syzkaller-repros/linux/39528e6baaf2604cc2e041efc73780754f8ef80c.c

// BUG: unable to handle kernel NULL pointer dereference in __do_softirq
// https://syzkaller.appspot.com/bug?id=39528e6baaf2604cc2e041efc73780754f8ef80c
// status:invalid
// 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_arp.h>
#include <netinet/in.h>
#include <pthread.h>
#include <sched.h>
#include <setjmp.h>
#include <signal.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/mount.h>
#include <sys/prctl.h>
#include <sys/resource.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/uio.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>

#include <linux/futex.h>
#include <linux/if.h>
#include <linux/if_ether.h>
#include <linux/if_tun.h>
#include <linux/ip.h>
#include <linux/net.h>
#include <linux/tcp.h>

unsigned long long procid;

static __thread int skip_segv;
static __thread jmp_buf segv_env;

static void segv_handler(int sig, siginfo_t* info, void* ctx)
{
  uintptr_t addr = (uintptr_t)info->si_addr;
  const uintptr_t prog_start = 1 << 20;
  const uintptr_t prog_end = 100 << 20;
  if (__atomic_load_n(&skip_segv, __ATOMIC_RELAXED) &&
      (addr < prog_start || addr > prog_end)) {
    _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(...)                                                        \
  {                                                                            \
    __atomic_fetch_add(&skip_segv, 1, __ATOMIC_SEQ_CST);                       \
    if (_setjmp(segv_env) == 0) {                                              \
      __VA_ARGS__;                                                             \
    }                                                                          \
    __atomic_fetch_sub(&skip_segv, 1, __ATOMIC_SEQ_CST);                       \
  }

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

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

static void use_temporary_dir(void)
{
  char tmpdir_template[] = "./syzkaller.XXXXXX";
  char* tmpdir = mkdtemp(tmpdir_template);
  if (!tmpdir)
    exit(1);
  if (chmod(tmpdir, 0777))
    exit(1);
  if (chdir(tmpdir))
    exit(1);
}

static void thread_start(void* (*fn)(void*), void* arg)
{
  pthread_t th;
  pthread_attr_t attr;
  pthread_attr_init(&attr);
  pthread_attr_setstacksize(&attr, 128 << 10);
  if (pthread_create(&th, &attr, fn, arg))
    exit(1);
  pthread_attr_destroy(&attr);
}

#define BITMASK_LEN(type, bf_len) (type)((1ull << (bf_len)) - 1)

#define BITMASK_LEN_OFF(type, bf_off, bf_len)                                  \
  (type)(BITMASK_LEN(type, (bf_len)) << (bf_off))

#define STORE_BY_BITMASK(type, addr, val, bf_off, bf_len)                      \
  if ((bf_off) == 0 && (bf_len) == 0) {                                        \
    *(type*)(addr) = (type)(val);                                              \
  } else {                                                                     \
    type new_val = *(type*)(addr);                                             \
    new_val &= ~BITMASK_LEN_OFF(type, (bf_off), (bf_len));                     \
    new_val |= ((type)(val)&BITMASK_LEN(type, (bf_len))) << (bf_off);          \
    *(type*)(addr) = new_val;                                                  \
  }

typedef struct {
  int state;
} event_t;

static void event_init(event_t* ev)
{
  ev->state = 0;
}

static void event_reset(event_t* ev)
{
  ev->state = 0;
}

static void event_set(event_t* ev)
{
  if (ev->state)
    exit(1);
  __atomic_store_n(&ev->state, 1, __ATOMIC_RELEASE);
  syscall(SYS_futex, &ev->state, FUTEX_WAKE | FUTEX_PRIVATE_FLAG);
}

static void event_wait(event_t* ev)
{
  while (!__atomic_load_n(&ev->state, __ATOMIC_ACQUIRE))
    syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, 0);
}

static int event_isset(event_t* ev)
{
  return __atomic_load_n(&ev->state, __ATOMIC_ACQUIRE);
}

static int event_timedwait(event_t* ev, uint64_t timeout)
{
  uint64_t start = current_time_ms();
  uint64_t now = start;
  for (;;) {
    uint64_t remain = timeout - (now - start);
    struct timespec ts;
    ts.tv_sec = remain / 1000;
    ts.tv_nsec = (remain % 1000) * 1000 * 1000;
    syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, &ts);
    if (__atomic_load_n(&ev->state, __ATOMIC_RELAXED))
      return 1;
    now = current_time_ms();
    if (now - start > timeout)
      return 0;
  }
}

static void vsnprintf_check(char* str, size_t size, const char* format,
                            va_list args)
{
  int rv;
  rv = vsnprintf(str, size, format, args);
  if (rv < 0)
    exit(1);
  if ((size_t)rv >= size)
    exit(1);
}

#define COMMAND_MAX_LEN 128
#define PATH_PREFIX                                                            \
  "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin "
#define PATH_PREFIX_LEN (sizeof(PATH_PREFIX) - 1)

static void execute_command(bool panic, const char* format, ...)
{
  va_list args;
  char command[PATH_PREFIX_LEN + COMMAND_MAX_LEN];
  int rv;
  va_start(args, format);
  memcpy(command, PATH_PREFIX, PATH_PREFIX_LEN);
  vsnprintf_check(command + PATH_PREFIX_LEN, COMMAND_MAX_LEN, format, args);
  va_end(args);
  rv = system(command);
  if (rv) {
    if (panic)
      exit(1);
  }
}

static int tunfd = -1;
static int tun_frags_enabled;
#define SYZ_TUN_MAX_PACKET_SIZE 1000

#define TUN_IFACE "syz_tun"

#define LOCAL_MAC "aa:aa:aa:aa:aa:aa"
#define REMOTE_MAC "aa:aa:aa:aa:aa:bb"

#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
#define IFF_NAPI_FRAGS 0x0020

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 = 240;
  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 | IFF_NAPI | IFF_NAPI_FRAGS;
  if (ioctl(tunfd, TUNSETIFF, (void*)&ifr) < 0) {
    ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
    if (ioctl(tunfd, TUNSETIFF, (void*)&ifr) < 0)
      exit(1);
  }
  if (ioctl(tunfd, TUNGETIFF, (void*)&ifr) < 0)
    exit(1);
  tun_frags_enabled = (ifr.ifr_flags & IFF_NAPI_FRAGS) != 0;
  execute_command(0, "sysctl -w net.ipv6.conf.%s.accept_dad=0", TUN_IFACE);
  execute_command(0, "sysctl -w net.ipv6.conf.%s.router_solicitations=0",
                  TUN_IFACE);
  execute_command(1, "ip link set dev %s address %s", TUN_IFACE, LOCAL_MAC);
  execute_command(1, "ip addr add %s/24 dev %s", LOCAL_IPV4, TUN_IFACE);
  execute_command(1, "ip neigh add %s lladdr %s dev %s nud permanent",
                  REMOTE_IPV4, REMOTE_MAC, TUN_IFACE);
  execute_command(0, "ip -6 addr add %s/120 dev %s", LOCAL_IPV6, TUN_IFACE);
  execute_command(0, "ip -6 neigh add %s lladdr %s dev %s nud permanent",
                  REMOTE_IPV6, REMOTE_MAC, TUN_IFACE);
  execute_command(1, "ip link set dev %s up", TUN_IFACE);
}

#define DEV_IPV4 "172.20.20.%d"
#define DEV_IPV6 "fe80::%02hx"
#define DEV_MAC "aa:aa:aa:aa:aa:%02hx"

static void snprintf_check(char* str, size_t size, const char* format, ...)
{
  va_list args;
  va_start(args, format);
  vsnprintf_check(str, size, format, args);
  va_end(args);
}
static void initialize_netdevices(void)
{
  unsigned i;
  const char* devtypes[] = {"ip6gretap", "bridge", "vcan", "bond", "team"};
  const char* devnames[] = {"lo",
                            "sit0",
                            "bridge0",
                            "vcan0",
                            "tunl0",
                            "gre0",
                            "gretap0",
                            "ip_vti0",
                            "ip6_vti0",
                            "ip6tnl0",
                            "ip6gre0",
                            "ip6gretap0",
                            "erspan0",
                            "bond0",
                            "veth0",
                            "veth1",
                            "team0",
                            "veth0_to_bridge",
                            "veth1_to_bridge",
                            "veth0_to_bond",
                            "veth1_to_bond",
                            "veth0_to_team",
                            "veth1_to_team"};
  const char* devmasters[] = {"bridge", "bond", "team"};
  for (i = 0; i < sizeof(devtypes) / (sizeof(devtypes[0])); i++)
    execute_command(0, "ip link add dev %s0 type %s", devtypes[i], devtypes[i]);
  execute_command(0, "ip link add type veth");
  for (i = 0; i < sizeof(devmasters) / (sizeof(devmasters[0])); i++) {
    execute_command(
        0, "ip link add name %s_slave_0 type veth peer name veth0_to_%s",
        devmasters[i], devmasters[i]);
    execute_command(
        0, "ip link add name %s_slave_1 type veth peer name veth1_to_%s",
        devmasters[i], devmasters[i]);
    execute_command(0, "ip link set %s_slave_0 master %s0", devmasters[i],
                    devmasters[i]);
    execute_command(0, "ip link set %s_slave_1 master %s0", devmasters[i],
                    devmasters[i]);
    execute_command(0, "ip link set veth0_to_%s up", devmasters[i]);
    execute_command(0, "ip link set veth1_to_%s up", devmasters[i]);
  }
  execute_command(0, "ip link set bridge_slave_0 up");
  execute_command(0, "ip link set bridge_slave_1 up");
  for (i = 0; i < sizeof(devnames) / (sizeof(devnames[0])); i++) {
    char addr[32];
    snprintf_check(addr, sizeof(addr), DEV_IPV4, i + 10);
    execute_command(0, "ip -4 addr add %s/24 dev %s", addr, devnames[i]);
    snprintf_check(addr, sizeof(addr), DEV_IPV6, i + 10);
    execute_command(0, "ip -6 addr add %s/120 dev %s", addr, devnames[i]);
    snprintf_check(addr, sizeof(addr), DEV_MAC, i + 10);
    execute_command(0, "ip link set dev %s address %s", devnames[i], addr);
    execute_command(0, "ip link set dev %s up", devnames[i]);
  }
}

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)
      return -1;
    if (errno == EBADFD)
      return -1;
    exit(1);
  }
  return rv;
}

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

#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;
  void* entrytable[XT_TABLE_SIZE / sizeof(void*)];
};

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;
  char entrytable[XT_TABLE_SIZE];
};

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;
  void* entrytable[XT_TABLE_SIZE / sizeof(void*)];
};

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;
  char entrytable[XT_TABLE_SIZE];
};

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)
{
  struct ipt_get_entries entries;
  socklen_t optlen;
  int fd, i;
  fd = socket(family, SOCK_STREAM, IPPROTO_TCP);
  if (fd == -1) {
    switch (errno) {
    case EAFNOSUPPORT:
    case ENOPROTOOPT:
      return;
    }
    exit(1);
  }
  for (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);
    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);
    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)
{
  struct xt_counters counters[XT_MAX_ENTRIES];
  struct ipt_get_entries entries;
  struct ipt_getinfo info;
  socklen_t optlen;
  int fd, i;
  fd = socket(family, SOCK_STREAM, IPPROTO_TCP);
  if (fd == -1) {
    switch (errno) {
    case EAFNOSUPPORT:
    case ENOPROTOOPT:
      return;
    }
    exit(1);
  }
  for (i = 0; i < num_tables; i++) {
    struct ipt_table_desc* table = &tables[i];
    if (table->info.valid_hooks == 0)
      continue;
    memset(&info, 0, sizeof(info));
    strcpy(info.name, table->name);
    optlen = sizeof(info);
    if (getsockopt(fd, level, IPT_SO_GET_INFO, &info, &optlen))
      exit(1);
    if (memcmp(&table->info, &info, sizeof(table->info)) == 0) {
      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;
    }
    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)
{
  struct arpt_get_entries entries;
  socklen_t optlen;
  unsigned i;
  int fd;
  fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
  if (fd == -1) {
    switch (errno) {
    case EAFNOSUPPORT:
    case ENOPROTOOPT:
      return;
    }
    exit(1);
  }
  for (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);
    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);
    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()
{
  struct xt_counters counters[XT_MAX_ENTRIES];
  struct arpt_get_entries entries;
  struct arpt_getinfo info;
  socklen_t optlen;
  unsigned i;
  int fd;
  fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
  if (fd == -1) {
    switch (errno) {
    case EAFNOSUPPORT:
    case ENOPROTOOPT:
      return;
    }
    exit(1);
  }
  for (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;
    memset(&info, 0, sizeof(info));
    strcpy(info.name, table->name);
    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) {
      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 {
    }
    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)
{
  socklen_t optlen;
  unsigned i;
  int fd;
  fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
  if (fd == -1) {
    switch (errno) {
    case EAFNOSUPPORT:
    case ENOPROTOOPT:
      return;
    }
    exit(1);
  }
  for (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);
    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()
{
  struct ebt_replace replace;
  char entrytable[XT_TABLE_SIZE];
  socklen_t optlen;
  unsigned i, j, h;
  int fd;
  fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
  if (fd == -1) {
    switch (errno) {
    case EAFNOSUPPORT:
    case ENOPROTOOPT:
      return;
    }
    exit(1);
  }
  for (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;
    memset(&replace, 0, sizeof(replace));
    strcpy(replace.name, table->name);
    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 (h = 0; h < NF_BR_NUMHOOKS; h++)
      table->replace.hook_entry[h] = 0;
    if (memcmp(&table->replace, &replace, sizeof(table->replace)) == 0) {
      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 (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_cgroups()
{
  if (mkdir("/syzcgroup", 0777)) {
  }
  if (mkdir("/syzcgroup/unified", 0777)) {
  }
  if (mount("none", "/syzcgroup/unified", "cgroup2", 0, NULL)) {
  }
  if (chmod("/syzcgroup/unified", 0777)) {
  }
  if (!write_file("/syzcgroup/unified/cgroup.subtree_control",
                  "+cpu +memory +io +pids +rdma")) {
  }
  if (mkdir("/syzcgroup/cpu", 0777)) {
  }
  if (mount("none", "/syzcgroup/cpu", "cgroup", 0,
            "cpuset,cpuacct,perf_event,hugetlb")) {
  }
  if (!write_file("/syzcgroup/cpu/cgroup.clone_children", "1")) {
  }
  if (chmod("/syzcgroup/cpu", 0777)) {
  }
  if (mkdir("/syzcgroup/net", 0777)) {
  }
  if (mount("none", "/syzcgroup/net", "cgroup", 0,
            "net_cls,net_prio,devices,freezer")) {
  }
  if (chmod("/syzcgroup/net", 0777)) {
  }
}
static void setup_binfmt_misc()
{
  if (mount(0, "/proc/sys/fs/binfmt_misc", "binfmt_misc", 0, 0)) {
  }
  if (!write_file("/proc/sys/fs/binfmt_misc/register",
                  ":syz0:M:0:\x01::./file0:")) {
  }
  if (!write_file("/proc/sys/fs/binfmt_misc/register",
                  ":syz1:M:1:\x02::./file0:POC")) {
  }
}

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

static void loop();

static void sandbox_common()
{
  prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
  setpgrp();
  setsid();
  struct rlimit rlim;
  rlim.rlim_cur = rlim.rlim_max = 200 << 20;
  setrlimit(RLIMIT_AS, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 32 << 20;
  setrlimit(RLIMIT_MEMLOCK, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 136 << 20;
  setrlimit(RLIMIT_FSIZE, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 1 << 20;
  setrlimit(RLIMIT_STACK, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 0;
  setrlimit(RLIMIT_CORE, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 256;
  setrlimit(RLIMIT_NOFILE, &rlim);
  if (unshare(CLONE_NEWNS)) {
  }
  if (unshare(CLONE_NEWIPC)) {
  }
  if (unshare(0x02000000)) {
  }
  if (unshare(CLONE_NEWUTS)) {
  }
  if (unshare(CLONE_SYSVSEM)) {
  }
}

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

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();
  if (unshare(CLONE_NEWNET)) {
  }
  initialize_tun();
  initialize_netdevices();
  loop();
  exit(1);
}

#define FS_IOC_SETFLAGS _IOW('f', 2, long)
static void remove_dir(const char* dir)
{
  DIR* dp;
  struct dirent* ep;
  int iter = 0;
retry:
  while (umount2(dir, MNT_DETACH) == 0) {
  }
  dp = opendir(dir);
  if (dp == NULL) {
    if (errno == EMFILE) {
      exit(1);
    }
    exit(1);
  }
  while ((ep = readdir(dp))) {
    if (strcmp(ep->d_name, ".") == 0 || strcmp(ep->d_name, "..") == 0)
      continue;
    char filename[FILENAME_MAX];
    snprintf(filename, sizeof(filename), "%s/%s", dir, ep->d_name);
    while (umount2(filename, MNT_DETACH) == 0) {
    }
    struct stat st;
    if (lstat(filename, &st))
      exit(1);
    if (S_ISDIR(st.st_mode)) {
      remove_dir(filename);
      continue;
    }
    int i;
    for (i = 0;; i++) {
      if (unlink(filename) == 0)
        break;
      if (errno == EPERM) {
        int fd = open(filename, O_RDONLY);
        if (fd != -1) {
          long flags = 0;
          if (ioctl(fd, FS_IOC_SETFLAGS, &flags) == 0)
            close(fd);
          continue;
        }
      }
      if (errno == EROFS) {
        break;
      }
      if (errno != EBUSY || i > 100)
        exit(1);
      if (umount2(filename, MNT_DETACH))
        exit(1);
    }
  }
  closedir(dp);
  int i;
  for (i = 0;; i++) {
    if (rmdir(dir) == 0)
      break;
    if (i < 100) {
      if (errno == EPERM) {
        int fd = open(dir, O_RDONLY);
        if (fd != -1) {
          long flags = 0;
          if (ioctl(fd, FS_IOC_SETFLAGS, &flags) == 0)
            close(fd);
          continue;
        }
      }
      if (errno == EROFS) {
        break;
      }
      if (errno == EBUSY) {
        if (umount2(dir, MNT_DETACH))
          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);
  int i;
  for (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) {
  }
}

#define SYZ_HAVE_SETUP_LOOP 1
static void setup_loop()
{
  int pid = getpid();
  char cgroupdir[64];
  char file[128];
  snprintf(cgroupdir, sizeof(cgroupdir), "/syzcgroup/unified/syz%llu", procid);
  if (mkdir(cgroupdir, 0777)) {
  }
  snprintf(file, sizeof(file), "%s/pids.max", cgroupdir);
  if (!write_file(file, "32")) {
  }
  snprintf(file, sizeof(file), "%s/memory.low", cgroupdir);
  if (!write_file(file, "%d", 298 << 20)) {
  }
  snprintf(file, sizeof(file), "%s/memory.high", cgroupdir);
  if (!write_file(file, "%d", 299 << 20)) {
  }
  snprintf(file, sizeof(file), "%s/memory.max", cgroupdir);
  if (!write_file(file, "%d", 300 << 20)) {
  }
  snprintf(file, sizeof(file), "%s/cgroup.procs", cgroupdir);
  if (!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);
  if (!write_file(file, "%d", pid)) {
  }
  snprintf(cgroupdir, sizeof(cgroupdir), "/syzcgroup/net/syz%llu", procid);
  if (mkdir(cgroupdir, 0777)) {
  }
  snprintf(file, sizeof(file), "%s/cgroup.procs", cgroupdir);
  if (!write_file(file, "%d", pid)) {
  }
  checkpoint_net_namespace();
}

#define SYZ_HAVE_RESET_LOOP 1
static void reset_loop()
{
  reset_net_namespace();
}

#define SYZ_HAVE_SETUP_TEST 1
static void setup_test()
{
  prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
  setpgrp();
  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")) {
  }
  if (!write_file("/proc/self/oom_score_adj", "1000")) {
  }
  flush_tun();
}

#define SYZ_HAVE_RESET_TEST 1
static void reset_test()
{
  int fd;
  for (fd = 3; fd < 30; fd++)
    close(fd);
}

struct thread_t {
  int created, call;
  event_t ready, done;
};

static struct thread_t threads[16];
static void execute_call(int call);
static int running;

static void* thr(void* arg)
{
  struct thread_t* th = (struct thread_t*)arg;
  for (;;) {
    event_wait(&th->ready);
    event_reset(&th->ready);
    execute_call(th->call);
    __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED);
    event_set(&th->done);
  }
  return 0;
}

static void execute_one(void)
{
  int i, call, thread;
  int collide = 0;
again:
  for (call = 0; call < 18; call++) {
    for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0]));
         thread++) {
      struct thread_t* th = &threads[thread];
      if (!th->created) {
        th->created = 1;
        event_init(&th->ready);
        event_init(&th->done);
        event_set(&th->done);
        thread_start(thr, th);
      }
      if (!event_isset(&th->done))
        continue;
      event_reset(&th->done);
      th->call = call;
      __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED);
      event_set(&th->ready);
      if (collide && (call % 2) == 0)
        break;
      event_timedwait(&th->done, 45);
      break;
    }
  }
  for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++)
    sleep_ms(1);
  if (!collide) {
    collide = 1;
    goto again;
  }
}

static void execute_one(void);

#define WAIT_FLAGS __WALL

static void loop(void)
{
  setup_loop();
  int iter;
  for (iter = 0;; 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();
      reset_test();
      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 < 5 * 1000)
        continue;
      kill_and_wait(pid, &status);
      break;
    }
    remove_dir(cwdbuf);
  }
}
#ifndef __NR_bpf
#define __NR_bpf 321
#endif

uint64_t r[5] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff,
                 0xffffffffffffffff, 0xffffffffffffffff};

void execute_call(int call)
{
  long res;
  switch (call) {
  case 0:
    NONFAILING(*(uint32_t*)0x2025c000 = 0);
    NONFAILING(*(uint32_t*)0x2025c004 = 0x70);
    NONFAILING(*(uint8_t*)0x2025c008 = 0);
    NONFAILING(*(uint8_t*)0x2025c009 = 0);
    NONFAILING(*(uint8_t*)0x2025c00a = 0);
    NONFAILING(*(uint8_t*)0x2025c00b = 0);
    NONFAILING(*(uint32_t*)0x2025c00c = 0);
    NONFAILING(*(uint64_t*)0x2025c010 = 0);
    NONFAILING(*(uint64_t*)0x2025c018 = 0);
    NONFAILING(*(uint64_t*)0x2025c020 = 0);
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 0, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 1, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 2, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 3, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 4, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 5, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 6, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 7, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 8, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 9, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 10, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 11, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 12, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 13, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 14, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 15, 2));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 17, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 18, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 19, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 20, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 21, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 22, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 23, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 24, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 25, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 26, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 27, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 28, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 29, 35));
    NONFAILING(*(uint32_t*)0x2025c030 = 0);
    NONFAILING(*(uint32_t*)0x2025c034 = 0);
    NONFAILING(*(uint64_t*)0x2025c038 = 0);
    NONFAILING(*(uint64_t*)0x2025c040 = 0);
    NONFAILING(*(uint64_t*)0x2025c048 = 0);
    NONFAILING(*(uint64_t*)0x2025c050 = 0);
    NONFAILING(*(uint32_t*)0x2025c058 = 0);
    NONFAILING(*(uint32_t*)0x2025c05c = 0);
    NONFAILING(*(uint64_t*)0x2025c060 = 0);
    NONFAILING(*(uint32_t*)0x2025c068 = 0);
    NONFAILING(*(uint16_t*)0x2025c06c = 0);
    NONFAILING(*(uint16_t*)0x2025c06e = 0);
    syscall(__NR_perf_event_open, 0x2025c000, 0, 0, -1, 0);
    break;
  case 1:
    NONFAILING(memcpy((void*)0x20001a00, "/dev/net/tun", 13));
    res = syscall(__NR_openat, 0xffffffffffffff9c, 0x20001a00, 0x3fffe, 0);
    if (res != -1)
      r[0] = res;
    break;
  case 2:
    NONFAILING(memcpy(
        (void*)0x20000300,
        "\x6e\x72\x30\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00",
        16));
    NONFAILING(*(uint16_t*)0x20000310 = 0x1132);
    syscall(__NR_ioctl, r[0], 0x400454ca, 0x20000300);
    break;
  case 3:
    res = syscall(__NR_socketpair, 1, 0x80002, 0, 0x20000080);
    if (res != -1)
      NONFAILING(r[1] = *(uint32_t*)0x20000084);
    break;
  case 4:
    NONFAILING(*(uint32_t*)0x20000080 = 2);
    NONFAILING(*(uint32_t*)0x20000084 = 0x70);
    NONFAILING(*(uint8_t*)0x20000088 = 0xe2);
    NONFAILING(*(uint8_t*)0x20000089 = 0);
    NONFAILING(*(uint8_t*)0x2000008a = 0);
    NONFAILING(*(uint8_t*)0x2000008b = 0);
    NONFAILING(*(uint32_t*)0x2000008c = 0);
    NONFAILING(*(uint64_t*)0x20000090 = 0);
    NONFAILING(*(uint64_t*)0x20000098 = 0);
    NONFAILING(*(uint64_t*)0x200000a0 = 0);
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x200000a8, 0, 0, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x200000a8, 0, 1, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x200000a8, 0, 2, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x200000a8, 0, 3, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x200000a8, 0, 4, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x200000a8, 0, 5, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x200000a8, 0, 6, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x200000a8, 0, 7, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x200000a8, 0, 8, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x200000a8, 0, 9, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x200000a8, 0, 10, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x200000a8, 0, 11, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x200000a8, 0, 12, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x200000a8, 0, 13, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x200000a8, 0, 14, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x200000a8, 0, 15, 2));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x200000a8, 0, 17, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x200000a8, 0, 18, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x200000a8, 0, 19, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x200000a8, 0, 20, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x200000a8, 0, 21, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x200000a8, 0, 22, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x200000a8, 0, 23, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x200000a8, 0, 24, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x200000a8, 0, 25, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x200000a8, 0, 26, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x200000a8, 0, 27, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x200000a8, 0, 28, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x200000a8, 0, 29, 35));
    NONFAILING(*(uint32_t*)0x200000b0 = 0);
    NONFAILING(*(uint32_t*)0x200000b4 = 0);
    NONFAILING(*(uint64_t*)0x200000b8 = 0x200004c0);
    NONFAILING(*(uint64_t*)0x200000c0 = 0);
    NONFAILING(*(uint64_t*)0x200000c8 = 0);
    NONFAILING(*(uint64_t*)0x200000d0 = 0);
    NONFAILING(*(uint32_t*)0x200000d8 = 0);
    NONFAILING(*(uint32_t*)0x200000dc = 0);
    NONFAILING(*(uint64_t*)0x200000e0 = 0);
    NONFAILING(*(uint32_t*)0x200000e8 = 0);
    NONFAILING(*(uint16_t*)0x200000ec = 0);
    NONFAILING(*(uint16_t*)0x200000ee = 0);
    res = syscall(__NR_perf_event_open, 0x20000080, 0, 0, -1, 0);
    if (res != -1)
      r[2] = res;
    break;
  case 5:
    NONFAILING(*(uint32_t*)0x20000040 = 2);
    NONFAILING(*(uint32_t*)0x20000044 = 0x70);
    NONFAILING(*(uint8_t*)0x20000048 = 0x15);
    NONFAILING(*(uint8_t*)0x20000049 = 1);
    NONFAILING(*(uint8_t*)0x2000004a = 0);
    NONFAILING(*(uint8_t*)0x2000004b = 0);
    NONFAILING(*(uint32_t*)0x2000004c = 0);
    NONFAILING(*(uint64_t*)0x20000050 = 0);
    NONFAILING(*(uint64_t*)0x20000058 = 0);
    NONFAILING(*(uint64_t*)0x20000060 = 0);
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 0, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 1, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 2, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 3, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 4, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 5, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 6, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 7, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 8, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 9, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 10, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 11, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 12, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 13, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 14, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 15, 2));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 17, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 18, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 19, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 20, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 21, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 22, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 23, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 24, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 25, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 26, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 27, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 28, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 29, 35));
    NONFAILING(*(uint32_t*)0x20000070 = 0);
    NONFAILING(*(uint32_t*)0x20000074 = 0);
    NONFAILING(*(uint64_t*)0x20000078 = 0);
    NONFAILING(*(uint64_t*)0x20000080 = 0);
    NONFAILING(*(uint64_t*)0x20000088 = 0);
    NONFAILING(*(uint64_t*)0x20000090 = 0);
    NONFAILING(*(uint32_t*)0x20000098 = 0);
    NONFAILING(*(uint32_t*)0x2000009c = 0);
    NONFAILING(*(uint64_t*)0x200000a0 = 0);
    NONFAILING(*(uint32_t*)0x200000a8 = 0);
    NONFAILING(*(uint16_t*)0x200000ac = 0);
    NONFAILING(*(uint16_t*)0x200000ae = 0);
    syscall(__NR_perf_event_open, 0x20000040, 0, 0, -1, 0);
    break;
  case 6:
    syscall(__NR_close, r[2]);
    break;
  case 7:
    syscall(__NR_socket, 2, 3, 2);
    break;
  case 8:
    syscall(__NR_ioctl, r[2], 0x8912, 0x400200);
    break;
  case 9:
    NONFAILING(*(uint32_t*)0x2025c000 = 2);
    NONFAILING(*(uint32_t*)0x2025c004 = 0x70);
    NONFAILING(*(uint8_t*)0x2025c008 = 0xe2);
    NONFAILING(*(uint8_t*)0x2025c009 = 0);
    NONFAILING(*(uint8_t*)0x2025c00a = 0);
    NONFAILING(*(uint8_t*)0x2025c00b = 0);
    NONFAILING(*(uint32_t*)0x2025c00c = 0);
    NONFAILING(*(uint64_t*)0x2025c010 = 0);
    NONFAILING(*(uint64_t*)0x2025c018 = 0);
    NONFAILING(*(uint64_t*)0x2025c020 = 0);
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 0, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 1, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 2, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 3, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 4, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 5, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 6, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 7, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 8, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 9, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 10, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 11, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 12, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 13, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 14, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 15, 2));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 17, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 18, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 19, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 20, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 21, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 22, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 23, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 24, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 25, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 26, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 27, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 28, 1));
    NONFAILING(STORE_BY_BITMASK(uint64_t, 0x2025c028, 0, 29, 35));
    NONFAILING(*(uint32_t*)0x2025c030 = 0);
    NONFAILING(*(uint32_t*)0x2025c034 = 0);
    NONFAILING(*(uint64_t*)0x2025c038 = 0);
    NONFAILING(*(uint64_t*)0x2025c040 = 0);
    NONFAILING(*(uint64_t*)0x2025c048 = 0);
    NONFAILING(*(uint64_t*)0x2025c050 = 0);
    NONFAILING(*(uint32_t*)0x2025c058 = 0);
    NONFAILING(*(uint32_t*)0x2025c05c = 0);
    NONFAILING(*(uint64_t*)0x2025c060 = 0);
    NONFAILING(*(uint32_t*)0x2025c068 = 0);
    NONFAILING(*(uint16_t*)0x2025c06c = 0);
    NONFAILING(*(uint16_t*)0x2025c06e = 0);
    res = syscall(__NR_perf_event_open, 0x2025c000, 0, 0, -1, 0);
    if (res != -1)
      r[3] = res;
    break;
  case 10:
    syscall(__NR_close, r[3]);
    break;
  case 11:
    syscall(__NR_socket, 2, 3, 2);
    break;
  case 12:
    NONFAILING(memcpy(
        (void*)0x20000780,
        "\x6e\x72\x30\x01\x00\x60\xa1\x9e\xf9\xd2\xc6\x73\xd9\xa1\x57\x1c\xb9"
        "\xe1\x36\x9b\xcd\x61\xef\x7e\x49\x79\x3a\xe1\x87\x12\xec\xeb\x1d\xaa"
        "\x76\x94\x97\x80\x0b\x7f\xbb\xd3\x5b\x17\x0c\x10\x75\x1d\x39\xae\xb6"
        "\x60\xd8\x63\xe4\x9b\x8c\x4f\x3b\x3d\xad\x48\x90\x2b\x5b\x2d\x6c\xfd"
        "\x0a\xbd\x37\x2c\x63\xbc\xf5\xd7\x0d\xf3\xfd\x4d\x2e\x8d\x44\x3c\x88"
        "\xbc\x0e\x56\x37\xdd\x82\xfc\x34\x35\xbe\xd4\xde\x5d\x69\x3c\x9a\x78"
        "\x1c\x86\x3e\x05\xd8\xa6\xf8\x68\x9a\x5b\xe2\x92\x16\x06\x1f\x3f\xf5"
        "\x3f\x8b\x6b\x39\x66\x78\xe7\xba\x15\x5e\xf9\x15\x2d\x7e\x43\xb1\xec"
        "\xcb\x23\x31\xeb\x8e\xb1\xed\x55\x86\xdc\xf8\xb3\xb0\xb9\x99\x36\x1a"
        "\x44\xff\x2c\x22\xc2\xab\xbe\xf4\x2d\xd2\x4e\xab\xe6\x72\x33\x46\xa6"
        "\xe4\x6c\x04\x99\xa2\x14\x42\xd8\xd0\x0d\xcb\x57\xf0\x13\xff\x75\x95"
        "\xed\xd0\xff\x07\x69\x30\xde\x36\x75\xd3\x41\x17\xa4\x4e\xb0\xe4\xf8"
        "\x32\x93\x6d\xa4\x4e\x57\xe4\x3a\x3e\x36\xbd\x48\xd2\xa8\x5b\xf4\xfd"
        "\x4a\x80\x4e\x83\xf2\xf3\xcf\x37\x8a\x43\x5a\xf5\xe2\x87\xd4\xe2\x73"
        "\x37\xb4\xad\xa1\x1b\x26\x21\x98\x32\xec\x6b\x2b\x38\x44\x6b\x3b\x95"
        "\xfe\x37\x71\xe9\xf4\x2c\xa3\x0f\xb2\x1e\x12\xf0\xa3\xd8\xbc\x2d\x85"
        "\x45\x4a\xf9\xfc\xc0\x23\x2d\x8f\xd9\x09\x44\x8b\x01\xf4\x6c\x59\x3d"
        "\x31\xea\x1c\x92\x64\x65\xe3\x5a\x41\x99\x07\x9c\x3c\xa4\x11\x28\xb1"
        "\x7c\xb0\x1f\xbf\x5b\x52\x2b\xe0\xfd\x02\x02\x2a\xda\x37\xfe\xcc\x14"
        "\xb6\xc8\xc8\x83\x18\x83\xb8\x5a\x11\x06\xf2\xf8\x67\x02\x0d\x52\x9f"
        "\x17\xa3\x50\xf2\x0d\xd3\xbf\x51\xa9\x8c\xfd\xa7\x0c\x2e\x36\x38\xa4"
        "\x83\xfd\x3f\x87\x94\x0b\xb4\x78\xb0\x7c\x4c\x11\x03\x94\xc0\x09\x3d"
        "\x17\x95\x50\x89\xf2\xca\x97\xbb\xe0\x75\x12\x4c\x9b\x1f\xf6\x50\x0d"
        "\x53\x6a\x95\xd9\x6f\x03\xd4\x85\x96\xe0\x08\xbf\x0a\x02\x8b\x53\x9c"
        "\xec\x79\x6c\xec\x9b\xf5\x85\xeb\x80\xfe\x3e\x0d\x26",
        421));
    syscall(__NR_ioctl, r[3], 0x8914, 0x20000780);
    break;
  case 13:
    NONFAILING(*(uint32_t*)0x20000040 = -1);
    NONFAILING(*(uint32_t*)0x20000044 = 0x28);
    NONFAILING(*(uint64_t*)0x20000048 = 0x20000240);
    syscall(__NR_bpf, 0xf, 0x20000040, 0x3ba);
    break;
  case 14:
    NONFAILING(memcpy((void*)0x20001a00, "/dev/net/tun", 13));
    res = syscall(__NR_openat, 0xffffffffffffff9c, 0x20001a00, 2, 0);
    if (res != -1)
      r[4] = res;
    break;
  case 15:
    NONFAILING(memcpy(
        (void*)0x20000300,
        "\x6e\x72\x30\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00",
        16));
    NONFAILING(*(uint16_t*)0x20000310 = 0x1132);
    syscall(__NR_ioctl, r[4], 0x400454ca, 0x20000300);
    break;
  case 16:
    NONFAILING(*(uint32_t*)0x20000340 = r[1]);
    NONFAILING(*(uint64_t*)0x20000348 = 0x200001c0);
    NONFAILING(
        memcpy((void*)0x200001c0,
               "\x8e\x0c\xe5\xdc\x17\xf8\x17\x8b\xfc\x00\x35\x1e\x96\xf5\xf2"
               "\x41\xc2\xc1\xfb\xad\x26\xf8\x2b\x18\xdf\xed\x83\xa9\x8e\xa1"
               "\x3e\x4d\x90\xfb\xfc\xe4\x0e\x67\x29\x78\x66\x23\xa7\xae\xbc"
               "\xe3\xaf\x15\x1b\x85\x83\x1f\xdf\xa0\x20\x91\xa1\xa2\x46\x61"
               "\xa0\xda\x3e\x51\x11\xe6\x9a\xe8\x78\xd6\x4c\x71\xc6\x01\xd9"
               "\x92\x3f\xc7\x0f\xc6\x42\xcb\xec\x33\x84\x77\x36\x68\x0e\x59"
               "\x83\x4f\xb1\xcc\x02\xdb\x56\x32\x60\xac\xaf\x53\x76",
               103));
    NONFAILING(*(uint64_t*)0x20000350 = 0x20000280);
    syscall(__NR_bpf, 4, 0x20000340, 0x18);
    break;
  case 17:
    NONFAILING(sprintf((char*)0x20000000, "0x%016llx", (long long)0));
    syscall(__NR_write, r[4], 0x20000000, 0x17b);
    break;
  }
}
int main(void)
{
  syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0);
  install_segv_handler();
  for (procid = 0; procid < 6; procid++) {
    if (fork() == 0) {
      use_temporary_dir();
      do_sandbox_none();
    }
  }
  sleep(1000000);
  return 0;
}