// https://syzkaller.appspot.com/bug?id=f34aaaca22b6590b45be3c10114cf04f402cfdc0
// 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 <stddef.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>
#include <linux/loop.h>

#ifndef __NR_memfd_create
#define __NR_memfd_create 319
#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;
}

//% This code is derived from puff.{c,h}, found in the zlib development. The
//% original files come with the following copyright notice:

//% Copyright (C) 2002-2013 Mark Adler, all rights reserved
//% version 2.3, 21 Jan 2013
//% This software is provided 'as-is', without any express or implied
//% warranty.  In no event will the author be held liable for any damages
//% arising from the use of this software.
//% Permission is granted to anyone to use this software for any purpose,
//% including commercial applications, and to alter it and redistribute it
//% freely, subject to the following restrictions:
//% 1. The origin of this software must not be misrepresented; you must not
//%    claim that you wrote the original software. If you use this software
//%    in a product, an acknowledgment in the product documentation would be
//%    appreciated but is not required.
//% 2. Altered source versions must be plainly marked as such, and must not be
//%    misrepresented as being the original software.
//% 3. This notice may not be removed or altered from any source distribution.
//% Mark Adler    madler@alumni.caltech.edu

//% BEGIN CODE DERIVED FROM puff.{c,h}

#define MAXBITS 15
#define MAXLCODES 286
#define MAXDCODES 30
#define MAXCODES (MAXLCODES + MAXDCODES)
#define FIXLCODES 288

struct puff_state {
  unsigned char* out;
  unsigned long outlen;
  unsigned long outcnt;
  const unsigned char* in;
  unsigned long inlen;
  unsigned long incnt;
  int bitbuf;
  int bitcnt;
  jmp_buf env;
};
static int puff_bits(struct puff_state* s, int need)
{
  long val = s->bitbuf;
  while (s->bitcnt < need) {
    if (s->incnt == s->inlen)
      longjmp(s->env, 1);
    val |= (long)(s->in[s->incnt++]) << s->bitcnt;
    s->bitcnt += 8;
  }
  s->bitbuf = (int)(val >> need);
  s->bitcnt -= need;
  return (int)(val & ((1L << need) - 1));
}
static int puff_stored(struct puff_state* s)
{
  s->bitbuf = 0;
  s->bitcnt = 0;
  if (s->incnt + 4 > s->inlen)
    return 2;
  unsigned len = s->in[s->incnt++];
  len |= s->in[s->incnt++] << 8;
  if (s->in[s->incnt++] != (~len & 0xff) ||
      s->in[s->incnt++] != ((~len >> 8) & 0xff))
    return -2;
  if (s->incnt + len > s->inlen)
    return 2;
  if (s->outcnt + len > s->outlen)
    return 1;
  for (; len--; s->outcnt++, s->incnt++) {
    if (s->in[s->incnt])
      s->out[s->outcnt] = s->in[s->incnt];
  }
  return 0;
}
struct puff_huffman {
  short* count;
  short* symbol;
};
static int puff_decode(struct puff_state* s, const struct puff_huffman* h)
{
  int first = 0;
  int index = 0;
  int bitbuf = s->bitbuf;
  int left = s->bitcnt;
  int code = first = index = 0;
  int len = 1;
  short* next = h->count + 1;
  while (1) {
    while (left--) {
      code |= bitbuf & 1;
      bitbuf >>= 1;
      int count = *next++;
      if (code - count < first) {
        s->bitbuf = bitbuf;
        s->bitcnt = (s->bitcnt - len) & 7;
        return h->symbol[index + (code - first)];
      }
      index += count;
      first += count;
      first <<= 1;
      code <<= 1;
      len++;
    }
    left = (MAXBITS + 1) - len;
    if (left == 0)
      break;
    if (s->incnt == s->inlen)
      longjmp(s->env, 1);
    bitbuf = s->in[s->incnt++];
    if (left > 8)
      left = 8;
  }
  return -10;
}
static int puff_construct(struct puff_huffman* h, const short* length, int n)
{
  int len;
  for (len = 0; len <= MAXBITS; len++)
    h->count[len] = 0;
  int symbol;
  for (symbol = 0; symbol < n; symbol++)
    (h->count[length[symbol]])++;
  if (h->count[0] == n)
    return 0;
  int left = 1;
  for (len = 1; len <= MAXBITS; len++) {
    left <<= 1;
    left -= h->count[len];
    if (left < 0)
      return left;
  }
  short offs[MAXBITS + 1];
  offs[1] = 0;
  for (len = 1; len < MAXBITS; len++)
    offs[len + 1] = offs[len] + h->count[len];
  for (symbol = 0; symbol < n; symbol++)
    if (length[symbol] != 0)
      h->symbol[offs[length[symbol]]++] = symbol;
  return left;
}
static int puff_codes(struct puff_state* s, const struct puff_huffman* lencode,
                      const struct puff_huffman* distcode)
{
  static const short lens[29] = {3,  4,  5,  6,   7,   8,   9,   10,  11, 13,
                                 15, 17, 19, 23,  27,  31,  35,  43,  51, 59,
                                 67, 83, 99, 115, 131, 163, 195, 227, 258};
  static const short lext[29] = {0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2,
                                 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 0};
  static const short dists[30] = {
      1,    2,    3,    4,    5,    7,    9,    13,    17,    25,
      33,   49,   65,   97,   129,  193,  257,  385,   513,   769,
      1025, 1537, 2049, 3073, 4097, 6145, 8193, 12289, 16385, 24577};
  static const short dext[30] = {0, 0, 0,  0,  1,  1,  2,  2,  3,  3,
                                 4, 4, 5,  5,  6,  6,  7,  7,  8,  8,
                                 9, 9, 10, 10, 11, 11, 12, 12, 13, 13};
  int symbol;
  do {
    symbol = puff_decode(s, lencode);
    if (symbol < 0)
      return symbol;
    if (symbol < 256) {
      if (s->outcnt == s->outlen)
        return 1;
      if (symbol)
        s->out[s->outcnt] = symbol;
      s->outcnt++;
    } else if (symbol > 256) {
      symbol -= 257;
      if (symbol >= 29)
        return -10;
      int len = lens[symbol] + puff_bits(s, lext[symbol]);
      symbol = puff_decode(s, distcode);
      if (symbol < 0)
        return symbol;
      unsigned dist = dists[symbol] + puff_bits(s, dext[symbol]);
      if (dist > s->outcnt)
        return -11;
      if (s->outcnt + len > s->outlen)
        return 1;
      while (len--) {
        if (dist <= s->outcnt && s->out[s->outcnt - dist])
          s->out[s->outcnt] = s->out[s->outcnt - dist];
        s->outcnt++;
      }
    }
  } while (symbol != 256);
  return 0;
}
static int puff_fixed(struct puff_state* s)
{
  static int virgin = 1;
  static short lencnt[MAXBITS + 1], lensym[FIXLCODES];
  static short distcnt[MAXBITS + 1], distsym[MAXDCODES];
  static struct puff_huffman lencode, distcode;
  if (virgin) {
    lencode.count = lencnt;
    lencode.symbol = lensym;
    distcode.count = distcnt;
    distcode.symbol = distsym;
    short lengths[FIXLCODES];
    int symbol;
    for (symbol = 0; symbol < 144; symbol++)
      lengths[symbol] = 8;
    for (; symbol < 256; symbol++)
      lengths[symbol] = 9;
    for (; symbol < 280; symbol++)
      lengths[symbol] = 7;
    for (; symbol < FIXLCODES; symbol++)
      lengths[symbol] = 8;
    puff_construct(&lencode, lengths, FIXLCODES);
    for (symbol = 0; symbol < MAXDCODES; symbol++)
      lengths[symbol] = 5;
    puff_construct(&distcode, lengths, MAXDCODES);
    virgin = 0;
  }
  return puff_codes(s, &lencode, &distcode);
}
static int puff_dynamic(struct puff_state* s)
{
  static const short order[19] = {16, 17, 18, 0, 8,  7, 9,  6, 10, 5,
                                  11, 4,  12, 3, 13, 2, 14, 1, 15};
  int nlen = puff_bits(s, 5) + 257;
  int ndist = puff_bits(s, 5) + 1;
  int ncode = puff_bits(s, 4) + 4;
  if (nlen > MAXLCODES || ndist > MAXDCODES)
    return -3;
  short lengths[MAXCODES];
  int index;
  for (index = 0; index < ncode; index++)
    lengths[order[index]] = puff_bits(s, 3);
  for (; index < 19; index++)
    lengths[order[index]] = 0;
  short lencnt[MAXBITS + 1], lensym[MAXLCODES];
  struct puff_huffman lencode = {lencnt, lensym};
  int err = puff_construct(&lencode, lengths, 19);
  if (err != 0)
    return -4;
  index = 0;
  while (index < nlen + ndist) {
    int symbol;
    int len;
    symbol = puff_decode(s, &lencode);
    if (symbol < 0)
      return symbol;
    if (symbol < 16)
      lengths[index++] = symbol;
    else {
      len = 0;
      if (symbol == 16) {
        if (index == 0)
          return -5;
        len = lengths[index - 1];
        symbol = 3 + puff_bits(s, 2);
      } else if (symbol == 17)
        symbol = 3 + puff_bits(s, 3);
      else
        symbol = 11 + puff_bits(s, 7);
      if (index + symbol > nlen + ndist)
        return -6;
      while (symbol--)
        lengths[index++] = len;
    }
  }
  if (lengths[256] == 0)
    return -9;
  err = puff_construct(&lencode, lengths, nlen);
  if (err && (err < 0 || nlen != lencode.count[0] + lencode.count[1]))
    return -7;
  short distcnt[MAXBITS + 1], distsym[MAXDCODES];
  struct puff_huffman distcode = {distcnt, distsym};
  err = puff_construct(&distcode, lengths + nlen, ndist);
  if (err && (err < 0 || ndist != distcode.count[0] + distcode.count[1]))
    return -8;
  return puff_codes(s, &lencode, &distcode);
}
static int puff(unsigned char* dest, unsigned long* destlen,
                const unsigned char* source, unsigned long sourcelen)
{
  struct puff_state s = {
      .out = dest,
      .outlen = *destlen,
      .outcnt = 0,
      .in = source,
      .inlen = sourcelen,
      .incnt = 0,
      .bitbuf = 0,
      .bitcnt = 0,
  };
  int err;
  if (setjmp(s.env) != 0)
    err = 2;
  else {
    int last;
    do {
      last = puff_bits(&s, 1);
      int type = puff_bits(&s, 2);
      err = type == 0 ? puff_stored(&s)
                      : (type == 1 ? puff_fixed(&s)
                                   : (type == 2 ? puff_dynamic(&s) : -1));
      if (err != 0)
        break;
    } while (!last);
  }
  *destlen = s.outcnt;
  return err;
}

//% END CODE DERIVED FROM puff.{c,h}

#define ZLIB_HEADER_WIDTH 2

static int puff_zlib_to_file(const unsigned char* source,
                             unsigned long sourcelen, int dest_fd)
{
  if (sourcelen < ZLIB_HEADER_WIDTH)
    return 0;
  source += ZLIB_HEADER_WIDTH;
  sourcelen -= ZLIB_HEADER_WIDTH;
  const unsigned long max_destlen = 132 << 20;
  void* ret = mmap(0, max_destlen, PROT_WRITE | PROT_READ,
                   MAP_PRIVATE | MAP_ANON, -1, 0);
  if (ret == MAP_FAILED)
    return -1;
  unsigned char* dest = (unsigned char*)ret;
  unsigned long destlen = max_destlen;
  int err = puff(dest, &destlen, source, sourcelen);
  if (err) {
    munmap(dest, max_destlen);
    errno = -err;
    return -1;
  }
  if (write(dest_fd, dest, destlen) != (ssize_t)destlen) {
    munmap(dest, max_destlen);
    return -1;
  }
  return munmap(dest, max_destlen);
}

static int setup_loop_device(unsigned char* data, unsigned long size,
                             const char* loopname, int* loopfd_p)
{
  int err = 0, loopfd = -1;
  int memfd = syscall(__NR_memfd_create, "syzkaller", 0);
  if (memfd == -1) {
    err = errno;
    goto error;
  }
  if (puff_zlib_to_file(data, size, memfd)) {
    err = errno;
    goto error_close_memfd;
  }
  loopfd = open(loopname, O_RDWR);
  if (loopfd == -1) {
    err = errno;
    goto error_close_memfd;
  }
  if (ioctl(loopfd, LOOP_SET_FD, memfd)) {
    if (errno != EBUSY) {
      err = errno;
      goto error_close_loop;
    }
    ioctl(loopfd, LOOP_CLR_FD, 0);
    usleep(1000);
    if (ioctl(loopfd, LOOP_SET_FD, memfd)) {
      err = errno;
      goto error_close_loop;
    }
  }
  close(memfd);
  *loopfd_p = loopfd;
  return 0;

error_close_loop:
  close(loopfd);
error_close_memfd:
  close(memfd);
error:
  errno = err;
  return -1;
}

static void reset_loop_device(const char* loopname)
{
  int loopfd = open(loopname, O_RDWR);
  if (loopfd == -1) {
    return;
  }
  if (ioctl(loopfd, LOOP_CLR_FD, 0)) {
  }
  close(loopfd);
}

static long syz_mount_image(volatile long fsarg, volatile long dir,
                            volatile long flags, volatile long optsarg,
                            volatile long change_dir,
                            volatile unsigned long size, volatile long image)
{
  unsigned char* data = (unsigned char*)image;
  int res = -1, err = 0, need_loop_device = !!size;
  char* mount_opts = (char*)optsarg;
  char* target = (char*)dir;
  char* fs = (char*)fsarg;
  char* source = NULL;
  char loopname[64];
  if (need_loop_device) {
    int loopfd;
    memset(loopname, 0, sizeof(loopname));
    snprintf(loopname, sizeof(loopname), "/dev/loop%llu", procid);
    if (setup_loop_device(data, size, loopname, &loopfd) == -1)
      return -1;
    close(loopfd);
    source = loopname;
  }
  mkdir(target, 0777);
  char opts[256];
  memset(opts, 0, sizeof(opts));
  if (strlen(mount_opts) > (sizeof(opts) - 32)) {
  }
  strncpy(opts, mount_opts, sizeof(opts) - 32);
  if (strcmp(fs, "iso9660") == 0) {
    flags |= MS_RDONLY;
  } else if (strncmp(fs, "ext", 3) == 0) {
    bool has_remount_ro = false;
    char* remount_ro_start = strstr(opts, "errors=remount-ro");
    if (remount_ro_start != NULL) {
      char after = *(remount_ro_start + strlen("errors=remount-ro"));
      char before = remount_ro_start == opts ? '\0' : *(remount_ro_start - 1);
      has_remount_ro = ((before == '\0' || before == ',') &&
                        (after == '\0' || after == ','));
    }
    if (strstr(opts, "errors=panic") || !has_remount_ro)
      strcat(opts, ",errors=continue");
  } else if (strcmp(fs, "xfs") == 0) {
    strcat(opts, ",nouuid");
  } else if (strncmp(fs, "gfs2", 4) == 0 &&
             (strstr(opts, "errors=panic") || strstr(opts, "debug"))) {
    strcat(opts, ",errors=withdraw");
  }
  res = mount(source, target, fs, flags, opts);
  if (res == -1) {
    err = errno;
    goto error_clear_loop;
  }
  res = open(target, O_RDONLY | O_DIRECTORY);
  if (res == -1) {
    err = errno;
    goto error_clear_loop;
  }
  if (change_dir) {
    res = chdir(target);
    if (res == -1) {
      err = errno;
    }
  }

error_clear_loop:
  if (need_loop_device)
    reset_loop_device(loopname);
  errno = err;
  return res;
}

#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 reset_loop()
{
  char buf[64];
  snprintf(buf, sizeof(buf), "/dev/loop%llu", procid);
  int loopfd = open(buf, O_RDWR);
  if (loopfd != -1) {
    ioctl(loopfd, LOOP_CLR_FD, 0);
    close(loopfd);
  }
}

static void setup_test()
{
  prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
  setpgrp();
  write_file("/proc/self/oom_score_adj", "1000");
  if (symlink("/dev/binderfs", "./binderfs")) {
  }
}

static void setup_sysctl()
{
  int cad_pid = fork();
  if (cad_pid < 0)
    exit(1);
  if (cad_pid == 0) {
    for (;;)
      sleep(100);
  }
  char tmppid[32];
  snprintf(tmppid, sizeof(tmppid), "%d", cad_pid);
  struct {
    const char* name;
    const char* data;
  } files[] = {
      {"/sys/kernel/debug/x86/nmi_longest_ns", "10000000000"},
      {"/proc/sys/kernel/hung_task_check_interval_secs", "20"},
      {"/proc/sys/net/core/bpf_jit_kallsyms", "1"},
      {"/proc/sys/net/core/bpf_jit_harden", "0"},
      {"/proc/sys/kernel/kptr_restrict", "0"},
      {"/proc/sys/kernel/softlockup_all_cpu_backtrace", "1"},
      {"/proc/sys/fs/mount-max", "100"},
      {"/proc/sys/vm/oom_dump_tasks", "0"},
      {"/proc/sys/debug/exception-trace", "0"},
      {"/proc/sys/kernel/printk", "7 4 1 3"},
      {"/proc/sys/kernel/keys/gc_delay", "1"},
      {"/proc/sys/vm/oom_kill_allocating_task", "1"},
      {"/sys/kernel/debug/failslab/task-filter", "Y"},
      {"/sys/kernel/debug/fail_page_alloc/task-filter", "Y"},
      {"/sys/kernel/debug/fail_futex/task-filter", "Y"},
      {"/sys/kernel/debug/fail_usercopy/task-filter", "Y"},
      {"/sys/kernel/debug/fail_make_request/task-filter", "Y"},
      {"/sys/kernel/debug/fail_io_timeout/task-filter", "Y"},
      {"/sys/kernel/debug/fail_iommufd/task-filter", "Y"},
      {"/proc/sys/kernel/ctrl-alt-del", "0"},
      {"/proc/sys/kernel/cad_pid", tmppid},
  };
  for (size_t i = 0; i < sizeof(files) / sizeof(files[0]); i++) {
    if (!write_file(files[i].name, files[i].data)) {
    }
  }
  kill(cad_pid, SIGKILL);
  while (waitpid(cad_pid, NULL, 0) != cad_pid)
    ;
}

struct thread_t {
  int created, call;
  event_t ready, done;
};

static struct thread_t threads[16];
static void execute_call(int call);
static int running;

static void* thr(void* arg)
{
  struct thread_t* th = (struct thread_t*)arg;
  for (;;) {
    event_wait(&th->ready);
    event_reset(&th->ready);
    execute_call(th->call);
    __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED);
    event_set(&th->done);
  }
  return 0;
}

static void execute_one(void)
{
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  int i, call, thread;
  for (call = 0; call < 4; call++) {
    for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0]));
         thread++) {
      struct thread_t* th = &threads[thread];
      if (!th->created) {
        th->created = 1;
        event_init(&th->ready);
        event_init(&th->done);
        event_set(&th->done);
        thread_start(thr, th);
      }
      if (!event_isset(&th->done))
        continue;
      event_reset(&th->done);
      th->call = call;
      __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED);
      event_set(&th->ready);
      event_timedwait(&th->done,
                      50 + (call == 0 ? 4000 : 0) + (call == 3 ? 4000 : 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++) {
    char cwdbuf[32];
    sprintf(cwdbuf, "./%d", iter);
    if (mkdir(cwdbuf, 0777))
      exit(1);
    reset_loop();
    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[1] = {0xffffffffffffffff};

void execute_call(int call)
{
  intptr_t res = 0;
  switch (call) {
  case 0:
    //  syz_mount_image$exfat arguments: [
    //    fs: ptr[in, buffer] {
    //      buffer: {65 78 66 61 74 00} (length 0x6)
    //    }
    //    dir: ptr[in, buffer] {
    //      buffer: {2e 2f 63 6f 6e 66 69 67 00} (length 0x9)
    //    }
    //    flags: mount_flags = 0x200880 (8 bytes)
    //    opts: ptr[inout, array[ANYUNION]] {
    //      array[ANYUNION] {
    //      }
    //    }
    //    chdir: int8 = 0x3 (1 bytes)
    //    size: len = 0x1518 (8 bytes)
    //    img: ptr[in, buffer] {
    //      buffer: (compressed buffer with length 0x1518)
    //    }
    //  ]
    //  returns fd_dir
    NONFAILING(memcpy((void*)0x2000000000c0, "exfat\000", 6));
    NONFAILING(memcpy((void*)0x200000000040, "./config\000", 9));
    NONFAILING(memcpy(
        (void*)0x200000006800,
        "\x78\x9c\xec\xdc\x0b\x9c\x4e\xd5\xfa\x38\xf0\xe7\x59\x6b\xed\x31\x24"
        "\xbd\x49\x2e\xc3\x5a\xeb\xd9\xbc\xc9\x65\x99\x24\xc9\x25\x49\x2e\x49"
        "\x92\x24\x49\x6e\x09\xa1\x49\x8e\x24\x24\x86\xdc\x92\x86\x24\x24\x97"
        "\x21\xb9\x0c\x21\xb9\x4c\x4c\x1a\xf7\xfb\xfd\x9a\x24\x49\x93\x24\x21"
        "\xb9\x25\xeb\xff\x99\xe2\x38\x9d\xea\x7f\x7e\xfd\x4e\xbf\xe3\x7c\x9a"
        "\xe7\xfb\xf9\xec\xcf\xec\xe7\x5d\xfb\x59\x7b\xed\xf7\xd9\xef\xfb\xae"
        "\xbd\x67\xde\xf9\xba\xcb\xd0\x1a\x8d\x6a\x56\x6d\x40\x44\xf0\x6f\xc1"
        "\x9f\x7f\x24\x02\x40\x2c\x00\x0c\x04\x80\x6b\x00\x20\x00\x80\xb2\xb9"
        "\xcb\xe6\xce\x6c\xcf\x2e\x31\xf1\xdf\xdb\x09\xfb\x73\x3d\x94\x72\xa5"
        "\x47\xc0\xae\x24\xae\x7f\xd6\xc6\xf5\xcf\xda\xb8\xfe\x59\x1b\xd7\x3f"
        "\x6b\xe3\xfa\x67\x6d\x5c\xff\xac\x8d\xeb\x9f\xb5\x71\xfd\x19\xcb\xca"
        "\x36\x4f\x2f\x70\x2d\x2f\x59\x77\xe1\xfb\xff\x59\x19\x7f\xfe\xff\x85"
        "\x64\x94\x1a\xfb\xf9\xda\x52\xd7\x77\xfd\x03\x29\x5c\xff\xbf\x9e\x3f"
        "\xf2\x16\xcb\xf5\xff\xcb\x0a\xfe\x27\x1b\x71\xfd\xb3\x36\xae\x7f\xd6"
        "\xc6\xf5\xcf\xda\xb8\xfe\x59\x41\xb6\xdf\x6d\xe1\xfa\xff\x05\xfd\x7e"
        "\xb9\x7f\x85\xeb\xcf\x58\x56\xf6\xa7\xdd\x4b\x06\xb8\xe2\xf7\xb2\x79"
        "\xf9\xe3\xcb\x95\x3e\xff\x18\x63\x8c\x31\xc6\x18\x63\x8c\x31\xc6\x18"
        "\x63\x8c\x31\xc6\x18\x63\x8c\x31\xc6\x18\x63\x8c\x31\xc6\x18\x63\x8c"
        "\x31\xc6\x18\x63\x8c\x31\xc6\x18\x63\x8c\x31\xc6\x18\x63\x8c\x31\xc6"
        "\x18\x63\x8c\x31\xc6\x18\x63\x8c\x31\xc6\x18\x63\x8c\x31\xc6\x18\x63"
        "\x8c\x31\xc6\x18\x63\x8c\x31\xc6\x18\x63\x8c\x31\xc6\x18\x63\x8c\x31"
        "\xc6\x18\x63\x8c\x31\xc6\x18\x63\x8c\x31\xc6\x18\x63\x8c\x31\xc6\x18"
        "\x63\x8c\x31\xc6\x18\x63\x8c\x31\xc6\x18\x63\x8c\x31\xc6\x18\x63\x8c"
        "\x31\xc6\x18\x63\x8c\x31\xc6\x18\x63\x8c\x31\xc6\x18\x63\x8c\x65\x0d"
        "\x67\xfc\x65\x0a\x00\x2e\xad\x5f\xe9\x71\x31\xc6\x18\x63\x8c\x31\xc6"
        "\x18\x63\xec\xcf\xe3\xb3\x5d\xe9\x11\x30\xc6\x18\x63\x8c\x31\xc6\x18"
        "\x63\xec\xff\x1e\x82\x00\x09\x0a\x02\x88\x81\x6c\x10\x0b\xd9\x21\x07"
        "\x08\x00\xb8\x1a\x72\xc1\x35\x10\x81\x6b\x21\x37\x5c\x07\x79\xe0\x7a"
        "\xc8\x0b\xf9\x20\x3f\x14\x80\x38\x28\x08\x85\x40\x83\x01\x0b\x04\x21"
        "\x14\x86\x22\x10\x85\x1b\xa0\x28\xdc\x08\xc5\xa0\x38\x94\x80\x92\xe0"
        "\xa0\x14\xc4\xc3\x4d\x50\x1a\x6e\x86\x32\x70\x0b\x94\x85\x5b\xa1\x1c"
        "\xdc\x06\xe5\xa1\x02\x54\x84\x4a\x70\x3b\x54\x86\x3b\xa0\x0a\xdc\x09"
        "\x55\xe1\x2e\xa8\x06\xd5\xa1\x06\xd4\x84\xbb\xa1\x16\xdc\x03\xb5\xe1"
        "\x5e\xa8\x03\xf7\x41\x5d\xb8\x1f\xea\xc1\x03\x50\x1f\x1e\x84\x06\xf0"
        "\x10\x34\x84\x87\xa1\x11\x3c\x02\x8d\xe1\x51\x68\x02\x4d\xa1\x19\x34"
        "\x87\x16\xff\xab\xfc\xe7\xa1\x07\xbc\x00\x3d\xa1\x17\x24\x42\x6f\xe8"
        "\x03\x2f\x42\x5f\xe8\x07\xfd\x61\x00\x0c\x84\x97\x60\x10\xbc\x0c\x83"
        "\xe1\x15\x48\x82\x21\x30\x14\x5e\x85\x61\xf0\x1a\x0c\x87\xd7\x61\x04"
        "\x8c\x84\x51\xf0\x06\x8c\x86\x37\x61\x0c\x8c\x85\x71\x30\x1e\x92\x61"
        "\x02\x4c\x84\xb7\x60\x12\xbc\x0d\x93\x61\x0a\x4c\x85\x69\x90\x02\xd3"
        "\x61\x06\xbc\x03\x33\x61\x16\xcc\x86\x77\x61\x0e\xbc\x07\x73\x61\x1e"
        "\xcc\x87\x05\x90\x0a\xef\xc3\x42\x58\x04\x69\xf0\x01\x2c\x86\x0f\x21"
        "\x1d\x96\xc0\x52\x58\x06\xcb\x61\x05\xac\x84\x55\xb0\x1a\xd6\xc0\x5a"
        "\x58\x07\xeb\x61\x03\x6c\x84\x4d\xb0\x19\xb6\xc0\x56\xd8\x06\xdb\x61"
        "\x07\xec\x84\x5d\xb0\x1b\x3e\x82\x3d\xf0\x31\xec\x85\x4f\x60\x1f\x7c"
        "\xfa\x07\xf3\x4f\xff\x53\x7e\x57\x04\x04\x14\x28\x50\xa1\xc2\x18\x8c"
        "\xc1\x58\x8c\xc5\x1c\x98\x03\x73\x62\x4e\xcc\x85\xb9\x62\x2f\x9d\x24"
        "\x79\x30\x0f\xe6\xc5\xbc\x98\x1f\xf3\x63\x1c\xc6\x61\x21\x2c\x84\x06"
        "\x0d\x12\x12\x16\xc6\xc2\x18\xc5\x28\x16\xc5\xa2\x58\x0c\x8b\x61\x09"
        "\x2c\x81\x0e\x1d\xc6\x63\x3c\x96\xc6\x9b\xb1\x0c\x96\xc1\xb2\x58\x16"
        "\xcb\x61\x39\x2c\x8f\x15\xb0\x02\x56\xc2\x4a\x58\x19\x2b\x63\x15\xac"
        "\x82\x55\xb1\x2a\x56\xc3\x6a\x58\x03\x6b\xe0\xdd\x78\x37\xf6\xc6\xda"
        "\x58\x1b\xeb\x60\x1d\xac\x8b\x75\x2f\xdd\x9e\xc2\x06\xd8\x00\x1b\x62"
        "\x43\x6c\x84\x8d\xb0\x31\x36\xc6\x26\xd8\x04\x9b\x61\x33\x6c\x81\x2d"
        "\xb0\x25\xb6\xc4\x56\xd8\x0a\xdb\x60\x1b\x6c\x8b\x6d\xb1\x3d\xb6\xc7"
        "\x04\x4c\xc0\x0e\xd8\x01\x3b\x62\x47\xec\x84\x9d\xb0\x33\x76\xc6\x2e"
        "\xd8\x05\xbb\x62\x37\xec\x86\xcf\x67\x03\x7c\x01\x5f\xc0\x5e\x58\x4d"
        "\xf4\xc6\x3e\xd8\x07\xfb\x62\x52\xb6\xfe\x38\x00\x07\xe0\x4b\x38\x08"
        "\x5f\xc6\x97\xf1\x15\x4c\xc2\x21\x38\x14\x5f\xc5\x57\xf1\x35\x1c\x8e"
        "\xa7\x70\x04\x8e\xc4\x51\x38\x0a\x2b\x8b\x37\x71\x0c\x8e\x45\x12\xe3"
        "\x31\x19\x93\x71\x22\x4e\xc4\x49\x38\x09\x27\xe3\x14\x9c\x82\xd3\x30"
        "\x05\xa7\xe3\x0c\x9c\x81\x33\x71\x16\xce\xc2\x77\x71\x0e\xbe\x87\xef"
        "\xe1\x3c\x9c\x87\x0b\x30\x15\x53\x71\x21\x2e\xc2\x34\x4c\xc3\xc5\x78"
        "\x1a\xd3\x71\x09\x2e\xc5\x65\xb8\x1c\x57\xe0\x72\x5c\x85\xab\x71\x15"
        "\xae\xc5\x75\xb8\x16\x37\xe0\x06\xdc\x84\x9b\x70\x0b\x6e\xc1\x6d\xb8"
        "\x0d\x77\xe0\x0e\xdc\x85\x0a\x00\x3f\xc2\x8f\xf1\x63\x4c\xc2\x7d\xb8"
        "\x0f\xf7\xe3\x7e\x3c\x80\x07\xf0\x20\x1e\xc4\x0c\xcc\xc0\x43\x78\x08"
        "\x0f\xe3\x61\x3c\x82\x47\xf0\x28\x1e\xc5\x63\x78\x1c\x4f\xe0\x71\x3c"
        "\x89\x27\xf1\x14\x9e\xc6\x33\x78\x06\xcf\xe1\x39\x3c\x8f\xcf\xc6\x7d"
        "\xd9\x70\x57\xf1\x35\x49\x20\x32\x29\xa1\x44\x8c\x88\x11\xb1\x22\x56"
        "\xe4\x10\x39\x44\x4e\x91\x53\xe4\x12\xb9\x44\x44\x44\x44\x6e\x91\x5b"
        "\xe4\x11\x79\x44\x5e\x91\x57\xe4\x17\xf9\x45\x9c\x88\x13\x85\x44\x21"
        "\x61\x84\x11\x24\xc2\x18\x00\x10\x51\x11\x15\x45\x45\x51\x51\x4c\x14"
        "\x13\x25\x44\x09\xe1\x84\x13\xf1\x22\x5e\x94\x16\xa5\x45\x19\x51\x46"
        "\x94\x15\xb7\x8a\x72\xe2\x36\x51\x5e\x54\x10\xad\x5d\x25\x51\x49\x54"
        "\x16\x6d\x5c\x15\x71\xa7\xa8\x2a\xaa\x8a\x6a\xa2\xba\xa8\x21\x6a\x8a"
        "\x9a\xa2\x96\xa8\x25\x6a\x8b\xda\xa2\x8e\xa8\x23\xea\x8a\xba\xa2\x9e"
        "\x78\x40\xd4\x17\xbd\xb1\x3f\x3e\x24\x32\x2b\xd3\x48\x0c\xc1\xc6\x62"
        "\x28\x36\x11\x4d\x85\xbc\x78\x72\xb6\x14\xc3\xb1\x95\x68\x2d\xda\x88"
        "\x27\xc4\x48\x1c\x81\xed\x45\x4b\x97\x20\x9e\x12\x1d\xc4\x18\xec\x28"
        "\xfe\x26\xc6\xe2\x33\xa2\xb3\x18\x8f\x5d\xc4\x73\xa2\xab\xe8\x26\xba"
        "\x8b\xe7\x45\x0f\xd1\xca\xf5\x14\xbd\xc4\x64\xec\x2d\xfa\x88\x69\xd8"
        "\x57\xf4\x13\xfd\xc5\x00\x31\x13\xab\x8b\x77\x71\x4e\xf6\x1a\xe2\x15"
        "\x91\x24\x86\x88\xa1\xe2\x55\xb1\x00\x5f\x13\xc3\xc5\xeb\x62\x84\x18"
        "\x29\x46\x89\x37\xc4\x68\xf1\xa6\x18\x23\xc6\x8a\x71\x62\xbc\x48\x16"
        "\x13\xc4\x44\xf1\x96\x98\x24\xde\x16\x93\xc5\x14\x31\x55\x4c\x13\x29"
        "\x62\xba\x98\x21\xde\x11\x33\xc5\x2c\x31\x5b\xbc\x2b\xe6\x88\xf7\xc4"
        "\x5c\x31\x4f\xcc\x17\x0b\x44\xaa\x78\x5f\x2c\x14\x8b\x44\x9a\xf8\x40"
        "\x2c\x16\x1f\x8a\x74\xb1\x44\x2c\x15\xcb\xc4\x72\xb1\x42\xac\x14\xab"
        "\xc4\x6a\xb1\x46\xac\x15\xeb\xc4\x7a\xb1\x41\x6c\x14\x9b\xc4\x66\xb1"
        "\x45\x6c\x15\xdb\xc4\x76\xb1\x43\xec\x14\xbb\xc4\x6e\xf1\x91\xd8\x23"
        "\x3e\x16\x7b\xc5\x27\x62\x9f\xf8\x54\xec\x17\x9f\x89\x03\xe2\x73\x71"
        "\x50\x7c\x21\x32\xc4\x97\xe2\x90\xf8\x4a\x1c\x16\x5f\x8b\x23\xe2\x1b"
        "\x71\x54\x7c\x2b\x8e\x89\xe3\xe2\x84\xf8\x4e\x9c\x14\xdf\x8b\x53\xe2"
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        "\xb3\x7b\xec\xc7\xf6\x8c\x3d\x6b\x0f\xdb\xaf\xed\x39\xfb\x83\xed\x69"
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        "\xb3\x9f\xda\x43\xf6\x2b\x7b\xc0\x7e\x6e\x0f\xda\x23\x36\xc3\x7e\xf9"
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        "\x9d\x3d\x69\xbf\xb7\xa7\xec\xe9\x9f\x8e\x3f\xf3\xd8\xbf\xb3\x3f\xda"
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        "\x5d\x45\x39\xe9\x6a\xca\x45\xd7\x50\x84\xae\xa5\xdc\x74\x1d\xe5\xa1"
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        "\x78\xba\x89\x4a\xd3\xcd\x54\x86\x6e\xa1\xb2\x74\x2b\x95\xa3\xdb\xa8"
        "\x3c\x55\xa0\x8a\x54\x89\x6e\xa7\xca\x74\x07\x55\xa1\x3b\xa9\x2a\xdd"
        "\x45\xd5\xa8\x3a\xd5\xa0\x9a\x74\x37\xd5\xa2\x7b\xa8\x36\xdd\x4b\x75"
        "\xe8\x3e\xaa\x4b\xf7\x53\x3d\x7a\x80\xea\xd3\x83\xd4\x80\x1e\xa2\x86"
        "\xf4\x30\x35\xa2\x47\xa8\x31\x3d\x4a\x4d\xa8\x29\x35\xa3\xe6\xd4\x82"
        "\x1e\xa3\x96\xf4\x38\xb5\xa2\xd6\xd4\x86\x9e\xa0\xb6\xd4\x8e\xda\xd3"
        "\x93\x94\x40\x4f\x51\x07\x7a\x9a\x3a\xd2\xdf\xa8\x13\x3d\x43\x9d\xe9"
        "\x59\xea\x42\xcf\x51\x57\xea\x46\xdd\xe9\x79\xea\x41\x2f\x50\x4f\xea"
        "\x45\x89\xd4\x9b\xfa\xd0\x8b\xd4\x97\xfa\x51\x7f\x1a\x40\x03\xe9\x25"
        "\x1a\x44\x2f\xd3\x60\x7a\x85\x92\x68\x08\x0d\xa5\x57\x69\x18\xbd\x46"
        "\xc3\xe9\x75\x1a\x41\x23\x69\x14\xbd\x41\xa3\xe9\x4d\x1a\x43\x63\x69"
        "\x1c\x8d\xa7\x64\x9a\x40\x13\xe9\x2d\x9a\x44\x6f\xd3\x64\x9a\x42\x53"
        "\x69\x1a\xa5\xd0\x74\x9a\x41\xef\xd0\x4c\x9a\x45\xb3\xe9\x5d\x9a\x43"
        "\xef\xd1\x5c\x9a\x47\xf3\x69\x01\xa5\xd2\xfb\xb4\x90\x16\x51\x1a\x7d"
        "\x40\x8b\xe9\x43\x4a\xa7\x25\xb4\x94\x96\xd1\x72\x5a\x41\x2b\x69\x15"
        "\xad\xa6\x35\xb4\x96\xd6\xd1\x7a\xda\x40\x1b\x69\x13\x6d\xa6\x2d\xb4"
        "\x95\xb6\xd1\x76\xda\x41\x3b\x69\x17\xed\xa6\x8f\x68\x0f\x7d\x4c\x7b"
        "\xe9\x13\xda\x47\x9f\xd2\x7e\xfa\x8c\x0e\xd0\xe7\x74\x90\xbe\xa0\x0c"
        "\xfa\x92\x0e\xd1\x57\x74\x98\xbe\xa6\x23\xf4\x8d\xef\x45\xdf\xd2\x31"
        "\x3a\x4e\x27\xe8\x3b\x3a\x49\xdf\xd3\x29\x3a\x4d\x67\xe8\x2c\x9d\xa3"
        "\x1f\xe8\x3c\xfd\x48\x17\xc8\x13\x84\x18\x8a\x50\x86\x2a\x0c\xc2\x98"
        "\x30\x5b\x18\x1b\x66\x0f\x73\x84\x57\x85\x39\xc3\xab\xc3\x5c\xe1\x35"
        "\x61\x24\xbc\x36\xcc\x1d\x5e\x17\xe6\x09\xaf\x0f\xf3\x86\xf9\xc2\xfc"
        "\x61\x81\x30\x2e\x2c\x18\x16\x0a\x75\x68\x42\x1b\x52\x18\x86\x85\xc3"
        "\x22\x61\x34\xbc\x21\x2c\x1a\xde\x18\x16\x0b\x8b\x87\x25\xc2\x92\xa1"
        "\x0b\x4b\x85\xf1\xe1\x4d\x61\xe9\xf0\xe6\xb0\x4c\x78\x4b\x58\x36\xbc"
        "\x35\x2c\x17\xde\x16\x96\x0f\x2b\x84\x8f\xdc\x57\x29\xbc\x3d\xac\x1c"
        "\xde\x11\x56\x09\xef\x0c\xab\x86\x77\x85\xd5\xc2\xea\x61\x8d\xb0\x66"
        "\x78\x77\x58\x2b\xbc\x27\xac\x1d\xde\x1b\xd6\x09\xef\x0b\xcb\x84\xf7"
        "\x87\xf5\xc2\x07\xc2\xfa\xe1\x83\x61\x83\xf0\xa1\xb0\x61\xf8\x70\xd8"
        "\x28\x7c\x24\x6c\x1c\x3e\x1a\x36\x09\x9b\x86\xcd\xc2\xe6\x61\x8b\xf0"
        "\xb1\xb0\x65\xf8\x78\xd8\x2a\x6c\x1d\xb6\x09\x9f\x08\xdb\x86\xed\xc2"
        "\xf6\xe1\x93\x61\x42\xf8\x54\xd8\x21\x7c\xfa\xa7\xf6\xfb\x17\xfd\x7e"
        "\x7b\x62\xd8\x3b\xec\x13\xbe\x18\xbe\x18\x7a\x7f\xaf\x9c\x1f\x5d\x10"
        "\x4d\x8d\xbe\x1f\x5d\x18\x5d\x14\x4d\x8b\x7e\x10\x5d\x1c\xfd\x30\x9a"
        "\x1e\x5d\x12\x5d\x1a\x5d\x16\x5d\x1e\x5d\x11\x5d\x19\x5d\x15\x5d\x1d"
        "\x5d\x13\x5d\x1b\x5d\x17\x5d\x1f\xdd\x10\xdd\x18\xdd\x14\xf5\xbe\x66"
        "\x36\x70\xe8\x84\x93\x4e\xb9\xc0\xc5\xb8\x6c\x2e\xd6\x65\x77\x39\xdc"
        "\x55\x2e\xa7\xbb\xda\xe5\x72\xd7\xb8\x88\xbb\xd6\xe5\x76\xd7\xb9\x3c"
        "\xee\x7a\x97\xd7\xe5\x73\xf9\x5d\x01\x17\xe7\x0a\xba\x42\x4e\x3b\xe3"
        "\xac\x23\x17\xba\xc2\xae\x88\x8b\xba\x1b\x5c\x51\x77\xa3\x2b\xe6\x8a"
        "\xbb\x12\xae\xa4\x73\xae\x94\x8b\x77\xcd\x5d\x0b\xd7\xc2\xb5\x74\x8f"
        "\xbb\x56\xae\xb5\x6b\xe3\x9e\x70\x4f\xb8\x76\xae\x9d\x7b\xd2\x3d\xe9"
        "\x9e\x72\x1d\xdc\xd3\xae\xa3\xfb\x9b\xeb\xe4\x9e\x71\x9d\xdd\xb3\xee"
        "\x59\xf7\x9c\xeb\xea\xba\xb9\xee\xee\x79\xd7\xc3\x4d\xc8\xf5\xf3\x6b"
        "\x32\xd1\xf5\x71\x7d\x5c\x5f\xd7\xd7\xf5\x77\xfd\xdd\x40\x37\xd0\x0d"
        "\x72\x83\xdc\x60\x37\xd8\x25\xb9\x24\x37\xd4\x0d\x75\xc3\xdc\x30\x37"
        "\xdc\x0d\x77\x23\xdc\x08\x37\xca\x8d\x72\xa3\xdd\x68\x37\xc6\x8d\x71"
        "\xe3\xdc\x38\x97\xec\x92\xdd\x44\x37\xd1\x4d\x72\x93\xdc\x64\x37\xd9"
        "\x4d\x75\x53\x5d\x8a\x4b\x71\x33\xdc\x0c\x37\xd3\xcd\x74\x95\x67\xfd"
        "\xbc\x97\xb9\x6e\xae\x9b\xef\xe6\xbb\x54\x97\xea\x16\xba\xcc\x39\x63"
        "\x9a\x5b\xec\x16\xbb\x74\x97\xee\x96\xba\xa5\x6e\xb9\x5b\xee\x56\xba"
        "\x95\x6e\xb5\x5b\xed\xd6\xba\xb5\x6e\xbd\x5b\xef\x36\xba\x8d\x6e\xb3"
        "\xdb\xec\xb6\xba\xad\x6e\xbb\xdb\xee\x76\xba\x9d\x6e\xb7\xdb\xed\xf6"
        "\xf8\x6b\x7e\xee\xd4\xed\x73\xfb\xdd\x7e\x77\xc0\x1d\x70\x07\xdd\x17"
        "\x2e\xc3\x7d\xe9\x0e\xb9\xaf\xdc\x61\xf7\xb5\x3b\xe2\xbe\x71\x47\xdd"
        "\xb7\xee\x98\x3b\xee\x4e\xb8\xef\xdc\x49\xf7\xbd\x3b\xe5\x4e\xbb\x33"
        "\xee\xac\x3b\xe7\x7e\x70\xe7\xdd\x8f\xee\x82\xf3\x2e\x39\x32\x21\x32"
        "\x31\xf2\x56\x64\x52\xe4\xed\xc8\xe4\xc8\x94\xc8\xd4\xc8\xb4\x48\x4a"
        "\x64\x7a\x64\x46\xe4\x9d\xc8\xcc\xc8\xac\xc8\xec\xc8\xbb\x91\x39\x91"
        "\xf7\x22\x73\x23\xf3\x22\xf3\x23\x0b\x22\xa9\x91\xf7\x23\x0b\x23\x8b"
        "\x22\x69\x91\x0f\x22\x8b\x23\x1f\x46\xd2\x23\x4b\x22\x4b\x23\xcb\x22"
        "\xcb\x23\x2b\x22\xde\x17\xdc\x1a\xfa\xc2\xbe\x88\x8f\xfa\x1b\x7c\x51"
        "\x7f\xa3\x2f\xe6\x8b\xfb\x12\xbe\xa4\x77\xbe\x94\x8f\xf7\x37\xf9\xd2"
        "\xfe\x66\x5f\xc6\xdf\xe2\xcb\xfa\x5b\x7d\x39\x7f\x9b\x2f\xef\x2b\xf8"
        "\x8a\xfe\x51\xdf\xc4\x37\xf5\xcd\x7c\x73\xdf\xc2\x3f\xe6\x5b\xfa\xc7"
        "\x7d\x2b\xdf\xda\xb7\xf1\x4f\xf8\xb6\xbe\x9d\x6f\xef\x9f\xf4\x09\xfe"
        "\x29\xdf\xc1\x3f\xed\x3b\xfa\xbf\xf9\x4e\xfe\x19\xdf\xd9\x3f\xeb\xbb"
        "\xf8\xe7\x7c\x57\xdf\xcd\x77\xf7\xcf\xfb\x1e\xfe\x05\xdf\xd3\xf7\xf2"
        "\x89\xbe\xb7\xef\xe3\x5f\xf4\x7d\x7d\x3f\xdf\xdf\x0f\xf0\x03\xfd\x4b"
        "\x7e\x90\x7f\xd9\x0f\xf6\xaf\xf8\x24\x3f\xc4\x0f\xf5\xaf\xfa\x61\xfe"
        "\x35\x3f\xdc\xbf\xee\x47\xf8\x91\x7e\x54\xcc\x1b\x7e\xf4\xa5\x4b\x64"
        "\x18\xef\x93\xfd\x04\x3f\xd1\xbf\xe5\x27\xf9\xb7\xfd\x64\x3f\xc5\x4f"
        "\xf5\xd3\x7c\x8a\x9f\xee\x67\xf8\x77\xfc\x4c\x3f\xcb\xcf\xf6\xef\xfa"
        "\x39\xfe\x3d\x3f\xd7\xcf\xf3\xf3\xfd\x02\x9f\xea\xdf\xf7\x0b\xfd\x22"
        "\x9f\xe6\x3f\xf0\x8b\xfd\x87\x3e\xdd\x2f\xb9\x74\x53\xd9\xaf\xf4\xab"
        "\xfc\x6a\xbf\xc6\xaf\xf5\xeb\xfc\x7a\xbf\xc1\x6f\xf4\x9b\xfc\x66\xbf"
        "\xc5\x6f\xf5\xdb\xfc\x76\xbf\xc3\xef\xf4\xbb\xfc\x6e\xff\x91\xdf\xe3"
        "\x3f\xf6\x7b\xfd\x27\x7e\x9f\xff\xd4\xef\xf7\x9f\xf9\x03\xfe\x73\x7f"
        "\xd0\x7f\xe1\x33\xfc\x97\xfe\x90\xff\xca\x1f\xf6\x5f\xfb\x23\xfe\x1b"
        "\x7f\xd4\x7f\xeb\x8f\xf9\xe3\xfe\x84\xff\xce\x9f\xf4\xdf\xfb\x53\xfe"
        "\xb4\x3f\xe3\xcf\xfa\x73\xfe\x07\x7f\xde\xff\xe8\x2f\xf0\x77\xd6\x18"
        "\x63\x8c\x31\xc6\xfe\x47\x26\x5c\x5e\x15\xbf\xd5\xde\xfb\x37\x1e\x13"
        "\xff\xb0\x71\x1f\x00\xb8\x7a\x5b\x81\x8c\x7f\x6c\xcf\x9c\x51\xae\xcf"
        "\xfb\xf3\x7a\x3f\x11\xd7\x36\x02\x00\x4f\xf5\xea\xf2\xd0\xa5\xa5\x5a"
        "\xb5\xc4\xc4\xc4\x8b\xdb\xa6\x4b\x08\x8a\xcc\x03\xb8\xf4\x9b\xa0\x4c"
        "\x31\x70\x39\x5e\x02\x6d\xa0\x1d\x24\x40\x6b\x28\xfd\x9b\xe3\xef\x27"
        "\xba\x9d\xa3\x7f\xd1\x7f\xf4\x56\x80\x1c\xff\x90\x13\x0b\x97\xe3\xcb"
        "\xfd\x7f\xf6\x3b\xfd\x3f\xf6\xc4\xa8\x85\xe5\xc2\x33\xb9\xff\x3f\xfd"
        "\xcf\x03\x28\x56\xe4\x72\x4e\x76\xf8\x7b\xfc\xf7\x6f\x57\xb4\x86\x32"
        "\xbf\xd3\x7f\xbe\x96\xff\x62\xfc\xd9\x3f\x4f\x06\x68\xf5\x0f\x39\x39"
        "\xe1\x72\x7c\x79\xfc\xf1\xf0\x38\x3c\x0d\x09\xbf\xd8\x92\x31\xc6\x18"
        "\x63\x8c\x31\xc6\x18\xfb\x59\x3f\x51\xb1\xd3\xa5\xeb\xcf\x4b\x7f\xf1"
        "\xf9\x5b\xd7\xe7\x71\xea\x72\x4e\xe6\x45\xed\xa5\xf8\x5f\x5d\x9f\x33"
        "\xc6\x18\x63\x8c\x31\xc6\x18\x63\xec\xca\x7b\xa6\x5b\xf7\x27\x1f\x4b"
        "\x48\x68\xdd\xe9\x8f\xaf\x54\xf9\x5f\x65\xf1\xca\x7f\xeb\x8a\xf7\x00"
        "\x97\x1e\x51\x00\xf0\x6f\x76\x08\xf0\x1f\x3f\x8a\x2d\xff\x91\x7d\x25"
        "\x5d\x7c\xe9\xfc\x73\xd3\xf2\xb3\x3e\x80\xff\x8e\x52\xfe\x19\x2b\x57"
        "\xf8\x8d\x89\x31\xc6\x18\x63\x8c\x31\xf6\xa7\xbb\x3c\xe9\xff\xe5\xe3"
        "\xea\x4a\x0d\x88\x31\xc6\x18\x63\x8c\x31\xc6\x18\x63\x8c\x31\xc6\x18"
        "\x63\x8c\x31\xc6\x18\x63\x8c\x31\xc6\x18\x63\x8c\x31\xc6\x18\x63\x8c"
        "\x31\xc6\x18\x63\x8c\x31\xc6\x18\xcb\x82\xfe\x13\xff\x4e\xec\x4a\x1f"
        "\x23\x63\x8c\x31\xc6\x18\x63\x8c\x31\xc6\x18\x63\x8c\x31\xc6\x18\x63"
        "\x8c\x31\xc6\x18\x63\x8c\x31\xc6\x18\x63\x8c\x31\xc6\x18\x63\x8c\x31"
        "\xc6\x18\x63\x8c\x31\xc6\x18\x63\x8c\x31\xc6\x18\x63\x8c\x31\x76\xa5"
        "\xfd\xbf\x00\x00\x00\xff\xff\x03\xb7\x0c\x2d",
        5400));
    NONFAILING(
        syz_mount_image(/*fs=*/0x2000000000c0, /*dir=*/0x200000000040,
                        /*flags=MS_RELATIME|MS_NODIRATIME|MS_DIRSYNC*/ 0x200880,
                        /*opts=*/0x200000000000, /*chdir=*/3, /*size=*/0x1518,
                        /*img=*/0x200000006800));
    break;
  case 1:
    //  openat arguments: [
    //    fd: fd_dir (resource)
    //    file: ptr[in, buffer] {
    //      buffer: {2e 00} (length 0x2)
    //    }
    //    flags: open_flags = 0x100 (4 bytes)
    //    mode: open_mode = 0x52 (2 bytes)
    //  ]
    //  returns fd
    NONFAILING(memcpy((void*)0x200000000000, ".\000", 2));
    res = syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x200000000000ul,
                  /*flags=O_NOCTTY*/ 0x100,
                  /*mode=S_IWOTH|S_IWGRP|S_IXUSR*/ 0x52);
    if (res != -1)
      r[0] = res;
    break;
  case 2:
    //  ioctl$FS_IOC_REMOVE_ENCRYPTION_KEY arguments: [
    //    fd: fd_dir (resource)
    //    cmd: const = 0x8004587d (4 bytes)
    //    arg: ptr[inout, fscrypt_remove_key_arg] {
    //      fscrypt_remove_key_arg {
    //        key_spec: union fscrypt_key_specifier {
    //          desc: fscrypt_key_specifier__by_descriptor {
    //            type: const = 0x1 (4 bytes)
    //            reserved: const = 0x0 (4 bytes)
    //            descriptor: union fscrypt_key_descriptor {
    //              desc4: buffer: {85 ba a1 74 f0 cb 11 42} (length 0x8)
    //            }
    //            reserved2: 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} (length 0x18)
    //          }
    //        }
    //        removal_status_flags: int32 = 0x0 (4 bytes)
    //        reserved: buffer: {00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    //        00 00 00 00} (length 0x14)
    //      }
    //    }
    //  ]
    NONFAILING(*(uint32_t*)0x200000000080 = 1);
    NONFAILING(*(uint32_t*)0x200000000084 = 0);
    NONFAILING(memcpy((void*)0x200000000088, "\205\272\241t\360\313\021B", 8));
    NONFAILING(memset((void*)0x200000000090, 0, 24));
    NONFAILING(memset((void*)0x2000000000ac, 0, 20));
    syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0x8004587d,
            /*arg=*/0x200000000080ul);
    break;
  case 3:
    //  syz_mount_image$vfat arguments: [
    //    fs: ptr[in, buffer] {
    //      buffer: {76 66 61 74 00} (length 0x5)
    //    }
    //    dir: ptr[in, buffer] {
    //      buffer: {2e 2f 62 75 73 00} (length 0x6)
    //    }
    //    flags: mount_flags = 0x204b82f (8 bytes)
    //    opts: nil
    //    chdir: int8 = 0x3 (1 bytes)
    //    size: len = 0x0 (8 bytes)
    //    img: ptr[in, buffer] {
    //      buffer: (compressed buffer with length 0x0)
    //    }
    //  ]
    //  returns fd_dir
    NONFAILING(memcpy((void*)0x2000000024c0, "vfat\000", 5));
    NONFAILING(memcpy((void*)0x2000000001c0, "./bus\000", 6));
    NONFAILING(syz_mount_image(
        /*fs=*/0x2000000024c0, /*dir=*/0x2000000001c0,
        /*flags=MS_LAZYTIME|MS_PRIVATE|MS_SILENT|MS_REMOUNT|MS_RDONLY|MS_NOSUID|0x380c*/
        0x204b82f, /*opts=*/0, /*chdir=*/3, /*size=*/0,
        /*img=*/0x200000000240));
    break;
  }
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffffffff000ul, /*len=*/0x1000, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x200000000000ul, /*len=*/0x1000000,
          /*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=*/0x1000, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  setup_sysctl();
  const char* reason;
  (void)reason;
  install_segv_handler();
  use_temporary_dir();
  loop();
  return 0;
}