// https://syzkaller.appspot.com/bug?id=d5f63be97bcf572595613d19f9b82475e37c9026
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <dirent.h>
#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <pthread.h>
#include <sched.h>
#include <signal.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/mount.h>
#include <sys/prctl.h>
#include <sys/resource.h>
#include <sys/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>

#ifndef __NR_bpf
#define __NR_bpf 321
#endif

static unsigned long long procid;

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

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

static 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);
  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);
}

#define BITMASK(bf_off, bf_len) (((1ull << (bf_len)) - 1) << (bf_off))
#define STORE_BY_BITMASK(type, htobe, addr, val, bf_off, bf_len)               \
  *(type*)(addr) =                                                             \
      htobe((htobe(*(type*)(addr)) & ~BITMASK((bf_off), (bf_len))) |           \
            (((type)(val) << (bf_off)) & BITMASK((bf_off), (bf_len))))

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

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

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

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

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

static void loop();

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

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

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

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

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

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

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

static void setup_test()
{
  prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
  setpgrp();
  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);
}

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)
{
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  int i, call, thread;
  for (call = 0; call < 4; 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);
      event_timedwait(&th->done, 50);
      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)
{
  int iter = 0;
  for (;; iter++) {
    char cwdbuf[32];
    sprintf(cwdbuf, "./%d", iter);
    if (mkdir(cwdbuf, 0777))
      exit(1);
    int pid = fork();
    if (pid < 0)
      exit(1);
    if (pid == 0) {
      if (chdir(cwdbuf))
        exit(1);
      setup_test();
      execute_one();
      exit(0);
    }
    int status = 0;
    uint64_t start = current_time_ms();
    for (;;) {
      sleep_ms(10);
      if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid)
        break;
      if (current_time_ms() - start < 5000)
        continue;
      kill_and_wait(pid, &status);
      break;
    }
    remove_dir(cwdbuf);
  }
}

uint64_t r[2] = {0xffffffffffffffff, 0xffffffffffffffff};

void execute_call(int call)
{
  intptr_t res = 0;
  switch (call) {
  case 0:
    //  bpf$MAP_CREATE_TAIL_CALL arguments: [
    //    cmd: const = 0x0 (8 bytes)
    //    arg: ptr[in, bpf_map_create_arg_t[const[BPF_MAP_TYPE_PROG_ARRAY,
    //    int32], const[4, int32], const[4, int32], const[10, int32], const[0,
    //    int32], const[0, int64]]] {
    //      bpf_map_create_arg_t[const[BPF_MAP_TYPE_PROG_ARRAY, int32], const[4,
    //      int32], const[4, int32], const[10, int32], const[0, int32], const[0,
    //      int64]] {
    //        type: const = 0x3 (4 bytes)
    //        ksize: const = 0x4 (4 bytes)
    //        vsize: const = 0x4 (4 bytes)
    //        max: const = 0xa (4 bytes)
    //        flags: const = 0x0 (4 bytes)
    //        inner: fd_bpf_map (resource)
    //        node: int32 = 0x0 (4 bytes)
    //        map_name: buffer: {00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    //        00} (length 0x10) map_ifindex: ifindex (resource) btf_fd: fd_btf
    //        (resource) btf_key_type_id: int32 = 0x0 (4 bytes)
    //        btf_value_type_id: int32 = 0x0 (4 bytes)
    //        btf_vmlinux_type_id: int32 = 0x0 (4 bytes)
    //        map_extra: const = 0x0 (8 bytes)
    //        value_type_btf_obj_fd: union
    //        _bpf_map_create_arg_t[const[BPF_MAP_TYPE_PROG_ARRAY, int32],
    //        const[4, int32], const[4, int32], const[10, int32], const[0,
    //        int32], const[0, int64]]_value_type_btf_obj_fd_wrapper {
    //          void: buffer: {} (length 0x0)
    //        }
    //        pad1: union _bpf_map_create_arg_t[const[BPF_MAP_TYPE_PROG_ARRAY,
    //        int32], const[4, int32], const[4, int32], const[10, int32],
    //        const[0, int32], const[0, int64]]_pad1_wrapper {
    //          value: const = 0x0 (4 bytes)
    //        }
    //        map_token_fd: union
    //        _bpf_map_create_arg_t[const[BPF_MAP_TYPE_PROG_ARRAY, int32],
    //        const[4, int32], const[4, int32], const[10, int32], const[0,
    //        int32], const[0, int64]]_map_token_fd_wrapper {
    //          void: buffer: {} (length 0x0)
    //        }
    //        pad2: union _bpf_map_create_arg_t[const[BPF_MAP_TYPE_PROG_ARRAY,
    //        int32], const[4, int32], const[4, int32], const[10, int32],
    //        const[0, int32], const[0, int64]]_pad2_wrapper {
    //          value: const = 0x0 (4 bytes)
    //        }
    //      }
    //    }
    //    size: len = 0x48 (8 bytes)
    //  ]
    //  returns tail_call_map_fd
    *(uint32_t*)0x200000000540 = 3;
    *(uint32_t*)0x200000000544 = 4;
    *(uint32_t*)0x200000000548 = 4;
    *(uint32_t*)0x20000000054c = 0xa;
    *(uint32_t*)0x200000000550 = 0;
    *(uint32_t*)0x200000000554 = 0;
    *(uint32_t*)0x200000000558 = 0;
    memset((void*)0x20000000055c, 0, 16);
    *(uint32_t*)0x20000000056c = 0;
    *(uint32_t*)0x200000000570 = 0;
    *(uint32_t*)0x200000000574 = 0;
    *(uint32_t*)0x200000000578 = 0;
    *(uint32_t*)0x20000000057c = 0;
    *(uint64_t*)0x200000000580 = 0;
    *(uint32_t*)0x200000000588 = 0;
    *(uint32_t*)0x20000000058c = 0;
    res = syscall(__NR_bpf, /*cmd=*/0ul, /*arg=*/0x200000000540ul,
                  /*size=*/0x48ul);
    if (res != -1)
      r[0] = res;
    break;
  case 1:
    //  bpf$PROG_LOAD arguments: [
    //    cmd: const = 0x5 (8 bytes)
    //    arg: ptr[in, bpf_prog_t[flags[bpf_prog_type, int32],
    //    bpf_prog_attach_types, bpf_btf_id[opt], fd_bpf_prog[opt]]] {
    //      bpf_prog_t[flags[bpf_prog_type, int32], bpf_prog_attach_types,
    //      bpf_btf_id[opt], fd_bpf_prog[opt]] {
    //        type: bpf_prog_type = 0x3 (4 bytes)
    //        ninsn: bytesize8 = 0x8 (4 bytes)
    //        insns: ptr[in, bpf_instructions] {
    //          union bpf_instructions {
    //            framed: bpf_framed_program {
    //              initr0: bpf_insn_init_r0 {
    //                code: const = 0x18 (1 bytes)
    //                dst: const = 0x0 (0 bytes)
    //                src: const = 0x0 (1 bytes)
    //                off: const = 0x0 (2 bytes)
    //                imm: int32 = 0x0 (4 bytes)
    //                code2: const = 0x0 (1 bytes)
    //                regs2: const = 0x0 (1 bytes)
    //                off2: const = 0x0 (2 bytes)
    //                imm2: int32 = 0x0 (4 bytes)
    //              }
    //              body: array[bpf_insn] {
    //                union bpf_insn {
    //                  tail_call: bpf_insn_tail_call {
    //                    insn1: bpf_insn_map_fd_t[const[BPF_REG_2, int8:4],
    //                    tail_call_map] {
    //                      code: const = 0x18 (1 bytes)
    //                      dst: const = 0x2 (0 bytes)
    //                      src: const = 0x1 (1 bytes)
    //                      off: const = 0x0 (2 bytes)
    //                      imm: tail_call_map (resource)
    //                      code2: const = 0x0 (1 bytes)
    //                      regs2: const = 0x0 (1 bytes)
    //                      off2: const = 0x0 (2 bytes)
    //                      imm2: const = 0x0 (4 bytes)
    //                    }
    //                    insn2: bpf_insn_alu_t[BPF_ALU64, BPF_K0, BPF_MOV0,
    //                    const[BPF_REG_3, int8:4], const[0, int8:4], const[0,
    //                    int16], const[0, int32]] {
    //                      code_class: int8 = 0x7 (0 bytes)
    //                      code_s: int8 = 0x0 (0 bytes)
    //                      code_op: int8 = 0xb (1 bytes)
    //                      dst: const = 0x3 (0 bytes)
    //                      src: const = 0x0 (1 bytes)
    //                      off: const = 0x0 (2 bytes)
    //                      imm: const = 0x0 (4 bytes)
    //                    }
    //                    insn3:
    //                    bpf_insn_call_helper_t[const[BPF_FUNC_tail_call,
    //                    int32]] {
    //                      code: const = 0x85 (1 bytes)
    //                      regs: const = 0x0 (1 bytes)
    //                      off: const = 0x0 (2 bytes)
    //                      func: const = 0xc (4 bytes)
    //                    }
    //                    insn4: bpf_insn_alu_t[BPF_ALU64, BPF_K0, BPF_MOV0,
    //                    const[BPF_REG_0, int8:4], const[0, int8:4], const[0,
    //                    int16], const[0, int32]] {
    //                      code_class: int8 = 0x7 (0 bytes)
    //                      code_s: int8 = 0x0 (0 bytes)
    //                      code_op: int8 = 0xb (1 bytes)
    //                      dst: const = 0x0 (0 bytes)
    //                      src: const = 0x0 (1 bytes)
    //                      off: const = 0x0 (2 bytes)
    //                      imm: const = 0x0 (4 bytes)
    //                    }
    //                  }
    //                }
    //              }
    //              exit: bpf_insn_exit {
    //                code: const = 0x95 (1 bytes)
    //                regs: const = 0x0 (1 bytes)
    //                off: const = 0x0 (2 bytes)
    //                imm: const = 0x0 (4 bytes)
    //              }
    //            }
    //          }
    //        }
    //        license: ptr[in, buffer] {
    //          buffer: {47 50 4c 00} (length 0x4)
    //        }
    //        loglev: int32 = 0x0 (4 bytes)
    //        logsize: len = 0x0 (4 bytes)
    //        log: nil
    //        kern_version: bpf_kern_version = 0x0 (4 bytes)
    //        flags: bpf_prog_load_flags = 0x0 (4 bytes)
    //        prog_name: buffer: {00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    //        00} (length 0x10) prog_ifindex: ifindex (resource)
    //        expected_attach_type: union bpf_prog_attach_types {
    //          sched_cls: sched_cls_attach_types = 0x0 (4 bytes)
    //        }
    //        btf_fd: fd_btf (resource)
    //        func_info_rec_size: const = 0x0 (4 bytes)
    //        func_info: nil
    //        func_info_cnt: len = 0x0 (4 bytes)
    //        line_info_rec_size: const = 0x0 (4 bytes)
    //        line_info: nil
    //        line_info_cnt: len = 0x0 (4 bytes)
    //        attach_btf_id: bpf_btf_id (resource)
    //        attach_prog_fd: fd_bpf_prog (resource)
    //        core_relo_cnt: len = 0x0 (4 bytes)
    //        fd_array: nil
    //        core_relos: nil
    //        core_relo_rec_size: const = 0x0 (4 bytes)
    //        log_true_size: int32 = 0x0 (4 bytes)
    //        prog_token_fd: union _bpf_prog_t[flags[bpf_prog_type, int32],
    //        bpf_prog_attach_types, bpf_btf_id[opt],
    //        fd_bpf_prog[opt]]_prog_token_fd_wrapper {
    //          void: buffer: {} (length 0x0)
    //        }
    //        pad: union _bpf_prog_t[flags[bpf_prog_type, int32],
    //        bpf_prog_attach_types, bpf_btf_id[opt],
    //        fd_bpf_prog[opt]]_pad_wrapper {
    //          value: const = 0x0 (4 bytes)
    //        }
    //      }
    //    }
    //    size: len = 0xa0 (8 bytes)
    //  ]
    //  returns fd_bpf_prog
    *(uint32_t*)0x200000000680 = 3;
    *(uint32_t*)0x200000000684 = 8;
    *(uint64_t*)0x200000000688 = 0x200000000740;
    *(uint8_t*)0x200000000740 = 0x18;
    STORE_BY_BITMASK(uint8_t, , 0x200000000741, 0, 0, 4);
    STORE_BY_BITMASK(uint8_t, , 0x200000000741, 0, 4, 4);
    *(uint16_t*)0x200000000742 = 0;
    *(uint32_t*)0x200000000744 = 0;
    *(uint8_t*)0x200000000748 = 0;
    *(uint8_t*)0x200000000749 = 0;
    *(uint16_t*)0x20000000074a = 0;
    *(uint32_t*)0x20000000074c = 0;
    *(uint8_t*)0x200000000750 = 0x18;
    STORE_BY_BITMASK(uint8_t, , 0x200000000751, 2, 0, 4);
    STORE_BY_BITMASK(uint8_t, , 0x200000000751, 1, 4, 4);
    *(uint16_t*)0x200000000752 = 0;
    *(uint32_t*)0x200000000754 = r[0];
    *(uint8_t*)0x200000000758 = 0;
    *(uint8_t*)0x200000000759 = 0;
    *(uint16_t*)0x20000000075a = 0;
    *(uint32_t*)0x20000000075c = 0;
    STORE_BY_BITMASK(uint8_t, , 0x200000000760, 7, 0, 3);
    STORE_BY_BITMASK(uint8_t, , 0x200000000760, 0, 3, 1);
    STORE_BY_BITMASK(uint8_t, , 0x200000000760, 0xb, 4, 4);
    STORE_BY_BITMASK(uint8_t, , 0x200000000761, 3, 0, 4);
    STORE_BY_BITMASK(uint8_t, , 0x200000000761, 0, 4, 4);
    *(uint16_t*)0x200000000762 = 0;
    *(uint32_t*)0x200000000764 = 0;
    *(uint8_t*)0x200000000768 = 0x85;
    *(uint8_t*)0x200000000769 = 0;
    *(uint16_t*)0x20000000076a = 0;
    *(uint32_t*)0x20000000076c = 0xc;
    STORE_BY_BITMASK(uint8_t, , 0x200000000770, 7, 0, 3);
    STORE_BY_BITMASK(uint8_t, , 0x200000000770, 0, 3, 1);
    STORE_BY_BITMASK(uint8_t, , 0x200000000770, 0xb, 4, 4);
    STORE_BY_BITMASK(uint8_t, , 0x200000000771, 0, 0, 4);
    STORE_BY_BITMASK(uint8_t, , 0x200000000771, 0, 4, 4);
    *(uint16_t*)0x200000000772 = 0;
    *(uint32_t*)0x200000000774 = 0;
    *(uint8_t*)0x200000000778 = 0x95;
    *(uint8_t*)0x200000000779 = 0;
    *(uint16_t*)0x20000000077a = 0;
    *(uint32_t*)0x20000000077c = 0;
    *(uint64_t*)0x200000000690 = 0x200000000780;
    memcpy((void*)0x200000000780, "GPL\000", 4);
    *(uint32_t*)0x200000000698 = 0;
    *(uint32_t*)0x20000000069c = 0;
    *(uint64_t*)0x2000000006a0 = 0;
    *(uint32_t*)0x2000000006a8 = 0;
    *(uint32_t*)0x2000000006ac = 0;
    memset((void*)0x2000000006b0, 0, 16);
    *(uint32_t*)0x2000000006c0 = 0;
    *(uint32_t*)0x2000000006c4 = 0;
    *(uint32_t*)0x2000000006c8 = 0;
    *(uint32_t*)0x2000000006cc = 0;
    *(uint64_t*)0x2000000006d0 = 0;
    *(uint32_t*)0x2000000006d8 = 0;
    *(uint32_t*)0x2000000006dc = 0;
    *(uint64_t*)0x2000000006e0 = 0;
    *(uint32_t*)0x2000000006e8 = 0;
    *(uint32_t*)0x2000000006ec = 0;
    *(uint32_t*)0x2000000006f0 = 0;
    *(uint32_t*)0x2000000006f4 = 0;
    *(uint64_t*)0x2000000006f8 = 0;
    *(uint64_t*)0x200000000700 = 0;
    *(uint32_t*)0x200000000708 = 0;
    *(uint32_t*)0x20000000070c = 0;
    *(uint32_t*)0x200000000710 = 0;
    res = syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x200000000680ul,
                  /*size=*/0xa0ul);
    if (res != -1)
      r[1] = res;
    break;
  case 2:
    //  bpf$PROG_LOAD arguments: [
    //    cmd: const = 0x5 (8 bytes)
    //    arg: ptr[in, bpf_prog_t[flags[bpf_prog_type, int32],
    //    bpf_prog_attach_types, bpf_btf_id[opt], fd_bpf_prog[opt]]] {
    //      bpf_prog_t[flags[bpf_prog_type, int32], bpf_prog_attach_types,
    //      bpf_btf_id[opt], fd_bpf_prog[opt]] {
    //        type: bpf_prog_type = 0x3 (4 bytes)
    //        ninsn: bytesize8 = 0x8 (4 bytes)
    //        insns: ptr[in, bpf_instructions] {
    //          union bpf_instructions {
    //            framed: bpf_framed_program {
    //              initr0: bpf_insn_init_r0 {
    //                code: const = 0x18 (1 bytes)
    //                dst: const = 0x0 (0 bytes)
    //                src: const = 0x0 (1 bytes)
    //                off: const = 0x0 (2 bytes)
    //                imm: int32 = 0x0 (4 bytes)
    //                code2: const = 0x0 (1 bytes)
    //                regs2: const = 0x0 (1 bytes)
    //                off2: const = 0x0 (2 bytes)
    //                imm2: int32 = 0xfffffffe (4 bytes)
    //              }
    //              body: array[bpf_insn] {
    //                union bpf_insn {
    //                  tail_call: bpf_insn_tail_call {
    //                    insn1: bpf_insn_map_fd_t[const[BPF_REG_2, int8:4],
    //                    tail_call_map] {
    //                      code: const = 0x18 (1 bytes)
    //                      dst: const = 0x2 (0 bytes)
    //                      src: const = 0x1 (1 bytes)
    //                      off: const = 0x0 (2 bytes)
    //                      imm: tail_call_map (resource)
    //                      code2: const = 0x0 (1 bytes)
    //                      regs2: const = 0x0 (1 bytes)
    //                      off2: const = 0x0 (2 bytes)
    //                      imm2: const = 0x0 (4 bytes)
    //                    }
    //                    insn2: bpf_insn_alu_t[BPF_ALU64, BPF_K0, BPF_MOV0,
    //                    const[BPF_REG_3, int8:4], const[0, int8:4], const[0,
    //                    int16], const[0, int32]] {
    //                      code_class: int8 = 0x7 (0 bytes)
    //                      code_s: int8 = 0x0 (0 bytes)
    //                      code_op: int8 = 0xb (1 bytes)
    //                      dst: const = 0x3 (0 bytes)
    //                      src: const = 0x0 (1 bytes)
    //                      off: const = 0x0 (2 bytes)
    //                      imm: const = 0x0 (4 bytes)
    //                    }
    //                    insn3:
    //                    bpf_insn_call_helper_t[const[BPF_FUNC_tail_call,
    //                    int32]] {
    //                      code: const = 0x85 (1 bytes)
    //                      regs: const = 0x0 (1 bytes)
    //                      off: const = 0x0 (2 bytes)
    //                      func: const = 0xc (4 bytes)
    //                    }
    //                    insn4: bpf_insn_alu_t[BPF_ALU64, BPF_K0, BPF_MOV0,
    //                    const[BPF_REG_0, int8:4], const[0, int8:4], const[0,
    //                    int16], const[0, int32]] {
    //                      code_class: int8 = 0x7 (0 bytes)
    //                      code_s: int8 = 0x0 (0 bytes)
    //                      code_op: int8 = 0xb (1 bytes)
    //                      dst: const = 0x0 (0 bytes)
    //                      src: const = 0x0 (1 bytes)
    //                      off: const = 0x0 (2 bytes)
    //                      imm: const = 0x0 (4 bytes)
    //                    }
    //                  }
    //                }
    //              }
    //              exit: bpf_insn_exit {
    //                code: const = 0x95 (1 bytes)
    //                regs: const = 0x0 (1 bytes)
    //                off: const = 0x0 (2 bytes)
    //                imm: const = 0x0 (4 bytes)
    //              }
    //            }
    //          }
    //        }
    //        license: ptr[in, buffer] {
    //          buffer: {47 50 4c 00} (length 0x4)
    //        }
    //        loglev: int32 = 0x0 (4 bytes)
    //        logsize: len = 0x0 (4 bytes)
    //        log: nil
    //        kern_version: bpf_kern_version = 0x0 (4 bytes)
    //        flags: bpf_prog_load_flags = 0x0 (4 bytes)
    //        prog_name: buffer: {00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    //        00} (length 0x10) prog_ifindex: ifindex (resource)
    //        expected_attach_type: union bpf_prog_attach_types {
    //          sched_cls: sched_cls_attach_types = 0x0 (4 bytes)
    //        }
    //        btf_fd: fd_btf (resource)
    //        func_info_rec_size: const = 0x0 (4 bytes)
    //        func_info: nil
    //        func_info_cnt: len = 0x0 (4 bytes)
    //        line_info_rec_size: const = 0x0 (4 bytes)
    //        line_info: nil
    //        line_info_cnt: len = 0x0 (4 bytes)
    //        attach_btf_id: bpf_btf_id (resource)
    //        attach_prog_fd: fd_bpf_prog (resource)
    //        core_relo_cnt: len = 0x0 (4 bytes)
    //        fd_array: nil
    //        core_relos: nil
    //        core_relo_rec_size: const = 0x0 (4 bytes)
    //        log_true_size: int32 = 0x0 (4 bytes)
    //        prog_token_fd: union _bpf_prog_t[flags[bpf_prog_type, int32],
    //        bpf_prog_attach_types, bpf_btf_id[opt],
    //        fd_bpf_prog[opt]]_prog_token_fd_wrapper {
    //          void: buffer: {} (length 0x0)
    //        }
    //        pad: union _bpf_prog_t[flags[bpf_prog_type, int32],
    //        bpf_prog_attach_types, bpf_btf_id[opt],
    //        fd_bpf_prog[opt]]_pad_wrapper {
    //          value: const = 0x0 (4 bytes)
    //        }
    //      }
    //    }
    //    size: len = 0x94 (8 bytes)
    //  ]
    //  returns fd_bpf_prog
    *(uint32_t*)0x200000000c80 = 3;
    *(uint32_t*)0x200000000c84 = 8;
    *(uint64_t*)0x200000000c88 = 0x200000000bc0;
    *(uint8_t*)0x200000000bc0 = 0x18;
    STORE_BY_BITMASK(uint8_t, , 0x200000000bc1, 0, 0, 4);
    STORE_BY_BITMASK(uint8_t, , 0x200000000bc1, 0, 4, 4);
    *(uint16_t*)0x200000000bc2 = 0;
    *(uint32_t*)0x200000000bc4 = 0;
    *(uint8_t*)0x200000000bc8 = 0;
    *(uint8_t*)0x200000000bc9 = 0;
    *(uint16_t*)0x200000000bca = 0;
    *(uint32_t*)0x200000000bcc = 0xfffffffe;
    *(uint8_t*)0x200000000bd0 = 0x18;
    STORE_BY_BITMASK(uint8_t, , 0x200000000bd1, 2, 0, 4);
    STORE_BY_BITMASK(uint8_t, , 0x200000000bd1, 1, 4, 4);
    *(uint16_t*)0x200000000bd2 = 0;
    *(uint32_t*)0x200000000bd4 = r[0];
    *(uint8_t*)0x200000000bd8 = 0;
    *(uint8_t*)0x200000000bd9 = 0;
    *(uint16_t*)0x200000000bda = 0;
    *(uint32_t*)0x200000000bdc = 0;
    STORE_BY_BITMASK(uint8_t, , 0x200000000be0, 7, 0, 3);
    STORE_BY_BITMASK(uint8_t, , 0x200000000be0, 0, 3, 1);
    STORE_BY_BITMASK(uint8_t, , 0x200000000be0, 0xb, 4, 4);
    STORE_BY_BITMASK(uint8_t, , 0x200000000be1, 3, 0, 4);
    STORE_BY_BITMASK(uint8_t, , 0x200000000be1, 0, 4, 4);
    *(uint16_t*)0x200000000be2 = 0;
    *(uint32_t*)0x200000000be4 = 0;
    *(uint8_t*)0x200000000be8 = 0x85;
    *(uint8_t*)0x200000000be9 = 0;
    *(uint16_t*)0x200000000bea = 0;
    *(uint32_t*)0x200000000bec = 0xc;
    STORE_BY_BITMASK(uint8_t, , 0x200000000bf0, 7, 0, 3);
    STORE_BY_BITMASK(uint8_t, , 0x200000000bf0, 0, 3, 1);
    STORE_BY_BITMASK(uint8_t, , 0x200000000bf0, 0xb, 4, 4);
    STORE_BY_BITMASK(uint8_t, , 0x200000000bf1, 0, 0, 4);
    STORE_BY_BITMASK(uint8_t, , 0x200000000bf1, 0, 4, 4);
    *(uint16_t*)0x200000000bf2 = 0;
    *(uint32_t*)0x200000000bf4 = 0;
    *(uint8_t*)0x200000000bf8 = 0x95;
    *(uint8_t*)0x200000000bf9 = 0;
    *(uint16_t*)0x200000000bfa = 0;
    *(uint32_t*)0x200000000bfc = 0;
    *(uint64_t*)0x200000000c90 = 0x200000000c40;
    memcpy((void*)0x200000000c40, "GPL\000", 4);
    *(uint32_t*)0x200000000c98 = 0;
    *(uint32_t*)0x200000000c9c = 0;
    *(uint64_t*)0x200000000ca0 = 0;
    *(uint32_t*)0x200000000ca8 = 0;
    *(uint32_t*)0x200000000cac = 0;
    memset((void*)0x200000000cb0, 0, 16);
    *(uint32_t*)0x200000000cc0 = 0;
    *(uint32_t*)0x200000000cc4 = 0;
    *(uint32_t*)0x200000000cc8 = 0;
    *(uint32_t*)0x200000000ccc = 0;
    *(uint64_t*)0x200000000cd0 = 0;
    *(uint32_t*)0x200000000cd8 = 0;
    *(uint32_t*)0x200000000cdc = 0;
    *(uint64_t*)0x200000000ce0 = 0;
    *(uint32_t*)0x200000000ce8 = 0;
    *(uint32_t*)0x200000000cec = 0;
    *(uint32_t*)0x200000000cf0 = 0;
    *(uint32_t*)0x200000000cf4 = 0;
    *(uint64_t*)0x200000000cf8 = 0;
    *(uint64_t*)0x200000000d00 = 0;
    *(uint32_t*)0x200000000d08 = 0;
    *(uint32_t*)0x200000000d0c = 0;
    *(uint32_t*)0x200000000d10 = 0;
    syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x200000000c80ul, /*size=*/0x94ul);
    for (int i = 0; i < 64; i++) {
      syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x200000000c80ul, /*size=*/0x94ul);
    }
    break;
  case 3:
    //  bpf$MAP_UPDATE_ELEM_TAIL_CALL arguments: [
    //    cmd: const = 0x2 (8 bytes)
    //    arg: ptr[inout, bpf_map_update_tail_call_arg] {
    //      bpf_map_update_tail_call_arg {
    //        map: tail_call_map_update {
    //          in: tail_call_map_fd (resource)
    //          out: tail_call_map (resource)
    //        }
    //        pad = 0x0 (4 bytes)
    //        key: ptr[in, const[0, const]] {
    //          const = 0x0 (4 bytes)
    //        }
    //        val: ptr[in, fd_bpf_prog] {
    //          fd_bpf_prog (resource)
    //        }
    //        flags: const = 0x0 (8 bytes)
    //      }
    //    }
    //    size: len = 0x20 (8 bytes)
    //  ]
    *(uint32_t*)0x2000000000c0 = r[0];
    *(uint64_t*)0x2000000000c8 = 0x200000000000;
    *(uint32_t*)0x200000000000 = 0;
    *(uint64_t*)0x2000000000d0 = 0x200000000080;
    *(uint32_t*)0x200000000080 = r[1];
    *(uint64_t*)0x2000000000d8 = 0;
    syscall(__NR_bpf, /*cmd=*/2ul, /*arg=*/0x2000000000c0ul, /*size=*/0x20ul);
    break;
  }
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffffffff000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x200000000000ul, /*len=*/0x1000000ul,
          /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x200001000000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  const char* reason;
  (void)reason;
  for (procid = 0; procid < 5; procid++) {
    if (fork() == 0) {
      use_temporary_dir();
      do_sandbox_none();
    }
  }
  sleep(1000000);
  return 0;
}