// https://syzkaller.appspot.com/bug?id=23eb16a86ae97aa630cbdeb9a7788659b9582ba7
// 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 <signal.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mount.h>
#include <sys/prctl.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.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 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;
}

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");
}

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 < 12; 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 + (call == 0 ? 500 : 0));
      break;
    }
  }
  for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++)
    sleep_ms(1);
}

static void execute_one(void);

#define WAIT_FLAGS __WALL

static void loop(void)
{
  int iter = 0;
  for (;; iter++) {
    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 (;;) {
      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;
    }
  }
}

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

void execute_call(int call)
{
  intptr_t res = 0;
  switch (call) {
  case 0:
    //  bpf$BPF_PROG_WITH_BTFID_LOAD arguments: [
    //    cmd: const = 0x5 (8 bytes)
    //    arg: ptr[in, bpf_prog_with_btfid] {
    //      union bpf_prog_with_btfid {
    //        bpf_lsm: bpf_prog_t[const[BPF_PROG_TYPE_LSM, int32],
    //        const[BPF_LSM_MAC, int32], bpf_lsm_btf_id[opt], const[0, int32]] {
    //          type: const = 0x6 (4 bytes)
    //          ninsn: bytesize8 = 0x3 (4 bytes)
    //          insns: ptr[inout, array[ANYUNION]] {
    //            array[ANYUNION] {
    //              union ANYUNION {
    //                ANYBLOB: buffer: {18 00 00 00 00 3f 00 00 00 00 00 00 00
    //                00 00 f1 95} (length 0x11)
    //              }
    //            }
    //          }
    //          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: const = 0x1b (4 bytes)
    //          btf_fd: fd_btf (resource)
    //          func_info_rec_size: const = 0x8 (4 bytes)
    //          func_info: nil
    //          func_info_cnt: len = 0x0 (4 bytes)
    //          line_info_rec_size: const = 0x10 (4 bytes)
    //          line_info: nil
    //          line_info_cnt: len = 0x0 (4 bytes)
    //          attach_btf_id: bpf_lsm_btf_id (resource)
    //          attach_prog_fd: const = 0x0 (4 bytes)
    //          core_relo_cnt: len = 0x0 (4 bytes)
    //          fd_array: nil
    //          core_relos: nil
    //          core_relo_rec_size: const = 0x10 (4 bytes)
    //          log_true_size: int32 = 0x0 (4 bytes)
    //          prog_token_fd: union _bpf_prog_t[const[BPF_PROG_TYPE_LSM,
    //          int32], const[BPF_LSM_MAC, int32], bpf_lsm_btf_id[opt], const[0,
    //          int32]]_prog_token_fd_wrapper {
    //            void: buffer: {} (length 0x0)
    //          }
    //          pad: union _bpf_prog_t[const[BPF_PROG_TYPE_LSM, int32],
    //          const[BPF_LSM_MAC, int32], bpf_lsm_btf_id[opt], const[0,
    //          int32]]_pad_wrapper {
    //            value: const = 0x0 (4 bytes)
    //          }
    //        }
    //      }
    //    }
    //    size: len = 0x94 (8 bytes)
    //  ]
    //  returns fd_bpf_prog_with_btfid
    *(uint32_t*)0x200000000400 = 6;
    *(uint32_t*)0x200000000404 = 3;
    *(uint64_t*)0x200000000408 = 0x2000000003c0;
    memcpy(
        (void*)0x2000000003c0,
        "\x18\x00\x00\x00\x00\x3f\x00\x00\x00\x00\x00\x00\x00\x00\x00\xf1\x95",
        17);
    *(uint64_t*)0x200000000410 = 0x200000000140;
    memcpy((void*)0x200000000140, "GPL\000", 4);
    *(uint32_t*)0x200000000418 = 0;
    *(uint32_t*)0x20000000041c = 0;
    *(uint64_t*)0x200000000420 = 0;
    *(uint32_t*)0x200000000428 = 0;
    *(uint32_t*)0x20000000042c = 0;
    memset((void*)0x200000000430, 0, 16);
    *(uint32_t*)0x200000000440 = 0;
    *(uint32_t*)0x200000000444 = 0x1b;
    *(uint32_t*)0x200000000448 = -1;
    *(uint32_t*)0x20000000044c = 8;
    *(uint64_t*)0x200000000450 = 0;
    *(uint32_t*)0x200000000458 = 0;
    *(uint32_t*)0x20000000045c = 0x10;
    *(uint64_t*)0x200000000460 = 0;
    *(uint32_t*)0x200000000468 = 0;
    *(uint32_t*)0x20000000046c = 0;
    *(uint32_t*)0x200000000470 = 0;
    *(uint32_t*)0x200000000474 = 0;
    *(uint64_t*)0x200000000478 = 0;
    *(uint64_t*)0x200000000480 = 0;
    *(uint32_t*)0x200000000488 = 0x10;
    *(uint32_t*)0x20000000048c = 0;
    *(uint32_t*)0x200000000490 = 0;
    res = syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x200000000400ul,
                  /*size=*/0x94ul);
    if (res != -1)
      r[0] = res;
    break;
  case 1:
    //  bpf$ITER_CREATE arguments: [
    //    cmd: const = 0xb (8 bytes)
    //    arg: ptr[in, bpf_iter_create_arg] {
    //      bpf_iter_create_arg {
    //        link_fd: fd_bpf_link (resource)
    //        flags: const = 0x0 (4 bytes)
    //      }
    //    }
    //    size: len = 0x8 (8 bytes)
    //  ]
    //  returns fd
    *(uint32_t*)0x2000000004c0 = r[0];
    *(uint32_t*)0x2000000004c4 = 0;
    res = syscall(__NR_bpf, /*cmd=*/0xbul, /*arg=*/0x2000000004c0ul,
                  /*size=*/8ul);
    if (res != -1)
      r[1] = res;
    break;
  case 2:
    //  close arguments: [
    //    fd: fd (resource)
    //  ]
    syscall(__NR_close, /*fd=*/r[1]);
    break;
  case 3:
    //  socket$kcm arguments: [
    //    domain: const = 0xa (8 bytes)
    //    type: kcm_socket_type = 0x1 (8 bytes)
    //    proto: const = 0x0 (4 bytes)
    //  ]
    //  returns sock_kcm
    res = syscall(__NR_socket, /*domain=*/0xaul, /*type=*/1ul, /*proto=*/0);
    if (res != -1)
      r[2] = res;
    break;
  case 4:
    //  setsockopt$sock_attach_bpf arguments: [
    //    fd: sock (resource)
    //    level: const = 0x6 (4 bytes)
    //    optname: const = 0x1f (4 bytes)
    //    optval: ptr[in, fd_bpf_prog] {
    //      fd_bpf_prog (resource)
    //    }
    //    optlen: len = 0x4 (8 bytes)
    //  ]
    *(uint32_t*)0x200000000080 = -1;
    syscall(__NR_setsockopt, /*fd=*/r[2], /*level=*/6, /*optname=*/0x1f,
            /*optval=*/0x200000000080ul, /*optlen=*/4ul);
    break;
  case 5:
    //  socket$nl_generic arguments: [
    //    domain: const = 0x10 (8 bytes)
    //    type: const = 0x3 (8 bytes)
    //    proto: const = 0x10 (4 bytes)
    //  ]
    //  returns sock_nl_generic
    res = syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/0x10);
    if (res != -1)
      r[3] = res;
    break;
  case 6:
    //  socket$kcm arguments: [
    //    domain: const = 0x10 (8 bytes)
    //    type: kcm_socket_type = 0x2 (8 bytes)
    //    proto: const = 0x10 (4 bytes)
    //  ]
    //  returns sock_kcm
    res = syscall(__NR_socket, /*domain=*/0x10ul, /*type=SOCK_DGRAM*/ 2ul,
                  /*proto=*/0x10);
    if (res != -1)
      r[4] = res;
    break;
  case 7:
    //  sendmsg$kcm arguments: [
    //    fd: sock_kcm (resource)
    //    msg: ptr[in, send_msghdr] {
    //      send_msghdr {
    //        msg_name: nil
    //        msg_namelen: len = 0x0 (4 bytes)
    //        pad = 0x0 (4 bytes)
    //        msg_iov: ptr[in, array[iovec[in, array[int8]]]] {
    //          array[iovec[in, array[int8]]] {
    //            iovec[in, array[int8]] {
    //              addr: ptr[in, buffer] {
    //                buffer: {14 00 00 00 10 00 35 07 d2 5a 80 6f 8c 63 94 f9
    //                03 24 fc 60} (length 0x14)
    //              }
    //              len: len = 0x14 (8 bytes)
    //            }
    //          }
    //        }
    //        msg_iovlen: len = 0x1 (8 bytes)
    //        msg_control: nil
    //        msg_controllen: bytesize = 0x0 (8 bytes)
    //        msg_flags: const = 0x0 (4 bytes)
    //        pad = 0x0 (4 bytes)
    //      }
    //    }
    //    f: send_flags = 0x200a4800 (8 bytes)
    //  ]
    *(uint64_t*)0x2000000000c0 = 0;
    *(uint32_t*)0x2000000000c8 = 0;
    *(uint64_t*)0x2000000000d0 = 0x200000000480;
    *(uint64_t*)0x200000000480 = 0x200000000000;
    memcpy((void*)0x200000000000,
           "\x14\x00\x00\x00\x10\x00\x35\x07\xd2\x5a\x80\x6f\x8c\x63\x94\xf9"
           "\x03\x24\xfc\x60",
           20);
    *(uint64_t*)0x200000000488 = 0x14;
    *(uint64_t*)0x2000000000d8 = 1;
    *(uint64_t*)0x2000000000e0 = 0;
    *(uint64_t*)0x2000000000e8 = 0;
    *(uint32_t*)0x2000000000f0 = 0;
    syscall(__NR_sendmsg, /*fd=*/r[4], /*msg=*/0x2000000000c0ul,
            /*f=MSG_FASTOPEN|MSG_NOSIGNAL|MSG_CONFIRM|0xa0000*/ 0x200a4800ul);
    break;
  case 8:
    //  recvmsg$kcm arguments: [
    //    fd: sock_kcm (resource)
    //    msg: ptr[inout, recv_msghdr] {
    //      recv_msghdr {
    //        msg_name: nil
    //        msg_namelen: len = 0xfffffffffffffcb4 (4 bytes)
    //        pad = 0x0 (4 bytes)
    //        msg_iov: ptr[in, array[iovec[out, array[int8]]]] {
    //          array[iovec[out, array[int8]]] {
    //            iovec[out, array[int8]] {
    //              addr: ptr[out, buffer] {
    //                buffer: (DirOut)
    //              }
    //              len: len = 0x1027 (8 bytes)
    //            }
    //          }
    //        }
    //        msg_iovlen: len = 0x1 (8 bytes)
    //        msg_control: nil
    //        msg_controllen: bytesize = 0x0 (8 bytes)
    //        msg_flags: const = 0x0 (4 bytes)
    //        pad = 0x0 (4 bytes)
    //      }
    //    }
    //    f: recv_flags = 0x120 (8 bytes)
    //  ]
    *(uint64_t*)0x200000000100 = 0;
    *(uint32_t*)0x200000000108 = 0xfffffcb4;
    *(uint64_t*)0x200000000110 = 0x200000000040;
    *(uint64_t*)0x200000000040 = 0x2000000004c0;
    *(uint64_t*)0x200000000048 = 0x1027;
    *(uint64_t*)0x200000000118 = 1;
    *(uint64_t*)0x200000000120 = 0;
    *(uint64_t*)0x200000000128 = 0;
    *(uint32_t*)0x200000000130 = 0;
    syscall(__NR_recvmsg, /*fd=*/r[4], /*msg=*/0x200000000100ul,
            /*f=MSG_WAITALL|MSG_TRUNC*/ 0x120ul, 0);
    break;
  case 9:
    //  sendmsg$nl_xfrm arguments: [
    //    fd: sock_nl_xfrm (resource)
    //    msg: ptr[in, msghdr_netlink[netlink_msg_xfrm]] {
    //      msghdr_netlink[netlink_msg_xfrm] {
    //        addr: nil
    //        addrlen: len = 0x0 (4 bytes)
    //        pad = 0x0 (4 bytes)
    //        vec: nil
    //        vlen: const = 0x1 (8 bytes)
    //        ctrl: const = 0x0 (8 bytes)
    //        ctrllen: const = 0x0 (8 bytes)
    //        f: send_flags = 0x20040041 (4 bytes)
    //        pad = 0x0 (4 bytes)
    //      }
    //    }
    //    f: send_flags = 0x800 (8 bytes)
    //  ]
    *(uint64_t*)0x200000000540 = 0;
    *(uint32_t*)0x200000000548 = 0;
    *(uint64_t*)0x200000000550 = 0;
    *(uint64_t*)0x200000000558 = 1;
    *(uint64_t*)0x200000000560 = 0;
    *(uint64_t*)0x200000000568 = 0;
    *(uint32_t*)0x200000000570 = 0x20040041;
    syscall(__NR_sendmsg, /*fd=*/(intptr_t)-1, /*msg=*/0x200000000540ul,
            /*f=MSG_CONFIRM*/ 0x800ul);
    break;
  case 10:
    //  sendmsg$NFT_BATCH arguments: [
    //    fd: sock_nl_netfilter (resource)
    //    msg: ptr[in, msghdr_netlink[nft_batch_msg]] {
    //      msghdr_netlink[nft_batch_msg] {
    //        addr: nil
    //        addrlen: len = 0x0 (4 bytes)
    //        pad = 0x0 (4 bytes)
    //        vec: nil
    //        vlen: const = 0x1 (8 bytes)
    //        ctrl: const = 0x0 (8 bytes)
    //        ctrllen: const = 0x0 (8 bytes)
    //        f: send_flags = 0x10 (4 bytes)
    //        pad = 0x0 (4 bytes)
    //      }
    //    }
    //    f: send_flags = 0x4000880 (8 bytes)
    //  ]
    *(uint64_t*)0x200000000000 = 0;
    *(uint32_t*)0x200000000008 = 0;
    *(uint64_t*)0x200000000010 = 0;
    *(uint64_t*)0x200000000018 = 1;
    *(uint64_t*)0x200000000020 = 0;
    *(uint64_t*)0x200000000028 = 0;
    *(uint32_t*)0x200000000030 = 0x10;
    syscall(__NR_sendmsg, /*fd=*/(intptr_t)-1, /*msg=*/0x200000000000ul,
            /*f=MSG_ZEROCOPY|MSG_EOR|MSG_CONFIRM*/ 0x4000880ul);
    break;
  case 11:
    //  sendmsg$nl_generic arguments: [
    //    fd: sock_nl_generic (resource)
    //    msg: ptr[in, msghdr_netlink[netlink_msg_t[netlink_random_msg_type,
    //    genlmsghdr, nl_generic_attr]]] {
    //      msghdr_netlink[netlink_msg_t[netlink_random_msg_type, genlmsghdr,
    //      nl_generic_attr]] {
    //        addr: nil
    //        addrlen: len = 0x0 (4 bytes)
    //        pad = 0x0 (4 bytes)
    //        vec: ptr[in, iovec[in, netlink_msg_t[netlink_random_msg_type,
    //        genlmsghdr, nl_generic_attr]]] {
    //          iovec[in, netlink_msg_t[netlink_random_msg_type, genlmsghdr,
    //          nl_generic_attr]] {
    //            addr: ptr[inout, array[ANYUNION]] {
    //              array[ANYUNION] {
    //                union ANYUNION {
    //                  ANYBLOB: buffer: {a8 14 00 00 2a 00 07 01 27 bd 70 00 00
    //                  00 00 00 01 7c 00 00 0c 00 02 80 05 00 7c 80 28 00 00 00
    //                  04 00 07 00 0c} (length 0x25)
    //                }
    //              }
    //            }
    //            len: len = 0x14a8 (8 bytes)
    //          }
    //        }
    //        vlen: const = 0x1 (8 bytes)
    //        ctrl: const = 0x0 (8 bytes)
    //        ctrllen: const = 0x0 (8 bytes)
    //        f: send_flags = 0x800 (4 bytes)
    //        pad = 0x0 (4 bytes)
    //      }
    //    }
    //    f: send_flags = 0x4040 (8 bytes)
    //  ]
    *(uint64_t*)0x200000000140 = 0;
    *(uint32_t*)0x200000000148 = 0;
    *(uint64_t*)0x200000000150 = 0x200000000180;
    *(uint64_t*)0x200000000180 = 0x200000000000;
    memcpy((void*)0x200000000000,
           "\xa8\x14\x00\x00\x2a\x00\x07\x01\x27\xbd\x70\x00\x00\x00\x00\x00"
           "\x01\x7c\x00\x00\x0c\x00\x02\x80\x05\x00\x7c\x80\x28\x00\x00\x00"
           "\x04\x00\x07\x00\x0c",
           37);
    *(uint64_t*)0x200000000188 = 0x14a8;
    *(uint64_t*)0x200000000158 = 1;
    *(uint64_t*)0x200000000160 = 0;
    *(uint64_t*)0x200000000168 = 0;
    *(uint32_t*)0x200000000170 = 0x800;
    syscall(__NR_sendmsg, /*fd=*/r[3], /*msg=*/0x200000000140ul,
            /*f=MSG_NOSIGNAL|MSG_DONTWAIT*/ 0x4040ul);
    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) {
      loop();
    }
  }
  sleep(1000000);
  return 0;
}