// https://syzkaller.appspot.com/bug?id=83a3419ccad1bccf2b6fa5d3e33e5f7bae13e1c3
// 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 <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/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>

static unsigned long long procid;

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

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

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

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

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

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

static void thread_start(void* (*fn)(void*), void* arg)
{
  pthread_t th;
  pthread_attr_t attr;
  pthread_attr_init(&attr);
  pthread_attr_setstacksize(&attr, 128 << 10);
  int i = 0;
  for (; i < 100; i++) {
    if (pthread_create(&th, &attr, fn, arg) == 0) {
      pthread_attr_destroy(&attr);
      return;
    }
    if (errno == EAGAIN) {
      usleep(50);
      continue;
    }
    break;
  }
  exit(1);
}

typedef struct {
  int state;
} event_t;

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

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

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

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

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

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

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

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 < 23; 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);
}

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[3] = {0xffffffffffffffff, 0x0, 0xffffffffffffffff};

void execute_call(int call)
{
  intptr_t res = 0;
  switch (call) {
  case 0:
    //  setsockopt$inet6_tcp_TCP_CONGESTION arguments: [
    //    fd: sock_tcp6 (resource)
    //    level: const = 0x6 (4 bytes)
    //    optname: const = 0xd (4 bytes)
    //    optval: ptr[in, buffer] {
    //      buffer: {76 65 6e 6f} (length 0x4)
    //    }
    //    optlen: len = 0x4 (8 bytes)
    //  ]
    NONFAILING(memcpy((void*)0x200000000000, "veno", 4));
    syscall(__NR_setsockopt, /*fd=*/(intptr_t)-1, /*level=*/6, /*optname=*/0xd,
            /*optval=*/0x200000000000ul, /*optlen=*/4ul);
    break;
  case 1:
    //  bind$inet6 arguments: [
    //    fd: sock_in6 (resource)
    //    addr: ptr[in, sockaddr_in6] {
    //      sockaddr_in6 {
    //        family: const = 0xa (2 bytes)
    //        port: int16be = 0x2 (2 bytes)
    //        flow: int32be = 0x200 (4 bytes)
    //        addr: union ipv6_addr {
    //          loopback: ipv6_addr_loopback {
    //            a0: const = 0x0 (8 bytes)
    //            a1: const = 0x1 (8 bytes)
    //          }
    //        }
    //        scope: int32 = 0x7 (4 bytes)
    //      }
    //    }
    //    addrlen: len = 0x1c (8 bytes)
    //  ]
    NONFAILING(*(uint16_t*)0x200000000080 = 0xa);
    NONFAILING(*(uint16_t*)0x200000000082 = htobe16(2));
    NONFAILING(*(uint32_t*)0x200000000084 = htobe32(0x200));
    NONFAILING(*(uint64_t*)0x200000000088 = htobe64(0));
    NONFAILING(*(uint64_t*)0x200000000090 = htobe64(1));
    NONFAILING(*(uint32_t*)0x200000000098 = 7);
    syscall(__NR_bind, /*fd=*/(intptr_t)-1, /*addr=*/0x200000000080ul,
            /*addrlen=*/0x1cul);
    break;
  case 2:
    //  setsockopt$inet6_tcp_int arguments: [
    //    fd: sock_tcp6 (resource)
    //    level: const = 0x6 (4 bytes)
    //    optname: tcp_option_types_int = 0x2000000000000022 (4 bytes)
    //    optval: nil
    //    optlen: len = 0x0 (8 bytes)
    //  ]
    syscall(__NR_setsockopt, /*fd=*/(intptr_t)-1, /*level=*/6,
            /*optname=TCP_FASTOPEN_NO_COOKIE*/ 0x22, /*optval=*/0ul,
            /*optlen=*/0ul);
    break;
  case 3:
    //  sendto$inet6 arguments: [
    //    fd: sock_in6 (resource)
    //    buf: ptr[in, buffer] {
    //      buffer: {} (length 0x0)
    //    }
    //    len: len = 0x0 (8 bytes)
    //    f: send_flags = 0x20000045 (8 bytes)
    //    addr: nil
    //    addrlen: len = 0x0 (8 bytes)
    //  ]
    syscall(__NR_sendto, /*fd=*/(intptr_t)-1, /*buf=*/0x200000000280ul,
            /*len=*/0ul,
            /*f=MSG_FASTOPEN|MSG_OOB|MSG_DONTWAIT|MSG_DONTROUTE*/ 0x20000045ul,
            /*addr=*/0ul, /*addrlen=*/0ul);
    break;
  case 4:
    //  openat$uinput arguments: [
    //    fd: const = 0xffffffffffffff9c (8 bytes)
    //    file: ptr[in, buffer] {
    //      buffer: {2f 64 65 76 2f 75 69 6e 70 75 74 00} (length 0xc)
    //    }
    //    flags: uinput_open_flags = 0x2 (4 bytes)
    //    mode: const = 0x0 (2 bytes)
    //  ]
    //  returns fd_uinput
    NONFAILING(memcpy((void*)0x2000000000c0, "/dev/uinput\000", 12));
    res = syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul,
                  /*file=*/0x2000000000c0ul, /*flags=O_RDWR*/ 2, /*mode=*/0);
    if (res != -1)
      r[0] = res;
    break;
  case 5:
    //  ioctl$UI_DEV_CREATE arguments: [
    //    fd: fd_uinput (resource)
    //    cmd: const = 0x5501 (4 bytes)
    //  ]
    syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0x5501, 0);
    break;
  case 6:
    //  timer_create arguments: [
    //    id: clock_id = 0x0 (8 bytes)
    //    ev: ptr[in, sigevent] {
    //      sigevent {
    //        val: const = 0x0 (8 bytes)
    //        signo: int32 = 0x21 (4 bytes)
    //        notify: sigev_notify = 0x2 (4 bytes)
    //        u: union sigevent_u {
    //          thr: sigevent_thread {
    //            func: nil
    //            attr: nil
    //          }
    //        }
    //        pad = 0x0 (32 bytes)
    //      }
    //    }
    //    timerid: ptr[out, timerid] {
    //      timerid (resource)
    //    }
    //  ]
    NONFAILING(*(uint64_t*)0x2000000000c0 = 0);
    NONFAILING(*(uint32_t*)0x2000000000c8 = 0x21);
    NONFAILING(*(uint32_t*)0x2000000000cc = 2);
    NONFAILING(*(uint64_t*)0x2000000000d0 = 0);
    NONFAILING(*(uint64_t*)0x2000000000d8 = 0);
    res = syscall(__NR_timer_create, /*id=*/0ul, /*ev=*/0x2000000000c0ul,
                  /*timerid=*/0x200000000300ul);
    if (res != -1)
      NONFAILING(r[1] = *(uint32_t*)0x200000000300);
    break;
  case 7:
    //  fcntl$lock arguments: [
    //    fd: fd (resource)
    //    cmd: fcntl_lock = 0x24 (8 bytes)
    //    lock: ptr[in, flock] {
    //      flock {
    //        type: flock_type = 0x0 (2 bytes)
    //        whence: seek_whence = 0x0 (2 bytes)
    //        pad = 0x0 (4 bytes)
    //        start: intptr = 0x10001 (8 bytes)
    //        len: intptr = 0x5 (8 bytes)
    //        pid: pid (resource)
    //        pad = 0x0 (4 bytes)
    //      }
    //    }
    //  ]
    NONFAILING(*(uint16_t*)0x200000000040 = 0);
    NONFAILING(*(uint16_t*)0x200000000042 = 0);
    NONFAILING(*(uint64_t*)0x200000000048 = 0x10001);
    NONFAILING(*(uint64_t*)0x200000000050 = 5);
    NONFAILING(*(uint32_t*)0x200000000058 = 0);
    syscall(__NR_fcntl, /*fd=*/(intptr_t)-1, /*cmd=F_OFD_GETLK*/ 0x24ul,
            /*lock=*/0x200000000040ul);
    break;
  case 8:
    //  mprotect arguments: [
    //    addr: VMA[0xf000]
    //    len: len = 0xf000 (8 bytes)
    //    prot: mmap_prot = 0x1 (8 bytes)
    //  ]
    syscall(__NR_mprotect, /*addr=*/0x200000000000ul, /*len=*/0xf000ul,
            /*prot=PROT_READ*/ 1ul);
    break;
  case 9:
    //  timer_settime arguments: [
    //    timerid: timerid (resource)
    //    flags: timer_flags = 0x1 (8 bytes)
    //    new: ptr[in, itimerspec] {
    //      itimerspec {
    //        interv: timespec {
    //          sec: time_sec (resource)
    //          nsec: time_nsec (resource)
    //        }
    //        value: timespec {
    //          sec: time_sec (resource)
    //          nsec: time_nsec (resource)
    //        }
    //      }
    //    }
    //    old: nil
    //  ]
    NONFAILING(*(uint64_t*)0x200000000040 = 0);
    NONFAILING(*(uint64_t*)0x200000000048 = 0);
    NONFAILING(*(uint64_t*)0x200000000050 = 0);
    NONFAILING(*(uint64_t*)0x200000000058 = 0x989680);
    syscall(__NR_timer_settime, /*timerid=*/r[1], /*flags=TIMER_ABSTIME*/ 1ul,
            /*new=*/0x200000000040ul, /*old=*/0ul);
    break;
  case 10:
    //  mmap arguments: [
    //    addr: VMA[0x200000]
    //    len: len = 0x200000 (8 bytes)
    //    prot: mmap_prot = 0x300000b (8 bytes)
    //    flags: mmap_flags = 0x204031 (8 bytes)
    //    fd: fd (resource)
    //    offset: intptr = 0xec776000 (8 bytes)
    //  ]
    syscall(__NR_mmap, /*addr=*/0x200000000000ul, /*len=*/0x200000ul,
            /*prot=PROT_GROWSUP|PROT_GROWSDOWN|PROT_SEM|PROT_WRITE|PROT_READ*/
            0x300000bul,
            /*flags=MAP_NORESERVE|MAP_FIXED|MAP_ANONYMOUS|MAP_SHARED|0x200000*/
            0x204031ul, /*fd=*/(intptr_t)-1, /*offset=*/0xec776000ul);
    break;
  case 11:
    //  prlimit64 arguments: [
    //    pid: pid (resource)
    //    res: rlimit_type = 0xe (8 bytes)
    //    new: ptr[in, rlimit] {
    //      rlimit {
    //        soft: intptr = 0x8 (8 bytes)
    //        hard: intptr = 0x80000100008b (8 bytes)
    //      }
    //    }
    //    old: nil
    //  ]
    NONFAILING(*(uint64_t*)0x200000000100 = 8);
    NONFAILING(*(uint64_t*)0x200000000108 = 0x80000100008b);
    syscall(__NR_prlimit64, /*pid=*/0, /*res=RLIMIT_RTPRIO*/ 0xeul,
            /*new=*/0x200000000100ul, /*old=*/0ul);
    break;
  case 12:
    //  sched_setscheduler arguments: [
    //    pid: pid (resource)
    //    policy: sched_policy = 0x1 (8 bytes)
    //    prio: ptr[in, int32] {
    //      int32 = 0x7 (4 bytes)
    //    }
    //  ]
    NONFAILING(*(uint32_t*)0x200000000300 = 7);
    syscall(__NR_sched_setscheduler, /*pid=*/0, /*policy=SCHED_FIFO*/ 1ul,
            /*prio=*/0x200000000300ul);
    break;
  case 13:
    //  readv arguments: [
    //    fd: fd (resource)
    //    vec: ptr[in, array[iovec[out, array[int8]]]] {
    //      array[iovec[out, array[int8]]] {
    //        iovec[out, array[int8]] {
    //          addr: ptr[out, buffer] {
    //            buffer: (DirOut)
    //          }
    //          len: len = 0x18 (8 bytes)
    //        }
    //      }
    //    }
    //    vlen: len = 0x1 (8 bytes)
    //  ]
    NONFAILING(*(uint64_t*)0x200000000140 = 0x200000000040);
    NONFAILING(*(uint64_t*)0x200000000148 = 0x18);
    syscall(__NR_readv, /*fd=*/r[0], /*vec=*/0x200000000140ul, /*vlen=*/1ul);
    break;
  case 14:
    //  ioctl$TIOCSETD arguments: [
    //    fd: fd_tty (resource)
    //    cmd: const = 0x5423 (4 bytes)
    //    arg: nil
    //  ]
    syscall(__NR_ioctl, /*fd=*/(intptr_t)-1, /*cmd=*/0x5423, /*arg=*/0ul);
    break;
  case 15:
    //  fcntl$dupfd arguments: [
    //    fd: fd (resource)
    //    cmd: fcntl_dupfd = 0x0 (8 bytes)
    //    arg: fd (resource)
    //  ]
    //  returns fd
    res = syscall(__NR_fcntl, /*fd=*/(intptr_t)-1, /*cmd=*/0ul,
                  /*arg=*/(intptr_t)-1);
    if (res != -1)
      r[2] = res;
    break;
  case 16:
    //  getsockopt$inet_sctp6_SCTP_SOCKOPT_CONNECTX3 arguments: [
    //    fd: sock_sctp6 (resource)
    //    level: const = 0x84 (4 bytes)
    //    opt: const = 0x6f (4 bytes)
    //    val: ptr[inout, sctp_getaddrs_old] {
    //      sctp_getaddrs_old {
    //        assoc_id: assoc_id (resource)
    //        addr_num: bytesize = 0x0 (4 bytes)
    //        addrs: nil
    //      }
    //    }
    //    len: ptr[inout, len] {
    //      len = 0x10 (4 bytes)
    //    }
    //  ]
    NONFAILING(*(uint32_t*)0x200000000280 = 0);
    NONFAILING(*(uint32_t*)0x200000000284 = 0);
    NONFAILING(*(uint64_t*)0x200000000288 = 0);
    NONFAILING(*(uint32_t*)0x2000000002c0 = 0x10);
    syscall(__NR_getsockopt, /*fd=*/(intptr_t)-1, /*level=*/0x84, /*opt=*/0x6f,
            /*val=*/0x200000000280ul, /*len=*/0x2000000002c0ul);
    break;
  case 17:
    //  getsockopt$inet_sctp6_SCTP_MAX_BURST arguments: [
    //    fd: sock_sctp6 (resource)
    //    level: const = 0x84 (4 bytes)
    //    opt: const = 0x83 (4 bytes)
    //    val: nil
    //    len: nil
    //  ]
    syscall(__NR_getsockopt, /*fd=*/(intptr_t)-1, /*level=*/0x84, /*opt=*/0x83,
            /*val=*/0ul, /*len=*/0ul);
    break;
  case 18:
    //  setsockopt$inet_sctp6_SCTP_ENABLE_STREAM_RESET arguments: [
    //    fd: sock_sctp6 (resource)
    //    level: const = 0x84 (4 bytes)
    //    opt: const = 0x76 (4 bytes)
    //    val: nil
    //    len: len = 0x0 (8 bytes)
    //  ]
    syscall(__NR_setsockopt, /*fd=*/r[2], /*level=*/0x84, /*opt=*/0x76,
            /*val=*/0ul, /*len=*/0ul);
    break;
  case 19:
    //  ioctl$TCFLSH arguments: [
    //    fd: fd_tty (resource)
    //    cmd: const = 0x400455c8 (4 bytes)
    //    arg: intptr = 0x20000000009 (8 bytes)
    //  ]
    syscall(__NR_ioctl, /*fd=*/r[2], /*cmd=*/0x400455c8,
            /*arg=*/0x20000000009ul);
    break;
  case 20:
    //  ioctl$TIOCVHANGUP arguments: [
    //    fd: fd_tty (resource)
    //    cmd: const = 0x5437 (4 bytes)
    //    arg: const = 0x0 (8 bytes)
    //  ]
    syscall(__NR_ioctl, /*fd=*/(intptr_t)-1, /*cmd=*/0x5437, /*arg=*/0ul);
    break;
  case 21:
    //  setsockopt$IPT_SO_SET_REPLACE arguments: [
    //    fd: sock_in (resource)
    //    level: const = 0x0 (4 bytes)
    //    opt: const = 0x40 (4 bytes)
    //    val: ptr[in, ipt_replace] {
    //      union ipt_replace {
    //        raw: ipt_replace_t["raw", 2, 3, IPT_RAW_VALID_HOOKS,
    //        ipt_raw_matches, ipt_raw_targets, ipt_hook, ipt_unused,
    //        ipt_unused, ipt_hook, ipt_unused, ipt_hook, ipt_unused,
    //        ipt_unused, ipt_hook, ipt_unused] {
    //          name: buffer: {72 61 77 00 00 00 00 00 00 00 00 00 00 00 00 00
    //          00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00} (length 0x20)
    //          valid_hooks: const = 0x9 (4 bytes)
    //          num_entries: const = 0x3 (4 bytes)
    //          size: bytesize = 0x290 (4 bytes)
    //          hook_pre_routing: const = 0xd0 (4 bytes)
    //          hook_local_in: const = 0xffffffff (4 bytes)
    //          hook_forward: const = 0xffffffff (4 bytes)
    //          hook_local_out: const = 0x0 (4 bytes)
    //          hook_post_routing: const = 0xffffffff (4 bytes)
    //          underflow_pre_routing: const = 0x1f8 (4 bytes)
    //          underflow_local_in: const = 0xffffffff (4 bytes)
    //          underflow_forward: const = 0xffffffff (4 bytes)
    //          underflow_local_out: const = 0x1f8 (4 bytes)
    //          underflow_post_routing: const = 0xffffffff (4 bytes)
    //          num_counters: const = 0x3 (4 bytes)
    //          counters: nil
    //          entries: ipt_replace_entries[2, ipt_raw_matches,
    //          ipt_raw_targets] {
    //            entries: array[ipt_entry[ipt_raw_matches, ipt_raw_targets]] {
    //              ipt_entry[ipt_raw_matches, ipt_raw_targets] {
    //                matches: ipt_entry_matches[ipt_raw_matches] {
    //                  ip: union ipt_ip_or_uncond {
    //                    uncond: buffer: {00 00 00 00 00 00 00 00 00 00 00 00
    //                    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    //                    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    //                    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    //                    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00}
    //                    (length 0x54)
    //                  }
    //                  nfcache: const = 0x0 (4 bytes)
    //                  target_offset: len = 0x70 (2 bytes)
    //                  next_offset: len = 0xd0 (2 bytes)
    //                  comefrom: const = 0x0 (4 bytes)
    //                  counters: xt_counters {
    //                    pcnt: const = 0x0 (8 bytes)
    //                    bcnt: const = 0x0 (8 bytes)
    //                  }
    //                  matches: array[ipt_raw_matches] {
    //                  }
    //                }
    //                target: union ipt_raw_targets {
    //                  common: union ipt_targets {
    //                    CLUSTERIP: xt_target_t["CLUSTERIP",
    //                    ipt_clusterip_tgt_info, 0] {
    //                      target_size: len = 0x60 (2 bytes)
    //                      name: buffer: {43 4c 55 53 54 45 52 49 50 00 00 00
    //                      00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00}
    //                      (length 0x1d) revision: const = 0x0 (1 bytes) data:
    //                      ipt_clusterip_tgt_info {
    //                        flags: int32 = 0x0 (4 bytes)
    //                        clustermac: union mac_addr {
    //                          random: buffer: {d3 2b 3c 31 1e 5c} (length 0x6)
    //                        }
    //                        num_total_nodes: int16 = 0xfe01 (2 bytes)
    //                        num_local_nodes: int16 = 0x4 (2 bytes)
    //                        local_nodes: array[int16] {
    //                          int16 = 0x2f (2 bytes)
    //                          int16 = 0xb (2 bytes)
    //                          int16 = 0x1a (2 bytes)
    //                          int16 = 0x0 (2 bytes)
    //                          int16 = 0x14 (2 bytes)
    //                          int16 = 0x22 (2 bytes)
    //                          int16 = 0x4 (2 bytes)
    //                          int16 = 0x39 (2 bytes)
    //                          int16 = 0x2 (2 bytes)
    //                          int16 = 0x29 (2 bytes)
    //                          int16 = 0x1b (2 bytes)
    //                          int16 = 0x16 (2 bytes)
    //                          int16 = 0x3 (2 bytes)
    //                          int16 = 0x2c (2 bytes)
    //                          int16 = 0x0 (2 bytes)
    //                          int16 = 0x2 (2 bytes)
    //                        }
    //                        pad = 0x0 (2 bytes)
    //                        hash_mode: ipt_clusterip_hash_mode = 0x1 (4 bytes)
    //                        hash_initval: int32 = 0x9 (4 bytes)
    //                        config: intptr = 0x2 (8 bytes)
    //                      }
    //                    }
    //                  }
    //                }
    //              }
    //              ipt_entry[ipt_raw_matches, ipt_raw_targets] {
    //                matches: ipt_entry_matches[ipt_raw_matches] {
    //                  ip: union ipt_ip_or_uncond {
    //                    ip: ipt_ip {
    //                      src: union ipv4_addr {
    //                        remote: ipv4_addr_t[const[187, int8]] {
    //                          a0: const = 0xac (1 bytes)
    //                          a1: const = 0x14 (1 bytes)
    //                          a2: const = 0x14 (1 bytes)
    //                          a3: const = 0xbb (1 bytes)
    //                        }
    //                      }
    //                      dst: union ipv4_addr {
    //                        broadcast: const = 0xffffffff (4 bytes)
    //                      }
    //                      smsk: ipv4_addr_mask_vals = 0xff (4 bytes)
    //                      dmsk: ipv4_addr_mask_vals = 0xff000000 (4 bytes)
    //                      iniface: buffer: {76 65 74 68 31 5f 74 6f 5f 74 65
    //                      61 6d 00 00 00} (length 0x10) outiface: buffer: {70
    //                      69 6d 72 65 67 00 00 00 00 00 00 00 00 00 00}
    //                      (length 0x10) iniface_mask: devname_mask {
    //                        lo: devname_mask_values = 0xff (1 bytes)
    //                        pad = 0x0 (15 bytes)
    //                      }
    //                      outiface_mask: devname_mask {
    //                        lo: devname_mask_values = 0xff (1 bytes)
    //                        pad = 0x0 (15 bytes)
    //                      }
    //                      proto: ipv4_types = 0x88 (2 bytes)
    //                      flags: ipt_ip_flags = 0x2 (1 bytes)
    //                      invflags: ipt_ip_invflags = 0x8 (1 bytes)
    //                    }
    //                  }
    //                  nfcache: const = 0x0 (4 bytes)
    //                  target_offset: len = 0xc0 (2 bytes)
    //                  next_offset: len = 0x128 (2 bytes)
    //                  comefrom: const = 0x0 (4 bytes)
    //                  counters: xt_counters {
    //                    pcnt: const = 0x0 (8 bytes)
    //                    bcnt: const = 0x0 (8 bytes)
    //                  }
    //                  matches: array[ipt_raw_matches] {
    //                    union ipt_raw_matches {
    //                      common: union ipt_matches {
    //                        inet: union xt_inet_matches {
    //                          socket1: xt_entry_match_t["socket",
    //                          flags[xt_socket_flags_v1, int8], 1] {
    //                            header: xt_entry_match["socket", 1] {
    //                              match_size: len = 0x28 (2 bytes)
    //                              name: buffer: {73 6f 63 6b 65 74 00 00 00 00
    //                              00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    //                              00 00 00 00} (length 0x1d) revision: const =
    //                              0x1 (1 bytes)
    //                            }
    //                            data: xt_socket_flags_v1 = 0x1 (1 bytes)
    //                            pad = 0x0 (7 bytes)
    //                          }
    //                        }
    //                      }
    //                    }
    //                    union ipt_raw_matches {
    //                      inet: union xt_inet_raw_matches {
    //                        rpfilter: xt_entry_match_t["rpfilter",
    //                        xt_rpfilter_info, 0] {
    //                          header: xt_entry_match["rpfilter", 0] {
    //                            match_size: len = 0x28 (2 bytes)
    //                            name: buffer: {72 70 66 69 6c 74 65 72 00 00
    //                            00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    //                            00 00 00 00} (length 0x1d) revision: const =
    //                            0x0 (1 bytes)
    //                          }
    //                          data: xt_rpfilter_info {
    //                            flags: xt_rpfilter_flags = 0x9 (1 bytes)
    //                          }
    //                          pad = 0x0 (7 bytes)
    //                        }
    //                      }
    //                    }
    //                  }
    //                }
    //                target: union ipt_raw_targets {
    //                  unspec: union xt_unspec_raw_targets {
    //                    CT1: xt_target_t["CT", xt_ct_target_info_v1, 1] {
    //                      target_size: len = 0x68 (2 bytes)
    //                      name: buffer: {43 54 00 00 00 00 00 00 00 00 00 00
    //                      00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00}
    //                      (length 0x1d) revision: const = 0x1 (1 bytes) data:
    //                      xt_ct_target_info_v1 {
    //                        flags: xt_ct_flags = 0x0 (2 bytes)
    //                        zone: int16 = 0x7 (2 bytes)
    //                        ct_events: int32 = 0xfffffff9 (4 bytes)
    //                        exp_events: int32 = 0x9 (4 bytes)
    //                        helper: buffer: {73 79 7a 31 00 00 00 00 00 00 00
    //                        00 00 00 00 00} (length 0x10) timeout: buffer: {73
    //                        79 7a 30 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    //                        00 00 00 00 00 00 00 00 00 00 00 00 00 00} (length
    //                        0x20) pad = 0x0 (4 bytes) ct: align64[intptr] {
    //                          v: intptr = 0xfc8 (8 bytes)
    //                        }
    //                      }
    //                    }
    //                  }
    //                }
    //              }
    //            }
    //            underflow: ipt_entry_underflow {
    //              matches: ipt_entry_underflow_matches {
    //                ip: buffer: {00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    //                00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    //                00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    //                00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    //                00 00 00 00 00 00 00 00 00 00 00 00} (length 0x54)
    //                nfcache: const = 0x0 (4 bytes)
    //                target_offset: len = 0x70 (2 bytes)
    //                next_offset: len = 0x98 (2 bytes)
    //                comefrom: const = 0x0 (4 bytes)
    //                counters: xt_counters {
    //                  pcnt: const = 0x0 (8 bytes)
    //                  bcnt: const = 0x0 (8 bytes)
    //                }
    //              }
    //              target: xt_target_t["", const[NF_ACCEPT_VERDICT, int32], 0]
    //              {
    //                target_size: len = 0x28 (2 bytes)
    //                name: buffer: {00 00 00 00 00 00 00 00 00 00 00 00 00 00
    //                00 00 00 00 00 00 00 00 00 00 00 00 00 00 00} (length
    //                0x1d) revision: const = 0x0 (1 bytes) data: const =
    //                0xfffffffe (4 bytes) pad = 0x0 (4 bytes)
    //              }
    //            }
    //          }
    //        }
    //      }
    //    }
    //    len: len = 0x2f0 (8 bytes)
    //  ]
    NONFAILING(
        memcpy((void*)0x200000000780,
               "raw\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
               "\000\000\000\000\000\000\000\000\000\000\000\000\000\000",
               32));
    NONFAILING(*(uint32_t*)0x2000000007a0 = 9);
    NONFAILING(*(uint32_t*)0x2000000007a4 = 3);
    NONFAILING(*(uint32_t*)0x2000000007a8 = 0x290);
    NONFAILING(*(uint32_t*)0x2000000007ac = 0xd0);
    NONFAILING(*(uint32_t*)0x2000000007b0 = -1);
    NONFAILING(*(uint32_t*)0x2000000007b4 = -1);
    NONFAILING(*(uint32_t*)0x2000000007b8 = 0);
    NONFAILING(*(uint32_t*)0x2000000007bc = -1);
    NONFAILING(*(uint32_t*)0x2000000007c0 = 0x1f8);
    NONFAILING(*(uint32_t*)0x2000000007c4 = -1);
    NONFAILING(*(uint32_t*)0x2000000007c8 = -1);
    NONFAILING(*(uint32_t*)0x2000000007cc = 0x1f8);
    NONFAILING(*(uint32_t*)0x2000000007d0 = -1);
    NONFAILING(*(uint32_t*)0x2000000007d4 = 3);
    NONFAILING(*(uint64_t*)0x2000000007d8 = 0);
    NONFAILING(memset((void*)0x2000000007e0, 0, 84));
    NONFAILING(*(uint32_t*)0x200000000834 = 0);
    NONFAILING(*(uint16_t*)0x200000000838 = 0x70);
    NONFAILING(*(uint16_t*)0x20000000083a = 0xd0);
    NONFAILING(*(uint32_t*)0x20000000083c = 0);
    NONFAILING(*(uint64_t*)0x200000000840 = 0);
    NONFAILING(*(uint64_t*)0x200000000848 = 0);
    NONFAILING(*(uint16_t*)0x200000000850 = 0x60);
    NONFAILING(memcpy((void*)0x200000000852,
                      "CLUSTERIP\000\000\000\000\000\000\000\000\000\000\000"
                      "\000\000\000\000\000\000\000\000\000",
                      29));
    NONFAILING(*(uint8_t*)0x20000000086f = 0);
    NONFAILING(*(uint32_t*)0x200000000870 = 0);
    NONFAILING(memcpy((void*)0x200000000874, "\xd3\x2b\x3c\x31\x1e\x5c", 6));
    NONFAILING(*(uint16_t*)0x20000000087a = 0xfe01);
    NONFAILING(*(uint16_t*)0x20000000087c = 4);
    NONFAILING(*(uint16_t*)0x20000000087e = 0x2f);
    NONFAILING(*(uint16_t*)0x200000000880 = 0xb);
    NONFAILING(*(uint16_t*)0x200000000882 = 0x1a);
    NONFAILING(*(uint16_t*)0x200000000884 = 0);
    NONFAILING(*(uint16_t*)0x200000000886 = 0x14);
    NONFAILING(*(uint16_t*)0x200000000888 = 0x22);
    NONFAILING(*(uint16_t*)0x20000000088a = 4);
    NONFAILING(*(uint16_t*)0x20000000088c = 0x39);
    NONFAILING(*(uint16_t*)0x20000000088e = 2);
    NONFAILING(*(uint16_t*)0x200000000890 = 0x29);
    NONFAILING(*(uint16_t*)0x200000000892 = 0x1b);
    NONFAILING(*(uint16_t*)0x200000000894 = 0x16);
    NONFAILING(*(uint16_t*)0x200000000896 = 3);
    NONFAILING(*(uint16_t*)0x200000000898 = 0x2c);
    NONFAILING(*(uint16_t*)0x20000000089a = 0);
    NONFAILING(*(uint16_t*)0x20000000089c = 2);
    NONFAILING(*(uint32_t*)0x2000000008a0 = 1);
    NONFAILING(*(uint32_t*)0x2000000008a4 = 9);
    NONFAILING(*(uint64_t*)0x2000000008a8 = 2);
    NONFAILING(*(uint8_t*)0x2000000008b0 = 0xac);
    NONFAILING(*(uint8_t*)0x2000000008b1 = 0x14);
    NONFAILING(*(uint8_t*)0x2000000008b2 = 0x14);
    NONFAILING(*(uint8_t*)0x2000000008b3 = 0xbb);
    NONFAILING(*(uint32_t*)0x2000000008b4 = htobe32(-1));
    NONFAILING(*(uint32_t*)0x2000000008b8 = htobe32(0xff));
    NONFAILING(*(uint32_t*)0x2000000008bc = htobe32(0xff000000));
    NONFAILING(memcpy((void*)0x2000000008c0, "veth1_to_team\000\000\000", 16));
    NONFAILING(memcpy((void*)0x2000000008d0,
                      "pimreg\000\000\000\000\000\000\000\000\000\000", 16));
    NONFAILING(*(uint8_t*)0x2000000008e0 = -1);
    NONFAILING(*(uint8_t*)0x2000000008f0 = -1);
    NONFAILING(*(uint16_t*)0x200000000900 = 0x88);
    NONFAILING(*(uint8_t*)0x200000000902 = 2);
    NONFAILING(*(uint8_t*)0x200000000903 = 8);
    NONFAILING(*(uint32_t*)0x200000000904 = 0);
    NONFAILING(*(uint16_t*)0x200000000908 = 0xc0);
    NONFAILING(*(uint16_t*)0x20000000090a = 0x128);
    NONFAILING(*(uint32_t*)0x20000000090c = 0);
    NONFAILING(*(uint64_t*)0x200000000910 = 0);
    NONFAILING(*(uint64_t*)0x200000000918 = 0);
    NONFAILING(*(uint16_t*)0x200000000920 = 0x28);
    NONFAILING(memcpy((void*)0x200000000922,
                      "socket\000\000\000\000\000\000\000\000\000\000\000\000"
                      "\000\000\000\000\000\000\000\000\000\000\000",
                      29));
    NONFAILING(*(uint8_t*)0x20000000093f = 1);
    NONFAILING(*(uint8_t*)0x200000000940 = 1);
    NONFAILING(*(uint16_t*)0x200000000948 = 0x28);
    NONFAILING(memcpy((void*)0x20000000094a,
                      "rpfilter\000\000\000\000\000\000\000\000\000\000\000\000"
                      "\000\000\000\000\000\000\000\000\000",
                      29));
    NONFAILING(*(uint8_t*)0x200000000967 = 0);
    NONFAILING(*(uint8_t*)0x200000000968 = 9);
    NONFAILING(*(uint16_t*)0x200000000970 = 0x68);
    NONFAILING(
        memcpy((void*)0x200000000972,
               "CT\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
               "\000\000\000\000\000\000\000\000\000\000\000\000",
               29));
    NONFAILING(*(uint8_t*)0x20000000098f = 1);
    NONFAILING(*(uint16_t*)0x200000000990 = 0);
    NONFAILING(*(uint16_t*)0x200000000992 = 7);
    NONFAILING(*(uint32_t*)0x200000000994 = 0xfffffff9);
    NONFAILING(*(uint32_t*)0x200000000998 = 9);
    NONFAILING(memcpy((void*)0x20000000099c,
                      "syz1\000\000\000\000\000\000\000\000\000\000\000\000",
                      16));
    NONFAILING(
        memcpy((void*)0x2000000009ac,
               "syz0\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
               "\000\000\000\000\000\000\000\000\000\000\000\000\000\000",
               32));
    NONFAILING(*(uint64_t*)0x2000000009d0 = 0xfc8);
    NONFAILING(memset((void*)0x2000000009d8, 0, 84));
    NONFAILING(*(uint32_t*)0x200000000a2c = 0);
    NONFAILING(*(uint16_t*)0x200000000a30 = 0x70);
    NONFAILING(*(uint16_t*)0x200000000a32 = 0x98);
    NONFAILING(*(uint32_t*)0x200000000a34 = 0);
    NONFAILING(*(uint64_t*)0x200000000a38 = 0);
    NONFAILING(*(uint64_t*)0x200000000a40 = 0);
    NONFAILING(*(uint16_t*)0x200000000a48 = 0x28);
    NONFAILING(memset((void*)0x200000000a4a, 0, 29));
    NONFAILING(*(uint8_t*)0x200000000a67 = 0);
    NONFAILING(*(uint32_t*)0x200000000a68 = 0xfffffffe);
    syscall(__NR_setsockopt, /*fd=*/(intptr_t)-1, /*level=*/0, /*opt=*/0x40,
            /*val=*/0x200000000780ul, /*len=*/0x2f0ul);
    break;
  case 22:
    //  shutdown arguments: [
    //    fd: sock (resource)
    //    how: shutdown_flags = 0x1 (8 bytes)
    //  ]
    syscall(__NR_shutdown, /*fd=*/(intptr_t)-1, /*how=SHUT_WR*/ 1ul);
    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;
  install_segv_handler();
  for (procid = 0; procid < 4; procid++) {
    if (fork() == 0) {
      loop();
    }
  }
  sleep(1000000);
  return 0;
}