// https://syzkaller.appspot.com/bug?id=fb3d5ed66d40353df9475fbbd7e4dd0b34cb915a
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <dirent.h>
#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <net/if.h>
#include <netinet/in.h>
#include <pthread.h>
#include <sched.h>
#include <setjmp.h>
#include <signal.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/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/futex.h>
#include <linux/loop.h>
#include <linux/net.h>

#ifndef __NR_dup
#define __NR_dup 23
#endif
#ifndef __NR_memfd_create
#define __NR_memfd_create 279
#endif
#ifndef __NR_mmap
#define __NR_mmap 222
#endif
#ifndef __NR_mount
#define __NR_mount 40
#endif
#ifndef __NR_openat
#define __NR_openat 56
#endif
#ifndef __NR_pipe2
#define __NR_pipe2 59
#endif
#ifndef __NR_write
#define __NR_write 64
#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 thread_start(void* (*fn)(void*), void* arg)
{
  pthread_t th;
  pthread_attr_t attr;
  pthread_attr_init(&attr);
  pthread_attr_setstacksize(&attr, 128 << 10);
  int i = 0;
  for (; i < 100; i++) {
    if (pthread_create(&th, &attr, fn, arg) == 0) {
      pthread_attr_destroy(&attr);
      return;
    }
    if (errno == EAGAIN) {
      usleep(50);
      continue;
    }
    break;
  }
  exit(1);
}

typedef struct {
  int state;
} event_t;

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

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

static void event_set(event_t* ev)
{
  if (ev->state)
    exit(1);
  __atomic_store_n(&ev->state, 1, __ATOMIC_RELEASE);
  syscall(SYS_futex, &ev->state, FUTEX_WAKE | FUTEX_PRIVATE_FLAG, 1000000);
}

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

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

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

static bool write_file(const char* file, const char* what, ...)
{
  char buf[1024];
  va_list args;
  va_start(args, what);
  vsnprintf(buf, sizeof(buf), what, args);
  va_end(args);
  buf[sizeof(buf) - 1] = 0;
  int len = strlen(buf);
  int fd = open(file, O_WRONLY | O_CLOEXEC);
  if (fd == -1)
    return false;
  if (write(fd, buf, len) != len) {
    int err = errno;
    close(fd);
    errno = err;
    return false;
  }
  close(fd);
  return true;
}

#define MAX_FDS 30

struct fs_image_segment {
  void* data;
  uintptr_t size;
  uintptr_t offset;
};
static int setup_loop_device(long unsigned size, long unsigned nsegs,
                             struct fs_image_segment* segs,
                             const char* loopname, int* memfd_p, int* loopfd_p)
{
  int err = 0, loopfd = -1;
  int memfd = syscall(__NR_memfd_create, "syzkaller", 0);
  if (memfd == -1) {
    err = errno;
    goto error;
  }
  if (ftruncate(memfd, size)) {
    err = errno;
    goto error_close_memfd;
  }
  for (size_t i = 0; i < nsegs; i++) {
    if (pwrite(memfd, segs[i].data, segs[i].size, segs[i].offset) < 0) {
    }
  }
  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;
    }
  }
  *memfd_p = memfd;
  *loopfd_p = loopfd;
  return 0;

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

static long syz_mount_image(volatile long fsarg, volatile long dir,
                            volatile unsigned long size,
                            volatile unsigned long nsegs,
                            volatile long segments, volatile long flags,
                            volatile long optsarg, volatile long change_dir)
{
  struct fs_image_segment* segs = (struct fs_image_segment*)segments;
  int res = -1, err = 0, loopfd = -1, memfd = -1, need_loop_device = !!segs;
  char* mount_opts = (char*)optsarg;
  char* target = (char*)dir;
  char* fs = (char*)fsarg;
  char* source = NULL;
  char loopname[64];
  if (need_loop_device) {
    memset(loopname, 0, sizeof(loopname));
    snprintf(loopname, sizeof(loopname), "/dev/loop%llu", procid);
    if (setup_loop_device(size, nsegs, segs, loopname, &memfd, &loopfd) == -1)
      return -1;
    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) {
    if (strstr(opts, "errors=panic") || strstr(opts, "errors=remount-ro") == 0)
      strcat(opts, ",errors=continue");
  } else if (strcmp(fs, "xfs") == 0) {
    strcat(opts, ",nouuid");
  }
  res = mount(source, target, fs, flags, opts);
  if (res == -1) {
    err = errno;
    goto error_clear_loop;
  }
  res = open(target, O_RDONLY | O_DIRECTORY);
  if (res == -1) {
    err = errno;
    goto error_clear_loop;
  }
  if (change_dir) {
    res = chdir(target);
    if (res == -1) {
      err = errno;
    }
  }

error_clear_loop:
  if (need_loop_device) {
    ioctl(loopfd, LOOP_CLR_FD, 0);
    close(loopfd);
    close(memfd);
  }
  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:
      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");
  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()
{
  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();
  write_file("/proc/self/oom_score_adj", "1000");
}

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

static void setup_usb()
{
  if (chmod("/dev/raw-gadget", 0666))
    exit(1);
}

static void setup_sysctl()
{
  char mypid[32];
  snprintf(mypid, sizeof(mypid), "%d", getpid());
  struct {
    const char* name;
    const char* data;
  } files[] = {
      {"/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", mypid},
  };
  for (size_t i = 0; i < sizeof(files) / sizeof(files[0]); i++) {
    if (!write_file(files[i].name, files[i].data))
      printf("write to %s failed: %s\n", files[i].name, strerror(errno));
  }
}

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;
  for (call = 0; call < 10; 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 (call == 2 || call == 4 || call == 6 || call == 8)
        break;
      event_timedwait(&th->done, 50 + (call == 2 ? 50 : 0));
      break;
    }
  }
  for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++)
    sleep_ms(1);
  close_fds();
}

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();
      exit(0);
    }
    int status = 0;
    uint64_t start = current_time_ms();
    for (;;) {
      if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid)
        break;
      sleep_ms(1);
      if (current_time_ms() - start < 5000)
        continue;
      kill_and_wait(pid, &status);
      break;
    }
  }
}

uint64_t r[4] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff,
                 0xffffffffffffffff};

void execute_call(int call)
{
  intptr_t res = 0;
  switch (call) {
  case 0:
    NONFAILING(memcpy((void*)0x20000000, "/proc/self/exe\000", 15));
    res = syscall(__NR_openat, 0xffffff9c, 0x20000000ul, 0ul, 0ul);
    if (res != -1)
      r[0] = res;
    break;
  case 1:
    syscall(__NR_mmap, 0x20000000ul, 0x800000ul, 0x1800003ul, 0x12ul, r[0],
            0ul);
    break;
  case 2:
    NONFAILING(memcpy((void*)0x20000080, "./file0\000", 8));
    NONFAILING(*(uint64_t*)0x20001740 = 0x20000240);
    NONFAILING(memcpy((void*)0x20000240, "\xd7\x1d\xeb\x19\xd2", 5));
    NONFAILING(*(uint64_t*)0x20001748 = 5);
    NONFAILING(*(uint64_t*)0x20001750 = 3);
    NONFAILING(*(uint64_t*)0x20001758 = 0x200006c0);
    NONFAILING(memcpy(
        (void*)0x200006c0,
        "\xa5\xe6\x36\x36\xf3\xcb\xeb\xef\x08\x63\x8e\xdd\x8f\x63\xf5\x09\x7f"
        "\xc1\xce\xbd\xa2\x35\xfd\x1c\xc2\x6a\xe3\x4c\xa5\xa4\xe9\x53\x0f\xa8"
        "\x9c\x2c\xb4\x0a\xf5\x08\xb7\x10\x79\x52\x4e\x36\x2c\xbc\x25\xf7\x2a"
        "\x6a\xab\x12\x19\x8a\xa8\xd6\xd9\x5a\x0a\xf7\x7d\x00\x22\xcf\xea\x38"
        "\x19\xba\x0a\xe8\x5f\x63\x96\x80\x34\xb8\x22\x5d\x84\xdc\x49\xd0\x53"
        "\xd9\xbc\xe4\x07\xf7\xe1\x19\xba\x5e\x70\x9c\x01\x41\xc4\xcc\x82\xc2"
        "\x46\xb2\x36\xa8\x23\xcd\x66\x42\xa5\x1e\xd6\x47\xca\x7c\x3e\x10\xb3"
        "\x16\x2f\x40\xa2\xca\x2e\xd2\x53\x68\x19\xee\x8f\x16\x36\x3e\xb0\xab"
        "\x34\x72\x61\x83\x95\x88\x1a\x82\xda\x70\xfc\xf5\xbb\xa5\x90\xa0\x55"
        "\x3a\xe6\x1e\x9f\xd2\xae\x41\xfa\xaf\x8a\x1f\xfb\x0e\x38\x9e\x49\xf0"
        "\xf3\xe4\xeb\xa5\x5a\x55\xf1\x2c\x80\xfb\x58\x9b\xd5\xf5\x6a\xb8\xac"
        "\x9f\xf9\x7c\x4c\x09\x6d\xc5\xad\x38\x50\x72\x2e\x01\x2a\x3a\x73\x6d"
        "\x75\x81\xe0\x89\x67\x49\x2f\x89\xbf\x4f\x63\x7a\x69\xe9\xd7\x26\x2a"
        "\x96\x65\x91\xd7\xac\x46\x9e\xc8\x13\x80\xab\xe8\x14\x36\x3d\xae\x93"
        "\x35\xa1\x19\x93\x91\xb7\xa3\x1d\x1c\x6c",
        248));
    NONFAILING(*(uint64_t*)0x20001760 = 0xf8);
    NONFAILING(*(uint64_t*)0x20001768 = 8);
    NONFAILING(*(uint64_t*)0x20001770 = 0x20000400);
    NONFAILING(memcpy(
        (void*)0x20000400,
        "\x46\xc0\xfa\xf9\xb7\xdb\xe0\x3f\xe5\x61\x8f\x08\x08\x87\x2d\x1e\xd2"
        "\xfe\xba\x1e\xbd\x1f\xef\x15\x72\x82\x6e\x65\x36\xee\x66\x97\xce\xb5"
        "\x6f\x70\x14\x78\x75\xf3\xbc\xa0\x89\xdb\xea\xb0\xd0\x4b\x8a\x0c\xcc"
        "\xb9\x3d\xb4\x77\x27\x60\x64\x06\x18\x0d\xf4\xa8\x4b\x07\x44\x80\xe1"
        "\xc5\xa1\x0f\x40\xd6\x3e\x3a\x5b\x20\x59\x13\xcf\x33\x62\x42\xda\x4c"
        "\xb2\xa7\xed\xa7\xf9\x54\xf0\x35\x6b\x6a\xc4\xc8\x86\xf5\xf3\x9b\x0e"
        "\xd9\xc6\xde\x8c\x96\xc1\xeb\xab\x18\xe3\x9c\x89\x9d\x6e\x5b\xee\xb1"
        "\xbe\x0c\xd9\x98\x9a\xff\x58\x8c\xa1\x66\xf7\xba\xbb\x20\xa4\x58\xf0"
        "\x76\xb0\x41\x34\x01\x19\x39\xf2\xf7\xbd\x0d\x8e\x81\x65\x39\x08\x51"
        "\x63\xe2\xd2\x21\x7e\x88\x5e\x92\x13\x1b\x0f\x17\x99\x66\xdc\xa6\xe0"
        "\x26\xe2\xac\x15\xf4\x5f",
        176));
    NONFAILING(*(uint64_t*)0x20001778 = 0xb0);
    NONFAILING(*(uint64_t*)0x20001780 = 0x100);
    NONFAILING(*(uint64_t*)0x20001788 = 0x200004c0);
    NONFAILING(memcpy(
        (void*)0x200004c0,
        "\x82\xc8\x96\x0c\x0b\x1a\x3f\xc1\xbb\x5a\xff\x64\x1e\xda\xcc\xd6\xbd"
        "\x08\x8e\xa8\x63\x00\xc8\xe0\xce\x55\xb2\x47\x9f\xc2\x55\x1d\x9e\xe1"
        "\x95\x7c\x06\x01\x2e\xb5\x59\xc3\x39\xc2\x98\xa8\xc5\x3b\xa2\xf8\x69"
        "\x9c\x59\xbe\xad\xba\x63\x8b\xc7\xb3\x0e\xfa\x8e\x86\x25\x0c\x5c\xb5"
        "\xdf\xa3\xfb\x38\x2e\xfc\x0d\x45\x82\xb1\x5a\x84\x06\x73\x51\x14\x3f"
        "\xd5\xd5\x38\xec\xc5\x00\x33\x42\xc4\x3b\xbc\x91\xd9\x47\xf4\x6b\xe1"
        "\x5c\x12\xbe\xed\x28\x57\x02\x2f\xed\xcd\x78\xd2\x80\xbf\xf4\x5f\xd3"
        "\x78\x6e\x8a\x65\x0b\x08\x76\xa7\x1b\x53\xf5\x55\x3b\x96\xae\x60\xb6"
        "\xbe\xd1\x41\xdd\x47\x21\x34\xd2\x89\xb8\xa5\x5e\xbb\xb9\x44\xdf\x2c"
        "\x5b\x7c\xe3\xe1\x1e\x42\x4f\x93\x30\x36\xf9\xfc\xcb\x45\x55\x16\x5f"
        "\x32\x22\xa1\x25\x69\x1d\xac\xe3\x89\xb3\x71\x7b\x72\x02\x12\x52\x9b"
        "\x63\x7c\xdf\xc8\x4f\xa4\x62\xe7\xe3\xce\x14\xa1\xa7\x07\xf6\x03\xab"
        "\x6c\xf0\xf0\xca\x35\xe9\x27\x5f\x30\x6e\x47\x47\x16\x88\xe5\x11\x75"
        "\xaf\xc6\x3f\xac\x2d\xe5\x90\xe8\x18\xcd\x89\xda\x30\x4b\x7b\x48\xe5"
        "\xf1\xe5\x5b\xf1\x16\xc2\x0f\x1a\x70\xad\x75\x84\x50\xf0\xcb\xca",
        254));
    NONFAILING(*(uint64_t*)0x20001790 = 0xfe);
    NONFAILING(*(uint64_t*)0x20001798 = 0xfff);
    NONFAILING(*(uint64_t*)0x200017a0 = 0x200017c0);
    NONFAILING(memcpy(
        (void*)0x200017c0,
        "\xf0\x4b\x09\xef\x99\xfa\x47\x3c\xe0\xea\xa7\x0a\x6d\x2a\xf6\x33\x12"
        "\xe5\xe6\x8c\x29\xc9\xe1\xc5\x6f\x5a\xcc\x60\xd0\xf7\x3a\xf0\x26\x97"
        "\x80\xc6\xfd\xcc\x5d\xa2\x1d\x38\x96\xba\x8e\xb2\x47\x75\xa1\x36\xff"
        "\xb4\x41\xb6\x9d\x6e\x2d\x59\x78\x5e\x56\x75\x20\xa5\xde\xee\x19\x4e"
        "\x1f\xf4\xa6\x9b\x0d\xb1\xbe\x71\x24\xd0\xf2\x5a\xd4\x41\x3d\xac\x54"
        "\x06\x7d\xaa\x11\x5f\xe6\xb3\x36\x76\xcf\xdd\xde\xbf\x19\xe4\x09\x32"
        "\xfc\xe3\xf9\xdb\x80\xee\xb9\x76\xda\x46\x92\x01\x24\x85\xf6\x0c\x72"
        "\x9f\x02\x45\xed\xc6\x3c\x60\x7e\x3b\xbe\x29\x3f\xd6\xf0\x17\xd4\x30"
        "\xe4\xd0\xca\x1c\xb5\x9f\x9c\xc6\x6e\xab\x66\x1d\x48\x22\xc7\x03\xfa"
        "\x74\x99\xf8\x7b\x9c\xf5\x15\x65\x39\x3f\x2b\xb0\x46\x23\xf8\x8e\x02"
        "\x3b\x1d\xde\xf3\x51\xbb\x7b\xc1\x80\x23\xfb\xa8\x97\x18\x05\x2c\x86"
        "\xaa\x9c\xc3\x5f\xba\x36\xa9\xef\x68\x3f\x07\x3d\x5d\xae\x2b\x35\x38"
        "\xec\x1a\x4e\x24\x1c\x56\x21\xf4\xbd\x66\xae\xa0\x00\x93\x97\x6a\xa3"
        "\x26\xac\x10\x6e\x8d\xd9\x9d\x0f\xa1\xa9\x3b\xe3\x44\xf8\x04\xc8\xb1"
        "\x90\x32\xe2\x99\x66\xeb\x06\x00\x6a\x1f\x40\x2c\x42\xa9\x4c\x65\x00"
        "\xbb\x04\x45\x0f\x1e\x72\xca\x2d\x47\xe9\x2e\x4e\x23\x04\x8c\xab\x16"
        "\xe1\xa5\x22\xdd\x8b\xda\xd7\x65\x69\x86\xd9\x68\x91\xd4\x3c\xb4\xc5"
        "\x2f\x44\x1d\x0c\x5d\x1b\xe4\xd7\x7d\x4f\xe0\x2a\x12\x2b\xc5\x81\x6c"
        "\x10\x35\xd1\x4a\x3f\xc2\x82\xef\x82\xcf\x7d\xd3\xcc\x0a\x2f\x36\x96"
        "\x02\x73\x42\xac\x4a\x81\x51\xd3\x0c\xcb\x2a\x67\xa6\x88\x1e\x25\x16"
        "\x7d",
        341));
    NONFAILING(*(uint64_t*)0x200017a8 = 0x155);
    NONFAILING(*(uint64_t*)0x200017b0 = 0xa4c2);
    NONFAILING(*(uint64_t*)0x200017b8 = 0x20000340);
    NONFAILING(memcpy(
        (void*)0x20000340,
        "\x23\x88\xdc\x2a\xc6\xc4\x6f\x62\xb4\x3c\xe5\x7f\x44\x0c\x82\x60\x3d"
        "\xe8\x22\x56\x96\xf1\xf3\xcd\xe0\x2d\x9b\x3b\xb3\x75\x1d\xd8\x48\xc3"
        "\xcf\xf7\x39\xcb\x15\xba\x37\xeb\xc4\xba\x67\xa4\xb3\x16\xc5\x26\x75"
        "\x6f\x66\xc0\xe2\x64\x79\xa7\xd2\x2e\xd4\xe8\x4b\x6d",
        64));
    NONFAILING(*(uint64_t*)0x200017c0 = 0x40);
    NONFAILING(*(uint64_t*)0x200017c8 = 0xd998);
    NONFAILING(
        syz_mount_image(0, 0x20000080, 0xd9d8, 6, 0x20001740, 0x800, 0, 0));
    break;
  case 3:
    res = syscall(__NR_pipe2, 0x20000180ul, 0ul);
    if (res != -1) {
      NONFAILING(r[1] = *(uint32_t*)0x20000180);
      NONFAILING(r[2] = *(uint32_t*)0x20000184);
    }
    break;
  case 4:
    NONFAILING(memcpy((void*)0x20000000, "\x15\x00\x00\x00\x65\xff\xff", 7));
    syscall(__NR_write, r[2], 0x20000000ul, 0x15ul);
    break;
  case 5:
    res = syscall(__NR_dup, r[2]);
    if (res != -1)
      r[3] = res;
    break;
  case 6:
    NONFAILING(memcpy((void*)0x20000040, "./file0\000", 8));
    NONFAILING(memcpy((void*)0x200001c0, "9p\000", 3));
    NONFAILING(memcpy((void*)0x20000300, "trans=fd,", 9));
    NONFAILING(memcpy((void*)0x20000309, "rfdno", 5));
    NONFAILING(*(uint8_t*)0x2000030e = 0x3d);
    NONFAILING(sprintf((char*)0x2000030f, "0x%016llx", (long long)r[1]));
    NONFAILING(*(uint8_t*)0x20000321 = 0x2c);
    NONFAILING(memcpy((void*)0x20000322, "wfdno", 5));
    NONFAILING(*(uint8_t*)0x20000327 = 0x3d);
    NONFAILING(sprintf((char*)0x20000328, "0x%016llx", (long long)r[3]));
    NONFAILING(*(uint8_t*)0x2000033a = 0x2c);
    NONFAILING(*(uint8_t*)0x2000033b = 0);
    syscall(__NR_mount, 0ul, 0x20000040ul, 0x200001c0ul, 0ul, 0x20000300ul);
    break;
  case 7:
    syscall(__NR_write, r[3], 0ul, 0ul);
    break;
  case 8:
    NONFAILING(memcpy((void*)0x20000200, "\xb0\x00\x00\x00\x00\x00\x00", 7));
    NONFAILING(*(uint64_t*)0x20000207 = -1);
    syscall(__NR_write, r[3], 0x20000200ul, 0xb0ul);
    {
      int i;
      for (i = 0; i < 32; i++) {
        syscall(__NR_write, r[3], 0x20000200ul, 0xb0ul);
      }
    }
    break;
  case 9:
    NONFAILING(memcpy((void*)0x200002c0, "./file0\000", 8));
    NONFAILING(memcpy((void*)0x200000c0, "9p\000", 3));
    NONFAILING(memcpy((void*)0x200003c0, "trans=fd,", 9));
    NONFAILING(memcpy((void*)0x200003c9, "rfdno", 5));
    NONFAILING(*(uint8_t*)0x200003ce = 0x3d);
    NONFAILING(sprintf((char*)0x200003cf, "0x%016llx", (long long)r[1]));
    NONFAILING(*(uint8_t*)0x200003e1 = 0x2c);
    NONFAILING(memcpy((void*)0x200003e2, "wfdno", 5));
    NONFAILING(*(uint8_t*)0x200003e7 = 0x3d);
    NONFAILING(sprintf((char*)0x200003e8, "0x%016llx", (long long)r[2]));
    NONFAILING(*(uint8_t*)0x200003fa = 0x2c);
    NONFAILING(*(uint8_t*)0x200003fb = 0);
    syscall(__NR_mount, 0ul, 0x200002c0ul, 0x200000c0ul, 0ul, 0x200003c0ul);
    {
      int i;
      for (i = 0; i < 32; i++) {
        syscall(__NR_mount, 0ul, 0x200002c0ul, 0x200000c0ul, 0ul, 0x200003c0ul);
      }
    }
    break;
  }
}
int main(void)
{
  syscall(__NR_mmap, 0x1ffff000ul, 0x1000ul, 0ul, 0x32ul, -1, 0ul);
  syscall(__NR_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x32ul, -1, 0ul);
  syscall(__NR_mmap, 0x21000000ul, 0x1000ul, 0ul, 0x32ul, -1, 0ul);
  setup_sysctl();
  setup_usb();
  install_segv_handler();
  for (procid = 0; procid < 6; procid++) {
    if (fork() == 0) {
      do_sandbox_none();
    }
  }
  sleep(1000000);
  return 0;
}