// https://syzkaller.appspot.com/bug?id=7a185609aa78b2069b780ea42fae8d00029ea41c
// 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 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;
}

//% 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;
}

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");
}

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 < 6; call++) {
    for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0]));
         thread++) {
      struct thread_t* th = &threads[thread];
      if (!th->created) {
        th->created = 1;
        event_init(&th->ready);
        event_init(&th->done);
        event_set(&th->done);
        thread_start(thr, th);
      }
      if (!event_isset(&th->done))
        continue;
      event_reset(&th->done);
      th->call = call;
      __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED);
      event_set(&th->ready);
      if (call == 3)
        break;
      event_timedwait(&th->done, 50 + (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++) {
    reset_loop();
    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[1] = {0xffffffffffffffff};

void execute_call(int call)
{
  intptr_t res = 0;
  switch (call) {
  case 0:
    //  open arguments: [
    //    file: ptr[in, buffer] {
    //      buffer: {2e 2f 62 75 73 00} (length 0x6)
    //    }
    //    flags: open_flags = 0x143142 (8 bytes)
    //    mode: open_mode = 0x45 (8 bytes)
    //  ]
    //  returns fd
    memcpy((void*)0x200000000340, "./bus\000", 6);
    syscall(__NR_open, /*file=*/0x200000000340ul,
            /*flags=O_SYNC|O_NOCTTY|O_NOATIME|O_CREAT|FASYNC|0x2*/ 0x143142ul,
            /*mode=S_IXOTH|S_IROTH|S_IXUSR*/ 0x45ul);
    break;
  case 1:
    //  mount arguments: [
    //    src: ptr[in, blockdev_filename] {
    //      union blockdev_filename {
    //        loop: loop_filename {
    //          prefix: buffer: {2f 64 65 76 2f 6c 6f 6f 70} (length 0x9)
    //          id: proc = 0x0 (1 bytes)
    //          z: const = 0x0 (1 bytes)
    //        }
    //      }
    //    }
    //    dst: ptr[in, buffer] {
    //      buffer: {2e 2f 62 75 73 00} (length 0x6)
    //    }
    //    type: nil
    //    flags: mount_flags = 0x1000 (8 bytes)
    //    data: nil
    //  ]
    memcpy((void*)0x200000000380, "/dev/loop", 9);
    *(uint8_t*)0x200000000389 = 0x30 + procid * 1;
    *(uint8_t*)0x20000000038a = 0;
    memcpy((void*)0x200000000140, "./bus\000", 6);
    syscall(__NR_mount, /*src=*/0x200000000380ul, /*dst=*/0x200000000140ul,
            /*type=*/0ul, /*flags=MS_BIND*/ 0x1000ul, /*data=*/0ul);
    break;
  case 2:
    //  open arguments: [
    //    file: ptr[in, buffer] {
    //      buffer: {2e 2f 62 75 73 00} (length 0x6)
    //    }
    //    flags: open_flags = 0x185502 (8 bytes)
    //    mode: open_mode = 0x28 (8 bytes)
    //  ]
    //  returns fd
    memcpy((void*)0x200000000180, "./bus\000", 6);
    res = syscall(
        __NR_open, /*file=*/0x200000000180ul,
        /*flags=O_SYNC|O_NOCTTY|O_DIRECT|O_CLOEXEC|O_APPEND|0x2*/ 0x185502ul,
        /*mode=S_IXGRP|S_IRGRP*/ 0x28ul);
    if (res != -1)
      r[0] = res;
    break;
  case 3:
    //  syz_mount_image$ext4 arguments: [
    //    fs: ptr[in, buffer] {
    //      buffer: {65 78 74 34 00} (length 0x5)
    //    }
    //    dir: ptr[in, buffer] {
    //      buffer: {2e 2f 66 69 6c 65 31 00} (length 0x8)
    //    }
    //    flags: mount_flags = 0x0 (8 bytes)
    //    opts: ptr[in, fs_options[ext4_options]] {
    //      fs_options[ext4_options] {
    //        elems: array[fs_opt_elem[ext4_options]] {
    //          fs_opt_elem[ext4_options] {
    //            elem: union ext4_options {
    //              jqfmt_vfsv1: buffer: {6a 71 66 6d 74 3d 76 66 73 76 31}
    //              (length 0xb)
    //            }
    //            comma: const = 0x2c (1 bytes)
    //          }
    //          fs_opt_elem[ext4_options] {
    //            elem: union ext4_options {
    //              nobarrier: buffer: {6e 6f 62 61 72 72 69 65 72} (length 0x9)
    //            }
    //            comma: const = 0x2c (1 bytes)
    //          }
    //          fs_opt_elem[ext4_options] {
    //            elem: union ext4_options {
    //              noacl: buffer: {6e 6f 61 63 6c} (length 0x5)
    //            }
    //            comma: const = 0x2c (1 bytes)
    //          }
    //          fs_opt_elem[ext4_options] {
    //            elem: union ext4_options {
    //              data_err_abort: buffer: {64 61 74 61 5f 65 72 72 3d 61 62 6f
    //              72 74} (length 0xe)
    //            }
    //            comma: const = 0x2c (1 bytes)
    //          }
    //          fs_opt_elem[ext4_options] {
    //            elem: union ext4_options {
    //              nodelalloc: buffer: {6e 6f 64 65 6c 61 6c 6c 6f 63} (length
    //              0xa)
    //            }
    //            comma: const = 0x2c (1 bytes)
    //          }
    //          fs_opt_elem[ext4_options] {
    //            elem: union ext4_options {
    //              noquota: buffer: {6e 6f 71 75 6f 74 61} (length 0x7)
    //            }
    //            comma: const = 0x2c (1 bytes)
    //          }
    //          fs_opt_elem[ext4_options] {
    //            elem: union ext4_options {
    //              max_dir_size_kb: fs_opt["max_dir_size_kb", fmt[hex, int32]]
    //              {
    //                name: buffer: {6d 61 78 5f 64 69 72 5f 73 69 7a 65 5f 6b
    //                62} (length 0xf) eq: const = 0x3d (1 bytes) val: int32 =
    //                0x9 (18 bytes)
    //              }
    //            }
    //            comma: const = 0x2c (1 bytes)
    //          }
    //          fs_opt_elem[ext4_options] {
    //            elem: union ext4_options {
    //              grpquota: buffer: {67 72 70 71 75 6f 74 61} (length 0x8)
    //            }
    //            comma: const = 0x2c (1 bytes)
    //          }
    //          fs_opt_elem[ext4_options] {
    //            elem: union ext4_options {
    //              nobh: buffer: {6e 6f 62 68} (length 0x4)
    //            }
    //            comma: const = 0x2c (1 bytes)
    //          }
    //          fs_opt_elem[ext4_options] {
    //            elem: union ext4_options {
    //              user_xattr: buffer: {75 73 65 72 5f 78 61 74 74 72} (length
    //              0xa)
    //            }
    //            comma: const = 0x2c (1 bytes)
    //          }
    //          fs_opt_elem[ext4_options] {
    //            elem: union ext4_options {
    //              bh: buffer: {62 68} (length 0x2)
    //            }
    //            comma: const = 0x2c (1 bytes)
    //          }
    //          fs_opt_elem[ext4_options] {
    //            elem: union ext4_options {
    //              dioread_nolock: buffer: {64 69 6f 72 65 61 64 5f 6e 6f 6c 6f
    //              63 6b} (length 0xe)
    //            }
    //            comma: const = 0x2c (1 bytes)
    //          }
    //        }
    //        common: array[fs_opt_elem[fs_options_common]] {
    //        }
    //        null: const = 0x0 (1 bytes)
    //      }
    //    }
    //    chdir: int8 = 0x1 (1 bytes)
    //    size: len = 0x55e (8 bytes)
    //    img: ptr[in, buffer] {
    //      buffer: (compressed buffer with length 0x55e)
    //    }
    //  ]
    //  returns fd_dir
    memcpy((void*)0x200000000080, "ext4\000", 5);
    memcpy((void*)0x200000000000, "./file1\000", 8);
    memcpy((void*)0x200000000a00, "jqfmt=vfsv1", 11);
    *(uint8_t*)0x200000000a0b = 0x2c;
    memcpy((void*)0x200000000a0c, "nobarrier", 9);
    *(uint8_t*)0x200000000a15 = 0x2c;
    memcpy((void*)0x200000000a16, "noacl", 5);
    *(uint8_t*)0x200000000a1b = 0x2c;
    memcpy((void*)0x200000000a1c, "data_err=abort", 14);
    *(uint8_t*)0x200000000a2a = 0x2c;
    memcpy((void*)0x200000000a2b, "nodelalloc", 10);
    *(uint8_t*)0x200000000a35 = 0x2c;
    memcpy((void*)0x200000000a36, "noquota", 7);
    *(uint8_t*)0x200000000a3d = 0x2c;
    memcpy((void*)0x200000000a3e, "max_dir_size_kb", 15);
    *(uint8_t*)0x200000000a4d = 0x3d;
    sprintf((char*)0x200000000a4e, "0x%016llx", (long long)9);
    *(uint8_t*)0x200000000a60 = 0x2c;
    memcpy((void*)0x200000000a61, "grpquota", 8);
    *(uint8_t*)0x200000000a69 = 0x2c;
    memcpy((void*)0x200000000a6a, "nobh", 4);
    *(uint8_t*)0x200000000a6e = 0x2c;
    memcpy((void*)0x200000000a6f, "user_xattr", 10);
    *(uint8_t*)0x200000000a79 = 0x2c;
    memcpy((void*)0x200000000a7a, "bh", 2);
    *(uint8_t*)0x200000000a7c = 0x2c;
    memcpy((void*)0x200000000a7d, "dioread_nolock", 14);
    *(uint8_t*)0x200000000a8b = 0x2c;
    *(uint8_t*)0x200000000a8c = 0;
    memcpy(
        (void*)0x200000000480,
        "\x78\x9c\xec\xdd\xdf\x6b\x5b\x55\x1c\x00\xf0\xef\x4d\xdb\xfd\xd6\x75"
        "\x30\x86\x8a\x48\x61\x0f\x4e\xe6\xd2\xb5\xf5\xc7\x04\x1f\xe6\xa3\xe8"
        "\x70\xa0\xef\x33\xb4\x77\x65\x34\x5d\x46\x93\x8e\xb5\x0e\xdc\x1e\xdc"
        "\x8b\x2f\x32\x04\x11\x07\xe2\xbb\xbe\xfb\x38\xfc\x07\xfc\x2b\x06\x3a"
        "\x18\x32\x8a\x3e\x88\x10\xb9\xe9\x4d\x97\xad\x49\x9b\x75\xd9\xd2\x35"
        "\x9f\x0f\xdc\x72\x4e\xee\x4d\xce\xf9\xe6\xde\xef\xe9\xb9\xb9\x37\x24"
        "\x80\x81\x35\x96\xfd\x29\x44\xbc\x1c\x11\xdf\x24\x11\x07\x23\x22\xc9"
        "\xd7\x0d\x47\xbe\x72\x6c\x75\xbb\x95\xfb\x57\xa7\xb3\x25\x89\x7a\xfd"
        "\xd3\xbf\x92\xc6\x76\x59\xbd\xf9\x5a\xcd\xe7\xed\xcf\x2b\x2f\x45\xc4"
        "\x6f\x5f\x45\x1c\x2f\xac\x6f\xb7\xba\xb4\x3c\x57\x2a\x97\xd3\x85\xbc"
        "\x3e\x5e\x9b\xbf\x34\x5e\x5d\x5a\x3e\x71\x61\xbe\x34\x9b\xce\xa6\x17"
        "\x27\xa7\xa6\x4e\xbd\x3d\x35\xf9\xde\xbb\xef\xf4\x2c\xd6\x37\xce\xfe"
        "\xf3\xfd\x27\xb7\x3f\x3c\xf5\xf5\xd1\x95\xef\x7e\xb9\x7b\xe8\x66\x12"
        "\xa7\xe3\x40\xbe\xae\x35\x8e\x27\x70\xad\xb5\x32\x16\x63\xf9\x7b\x32"
        "\x12\xa7\x1f\xd9\x70\xa2\x07\x8d\x6d\x27\x49\xbf\x3b\xc0\x96\x0c\xe5"
        "\x79\x3e\x12\xd9\x18\x70\x30\x86\xf2\xac\x07\x76\xbe\x2f\x23\xa2\x0e"
        "\x0c\xa8\x44\xfe\xc3\x80\x6a\xce\x03\x9a\xe7\xf6\x3d\x3a\x0f\x7e\x6e"
        "\xdc\xfb\x60\xf5\x04\x68\x7d\xfc\xc3\xab\x9f\x8d\xc4\x9e\xc6\xb9\xd1"
        "\xbe\x95\xe4\xa1\x33\xa3\xec\x7c\x77\xb4\x07\xed\x67\x6d\xfc\xfa\xe7"
        "\xad\x9b\xd9\x12\xbd\xfb\x1c\x02\x60\x53\xd7\xae\x47\xc4\xc9\xe1\xe1"
        "\xf5\xe3\x5f\x92\x8f\x7f\x5b\x77\xb2\x8b\x6d\x1e\x6d\xc3\xf8\x07\xcf"
        "\xce\xed\x6c\xfe\xf3\x66\xbb\xf9\x4f\x61\x6d\xfe\x13\x6d\xe6\x3f\xfb"
        "\xdb\xe4\xee\x56\x6c\x9e\xff\x85\xbb\x3d\x68\xa6\xa3\x6c\xfe\xf7\x7e"
        "\xdb\xf9\xef\xda\x45\xab\xd1\xa1\xbc\xf6\x42\x63\xce\x37\x92\x9c\xbf"
        "\x50\x4e\xb3\xb1\xed\xc5\x88\x38\x16\x23\xbb\xb3\xfa\x46\xd7\x73\x4e"
        "\xad\xdc\xa9\x77\x5a\xd7\x3a\xff\xcb\x96\xac\xfd\xe6\x5c\x30\xef\xc7"
        "\xdd\xe1\xdd\x0f\x3f\x67\xa6\x54\x2b\x3d\x49\xcc\xad\xee\x5d\x8f\x78"
        "\xa5\xed\xfc\x37\x59\xdb\xff\x49\x9b\xfd\x9f\xbd\x1f\x67\xbb\x6c\xe3"
        "\x48\x7a\xeb\xb5\x4e\xeb\x36\x8f\xff\xe9\xaa\xff\x14\xf1\x7a\xdb\xfd"
        "\xff\xe0\x8a\x56\xb2\xf1\xf5\xc9\xf1\xc6\xf1\x30\xde\x3c\x2a\xd6\xfb"
        "\xfb\xc6\x91\xdf\x3b\xb5\xdf\xef\xf8\xb3\xfd\xbf\x6f\xe3\xf8\x47\x93"
        "\xd6\xeb\xb5\xd5\xc7\x6f\xe3\xc7\x3d\xff\xa6\x9d\xd6\x3d\x14\x7f\x74"
        "\x7f\xfc\xef\x4a\x3e\x6b\x94\x77\xe5\x8f\x5d\x29\xd5\x6a\x0b\x13\x11"
        "\xbb\x92\x8f\xd7\x3f\x3e\xf9\xe0\xb9\xcd\x7a\x73\xfb\x2c\xfe\x63\x47"
        "\x37\x1e\xff\xda\x1d\xff\x7b\x23\xe2\xf3\x2e\xe3\xbf\x71\xf8\xe7\x57"
        "\xbb\x8a\xbf\x4f\xfb\x7f\xe6\xb1\xf6\xff\xe3\x17\xee\x7c\xf4\xc5\x0f"
        "\x9d\xda\xef\x6e\xfc\x7b\xab\x51\x3a\x96\x3f\xd2\xcd\xf8\xd7\x6d\x07"
        "\x9f\xe4\xbd\x03\x00\x00\x00\x00\x00\x80\xed\xa6\x10\x11\x07\x22\x29"
        "\x14\xd7\xca\x85\x42\xb1\xb8\x7a\x7f\xc7\xe1\xd8\x57\x28\x57\xaa\xb5"
        "\xe3\xe7\x2b\x8b\x17\x67\xa2\xf1\x5d\xd9\xd1\x18\x29\x34\xaf\x74\x1f"
        "\x6c\xb9\x1f\x62\x22\xbf\x1f\xb6\x59\x9f\x7c\xa4\x3e\x15\x11\x87\x22"
        "\xe2\xdb\xa1\xbd\x8d\x7a\x71\xba\x52\x9e\xe9\x77\xf0\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xb0\x4d\xec\xef\xf0\xfd"
        "\xff\xcc\x1f\x43\xfd\xee\x1d\xf0\xd4\xf9\xc9\x6f\x18\x5c\x9b\xe6\x7f"
        "\x2f\x7e\xe9\x09\xd8\x96\xfc\xff\x87\xc1\x25\xff\x61\x70\xc9\x7f\x18"
        "\x5c\xf2\x1f\x06\x97\xfc\x87\xc1\x25\xff\x61\x70\xc9\x7f\x18\x58\xff"
        "\xd5\xeb\xf5\x7e\xf7\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x76\x92\xb3\x67\xce\x64\x4b"
        "\x7d\xe5\xfe\xd5\xe9\xac\x3e\x73\x79\x69\x71\xae\x72\xf9\xc4\x4c\x5a"
        "\x9d\x2b\xce\x2f\x4e\x17\xa7\x2b\x0b\x97\x8a\xb3\x95\xca\x6c\x39\x2d"
        "\x4e\x57\xe6\x37\x7b\xbd\x72\xa5\x72\x69\x62\x32\x16\xaf\x8c\xd7\xd2"
        "\x6a\x6d\xbc\xba\xb4\x7c\x6e\xbe\xb2\x78\xb1\x76\xee\xc2\x7c\x69\x36"
        "\x3d\x97\x8e\x3c\x93\xa8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\xe0\xf9\x52\x5d\x5a\x9e\x2b\x95\xcb\xe9\x82\x82\xc2"
        "\x96\x0a\xc3\xdb\xa3\x1b\x3b\xae\x90\xe4\x19\xda\xaf\x6e\xf4\x79\x60"
        "\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x80\x16\xff\x07\x00\x00\xff\xff\x20\xed\x38\x31",
        1374);
    syz_mount_image(/*fs=*/0x200000000080, /*dir=*/0x200000000000, /*flags=*/0,
                    /*opts=*/0x200000000a00, /*chdir=*/1, /*size=*/0x55e,
                    /*img=*/0x200000000480);
    break;
  case 4:
    //  mmap arguments: [
    //    addr: VMA[0xb36000]
    //    len: len = 0xb36000 (8 bytes)
    //    prot: mmap_prot = 0x2 (8 bytes)
    //    flags: mmap_flags = 0x28011 (8 bytes)
    //    fd: fd (resource)
    //    offset: intptr = 0x0 (8 bytes)
    //  ]
    syscall(__NR_mmap, /*addr=*/0x200000000000ul, /*len=*/0xb36000ul,
            /*prot=PROT_WRITE*/ 2ul,
            /*flags=MAP_STACK|MAP_POPULATE|MAP_FIXED|MAP_SHARED*/ 0x28011ul,
            /*fd=*/r[0], /*offset=*/0ul);
    break;
  case 5:
    //  ioctl$KVM_SET_USER_MEMORY_REGION arguments: [
    //    fd: fd_kvmvm (resource)
    //    cmd: const = 0x4020ae46 (4 bytes)
    //    arg: ptr[in, kvm_userspace_memory_region] {
    //      kvm_userspace_memory_region {
    //        slot: kvm_mem_slots = 0x0 (4 bytes)
    //        flags: kvm_mem_region_flags = 0x0 (4 bytes)
    //        paddr: kvm_guest_addrs = 0x0 (8 bytes)
    //        size: len = 0x20002000 (8 bytes)
    //        addr: VMA[0x2000]
    //      }
    //    }
    //  ]
    *(uint32_t*)0x200000000400 = 0;
    *(uint32_t*)0x200000000404 = 0;
    *(uint64_t*)0x200000000408 = 0;
    *(uint64_t*)0x200000000410 = 0x20002000;
    *(uint64_t*)0x200000000418 = 0x200000000000;
    syscall(__NR_ioctl, /*fd=*/(intptr_t)-1, /*cmd=*/0x4020ae46,
            /*arg=*/0x200000000400ul);
    break;
  }
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffffffff000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x200000000000ul, /*len=*/0x1000000ul,
          /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x200001000000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  const char* reason;
  (void)reason;
  for (procid = 0; procid < 5; procid++) {
    if (fork() == 0) {
      loop();
    }
  }
  sleep(1000000);
  return 0;
}