// https://syzkaller.appspot.com/bug?id=782fb02af7e2d4b885b23e00671798db3627e185
// 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/ioctl.h>
#include <sys/mman.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_io_uring_setup
#define __NR_io_uring_setup 425
#endif

static unsigned long long procid;

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

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

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

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

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

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

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

static 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;
}

const int kInitNetNsFd = 201;

#define SIZEOF_IO_URING_SQE 64
#define SIZEOF_IO_URING_CQE 16
#define SQ_HEAD_OFFSET 0
#define SQ_TAIL_OFFSET 64
#define SQ_RING_MASK_OFFSET 256
#define SQ_RING_ENTRIES_OFFSET 264
#define SQ_FLAGS_OFFSET 276
#define SQ_DROPPED_OFFSET 272
#define CQ_HEAD_OFFSET 128
#define CQ_TAIL_OFFSET 192
#define CQ_RING_MASK_OFFSET 260
#define CQ_RING_ENTRIES_OFFSET 268
#define CQ_RING_OVERFLOW_OFFSET 284
#define CQ_FLAGS_OFFSET 280
#define CQ_CQES_OFFSET 320

struct io_sqring_offsets {
  uint32_t head;
  uint32_t tail;
  uint32_t ring_mask;
  uint32_t ring_entries;
  uint32_t flags;
  uint32_t dropped;
  uint32_t array;
  uint32_t resv1;
  uint64_t resv2;
};

struct io_cqring_offsets {
  uint32_t head;
  uint32_t tail;
  uint32_t ring_mask;
  uint32_t ring_entries;
  uint32_t overflow;
  uint32_t cqes;
  uint64_t resv[2];
};

struct io_uring_params {
  uint32_t sq_entries;
  uint32_t cq_entries;
  uint32_t flags;
  uint32_t sq_thread_cpu;
  uint32_t sq_thread_idle;
  uint32_t features;
  uint32_t resv[4];
  struct io_sqring_offsets sq_off;
  struct io_cqring_offsets cq_off;
};

#define IORING_OFF_SQ_RING 0
#define IORING_OFF_SQES 0x10000000ULL
#define IORING_SETUP_SQE128 (1U << 10)
#define IORING_SETUP_CQE32 (1U << 11)

static long syz_io_uring_setup(volatile long a0, volatile long a1,
                               volatile long a2, volatile long a3)
{
  uint32_t entries = (uint32_t)a0;
  struct io_uring_params* setup_params = (struct io_uring_params*)a1;
  void** ring_ptr_out = (void**)a2;
  void** sqes_ptr_out = (void**)a3;
  setup_params->flags &= ~(IORING_SETUP_CQE32 | IORING_SETUP_SQE128);
  uint32_t fd_io_uring = syscall(__NR_io_uring_setup, entries, setup_params);
  uint32_t sq_ring_sz =
      setup_params->sq_off.array + setup_params->sq_entries * sizeof(uint32_t);
  uint32_t cq_ring_sz = setup_params->cq_off.cqes +
                        setup_params->cq_entries * SIZEOF_IO_URING_CQE;
  uint32_t ring_sz = sq_ring_sz > cq_ring_sz ? sq_ring_sz : cq_ring_sz;
  *ring_ptr_out =
      mmap(0, ring_sz, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_POPULATE,
           fd_io_uring, IORING_OFF_SQ_RING);
  uint32_t sqes_sz = setup_params->sq_entries * SIZEOF_IO_URING_SQE;
  *sqes_ptr_out = mmap(0, sqes_sz, PROT_READ | PROT_WRITE,
                       MAP_SHARED | MAP_POPULATE, fd_io_uring, IORING_OFF_SQES);
  uint32_t* array =
      (uint32_t*)((uintptr_t)*ring_ptr_out + setup_params->sq_off.array);
  for (uint32_t index = 0; index < entries; index++)
    array[index] = index;
  return fd_io_uring;
}

static long syz_init_net_socket(volatile long domain, volatile long type,
                                volatile long proto)
{
  return syscall(__NR_socket, domain, type, proto);
}

#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")) {
  }
}

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 < 10; 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++) {
    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[4] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff,
                 0xffffffffffffffff};

void execute_call(int call)
{
  intptr_t res = 0;
  switch (call) {
  case 0:
    //  io_uring_setup arguments: [
    //    entries: int32 = 0x332 (4 bytes)
    //    params: ptr[inout, io_uring_params] {
    //      io_uring_params {
    //        sq_entries: int32 = 0x0 (4 bytes)
    //        cq_entries: int32 = 0xfffffffe (4 bytes)
    //        flags: io_uring_setup_flags = 0x10 (4 bytes)
    //        sq_thread_cpu: int32 = 0x0 (4 bytes)
    //        sq_thread_idle: int32 = 0x0 (4 bytes)
    //        features: int32 = 0x0 (4 bytes)
    //        wq_fd: fd_io_uring (resource)
    //        resv: buffer: {00 00 00 00 00 00 00 00 00 00 00 00} (length 0xc)
    //        sq_off: array[int32] {
    //          int32 = 0x0 (4 bytes)
    //          int32 = 0x0 (4 bytes)
    //          int32 = 0x0 (4 bytes)
    //          int32 = 0x0 (4 bytes)
    //          int32 = 0x0 (4 bytes)
    //          int32 = 0x0 (4 bytes)
    //          int32 = 0x0 (4 bytes)
    //          int32 = 0x0 (4 bytes)
    //          int32 = 0x0 (4 bytes)
    //          int32 = 0x0 (4 bytes)
    //        }
    //        cq_off: array[int32] {
    //          int32 = 0x0 (4 bytes)
    //          int32 = 0x0 (4 bytes)
    //          int32 = 0x0 (4 bytes)
    //          int32 = 0x0 (4 bytes)
    //          int32 = 0x0 (4 bytes)
    //          int32 = 0x0 (4 bytes)
    //          int32 = 0x0 (4 bytes)
    //          int32 = 0x0 (4 bytes)
    //          int32 = 0x0 (4 bytes)
    //          int32 = 0x0 (4 bytes)
    //        }
    //      }
    //    }
    //  ]
    //  returns fd_io_uring
    NONFAILING(*(uint32_t*)0x200000000084 = 0xfffffffe);
    NONFAILING(*(uint32_t*)0x200000000088 = 0x10);
    NONFAILING(*(uint32_t*)0x20000000008c = 0);
    NONFAILING(*(uint32_t*)0x200000000090 = 0);
    NONFAILING(*(uint32_t*)0x200000000098 = -1);
    NONFAILING(memset((void*)0x20000000009c, 0, 12));
    syscall(__NR_io_uring_setup, /*entries=*/0x332,
            /*params=*/0x200000000080ul);
    break;
  case 1:
    //  syz_io_uring_setup arguments: [
    //    entries: int32 = 0x88f (4 bytes)
    //    params: ptr[inout, io_uring_params] {
    //      io_uring_params {
    //        sq_entries: int32 = 0x0 (4 bytes)
    //        cq_entries: int32 = 0xfda9 (4 bytes)
    //        flags: io_uring_setup_flags = 0x800 (4 bytes)
    //        sq_thread_cpu: int32 = 0xffffffff (4 bytes)
    //        sq_thread_idle: int32 = 0xbfe00000 (4 bytes)
    //        features: int32 = 0x0 (4 bytes)
    //        wq_fd: fd_io_uring (resource)
    //        resv: buffer: {00 00 00 00 00 00 00 00 00 00 00 00} (length 0xc)
    //        sq_off: array[int32] {
    //          int32 = 0x0 (4 bytes)
    //          int32 = 0x0 (4 bytes)
    //          int32 = 0x0 (4 bytes)
    //          int32 = 0x0 (4 bytes)
    //          int32 = 0x0 (4 bytes)
    //          int32 = 0x0 (4 bytes)
    //          int32 = 0x0 (4 bytes)
    //          int32 = 0x0 (4 bytes)
    //          int32 = 0x0 (4 bytes)
    //          int32 = 0x0 (4 bytes)
    //        }
    //        cq_off: array[int32] {
    //          int32 = 0x0 (4 bytes)
    //          int32 = 0x0 (4 bytes)
    //          int32 = 0x0 (4 bytes)
    //          int32 = 0x0 (4 bytes)
    //          int32 = 0x0 (4 bytes)
    //          int32 = 0x0 (4 bytes)
    //          int32 = 0x0 (4 bytes)
    //          int32 = 0x0 (4 bytes)
    //          int32 = 0x0 (4 bytes)
    //          int32 = 0x0 (4 bytes)
    //        }
    //      }
    //    }
    //    ring_ptr: nil
    //    sqes_ptr: nil
    //  ]
    //  returns fd_io_uring
    NONFAILING(*(uint32_t*)0x200000000144 = 0xfda9);
    NONFAILING(*(uint32_t*)0x200000000148 = 0x800);
    NONFAILING(*(uint32_t*)0x20000000014c = -1);
    NONFAILING(*(uint32_t*)0x200000000150 = 0xbfe00000);
    NONFAILING(*(uint32_t*)0x200000000158 = -1);
    NONFAILING(memset((void*)0x20000000015c, 0, 12));
    NONFAILING(syz_io_uring_setup(/*entries=*/0x88f, /*params=*/0x200000000140,
                                  /*ring_ptr=*/0, /*sqes_ptr=*/0));
    break;
  case 2:
    //  syz_init_net_socket$nl_generic arguments: [
    //    domain: const = 0x10 (8 bytes)
    //    type: const = 0x3 (8 bytes)
    //    proto: const = 0x10 (8 bytes)
    //  ]
    //  returns sock_nl_generic_init
    res = -1;
    NONFAILING(
        res = syz_init_net_socket(/*domain=*/0x10, /*type=*/3, /*proto=*/0x10));
    if (res != -1)
      r[0] = res;
    break;
  case 3:
    //  socketpair$unix arguments: [
    //    domain: const = 0x1 (8 bytes)
    //    type: unix_socket_type = 0x2 (8 bytes)
    //    proto: const = 0x0 (4 bytes)
    //    fds: ptr[out, unix_pair] {
    //      unix_pair {
    //        fd0: sock_unix (resource)
    //        fd1: sock_unix (resource)
    //      }
    //    }
    //  ]
    res = syscall(__NR_socketpair, /*domain=*/1ul, /*type=SOCK_DGRAM*/ 2ul,
                  /*proto=*/0, /*fds=*/0x200000000040ul);
    if (res != -1) {
      NONFAILING(r[1] = *(uint32_t*)0x200000000040);
      NONFAILING(r[2] = *(uint32_t*)0x200000000044);
    }
    break;
  case 4:
    //  pipe2$9p arguments: [
    //    pipefd: ptr[out, pipe_9p] {
    //      pipe_9p {
    //        rfd: rfd9p (resource)
    //        wfd: wfd9p (resource)
    //      }
    //    }
    //    flags: pipe_flags = 0x0 (8 bytes)
    //  ]
    syscall(__NR_pipe2, /*pipefd=*/0x200000000080ul, /*flags=*/0ul);
    break;
  case 5:
    //  openat arguments: [
    //    fd: fd_dir (resource)
    //    file: ptr[in, buffer] {
    //      buffer: {2e 2f 66 69 6c 65 31 00} (length 0x8)
    //    }
    //    flags: open_flags = 0x121042 (4 bytes)
    //    mode: open_mode = 0x18 (2 bytes)
    //  ]
    //  returns fd
    NONFAILING(memcpy((void*)0x200000000040, "./file1\000", 8));
    syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x200000000040ul,
            /*flags=O_SYNC|O_NOFOLLOW|O_CREAT|O_RDWR*/ 0x121042,
            /*mode=S_IXGRP|S_IWGRP*/ 0x18);
    break;
  case 6:
    //  sendmsg$inet arguments: [
    //    fd: sock (resource)
    //    msg: ptr[in, msghdr_inet] {
    //      msghdr_inet {
    //        msg_name: nil
    //        msg_namelen: len = 0x0 (4 bytes)
    //        pad = 0x0 (4 bytes)
    //        msg_iov: nil
    //        msg_iovlen: len = 0x0 (8 bytes)
    //        msg_control: ptr[inout, array[ANYUNION]] {
    //          array[ANYUNION] {
    //            union ANYUNION {
    //              ANYBLOB: buffer: {28 01 00 00 00 00 00 00 01 00 00 00 01}
    //              (length 0xd)
    //            }
    //          }
    //        }
    //        msg_controllen: bytesize = 0x128 (8 bytes)
    //        msg_flags: const = 0x0 (4 bytes)
    //        pad = 0x0 (4 bytes)
    //      }
    //    }
    //    f: send_flags = 0x0 (8 bytes)
    //  ]
    NONFAILING(*(uint64_t*)0x200000001b00 = 0);
    NONFAILING(*(uint32_t*)0x200000001b08 = 0);
    NONFAILING(*(uint64_t*)0x200000001b10 = 0);
    NONFAILING(*(uint64_t*)0x200000001b18 = 0);
    NONFAILING(*(uint64_t*)0x200000001b20 = 0x200000001d80);
    NONFAILING(memcpy((void*)0x200000001d80,
                      "\x28\x01\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x01",
                      13));
    NONFAILING(*(uint64_t*)0x200000001b28 = 0x128);
    NONFAILING(*(uint32_t*)0x200000001b30 = 0);
    syscall(__NR_sendmsg, /*fd=*/r[2], /*msg=*/0x200000001b00ul, /*f=*/0ul);
    break;
  case 7:
    //  socket$nl_route arguments: [
    //    domain: const = 0x10 (8 bytes)
    //    type: const = 0x3 (8 bytes)
    //    proto: const = 0x0 (4 bytes)
    //  ]
    //  returns sock_nl_route
    syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/0);
    break;
  case 8:
    //  recvmsg$unix arguments: [
    //    fd: sock_unix (resource)
    //    msg: ptr[inout, recv_msghdr_un] {
    //      recv_msghdr_un {
    //        addr: nil
    //        addrlen: len = 0xfffffffffffffd8c (4 bytes)
    //        pad = 0x0 (4 bytes)
    //        vec: nil
    //        vlen: len = 0x0 (8 bytes)
    //        ctrl: ptr[out, array[cmsghdr_un]] {
    //          array[cmsghdr_un] {
    //            union cmsghdr_un {
    //              cred: cmsghdr_t[SOL_SOCKET, SCM_CREDENTIALS, cmsg_un_cred] {
    //                unaligned: cmsghdr_unaligned[SOL_SOCKET, SCM_CREDENTIALS,
    //                cmsg_un_cred] {
    //                  cmsg_len: len = 0x1c (8 bytes)
    //                  cmsg_level: const = 0x1 (4 bytes)
    //                  cmsg_type: const = 0x2 (4 bytes)
    //                  data: cmsg_un_cred {
    //                    pid: pid (resource)
    //                    uid: uid (resource)
    //                    gid: gid (resource)
    //                  }
    //                }
    //                pad = 0x0 (4 bytes)
    //              }
    //            }
    //            union cmsghdr_un {
    //              cred: cmsghdr_t[SOL_SOCKET, SCM_CREDENTIALS, cmsg_un_cred] {
    //                unaligned: cmsghdr_unaligned[SOL_SOCKET, SCM_CREDENTIALS,
    //                cmsg_un_cred] {
    //                  cmsg_len: len = 0x1c (8 bytes)
    //                  cmsg_level: const = 0x1 (4 bytes)
    //                  cmsg_type: const = 0x2 (4 bytes)
    //                  data: cmsg_un_cred {
    //                    pid: pid (resource)
    //                    uid: uid (resource)
    //                    gid: gid (resource)
    //                  }
    //                }
    //                pad = 0x0 (4 bytes)
    //              }
    //            }
    //            union cmsghdr_un {
    //              cred: cmsghdr_t[SOL_SOCKET, SCM_CREDENTIALS, cmsg_un_cred] {
    //                unaligned: cmsghdr_unaligned[SOL_SOCKET, SCM_CREDENTIALS,
    //                cmsg_un_cred] {
    //                  cmsg_len: len = 0x1c (8 bytes)
    //                  cmsg_level: const = 0x1 (4 bytes)
    //                  cmsg_type: const = 0x2 (4 bytes)
    //                  data: cmsg_un_cred {
    //                    pid: pid (resource)
    //                    uid: uid (resource)
    //                    gid: gid (resource)
    //                  }
    //                }
    //                pad = 0x0 (4 bytes)
    //              }
    //            }
    //            union cmsghdr_un {
    //              rights: cmsghdr_t[SOL_SOCKET, SCM_RIGHTS, array[fd]] {
    //                unaligned: cmsghdr_unaligned[SOL_SOCKET, SCM_RIGHTS,
    //                array[fd]] {
    //                  cmsg_len: len = 0x18 (8 bytes)
    //                  cmsg_level: const = 0x1 (4 bytes)
    //                  cmsg_type: const = 0x1 (4 bytes)
    //                  data: array[fd] {
    //                    fd (resource)
    //                    fd (resource)
    //                  }
    //                }
    //              }
    //            }
    //          }
    //        }
    //        ctrllen: bytesize = 0x78 (8 bytes)
    //        f: const = 0x0 (4 bytes)
    //        pad = 0x0 (4 bytes)
    //      }
    //    }
    //    f: recv_flags = 0x0 (8 bytes)
    //  ]
    NONFAILING(*(uint64_t*)0x200000000000 = 0);
    NONFAILING(*(uint32_t*)0x200000000008 = 0xfffffd8c);
    NONFAILING(*(uint64_t*)0x200000000010 = 0);
    NONFAILING(*(uint64_t*)0x200000000018 = 0);
    NONFAILING(*(uint64_t*)0x200000000020 = 0x200000000f40);
    NONFAILING(*(uint64_t*)0x200000000028 = 0x78);
    NONFAILING(*(uint32_t*)0x200000000030 = 0);
    res = syscall(__NR_recvmsg, /*fd=*/r[1], /*msg=*/0x200000000000ul,
                  /*f=*/0ul, 0);
    if (res != -1)
      NONFAILING(r[3] = *(uint32_t*)0x200000000fb4);
    break;
  case 9:
    //  sendmsg$NFC_CMD_DEV_UP arguments: [
    //    fd: sock_nl_generic_init (resource)
    //    msg: ptr[in, msghdr_netlink[netlink_msg_t[genl_nfc_family_id,
    //    genlmsghdr_t[NFC_CMD_DEV_UP], nfc_genl_policy_dev_index]]] {
    //      msghdr_netlink[netlink_msg_t[genl_nfc_family_id,
    //      genlmsghdr_t[NFC_CMD_DEV_UP], nfc_genl_policy_dev_index]] {
    //        addr: nil
    //        addrlen: len = 0x0 (4 bytes)
    //        pad = 0x0 (4 bytes)
    //        vec: ptr[in, iovec[in, netlink_msg_t[genl_nfc_family_id,
    //        genlmsghdr_t[NFC_CMD_DEV_UP], nfc_genl_policy_dev_index]]] {
    //          iovec[in, netlink_msg_t[genl_nfc_family_id,
    //          genlmsghdr_t[NFC_CMD_DEV_UP], nfc_genl_policy_dev_index]] {
    //            addr: ptr[inout, array[ANYUNION]] {
    //              array[ANYUNION] {
    //                union ANYUNION {
    //                  ANYBLOB: buffer: {1c 00 00 00} (length 0x4)
    //                }
    //                union ANYUNION {
    //                  ANYRES16: ANYRES16 (resource)
    //                }
    //                union ANYUNION {
    //                  ANYBLOB: buffer: {01 00 28 bd 70 00 07 00 00 00 02 00 00
    //                  00 08 00 01} (length 0x11)
    //                }
    //              }
    //            }
    //            len: len = 0x1c (8 bytes)
    //          }
    //        }
    //        vlen: const = 0x1 (8 bytes)
    //        ctrl: const = 0x0 (8 bytes)
    //        ctrllen: const = 0x0 (8 bytes)
    //        f: send_flags = 0x40c89 (4 bytes)
    //        pad = 0x0 (4 bytes)
    //      }
    //    }
    //    f: send_flags = 0x8004 (8 bytes)
    //  ]
    NONFAILING(*(uint64_t*)0x200000000180 = 0);
    NONFAILING(*(uint32_t*)0x200000000188 = 0);
    NONFAILING(*(uint64_t*)0x200000000190 = 0x200000000280);
    NONFAILING(*(uint64_t*)0x200000000280 = 0x200000000140);
    NONFAILING(memcpy((void*)0x200000000140, "\x1c\x00\x00\x00", 4));
    NONFAILING(*(uint16_t*)0x200000000144 = r[3]);
    NONFAILING(memcpy(
        (void*)0x200000000146,
        "\x01\x00\x28\xbd\x70\x00\x07\x00\x00\x00\x02\x00\x00\x00\x08\x00\x01",
        17));
    NONFAILING(*(uint64_t*)0x200000000288 = 0x1c);
    NONFAILING(*(uint64_t*)0x200000000198 = 1);
    NONFAILING(*(uint64_t*)0x2000000001a0 = 0);
    NONFAILING(*(uint64_t*)0x2000000001a8 = 0);
    NONFAILING(*(uint32_t*)0x2000000001b0 = 0x40c89);
    syscall(__NR_sendmsg, /*fd=*/r[0], /*msg=*/0x200000000180ul,
            /*f=MSG_MORE|MSG_DONTROUTE*/ 0x8004ul);
    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 < 5; procid++) {
    if (fork() == 0) {
      use_temporary_dir();
      loop();
    }
  }
  sleep(1000000);
  return 0;
}