// https://syzkaller.appspot.com/bug?id=b37bf8e5da1b95b09b4b8a79629f6978601fd2af
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <dirent.h>
#include <endian.h>
#include <errno.h>
#include <fcntl.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/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 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, 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 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, loopfd = -1, 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) {
    memset(loopname, 0, sizeof(loopname));
    snprintf(loopname, sizeof(loopname), "/dev/loop%llu", procid);
    if (setup_loop_device(data, size, loopname, &loopfd) == -1)
      return -1;
    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");
  }
  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) {
    ioctl(loopfd, LOOP_CLR_FD, 0);
    close(loopfd);
  }
  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");
}

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 (;;) {
      if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid)
        break;
      sleep_ms(1);
      if (current_time_ms() - start < 5000)
        continue;
      kill_and_wait(pid, &status);
      break;
    }
  }
}

void execute_one(void)
{
  NONFAILING(memcpy((void*)0x20000000, "ext2\000", 5));
  NONFAILING(memcpy((void*)0x20000500, "./file0\000", 8));
  NONFAILING(*(uint16_t*)0x20000080 = -1);
  NONFAILING(*(uint16_t*)0x20000082 = -1);
  NONFAILING(memcpy(
      (void*)0x20000540,
      "\x78\x9c\xec\xdd\x4f\x6f\x1b\x69\x19\x00\xf0\x67\x9c\x78\x49\xb7\x59\x92"
      "\x05\x0e\xcb\x4a\xbb\xac\xd8\x45\xe9\x0a\x6a\x27\x1b\xda\x46\x1c\xda\x22"
      "\x21\x6e\x95\x40\xe5\x5e\xa2\xc4\x89\xa2\x38\x71\x14\x3b\x6d\x13\x55\x28"
      "\x15\x1f\x00\x09\x21\xa8\xc4\x89\x13\x17\x24\x3e\x00\x12\xea\x47\x40\x95"
      "\x2a\xd1\x3b\x02\x04\x42\xd0\xc2\x81\x03\x30\x68\xc6\x93\x36\xb1\xec\x26"
      "\xd5\xc6\x76\xe5\xfc\x7e\xd2\xeb\x79\x67\xec\x99\xe7\x79\xed\x78\x3c\x7f"
      "\xde\xcc\x04\x70\x66\x7d\x10\x11\xd7\x23\x62\x2c\x22\x3e\x8e\x88\xa9\x62"
      "\x7a\xa9\x28\xb1\xdf\x2e\xd9\xeb\x9e\x3d\xbd\xb7\x94\x95\x24\xd2\xf4\xe6"
      "\xdf\x93\x7c\x9e\x6c\x3c\x22\x92\xc3\xcb\x3c\x5f\xcc\x36\xd1\x1e\x74\xd5"
      "\xdc\xdd\x5b\x5f\xac\xd7\x6b\xdb\xc5\x78\xb5\xb5\xb1\x55\x6d\xee\xee\x5d"
      "\x5c\xdb\x58\x5c\xad\xad\xd6\x36\xe7\xe7\xe7\x2e\x2f\x5c\x59\xb8\xb4\x30"
      "\x7b\x2a\xed\xcc\xda\x75\xf5\x5b\x7f\xfe\xe9\x8f\x7e\xf9\xed\xab\xbf\xfd"
      "\xda\x9d\x3f\xdc\xfa\xeb\x85\x1f\x64\x49\x4f\x16\xcf\x17\xed\x38\x75\x4f"
      "\xf2\xc7\x72\xf6\x5e\x3c\x37\x1e\x11\xdb\xfd\x08\x36\x04\x63\x45\x7b\xca"
      "\xc3\x4e\x04\x00\x80\x13\xa9\x44\xc4\xe7\x22\xe2\xcb\xf9\xf6\xff\x54\x8c"
      "\xe5\x5b\x73\x39\x9b\x74\x00\x00\x00\x30\x22\xd2\x6b\x93\xf1\x9f\x24\x22"
      "\x05\x00\x00\x00\x46\xd6\xb5\xbc\x0f\x6c\x52\xaa\x14\xfd\x7d\x27\xa3\x54"
      "\xaa\x54\xda\x7d\x78\xbf\x10\x6f\x96\xea\x8d\x66\xeb\xab\x2b\x8d\x9d\xcd"
      "\xe5\x76\x5f\xd9\xe9\x28\x97\x56\xd6\xea\xb5\xd9\xa2\x4f\xed\x74\x94\x93"
      "\x6c\x7c\x2e\xaf\xbf\x18\xff\xa4\x63\x7c\x3e\x22\xde\x8e\x88\x9f\x4c\x9d"
      "\xcb\xc7\x2b\x4b\x8d\xfa\xf2\xb0\x0f\x7e\x00\x00\x00\xc0\x19\x71\xbe\x63"
      "\xff\xff\x5f\x53\xed\xfd\x7f\x00\x00\x00\x60\xc4\x4c\x0f\x3b\x01\x00\x00"
      "\x00\xa0\xef\x7a\xed\xff\x27\x03\xce\x03\x00\x00\x00\xe8\x1f\xe7\xff\x01"
      "\x00\x00\x60\xa4\x7d\xe7\xc6\x8d\xac\xa4\x07\xf7\xbf\x5e\xbe\xbd\xbb\xb3"
      "\xde\xb8\x7d\x71\xb9\xd6\x5c\xaf\x6c\xec\x2c\x55\x96\x1a\xdb\x5b\x95\xd5"
      "\x46\x63\x35\xbf\x66\xdf\xc6\x71\xcb\xab\x37\x1a\x5b\x5f\x8f\xcd\x9d\xbb"
      "\xd5\x56\xad\xd9\xaa\x36\x77\xf7\x6e\x6d\x34\x76\x36\x5b\xb7\xd6\x8e\xdc"
      "\x02\x1b\x00\x00\x00\x18\xa0\xb7\xbf\xf4\xf0\x49\x12\x11\xfb\xdf\x38\x97"
      "\x97\xcc\x1b\xd9\xc3\x58\x8f\x19\xf4\x15\x80\x91\x51\x7a\x95\x17\xff\xa9"
      "\x7f\x79\x00\x83\xd7\xeb\x67\x1e\x18\x7d\xe3\xc3\x4e\x00\x18\x9e\xfd\x61"
      "\x27\x00\x0c\xdb\x91\x4b\x7d\x74\xd9\x28\x38\xdc\x79\xe7\xc8\x31\x83\xdf"
      "\xf5\x2f\x27\x00\x00\xe0\x74\xcd\x7c\xb1\xfb\xf9\xff\x6c\x17\xa0\x3c\xec"
      "\xe4\x80\xbe\x7a\xa5\xf3\xff\xc0\x48\x71\xfe\x1f\xce\xae\x57\x3c\xff\xff"
      "\xa8\x5f\x79\x00\x83\x57\xb6\x05\x00\x67\xde\x71\xb7\xfa\xe8\x79\xf1\x8e"
      "\x13\x9f\xff\x4f\xd3\x63\x97\x05\x00\x00\xf4\xd5\x64\x5e\x92\x52\xa5\x38"
      "\x17\x38\x19\xa5\x52\xa5\x12\xf1\x56\xfe\xaf\xfe\xe5\x64\x65\xad\x5e\x9b"
      "\x8d\x88\xcf\x46\xc4\xef\xa7\xca\x9f\xc9\xc6\xe7\xf2\x39\x13\xb7\x07\x04"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x80\x13\x4a\xd3\x24\x52\x00\x00\x00\x60\xa4\x45\x94\xfe\x92\x14\xf7\xff"
      "\x9a\x99\xfa\x68\xb2\xf3\xf8\xc0\x1b\xc9\xbf\xa7\xf2\x61\x44\xdc\xf9\xf9"
      "\xcd\x9f\xdd\x5d\x6c\xb5\xb6\xe7\xb2\xe9\xff\x78\x3e\xbd\xf5\xa0\x98\xfe"
      "\xc9\x30\x8e\x60\x00\x00\x00\x00\x9d\x0e\xf6\xd3\x0f\xf6\xe3\x01\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xe0\x34"
      "\x3d\x7b\x7a\x6f\xe9\xa0\x0c\x32\xee\xdf\xbe\x19\x11\xd3\xdd\xe2\x8f\xc7"
      "\x44\x3e\x9c\x88\x72\x44\xbc\xf9\xcf\x24\xc6\x0f\xcd\x97\x44\xc4\xd8\x29"
      "\xc4\xdf\xbf\x1f\x11\xef\x74\x8b\x9f\x64\x69\xc5\x74\x91\x45\x67\xfc\x52"
      "\x44\x9c\x1b\x4c\xfc\xf7\xd2\x34\xed\x1a\xff\xfc\x29\xc4\x87\xb3\xec\x61"
      "\xb6\xfe\xb9\xde\xed\xfb\x57\x8a\x0f\xf2\x61\xf7\xef\xff\x78\x51\x3e\xad"
      "\xde\xeb\xbf\xd2\xf3\xf5\xdf\x58\x8f\xf5\xdf\x5b\x27\x8c\xf1\xee\xe3\x5f"
      "\x57\x7b\xc6\xbf\x1f\xf1\xee\x78\xf7\xf5\xcf\x41\xfc\xa4\x47\xfc\x0f\xbb"
      "\x2d\xb0\xcb\x9b\xf2\xfd\xef\xed\xed\xf5\x8a\x9f\xfe\x22\x62\xa6\xeb\xef"
      "\x4f\x72\x24\x56\xb5\xb5\xb1\x55\x6d\xee\xee\x5d\x5c\xdb\x58\x5c\xad\xad"
      "\xd6\x36\xe7\xe7\xe7\x2e\x2f\x5c\x59\xb8\xb4\x30\x5b\x5d\x59\xab\xd7\x8a"
      "\xc7\xae\x31\x7e\xfc\xde\x6f\xfe\xd7\x31\xe9\xbf\x69\x5b\xde\xfe\xe8\x11"
      "\x7f\xfa\x98\xf6\x7f\x94\x55\xca\x87\x1b\xd3\x19\xa6\x08\xf6\xf8\xee\xd3"
      "\xcf\xb7\xab\xe5\x8e\x45\xe4\xf1\x2f\x7c\xd8\xfd\xf3\x7f\xe7\x25\xf1\xb3"
      "\xbf\x89\xaf\x14\xbf\x03\xd9\xf3\x33\x07\xf5\xfd\x76\xfd\xb0\xf7\x7f\xf5"
      "\xe8\xfd\xae\x89\x15\xf1\x97\x7b\xb4\xff\xb8\xcf\xff\x42\xaf\x85\x76\xf8"
      "\xf8\xbb\x3f\xfc\xe3\x09\x5f\x0a\x00\x0c\x40\x73\x77\x6f\x7d\xb1\x5e\xaf"
      "\x6d\xf7\xbd\xf2\x20\x4d\xd3\x41\xc5\x52\x79\x0d\x2b\x13\xaf\x47\x1a\x2a"
      "\xc7\x57\x4e\xe3\xc8\x16\x00\x00\xf0\xba\x79\xb1\xd1\x3f\xec\x4c\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xe0\xec\x6a\xee\x46"
      "\xa9\xdf\x97\x13\xeb\x8c\xb9\x3f\x9c\xa6\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\xbc\xd4\xff"
      "\x03\x00\x00\xff\xff\x41\xf1\xe3\x56",
      1269));
  NONFAILING(syz_mount_image(/*fs=*/0x20000000, /*dir=*/0x20000500,
                             /*flags=*/0x21000e, /*opts=*/0x20000080,
                             /*chdir=*/1, /*size=*/0x4f5, /*img=*/0x20000540));
  NONFAILING(memcpy((void*)0x20000000, "ext4\000", 5));
  NONFAILING(memcpy((void*)0x20000100, "./file0\000", 8));
  NONFAILING(syz_mount_image(/*fs=*/0x20000000, /*dir=*/0x20000100, /*flags=*/0,
                             /*opts=*/0, /*chdir=*/0, /*size=*/0,
                             /*img=*/0x20000000));
  NONFAILING(memcpy((void*)0x20000640, "/dev/loop", 9));
  NONFAILING(*(uint8_t*)0x20000649 = 0x30);
  NONFAILING(*(uint8_t*)0x2000064a = 0);
  NONFAILING(memcpy((void*)0x200006c0, "./file0\000", 8));
  NONFAILING(memcpy((void*)0x200001c0, "ext4\000", 5));
  syscall(__NR_mount, /*src=*/0x20000640ul, /*dst=*/0x200006c0ul,
          /*type=*/0x200001c0ul, /*flags=*/0x3f000000ul, /*data=*/0ul);
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=*/0x32ul, /*fd=*/-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0x1000000ul, /*prot=*/7ul,
          /*flags=*/0x32ul, /*fd=*/-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x21000000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=*/0x32ul, /*fd=*/-1, /*offset=*/0ul);
  install_segv_handler();
  loop();
  return 0;
}