xfe\x5a\xe8\xe3\xe4\x53\xc9\xa3\x23\xe1\x07\xe7\x57\xc9"
      "\xcc\x47\x51\xe5\xcb\x25\x9f\x49\x45\xc0\x90\x6f\xf4\x4d\x3e\x9d\x60\x45"
      "\x33\x3c\x6e\x1c\x3e\x48\x83\xa7\xdf\xe6\xbc\xd8\x08\x15\x04\x1b\x5c\xd5"
      "\x37\x86\x96\xcd\x26\x48\x65\x37\xd3\x9e\xf4\xa5\xac\x11\x66\xb5\xad\x11"
      "\x6a\xfe\x62\xd3\xbe\xbd\x92\x97\x4c\x1f\xd0\x76\x21\x7a\xba\x3b\x53\x48"
      "\xf2\x2d\x88\x11\x78\x12\xd0\xe0\x87\xbc\x5c\x99\xdd\xa7\x71\x24\x27\x31"
      "\xef\x86\xcb\x73\x4a\x8d\x6f\x14\xdb\x41\xb7\x8e\xa0\x59\x1b\xc1\x86\x05"
      "\x0d\x12\xfe\x8f\x81\x32\x55\x37\x90\xf7\x8e\x3f\x8a\x32\x45\xde\x9d\x8a"
      "\xee\x64\x24\xfd\xeb\xc1\xc7\x02\xc7\x49\x80\xc5\xe0\x4d\x0b\x36\x2c\x79"
      "\x8a\x4f\x36\x52\xb1\x48\x75\x6b\x83\xb2\xfd\x98\xba\x1c\xc7\x55\xbb\x42"
      "\xc0\xc8\x41\x48\x97\xcf\x2a\x69\xbc\x55\xaf\x67\x04\x0c\xe3\x8e\xc3\x5d"
      "\xe4\xa7\x41\x00\x42\x86\x8f\x82\x88\x55\xd7\x6c\x20\x3c\x5a\x4d\x14\xd5"
      "\x2d\x78\xf2\xe5\x23\xe8\xd9\xbd\xf0\xbe\x2b\x5d\x3d\x45\x30\x74\x18\x9a"
      "\x36\x8d\xfe\x82\x02\x07\x93\x6b\x3d\x77\xfe\x4e\xc2\x71\xf6\x76\xe0\xc6"
      "\xbf\x50\x69\x55\x67\x4d\xd6\xd1\x44\x60\x89\xda\xfb\x58\x02\xe2\xeb\x88"
      "\x84\x93\x00\x83\x10\xe1\xef\x2d\xc4\xf7\x24\xce\xe7\x20\x87\x56\x97\x7b"
      "\x48\xb9\xd9\x73\x6e\x72\xbd\xaa\x07\x79\xc2\x46\x02\x76\xe0\x4b\x22\xcb"
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      "\x12\xa7\x82\x31\x03\x5c\xbf\x28\x76\xa1\xa9\x8b\x53\xd0\x37\x53\xb7\xdf"
      "\x8c\xb7\x78\x03\xde\xc1\x00\xb9\x4c\xf9\xd2\x63\x67\xa1\x40\xf5\x35\x50"
      "\xe5\x9e\xb4\x98\xc8\x47\xcf\xc8\xa4\x54\x44\x32\x69\x94\x25\x9d\x18\x33"
      "\x03\x7f\xca\xa8\x89\xde\x24\x85\xf5\xb7\x98\xdc\xee\x00\x63\x91\xcc\x08"
      "\x2c\xf1\x8b\xbd\x47\x3d\x9a\x2e\x39\x90\x68\x92\x71\x1b\xb9\x59\x55\x78"
      "\xf1\x45\xe5\x7e\x3b\x79\x79\x7d\x6a\x5a\x50\x58\x28\xa9\x06\xf3\x5e\x56"
      "\x4b\x61\xec\xd3\x26\xaf\x6a\x10\xf9\x58\x55\xb0\xa1\x8c\x41\xf1\xe7\x16"
      "\x22\xb1\xb1\x66\xcc\xb8\xb7\x18\xc5\x19\x35\x22\xaa\x4d\x1f\xc1\xe7\x5b"
      "\xb0\xa9\xc2\xb6\xab\x49\x16\x8d\xb4\x1e\x63\xbd\xf1\xb9\x7d\x14\x3a\x09"
      "\xb2\x1a\x28\x56\xbc\x66\x13\x07\x58\xd9\x1e\x81\x18\xa9\x16\x37\x12\xc4"
      "\xea\x6b\x56\xc4\xd6\xef\x8a\x85\x0d\xdc\x81\x6e\xf6\x65\x46\x8b\x9f\xa0"
      "\x96\xf1\x71\x6d\xf6\x7f\x85\xb6\x9e\xeb\x0b\x64\x9f\x20\xfb\xc4\x6d\x86"
      "\xe6\x58\xd7\x61\x0a\xe0\x50\xe3\xed\xd6\x24\xa0\x7b\xf9\x6b\xc5\x8a\x70"
      "\x72\xff\xce\xff\x7d\x3e\x4c\x8f\x41\xf1\x6d\x5f\x99\xfd\x91\x40\x2e\x2f"
      "\x33\x45\x51\xb6\xfa\x0d\x26\x76\xc3\xcc\x19\x00\xe5\xff\x75\xb6\xe3\xf4"
      "\xd8\x21\x54\x9c\xad\xd8\xdd\x8b\xe4\xd8\x6e\xfc\x4c\xd2\xde\x5c\x46\x59"
      "\xd6\x9e\xe5\xe1\x24\x0c\xae\x57\xf7\x0a\x5e\x78\x5b\x62\x17\x18\x93\x70"
      "\xcd\xe5\xaa\xec\xa1\x1b\x49\x6a\x61\x02\x1d\x5c\xa3\x62\x66\xcd\x13\xd4"
      "\x46\x43\x57\xa1\xae\x69\x52\x70\x48\x77\xcd\x87\xfd\x14\xf9\xdd\x6a\x08"
      "\x90\x97\x98\x81\x50\x43\x0c\x3b\xe6\xee\xba\x91\xf6\x26\xf5\xe3\xa8\xd4"
      "\x70\xb0\x3c\x57\x6e\x64\xf9\x1b\xf5\x6f\xbe\x11\xba\xf1\x50\xcb\xab\x5d"
      "\x52\x67\x5c\x9c\x96\x5f\xae\x30\xeb\x24\x1f\xc8\x0b\xda\x6b\x7c\xcd\xa3"
      "\xa3\x54\x18\x79\x02\x2e\xf0\x44\xf7\x62\xf7\xc5\xf6\x6c\x31\x37\x71\x28"
      "\x0d\xa6\x59\x0c\xa6\xea\xe1\x1d\xa9\xcb\x93\xb1\xc7\xf7\x12\x31\xb9\xa7"
      "\x64\xc5\x01\x6e\xce\x62\x0a\x7f\xa6\x15\x92\x2a\xf1\x26\x1b\x76\xc8\x61"
      "\x81\x44\x86\xc0\xf2\x9e\xe5\x6c\xfe\xfe\x21\xe3\x41\x25\x6b\xed\x0d\x59"
      "\xce\x0f\x91\x43\x25\x4f\xa8\x37\x2c\x1b\xb1\x71\x03\xf5\xf3\xe9\xb3\x57"
      "\xb3\x5d\xe4\x97\x0b\xd5\xae\x32\xd9\x15\x1b\x3a\xcc\x7e\xc8\xf6\xaa\xa3"
      "\x3a\x41\xe3\x00\x5e\x6c\xf6\xf2\x78\x13\x2a\x84\x86\xb5\x50\x7b\xba\xf1"
      "\x61\xdb\xa4\xe1\x37\x94\x70\x84\xc0\xad\x04\x0d\x88\xa1\xaf\x14\x94\xb0"
      "\x10\x27\xb5\x1d\xee\xf0\x60\xf7\x20\xd4\x26\x7d\x01\x5b\xdd\x23\x70\x01"
      "\x20\x15\x4a\xa6\xc0\x16\x23\x34\xad\x56\x81\xa5\x8b\x45\xa4\x9c\xed\x1e"
      "\x12\x65\x7c\x8a\x60\x4a\xc6\xaa\x56\x5d\xab\x0b\x47\x63\x44\xdd\x30\xfa"
      "\x21\xa1\xeb\x09\x79\x6f\x3d\xac\xed\x4b",
      4096);
  syz_clone(/*flags=*/0x20100, /*stack=*/0x200002c0, /*stack_len=*/0,
            /*parentid=*/0, /*childtid=*/0, /*tls=*/0x200013c0);
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=*/0x32ul, /*fd=*/-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0x1000000ul, /*prot=*/7ul,
          /*flags=*/0x32ul, /*fd=*/-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x21000000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=*/0x32ul, /*fd=*/-1, /*offset=*/0ul);
  for (procid = 0; procid < 6; procid++) {
    if (fork() == 0) {
      do_sandbox_none();
    }
  }
  sleep(1000000);
  return 0;
}