// 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 <signal.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.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 < 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);
      if (call == 2)
        break;
      event_timedwait(&th->done, 50);
      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[2] = {0xffffffffffffffff, 0xffffffffffffffff};

void execute_call(int call)
{
  intptr_t res = 0;
  switch (call) {
  case 0:
    //  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 = 0x1 (4 bytes)
    //        ninsn: bytesize8 = 0x8 (4 bytes)
    //        insns: ptr[inout, array[ANYUNION]] {
    //          array[ANYUNION] {
    //            union ANYUNION {
    //              ANYBLOB: buffer: {7a 0a f8 ff 75 25 70 00 bf a1 00 00 00 00
    //              00 00 07 01 00 00 f8 ff ff ff b7 02 00 00 05 00 00 00 bf 13
    //              00 00 00 00 00 00 85 00 00 00 06 00 00 00 b7 00 00 00 00 00
    //              00 00 95 00 00 ff 00 00 00 00 b2 59 52 85 0a 84 a7 00 02 b2
    //              ab 3d 6f fa a6 ea d0 16 91 91 d5 4f 81 96 21 7f c5 63 e2 fc
    //              91 f6 da 4d ad 4f dc 2e b1 b5 98 6f c4 4b c2 5f b5 91 cf 77
    //              b9 df b3 79 a3 f6 11 db c2 a3 64 91 6f 09 8d ab 10 b1 a2 97
    //              cf 52 86 66 d1 dd d7 3f 30 f2 38 2f 6c da 4b fd d4 5b e5 83
    //              82 3c 0f 09 22 48 a5 7d 48 62 1f 3c 1c 65 ee 19 ee 87 5d af
    //              45 00 6a 4c 4e a5 e1 5b 2f 96 18 d5 47 24 4a 22 00 00 00 00
    //              08 00 db 58 36 20 ce 72 43 d1 ae bd b6 38 d9 1d be f6 61 93
    //              58 39 9a a9 c2 ac d0 68 c0 3e fe fd 8b c7 7e df 2d 34 b1 2c
    //              d4 8a 1b 20 fb 7d d8 43 26 7e 03 31 75 9f 4e c6 b5 b0 af 58
    //              e6 04 f4 94 ef f2 89 02 6d 50 45 ef 08 00 00 00 00 00 00 00
    //              77 18 a0 9f 48 86 af c2 6a bb a3 46 35 d0 e8 b5 98 a5 1b c7
    //              42 13 5a 6e 1d 33 fe 22 6c 94 4b c7 6b e4 0d 43 5a a8 b5 20
    //              2d b7 61 01 4b 1b 99 9a 12 df 6b ee 43 1a 66 81 00 00 00 26
    //              3b 62 33 e1 c0 fe 30 e3 84 c3 cb 07 b7 4a 72 29 1a 1a 2b 52
    //              3d d8 1b 66 51 b1 ee 48 e9 99 bb 00 48 23 eb cd 8c 65 74 3f
    //              31 f8 4b 26 3a b9 b3 42 66 92 d0 1a d1 94 f3 02 d7 a6 58 e9
    //              e5 46 87 d3 c5 6d 7b ed b6 b2 f2 5d db 8c 64 0b b3 21 a4 02
    //              05 8c 92 21 b6 87 08 14 cf 4e e2 3d db 79 ff f5 eb 15 6e 0a
    //              00 00 00 00 00 00 f2 bd 1d 4a 17 8d 86 d6 93 5e b8 b7 5b c4
    //              eb 68 0d 10 e8 b6 a5 4c 6c 86 74 ca f6 3f f7 66 22 93 9a 20
    //              d4 aa df 85 db 40 17 9c 2c f8 3e e0 7e 30 a2 79 d8 f9 f3 bc
    //              28 2d eb 43 a0 34 09 f8 e6 97 2f 3f 72 0d 04 59 23 70 2c ed
    //              e0 f3 e9 14 11 f3 f1 b1 6f 06 56 24 f2 80 a7 dc ce 8d b9 10
    //              f9 3c 49 b9 e0 b6 dd 73 56 aa 79 d5 fa bb 5c 0d 0d a6 d7 19
    //              d7 e0 ef b2 bb 71 3d 18 24 2c d5 df 6c a5 33 07 a4 cd d9 1b
    //              e4 58 7f 90 e3 17 c8 de 5e 5c 39 33 fd 5d 5b f3 8f 6b 9f c3
    //              9f c8 29 dc fe 4a f8 ac 5f bb 73 14 a7 a4 33 e0 18 27 67 d1
    //              78 6e da 2b 20} (length 0x26b)
    //            }
    //          }
    //        }
    //        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 {
    //          fallback: bpf_attach_types = 0x0 (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_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 = 0x10 (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 = 0x48 (8 bytes)
    //  ]
    //  returns fd_bpf_prog
    *(uint32_t*)0x200000000000 = 1;
    *(uint32_t*)0x200000000004 = 8;
    *(uint64_t*)0x200000000008 = 0x200000000780;
    memcpy(
        (void*)0x200000000780,
        "\x7a\x0a\xf8\xff\x75\x25\x70\x00\xbf\xa1\x00\x00\x00\x00\x00\x00\x07"
        "\x01\x00\x00\xf8\xff\xff\xff\xb7\x02\x00\x00\x05\x00\x00\x00\xbf\x13"
        "\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\xff\x00\x00\x00\x00\xb2\x59\x52\x85"
        "\x0a\x84\xa7\x00\x02\xb2\xab\x3d\x6f\xfa\xa6\xea\xd0\x16\x91\x91\xd5"
        "\x4f\x81\x96\x21\x7f\xc5\x63\xe2\xfc\x91\xf6\xda\x4d\xad\x4f\xdc\x2e"
        "\xb1\xb5\x98\x6f\xc4\x4b\xc2\x5f\xb5\x91\xcf\x77\xb9\xdf\xb3\x79\xa3"
        "\xf6\x11\xdb\xc2\xa3\x64\x91\x6f\x09\x8d\xab\x10\xb1\xa2\x97\xcf\x52"
        "\x86\x66\xd1\xdd\xd7\x3f\x30\xf2\x38\x2f\x6c\xda\x4b\xfd\xd4\x5b\xe5"
        "\x83\x82\x3c\x0f\x09\x22\x48\xa5\x7d\x48\x62\x1f\x3c\x1c\x65\xee\x19"
        "\xee\x87\x5d\xaf\x45\x00\x6a\x4c\x4e\xa5\xe1\x5b\x2f\x96\x18\xd5\x47"
        "\x24\x4a\x22\x00\x00\x00\x00\x08\x00\xdb\x58\x36\x20\xce\x72\x43\xd1"
        "\xae\xbd\xb6\x38\xd9\x1d\xbe\xf6\x61\x93\x58\x39\x9a\xa9\xc2\xac\xd0"
        "\x68\xc0\x3e\xfe\xfd\x8b\xc7\x7e\xdf\x2d\x34\xb1\x2c\xd4\x8a\x1b\x20"
        "\xfb\x7d\xd8\x43\x26\x7e\x03\x31\x75\x9f\x4e\xc6\xb5\xb0\xaf\x58\xe6"
        "\x04\xf4\x94\xef\xf2\x89\x02\x6d\x50\x45\xef\x08\x00\x00\x00\x00\x00"
        "\x00\x00\x77\x18\xa0\x9f\x48\x86\xaf\xc2\x6a\xbb\xa3\x46\x35\xd0\xe8"
        "\xb5\x98\xa5\x1b\xc7\x42\x13\x5a\x6e\x1d\x33\xfe\x22\x6c\x94\x4b\xc7"
        "\x6b\xe4\x0d\x43\x5a\xa8\xb5\x20\x2d\xb7\x61\x01\x4b\x1b\x99\x9a\x12"
        "\xdf\x6b\xee\x43\x1a\x66\x81\x00\x00\x00\x26\x3b\x62\x33\xe1\xc0\xfe"
        "\x30\xe3\x84\xc3\xcb\x07\xb7\x4a\x72\x29\x1a\x1a\x2b\x52\x3d\xd8\x1b"
        "\x66\x51\xb1\xee\x48\xe9\x99\xbb\x00\x48\x23\xeb\xcd\x8c\x65\x74\x3f"
        "\x31\xf8\x4b\x26\x3a\xb9\xb3\x42\x66\x92\xd0\x1a\xd1\x94\xf3\x02\xd7"
        "\xa6\x58\xe9\xe5\x46\x87\xd3\xc5\x6d\x7b\xed\xb6\xb2\xf2\x5d\xdb\x8c"
        "\x64\x0b\xb3\x21\xa4\x02\x05\x8c\x92\x21\xb6\x87\x08\x14\xcf\x4e\xe2"
        "\x3d\xdb\x79\xff\xf5\xeb\x15\x6e\x0a\x00\x00\x00\x00\x00\x00\xf2\xbd"
        "\x1d\x4a\x17\x8d\x86\xd6\x93\x5e\xb8\xb7\x5b\xc4\xeb\x68\x0d\x10\xe8"
        "\xb6\xa5\x4c\x6c\x86\x74\xca\xf6\x3f\xf7\x66\x22\x93\x9a\x20\xd4\xaa"
        "\xdf\x85\xdb\x40\x17\x9c\x2c\xf8\x3e\xe0\x7e\x30\xa2\x79\xd8\xf9\xf3"
        "\xbc\x28\x2d\xeb\x43\xa0\x34\x09\xf8\xe6\x97\x2f\x3f\x72\x0d\x04\x59"
        "\x23\x70\x2c\xed\xe0\xf3\xe9\x14\x11\xf3\xf1\xb1\x6f\x06\x56\x24\xf2"
        "\x80\xa7\xdc\xce\x8d\xb9\x10\xf9\x3c\x49\xb9\xe0\xb6\xdd\x73\x56\xaa"
        "\x79\xd5\xfa\xbb\x5c\x0d\x0d\xa6\xd7\x19\xd7\xe0\xef\xb2\xbb\x71\x3d"
        "\x18\x24\x2c\xd5\xdf\x6c\xa5\x33\x07\xa4\xcd\xd9\x1b\xe4\x58\x7f\x90"
        "\xe3\x17\xc8\xde\x5e\x5c\x39\x33\xfd\x5d\x5b\xf3\x8f\x6b\x9f\xc3\x9f"
        "\xc8\x29\xdc\xfe\x4a\xf8\xac\x5f\xbb\x73\x14\xa7\xa4\x33\xe0\x18\x27"
        "\x67\xd1\x78\x6e\xda\x2b\x20",
        619);
    *(uint64_t*)0x200000000010 = 0x200000000100;
    memcpy((void*)0x200000000100, "GPL\000", 4);
    *(uint32_t*)0x200000000018 = 0;
    *(uint32_t*)0x20000000001c = 0;
    *(uint64_t*)0x200000000020 = 0;
    *(uint32_t*)0x200000000028 = 0;
    *(uint32_t*)0x20000000002c = 0;
    memset((void*)0x200000000030, 0, 16);
    *(uint32_t*)0x200000000040 = 0;
    *(uint32_t*)0x200000000044 = 0;
    *(uint32_t*)0x200000000048 = -1;
    *(uint32_t*)0x20000000004c = 8;
    *(uint64_t*)0x200000000050 = 0;
    *(uint32_t*)0x200000000058 = 0;
    *(uint32_t*)0x20000000005c = 0x10;
    *(uint64_t*)0x200000000060 = 0;
    *(uint32_t*)0x200000000068 = 0;
    *(uint32_t*)0x20000000006c = 0;
    *(uint32_t*)0x200000000070 = -1;
    *(uint32_t*)0x200000000074 = 0;
    *(uint64_t*)0x200000000078 = 0;
    *(uint64_t*)0x200000000080 = 0;
    *(uint32_t*)0x200000000088 = 0x10;
    *(uint32_t*)0x20000000008c = 0;
    *(uint32_t*)0x200000000090 = 0;
    res = syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x200000000000ul,
                  /*size=*/0x48ul);
    if (res != -1)
      r[0] = res;
    break;
  case 1:
    //  bpf$MAP_CREATE_TAIL_CALL arguments: [
    //    cmd: const = 0x0 (8 bytes)
    //    arg: ptr[inout, array[ANYUNION]] {
    //      array[ANYUNION] {
    //        union ANYUNION {
    //          ANYBLOB: buffer: {03 00 00 00 04 00 00 00 04 00 00 00 0a}
    //          (length 0xd)
    //        }
    //      }
    //    }
    //    size: len = 0x48 (8 bytes)
    //  ]
    //  returns tail_call_map_fd
    memcpy((void*)0x200000001d40,
           "\x03\x00\x00\x00\x04\x00\x00\x00\x04\x00\x00\x00\x0a", 13);
    res = syscall(__NR_bpf, /*cmd=*/0ul, /*arg=*/0x200000001d40ul,
                  /*size=*/0x48ul);
    if (res != -1)
      r[1] = res;
    break;
  case 2:
    //  bpf$MAP_UPDATE_ELEM_TAIL_CALL arguments: [
    //    cmd: const = 0x2 (8 bytes)
    //    arg: ptr[inout, bpf_map_update_tail_call_arg] {
    //      bpf_map_update_tail_call_arg {
    //        map: tail_call_map_update {
    //          in: tail_call_map_fd (resource)
    //          out: tail_call_map (resource)
    //        }
    //        pad = 0x0 (4 bytes)
    //        key: ptr[in, const[0, const]] {
    //          const = 0x0 (4 bytes)
    //        }
    //        val: ptr[in, fd_bpf_prog] {
    //          fd_bpf_prog (resource)
    //        }
    //        flags: const = 0x0 (8 bytes)
    //      }
    //    }
    //    size: len = 0x20 (8 bytes)
    //  ]
    *(uint32_t*)0x200000000280 = r[1];
    *(uint64_t*)0x200000000288 = 0x200000000200;
    *(uint32_t*)0x200000000200 = 0;
    *(uint64_t*)0x200000000290 = 0x200000000240;
    *(uint32_t*)0x200000000240 = r[0];
    *(uint64_t*)0x200000000298 = 0;
    syscall(__NR_bpf, /*cmd=*/2ul, /*arg=*/0x200000000280ul, /*size=*/0x20ul);
    for (int i = 0; i < 32; i++) {
      syscall(__NR_bpf, /*cmd=*/2ul, /*arg=*/0x200000000280ul, /*size=*/0x20ul);
    }
    break;
  case 3:
    //  bpf$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 = 0x1 (4 bytes)
    //        ninsn: bytesize8 = 0x10 (4 bytes)
    //        insns: ptr[inout, array[ANYUNION]] {
    //          array[ANYUNION] {
    //            union ANYUNION {
    //              ANYBLOB: buffer: {18 08 00 00 00 00 00 00 00 00 00 00 00 00
    //              00 00 18 12 00 00} (length 0x14)
    //            }
    //            union ANYUNION {
    //              ANYRES32: ANYRES32 (resource)
    //            }
    //            union ANYUNION {
    //              ANYBLOB: buffer: {00 00 00 00 00 00 00 00 b7 03 00 00 00 00
    //              00 00 85 00 00 00 0c 00 00 00 b7 00 00 00 00 00 00 00 18 01
    //              00 00 00 08 2c 25 00 00 00 00 00 21 20 20 7b 1a f8 ff 00 00
    //              00 00 bf a1 00 00 00 00 00 00 07 01 00 00 f8 ff ff ff b7 02
    //              00 00 08 00 00 00 b7 03 00 00 00 00 00 00 85 00 00 00 07 00
    //              00 00 95} (length 0x61)
    //            }
    //          }
    //        }
    //        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 {
    //          fallback: bpf_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*)0x200000000500 = 1;
    *(uint32_t*)0x200000000504 = 0x10;
    *(uint64_t*)0x200000000508 = 0x200000000bc0;
    memcpy((void*)0x200000000bc0,
           "\x18\x08\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
           "\x18\x12\x00\x00",
           20);
    *(uint32_t*)0x200000000bd4 = r[1];
    memcpy(
        (void*)0x200000000bd8,
        "\x00\x00\x00\x00\x00\x00\x00\x00\xb7\x03\x00\x00\x00\x00\x00\x00\x85"
        "\x00\x00\x00\x0c\x00\x00\x00\xb7\x00\x00\x00\x00\x00\x00\x00\x18\x01"
        "\x00\x00\x00\x08\x2c\x25\x00\x00\x00\x00\x00\x21\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\x85\x00\x00\x00\x07\x00\x00\x00\x95",
        97);
    *(uint64_t*)0x200000000510 = 0x200000000980;
    memcpy((void*)0x200000000980, "GPL\000", 4);
    *(uint32_t*)0x200000000518 = 0;
    *(uint32_t*)0x20000000051c = 0;
    *(uint64_t*)0x200000000520 = 0;
    *(uint32_t*)0x200000000528 = 0;
    *(uint32_t*)0x20000000052c = 0;
    memset((void*)0x200000000530, 0, 16);
    *(uint32_t*)0x200000000540 = 0;
    *(uint32_t*)0x200000000544 = 0;
    *(uint32_t*)0x200000000548 = -1;
    *(uint32_t*)0x20000000054c = 0;
    *(uint64_t*)0x200000000550 = 0;
    *(uint32_t*)0x200000000558 = 0;
    *(uint32_t*)0x20000000055c = 0;
    *(uint64_t*)0x200000000560 = 0;
    *(uint32_t*)0x200000000568 = 0;
    *(uint32_t*)0x20000000056c = 0;
    *(uint32_t*)0x200000000570 = 0;
    *(uint32_t*)0x200000000574 = 0;
    *(uint64_t*)0x200000000578 = 0;
    *(uint64_t*)0x200000000580 = 0;
    *(uint32_t*)0x200000000588 = 0;
    *(uint32_t*)0x20000000058c = 0;
    *(uint32_t*)0x200000000590 = 0;
    syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x200000000500ul, /*size=*/0x94ul);
    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;
}