// https://syzkaller.appspot.com/bug?id=15631d6cf59940a001754b2b197c208abc798221
// 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 <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/swap.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/falloc.h>
#include <linux/net.h>

#ifndef __NR_bpf
#define __NR_bpf 321
#endif

static unsigned long long procid;

static __thread int clone_ongoing;
static __thread int skip_segv;
static __thread jmp_buf segv_env;

static void segv_handler(int sig, siginfo_t* info, void* ctx)
{
  if (__atomic_load_n(&clone_ongoing, __ATOMIC_RELAXED) != 0) {
    exit(sig);
  }
  uintptr_t addr = (uintptr_t)info->si_addr;
  const uintptr_t prog_start = 1 << 20;
  const uintptr_t prog_end = 100 << 20;
  int skip = __atomic_load_n(&skip_segv, __ATOMIC_RELAXED) != 0;
  int valid = addr < prog_start || addr > prog_end;
  if (skip && valid) {
    _longjmp(segv_env, 1);
  }
  exit(sig);
}

static void install_segv_handler(void)
{
  struct sigaction sa;
  memset(&sa, 0, sizeof(sa));
  sa.sa_handler = SIG_IGN;
  syscall(SYS_rt_sigaction, 0x20, &sa, NULL, 8);
  syscall(SYS_rt_sigaction, 0x21, &sa, NULL, 8);
  memset(&sa, 0, sizeof(sa));
  sa.sa_sigaction = segv_handler;
  sa.sa_flags = SA_NODEFER | SA_SIGINFO;
  sigaction(SIGSEGV, &sa, NULL);
  sigaction(SIGBUS, &sa, NULL);
}

#define NONFAILING(...)                                                        \
  ({                                                                           \
    int ok = 1;                                                                \
    __atomic_fetch_add(&skip_segv, 1, __ATOMIC_SEQ_CST);                       \
    if (_setjmp(segv_env) == 0) {                                              \
      __VA_ARGS__;                                                             \
    } else                                                                     \
      ok = 0;                                                                  \
    __atomic_fetch_sub(&skip_segv, 1, __ATOMIC_SEQ_CST);                       \
    ok;                                                                        \
  })

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

static void 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)) {
  }
}

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);
}

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

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

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

static void reset_loop()
{
  reset_net_namespace();
}

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

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[] = {
      {"/sys/kernel/debug/x86/nmi_longest_ns", "10000000000"},
      {"/proc/sys/kernel/hung_task_check_interval_secs", "20"},
      {"/proc/sys/net/core/bpf_jit_kallsyms", "1"},
      {"/proc/sys/net/core/bpf_jit_harden", "0"},
      {"/proc/sys/kernel/kptr_restrict", "0"},
      {"/proc/sys/kernel/softlockup_all_cpu_backtrace", "1"},
      {"/proc/sys/fs/mount-max", "100"},
      {"/proc/sys/vm/oom_dump_tasks", "0"},
      {"/proc/sys/debug/exception-trace", "0"},
      {"/proc/sys/kernel/printk", "7 4 1 3"},
      {"/proc/sys/kernel/keys/gc_delay", "1"},
      {"/proc/sys/vm/oom_kill_allocating_task", "1"},
      {"/proc/sys/kernel/ctrl-alt-del", "0"},
      {"/proc/sys/kernel/cad_pid", 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));
  }
}

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

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

static void execute_one(void);

#define WAIT_FLAGS __WALL

static void loop(void)
{
  setup_loop();
  int iter = 0;
  for (;; iter++) {
    char cwdbuf[32];
    sprintf(cwdbuf, "./%d", iter);
    if (mkdir(cwdbuf, 0777))
      exit(1);
    reset_loop();
    int pid = fork();
    if (pid < 0)
      exit(1);
    if (pid == 0) {
      if (chdir(cwdbuf))
        exit(1);
      setup_test();
      execute_one();
      close_fds();
      exit(0);
    }
    int status = 0;
    uint64_t start = current_time_ms();
    for (;;) {
      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;
    }
    remove_dir(cwdbuf);
  }
}

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

void execute_one(void)
{
  intptr_t res = 0;
  NONFAILING(*(uint32_t*)0x20000340 = 2);
  NONFAILING(*(uint32_t*)0x20000344 = 4);
  NONFAILING(*(uint32_t*)0x20000348 = 8);
  NONFAILING(*(uint32_t*)0x2000034c = 1);
  NONFAILING(*(uint32_t*)0x20000350 = 0x80);
  NONFAILING(*(uint32_t*)0x20000354 = -1);
  NONFAILING(*(uint32_t*)0x20000358 = 0);
  NONFAILING(memset((void*)0x2000035c, 0, 16));
  NONFAILING(*(uint32_t*)0x2000036c = 0);
  NONFAILING(*(uint32_t*)0x20000370 = -1);
  NONFAILING(*(uint32_t*)0x20000374 = 0);
  NONFAILING(*(uint32_t*)0x20000378 = 0);
  NONFAILING(*(uint32_t*)0x2000037c = 0);
  NONFAILING(*(uint64_t*)0x20000380 = 0);
  res = syscall(__NR_bpf, /*cmd=*/0ul, /*arg=*/0x20000340ul, /*size=*/0x48ul);
  if (res != -1)
    r[0] = res;
  NONFAILING(*(uint32_t*)0x20001a80 = r[0]);
  syscall(__NR_bpf, /*cmd=*/0x16ul, /*arg=*/0x20001a80ul, /*size=*/4ul);
  NONFAILING(*(uint32_t*)0x200004c0 = 0x11);
  NONFAILING(*(uint32_t*)0x200004c4 = 0x18);
  NONFAILING(*(uint64_t*)0x200004c8 = 0x200001c0);
  NONFAILING(
      memcpy((void*)0x200001c0,
             "\x18\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
             "\xb7\x08\x00\x00\x00\x00\x00\x00\x7b\x8a\xf8\xff\x00\x00\x00\x00"
             "\xb7\x08\x00\x00\x00\x00\x00\x00\x7b\x8a\xf0\xff\x00\x00\x00\x00"
             "\xbf\xa1\x00\x00\x00\x00\x00\x00\x07\x01\x00\x00\xf8\xff\xff\xff"
             "\xbf\xa4\x00\x00\x00\x00\x00\x00\x07\x04\x00\x00\xf0\xff\xff\xff"
             "\xb7\x02\x00\x00\x00\x00\x00\x00\x18\x23\x00\x00",
             92));
  NONFAILING(*(uint32_t*)0x2000021c = r[0]);
  NONFAILING(memcpy(
      (void*)0x20000220,
      "\x00\x00\x00\x00\x00\x00\x00\x00\xb7\x05\x00\x00\x00\x00\x00\x00\x85\x00"
      "\x00\x00\xa5\x00\x00\x00\x18\x01\x00\x00\x20\x20\x64\x05\x00\x00\x00\x00"
      "\x00\x20\x20\x20\x7b\x1a\xf8\xff\x00\x00\x00\x00\xbf\xa1\x00\x00\x00\x00"
      "\x00\x00\x07\x01\x00\x00\xf8\xff\xff\xff\xb7\x02\x00\x00\x08\x00\x00\x00"
      "\xb7\x03\x00\x00\x00\x00\x00\x00\xa5\x00\x00\x00\x08\x00\x00\x00\x95",
      89));
  NONFAILING(*(uint64_t*)0x200004d0 = 0x20000600);
  NONFAILING(memcpy((void*)0x20000600, "GPL\000", 4));
  NONFAILING(*(uint32_t*)0x200004d8 = 0);
  NONFAILING(*(uint32_t*)0x200004dc = 0);
  NONFAILING(*(uint64_t*)0x200004e0 = 0);
  NONFAILING(*(uint32_t*)0x200004e8 = 0);
  NONFAILING(*(uint32_t*)0x200004ec = 0);
  NONFAILING(memset((void*)0x200004f0, 0, 16));
  NONFAILING(*(uint32_t*)0x20000500 = 0);
  NONFAILING(*(uint32_t*)0x20000504 = 0);
  NONFAILING(*(uint32_t*)0x20000508 = 0);
  NONFAILING(*(uint32_t*)0x2000050c = 0);
  NONFAILING(*(uint64_t*)0x20000510 = 0);
  NONFAILING(*(uint32_t*)0x20000518 = 0);
  NONFAILING(*(uint32_t*)0x2000051c = 0);
  NONFAILING(*(uint64_t*)0x20000520 = 0);
  NONFAILING(*(uint32_t*)0x20000528 = 0);
  NONFAILING(*(uint32_t*)0x2000052c = 0);
  NONFAILING(*(uint32_t*)0x20000530 = 0);
  NONFAILING(*(uint32_t*)0x20000534 = 0);
  NONFAILING(*(uint64_t*)0x20000538 = 0);
  NONFAILING(*(uint64_t*)0x20000540 = 0);
  NONFAILING(*(uint32_t*)0x20000548 = 0);
  NONFAILING(*(uint32_t*)0x2000054c = 0);
  res = syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x200004c0ul, /*size=*/0x90ul);
  if (res != -1)
    r[1] = res;
  NONFAILING(*(uint64_t*)0x20000540 = 0x20000500);
  NONFAILING(memcpy((void*)0x20000500, "mm_page_alloc\000", 14));
  NONFAILING(*(uint32_t*)0x20000548 = r[1]);
  syscall(__NR_bpf, /*cmd=*/0x11ul, /*arg=*/0x20000540ul, /*size=*/0x10ul);
  NONFAILING(*(uint32_t*)0x20000980 = 0x11);
  NONFAILING(*(uint32_t*)0x20000984 = 8);
  NONFAILING(*(uint64_t*)0x20000988 = 0x200019c0);
  NONFAILING(memcpy(
      (void*)0x200019c0,
      "\x62\x0a\xf8\xff\x0c\x20\x00\x21\xbf\xa1\x00\x00\x00\x00\x00\x00\x07\x01"
      "\x00\x00\xf8\xff\xff\xff\xb7\x02\x00\x00\x03\x00\x00\x00\xbd\x12\x00\x00"
      "\x00\x00\x00\x00\x85\x00\x00\x00\x06\x00\x00\x00\xb7\x00\x00\x00\x00\x00"
      "\x00\x00\x95\x00\x00\x00\x00\x00\x00\x00\x3f\xaf\x4f\x1e\x7f\x2a\xa3\xd9"
      "\xb1\x8e\xd8\x1c\x0c\x86\x9b\x51\xec\x6c\x0a\xf4\xe0\xe4\xa9\x44\x6c\x76"
      "\x70\x56\x89\x82\xb4\xe0\x20\xf6\x98\x39\x3a\xa0\xf3\x88\x1f\x9c\x24\xaa"
      "\x56\xf1\x51\x99\xfa\xd0\x09\x3c\x59\xd6\x6b\x5e\xce\x9f\x36\xc7\x0d\x0f"
      "\x13\x90\x5e\xa2\x3c\x22\x62\x4c\x9f\x87\xf9\x79\x3f\x50\xbb\x54\x60\x40"
      "\x67\x7b\x0c\x50\x77\xda\x80\xfb\x98\x2c\x1e\x94\x00\xe6\x93\x14\x6c\xea"
      "\x48\x4a\x41\x5b\x76\x96\x61\x18\xb6\x4f\x75\x1a\x0f\x24\x1b\x07\x2e\x90"
      "\x08\x00\x08\x00\x2d\x75\x59\x3a\x28\x6c\xec\xc9\x3e\x64\xc2\x27\xc9\x5a"
      "\xa0\xb7\x84\x62\x57\x04\xf0\x7a\x72\xc2\x34\x66\x4c\x0a\xf9\x36\x0a\x1f"
      "\x7a\x5e\x6b\x60\x71\x30\xc8\x9f\x18\xc0\xc1\x08\x9d\x8b\x85\x32\x89\xe0"
      "\x1a\xa2\x7a\xe8\xb0\x9e\x00\xe7\x9a\xb2\x0b\x0b\x8b\x11\x48\xf4\x9f\xaf"
      "\x2a\xd0\x00\x00\x00\x00\x00\x00\x00\x6f\xa0\x3c\x64\x68\x97\x20\x89\xb3"
      "\x02\xd7\xbf\x60\x23\xcd\xce\xdb\x5e\x01\x25\xeb\xbc\x08\xde\xe5\x10\xcb"
      "\x23\x64\x14\x92\x15\x10\x83\x33\x71\x9a\xcd\x97\xcf\xa1\x07\xd4\x02\x24"
      "\xed\xc5\x46\x5a\x93\x2b\x77\xe7\x4e\x80\x2a\x0d\x42\xbc\x60\x99\xad\x23"
      "\x00\x00\x00\x80\x00\x6e\xf6\xc1\xff\x09\x00\x00\x00\x00\x00\x00\x10\xc6"
      "\x3a\x94\x9e\x8b\x79\x55\x39\x4f\xfa\xf4\xab\x87\xb1\xbf\xed\xa7\xbe\x58"
      "\x66\x02\xd9\x85\x43\x0c\xea\x01\x62\xab\x3f\xcf\x45\x91\xc9\x26\xab\xfb"
      "\x07\x67\x19\x23\x02\x00\x00\x00\xb0\xee\xa2\x44\x92\xa6\x60\x58\x3e\xec"
      "\xb4\x2c\xbc\xd3\xde\x3a\x83\x20\x9d\xa1\x7a\x0f\xaf\x60\xfd\x6a\xd9\xb9"
      "\x7a\xa5\xfa\x68\x48\x03\x66\xc9\xc6\xfd\x6f\xa5\x04\x3a\xa3\x92\x6b\x81"
      "\xe3\xb5\x9c\x95\xc2\x5a\x57\x3d\xc2\xed\xca\xea\x2b\x1a\x52\x49\x6d\xfc"
      "\xaf\x99\x43\x14\x10\xfd\x13\x4a\x99\x63\x82\xa1\xa0\x4d\x5b\xb9\x24\xcf"
      "\xe5\xf3\x18\x54\x18\xd6\x05\xff\xff\x9c\x4d\x2e\xc7\xc3\x2f\x20\x95\xe6"
      "\x3c\x80\xaf\xf9\xfa\x74\x0b\x5b\x76\x32\xf3\x20\x30\x91\x6f\x89\xc6\xda"
      "\xa7\x90\xd6\x2d\x6f\xae\xc2\xfe\xd4\x4d\xa4\x92\x8b\x30\x14\x2b\xa1\x1d"
      "\xe6\xc5\xd5\x0b\x83\xba\xe6\x13\x40\x22\x16\xb5\x05\x4d\x1e\x7c\x13\xb1"
      "\x35\x5d\x6f\x4a\x82\x45\xff\xa4\x99\x7d\xa9\xc7\x7a\xf4\xc0\xeb\x97\xfc"
      "\xa5\x85\xec\x6b\xf5\x83\x51\xd5\x64\xbe\xb6\xd9\x52\xaa\xb9\xc7\x07\x08"
      "\x00\x00\x00\x00\x00\x00\x00\x43\x3b\x80\x9b\xdb\x9f\xbd\x48\xbc\x87\x34"
      "\x95\xcb\xff\x90\x32\x6e\xea\x31\xae\x4e\x0f\x75\x05\xeb\xf6\xc9\xd1\x33"
      "\x30\xca\x00\x5a\xce\x1a\x84\x52\x1f\x14\x51\x8c\x9b\x47\x6f\xcc\xbd\x6c"
      "\x71\x20\x16\x21\x98\x48\x62\x4b\x87\xce\xc2\xdb\xe9\x82\x23\xa0\xeb\x4f"
      "\xa3\x9f\x6b\x5c\x02\xe6\xd6\xd9\x07\x56\xff\x57\x90\x2a\x8f\x57\x00\x00"
      "\x00\x00\x97\x00\xcf\x0b\x4b\x8b\xc2\x29\x41\x33\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x03\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x10"
      "\x00\x8b\xc0\xd9\x55\x97\x11\xe6\xe8\x86\x1c\x46\x49\x5b\xa5\x85\xa4\xb2"
      "\xd0\x2e\xdc\x3e\x28\xdd\x27\x1c\x89\x62\x49\xed\x85\xb9\x80\x68\x0b\x00"
      "\x00\x2b\x43\x5a\xc1\x5f\xc0\x28\x8d\x9b\x2a\x16\x9c\xdc\xac\xc4\x13\x03"
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      "\x34\x5a\xf2\x82\x3c\x48\x7d\x2f\xd9\x9d\xb6\xea\x6e\x00\x8e\x7f\xfa\x06"
      "\xca\x86\x15\x51\x18\x9d\x15\x5b\xd0\x77\xa7\x9f\xe2\xc7\xe9\x61\x35\x2e"
      "\x56\x82\x4f\x72\x7d\x21\xd4\x1e\xae\x78\xbf\xec\x4a\x2d\x7a\x7e\xdb\xc8"
      "\xef\x95\x8c\x5e\xa5\x99\xf7\xc2\x5b\xf7\x1c\x23\x40\x55\x8a\xa1\x2f\xdd"
      "\x24\xa8\x8a\xaa\xd5\x92\x1a\xee\x7d\xae\x6a\x2f\x30\x09\xd9\xcb\x43\xab"
      "\x48\x98\xd0\xf0\xaa\x56\x54\x31\xb6\xab\xe5\x85\xd7\x5d\xb0\x4d\x1c\x9b"
      "\xa0\xb9\xde\x4a\xe8\xb0\xd3\x13\x2b\xc6\x81\x0c\xc9\xa6\x93\x97\x9f\x55"
      "\x17\x4a\x72\xe1\xdf\x9f\xde\xf3\x5b\xc4\x70\xf9\xe6\xe5\x91\x98\x27\x57"
      "\xf4\x5c\x52\xc6\x45\xd8\x91\xbf\x63\xbb\x21\xfb\x66\x92\x6e\xbe\x1a\x85"
      "\x25\x61\x1f\xc3\xe8\xbb\x87\x95\xc3\x6d\xc2\xa8\x6b\x5a\xb4\x6f\xf3\x3c"
      "\xc7\x4f\x61\x75\x1b\x2d\xae\x92\x67\x6d\xb8\x5c\x8d\x0c\x72\x1b\x7e\xa4"
      "\x54\x4b\xf5\x1c\x95\xc8\x6f\xca\xc1\xf4\x34\xd0\x9d\x1e\xe4\x92\x8a\xaf"
      "\xe2\x3d\xe6\x6f\xed\x97\x2e\x0d\xdd\xfb\x33\xf6\x4e\x64\x70\x1b\x04\x92"
      "\x39\xe7\xf5\x52\xd8\x16\x44\x1d\x11\xc4\xc2\x64\x7c\x01\x44\x62\x34\x43"
      "\x59\x19\x8d\x97\xc4\xb6\xe9\xed\x31\xca\x18\x98\x7b\x64\xde\x07\x9b\x2b"
      "\xed\x64\x1e\x8a\x92\xf1\x3c\xa7\x08\x44\xc6\x5c\xb4\x23\xd0\x19\x50\xb0"
      "\xeb\xf4\x4b\xd2\x8e\x09\xc0\x5d\x9a\xe5\xdd\x68\x9f\xb8\x80\xfb\x18\xd0"
      "\x42\x21\x9f\x5a\xc6\x0c\x3a\x03\xb0\x85\xab\xf3\xe8\xe3\xef\xc8\x42\xa8"
      "\xd3\x28\x73\x34\x61\xf0\x4c\x99\x60\x70\x61\xc6\x5e\xd1\x4c\x61\x32\x2a"
      "\x5a\xc2\xd3\x71\xa9\x5b\x8a\xdc\x67\xec\x92\xd1\x3a\x4f\xaa\x05\x20\x71"
      "\x66\xb1\x9a\x87\x58\xd8\x85\x54\x00\xd8\xc6\xa7\x24\x2d\xc2\x07\x25\x1e"
      "\x87\x97\xec\xa2\x4e\xa4\xf4\x87\x66\x3e\x60\xf2\xf5\xe1\xf1\x42\x49\x58"
      "\xfd\x14\x8f\x84\x68\x30\xe8\x8a\x42\xd9\x3e\x1f\xe9\xc0\xb4\xa4\xa2\x68"
      "\x92\x17\x38\x04\x00\xa9\xf3\xcb\x38\x11\xac\x87\xc5\x4c\x8e\xbc\x8b\xcf"
      "\xb4\x61\x3c\xc3\xa9\x97\xff\x15\x79\xed\xbd\x4a\xde\x80\x20\xe3\xad\x00"
      "\x1b\x07\x2b\x1a\x75\x1b\x58\x8a\xc4\x63\x9f\x35\xa5\x8e\x00\xa5\x0c\x02"
      "\x70\x60\x69\x7a\x7f\x10\x13\x2b\x1c\x25\x9d\x3f\x28\xb9\xea\x81\x23\x2f"
      "\xbe\xf6\x65\xf6\x21\x2f\x87\x5b\x2a\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x20\xbd\x79\xe4\x1c\x68\x21\x39\xc5\x8a\xc1\xde\xb0"
      "\x39\xa6\x91\xad\x64\x0e\x12\xc1\x2f\xe1\x1d\x70\xfe\x49\x59\x06\xf2\xd5"
      "\xd7\x17\x78\xac\xbd\x4e\xee\x53\xa3\x99\x6c\xb0\xde\x84\xbd\x2b\x05\x9d"
      "\x60\xc0\xf9\x6a\x53\xea\x44\xe0\xb2\x93\x86\x5a\xa6\x8d\xf4\x94\xf8\x7d"
      "\xb9\x76\xe3\x6a\xd6\xc0\x69\x12\x24\x4d\x4c\x88\x3c\x4a\xaa\x60\xb4\xa1"
      "\x39\x2c\xe0\xb2\xf2\xc5\x19\x66\x3b\x46\x52\xff\x87\x1e\x0f\x6d\xff\xf9"
      "\xf7\xd3\x4e\xcf\x04\xbe\x0a\x58\xc3\xd5\x31\x74\xb6\x7d\x18\x86\xe3\x4b"
      "\x81\xad\x8c\x60\xda\x56\xac\xc6\x47\x39\xc3\xac\xab\x24\xaa\x8d\x0a\xc9"
      "\x2d\x46\x50\x74\xf9\x15\x60\x8b\x1b\x60\xa9\x48\xba\xd4\x01\xb1\xa7\xfb"
      "\x36\x27\xbb\xe6\xc4\x51\x23\xed\x44\xbf\xdf\x8c\xc1\x43\xbd\x1b\x7a\x66"
      "\x3d\xc3\xd0\x47\x6b\x8e\x39\xbe\xcf\xfc\x42\x9e\x41\xf6\x6b\x1e\x37\xae"
      "\x52\xaa\xca\xff\x0f\x1d\xc8\xea\x70\xb6\x8c\x25\x07\x2e\x20\x58\x6b\x19"
      "\x12\x7d\x75\xfa\x71\x57\x7f\x26\x5c\x51\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x91\x5c\x2c\xde\x78"
      "\xdb\x00\x2a\x20\xe3\x70\x60\x0f\x56\xb3\x80\x37\x86\xff\xff\x26\x8f\xa1"
      "\x78\x2c\x24\x0a\x1d\x3b\x62\xbb\x5c\x9c\x57\x12\xbc\x58\xa0\xf2\x76\xf5"
      "\x22\x4b\x6e\xfa\xce\xab\x36\xd1\x46\x8b\x08\x00\x00\x00\x00\x00\x00\x00"
      "\xcb\xef\xec\x08\xac\x7c\xb6\x2a\x9f\x6a\xbc\xc9\x7d\xaf\x83\xed\xaf\xe4"
      "\x40\x9e\xcb\xa3\x05\x0a\x32\x1a\x18\x0a\xf1\x2b\xc5\x9b\x1b\x2f\x1a\x9c"
      "\xfd\xf4\xbf\x2d\x26\x00\x00\x00\x00\x00\xa6\x2f\x09\xe2\xed\xe9\x38\xea"
      "\x30\x0c\xbe\xfa\xda\x05\xc3\x56\xf1\x2c\xdc\x84\xf6\x6c\x65\xe6\x69\xf0"
      "\xff\xcb\x4a\xd9\x4f\x6a\x8b\xa9\x78\xf8\x9a\xb3\xd2\xe6\x2b\xd2\xc3\xea"
      "\xe9\x21\xe9\x87\x1a\xcb\xf3\x6c\x25\x9d\x3a\x86\xdd\x5d\x02\x2b\xac\x5e"
      "\xe3\x8f\x6e\xcc\xd3\xe4\x62\xe4\x7a\x96\xdc\x9e\x65\x3f\xb7\xd7\xa6\x44"
      "\x05\xa7\xc9\x7f\xb3\x94\x6f\x67\x66\xf9\x37\x11\x96\x52\xe0\x74\x64\x91"
      "\x02\x90\x87\x3e\x98\x9f\x37\x98\xf5\x32\x4d\xe8\x58\x4a\x1a\x87\x72\xd2"
      "\xbd\xdf\xc6\xee\xa6\x33\xf7\xbe\x50\xd3\x62\x15\x99\x14\xa8\x77\xd2\xfe"
      "\x0f\xc6\x77\x83\xb4\xfb\x00\x00\x00\x00\x00\x00\x00\x00\x00\x32\x8b\x4e"
      "\xd8\xac\x2f\x2d\x04\x40\x48\x8e\x4b\x1d\x32\x28\x03\x73\xdf\x7c\xe8\x84"
      "\x76\x83\xfa\xe1\xc7\x3e\xe4\xcb\x32\x0b\xa8\xa8\x20",
      4099));
  NONFAILING(*(uint64_t*)0x20000990 = 0x20000100);
  NONFAILING(memcpy((void*)0x20000100, "GPL\000", 4));
  NONFAILING(*(uint32_t*)0x20000998 = 0);
  NONFAILING(*(uint32_t*)0x2000099c = 0);
  NONFAILING(*(uint64_t*)0x200009a0 = 0);
  NONFAILING(*(uint32_t*)0x200009a8 = 0);
  NONFAILING(*(uint32_t*)0x200009ac = 0);
  NONFAILING(memset((void*)0x200009b0, 0, 16));
  NONFAILING(*(uint32_t*)0x200009c0 = 0);
  NONFAILING(*(uint32_t*)0x200009c4 = 0);
  NONFAILING(*(uint32_t*)0x200009c8 = -1);
  NONFAILING(*(uint32_t*)0x200009cc = 8);
  NONFAILING(*(uint64_t*)0x200009d0 = 0x20000000);
  NONFAILING(*(uint32_t*)0x20000000 = 0);
  NONFAILING(*(uint32_t*)0x20000004 = 0);
  NONFAILING(*(uint32_t*)0x200009d8 = 8);
  NONFAILING(*(uint32_t*)0x200009dc = 0x10);
  NONFAILING(*(uint64_t*)0x200009e0 = 0x20000000);
  NONFAILING(*(uint32_t*)0x20000000 = 0);
  NONFAILING(*(uint32_t*)0x20000004 = 0);
  NONFAILING(*(uint32_t*)0x20000008 = 0);
  NONFAILING(*(uint32_t*)0x2000000c = 0);
  NONFAILING(*(uint32_t*)0x200009e8 = 0x10);
  NONFAILING(*(uint32_t*)0x200009ec = 0);
  NONFAILING(*(uint32_t*)0x200009f0 = -1);
  NONFAILING(*(uint32_t*)0x200009f4 = 0);
  NONFAILING(*(uint64_t*)0x200009f8 = 0);
  NONFAILING(*(uint64_t*)0x20000a00 = 0);
  NONFAILING(*(uint32_t*)0x20000a08 = 0x10);
  NONFAILING(*(uint32_t*)0x20000a0c = 0);
  res = syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x20000980ul, /*size=*/0x49ul);
  if (res != -1)
    r[2] = res;
  NONFAILING(*(uint64_t*)0x20000040 = 0x20000300);
  NONFAILING(memcpy((void*)0x20000300, "sys_enter\000", 10));
  NONFAILING(*(uint32_t*)0x20000048 = r[2]);
  syscall(__NR_bpf, /*cmd=*/0x11ul, /*arg=*/0x20000040ul, /*size=*/0x10ul);
  syscall(__NR_pause);
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1,
          /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0x1000000ul,
          /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1,
          /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x21000000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1,
          /*offset=*/0ul);
  setup_sysctl();
  setup_cgroups();
  setup_usb();
  setup_swap();
  install_segv_handler();
  for (procid = 0; procid < 5; procid++) {
    if (fork() == 0) {
      use_temporary_dir();
      do_sandbox_none();
    }
  }
  sleep(1000000);
  return 0;
}