// https://syzkaller.appspot.com/bug?id=f32b917d64bf4d45721b424a08e7eea72cbbe34f
// 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
#ifndef __NR_statx
#define __NR_statx 332
#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 bool write_file(const char* file, const char* what, ...)
{
  char buf[1024];
  va_list args;
  va_start(args, what);
  vsnprintf(buf, sizeof(buf), what, args);
  va_end(args);
  buf[sizeof(buf) - 1] = 0;
  int len = strlen(buf);
  int fd = open(file, O_WRONLY | O_CLOEXEC);
  if (fd == -1)
    return false;
  if (write(fd, buf, len) != len) {
    int err = errno;
    close(fd);
    errno = err;
    return false;
  }
  close(fd);
  return true;
}

static long syz_open_procfs(volatile long a0, volatile long a1)
{
  char buf[128];
  memset(buf, 0, sizeof(buf));
  if (a0 == 0) {
    snprintf(buf, sizeof(buf), "/proc/self/%s", (char*)a1);
  } else if (a0 == -1) {
    snprintf(buf, sizeof(buf), "/proc/thread-self/%s", (char*)a1);
  } else {
    snprintf(buf, sizeof(buf), "/proc/self/task/%d/%s", (int)a0, (char*)a1);
  }
  int fd = open(buf, O_RDWR);
  if (fd == -1)
    fd = open(buf, O_RDONLY);
  return fd;
}

//% 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,
                             unsigned long extra_space, 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;
  }
  if (extra_space) {
    off_t cur = lseek(memfd, 0, SEEK_END);
    if (cur >= 0 && ftruncate(memfd, cur + extra_space)) {
    }
  }
  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_RDONLY);
  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);
    unsigned long extra_space = strncmp(fs, "ext", 3) == 0 ? (16 << 20) : 0;
    if (setup_loop_device(data, size, extra_space, 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) {
    if (chdir(target) == -1) {
      err = errno;
      close(res);
      res = -1;
    }
  }

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_RDONLY);
  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 (;;) {
      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_one(void)
{
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  syz_mount_image$squashfs arguments: [
  //    fs: ptr[in, buffer] {
  //      buffer: {73 71 75 61 73 68 66 73 00} (length 0x9)
  //    }
  //    dir: ptr[in, buffer] {
  //      buffer: {2e 2f 66 69 6c 65 31 00} (length 0x8)
  //    }
  //    flags: mount_flags = 0x2000000 (8 bytes)
  //    opts: ptr[inout, array[ANYUNION]] {
  //      array[ANYUNION] {
  //        union ANYUNION {
  //          ANYRES64: ANYRES64 (resource)
  //        }
  //        union ANYUNION {
  //          ANYRES16: ANYRES16 (resource)
  //        }
  //        union ANYUNION {
  //          ANYBLOB: buffer: {94 89 36 ee d3 28 31 d0 6f d0 34 e3 19 9e a2 b2
  //          6b f1 c7 cd 04 b1 62 d8 87 13 d4 d0 84 b0 16 0a 42 98 3e dd f8 57
  //          09 9d 0e 42 ab 60 a1 24 76 dc b8 7d d8 59 8b 61 57 d6 cd 80 36 35
  //          7f 4e e8 3d 25 e8 14 a8 87 1d 7c bf 63 03 9c 61 da 92 75 0b 32 6b
  //          19 c8 70 a0 9e bf 1f 75 12 7c b8 31 1a 8f e5 05 26 4a be 55 ec 81
  //          68 a2 c3 c9 fc 5f 07 d1 58 0d 6f ce 8a 18 e3 08 ba 6e 64 aa 7e aa
  //          fc f1 a5 e2 1c c8 ce 87 d8 f2 14 d7 a8 40 86 0c 0a 9e b2 30 80 1a
  //          45 9d 40 dd 3a c6 4a d5 28 ce 82 76 ec 54 4d 2a 5a ee 66 53 71 49
  //          91 be 8d 17 18 c5 78 1c d0 96 af 85 9a 03 f0 5e f7 c2 dd 35 68 68
  //          87 d9 c1 19 93 64 f5 1f 14 c8 15 ce 6c e2 95 0c fa 68 24 f5 f4 cb
  //          4a 27 ec 25 2c f9 fa 54 9c ff 35 1f c9 bf 07 01 48 8d e3 a1 ab 1c
  //          60 9e 75 01 a1 72 ab eb ac b7 ec 0b e1 c9 1e 62 d0 ae 6c 93 13 07
  //          9b 8a 7c be 14 ec 6b 2b 19 6a 1e d7 0b 02 8d be 7d ae 48 44 6a 06
  //          d2 aa da 1a 7b 96 32 40 c1 a5 ae e0 b6 c9 00 48 7c 4d e7 38 ba 42
  //          bd 7b c7 6c 9f af 42 92 f6 ae 26 91 2b a7 b4 78 e0 21 6e 87 1a 3d
  //          f9 b7 1a 57 95 96 31 3a f7 a1 40 c4 75 e0 c9 dd 62 be 4d 1e 83 05
  //          f3 fe 09 4d 24 1e 98 e9 5d 48 7d 8b ca 85 e1 92 af 9a 7e 6d 3d 2a
  //          b9 22 10 98 78 3d 2b ca e4 32 38 e6 3e 42 6b 15 e0 a4 e8 31 b2 a6
  //          1e 10 87 8b 9c c2 02 9f cd 44 1c ad f4 1a 57 03 7b c1 ae 94 45 85
  //          03 4d 6a 19 3d d4 ce e6 ab 41 b1 a7 ec fd bb 1a e6 26 d6 a1 58 dd
  //          c8 dd 6f 27 48 89 05 95 2f 2e 46 8a ed 79 43 1e 6d 18 1f 7a 73 35
  //          62 9b e7 f0 b2 68 08 d6 0e 1f 24 16 60 09 25 77 ae 1c ca 8c 72 d1
  //          55 b8 57 0d d3 c7 f4 d9 73 56 85 9b 7c f7 d1 0c ca ec 02 a6 0f 57
  //          16 4a a8 17 d9 0a d0 71 e4 fa 2e b6 7e db a2 cd d2 76 e2 b6 17 12
  //          ff 41 de e1 1b 2b f4 51 91 3f c1 18 ce 70 d0 19 de de fc 54 25}
  //          (length 0x21f)
  //        }
  //        union ANYUNION {
  //          ANYRESOCT: ANYRES64 (resource)
  //        }
  //        union ANYUNION {
  //          ANYRES8: ANYRES8 (resource)
  //        }
  //        union ANYUNION {
  //          ANYRESOCT: ANYRES64 (resource)
  //        }
  //      }
  //    }
  //    chdir: int8 = 0x1 (1 bytes)
  //    size: len = 0x184 (8 bytes)
  //    img: ptr[in, buffer] {
  //      buffer: (compressed buffer with length 0x184)
  //    }
  //  ]
  //  returns fd_dir
  memcpy((void*)0x200000000040, "squashfs\000", 9);
  memcpy((void*)0x200000000180, "./file1\000", 8);
  *(uint64_t*)0x20000001fc80 = 0;
  *(uint16_t*)0x20000001fc88 = 0;
  memcpy(
      (void*)0x20000001fc8a,
      "\x94\x89\x36\xee\xd3\x28\x31\xd0\x6f\xd0\x34\xe3\x19\x9e\xa2\xb2\x6b\xf1"
      "\xc7\xcd\x04\xb1\x62\xd8\x87\x13\xd4\xd0\x84\xb0\x16\x0a\x42\x98\x3e\xdd"
      "\xf8\x57\x09\x9d\x0e\x42\xab\x60\xa1\x24\x76\xdc\xb8\x7d\xd8\x59\x8b\x61"
      "\x57\xd6\xcd\x80\x36\x35\x7f\x4e\xe8\x3d\x25\xe8\x14\xa8\x87\x1d\x7c\xbf"
      "\x63\x03\x9c\x61\xda\x92\x75\x0b\x32\x6b\x19\xc8\x70\xa0\x9e\xbf\x1f\x75"
      "\x12\x7c\xb8\x31\x1a\x8f\xe5\x05\x26\x4a\xbe\x55\xec\x81\x68\xa2\xc3\xc9"
      "\xfc\x5f\x07\xd1\x58\x0d\x6f\xce\x8a\x18\xe3\x08\xba\x6e\x64\xaa\x7e\xaa"
      "\xfc\xf1\xa5\xe2\x1c\xc8\xce\x87\xd8\xf2\x14\xd7\xa8\x40\x86\x0c\x0a\x9e"
      "\xb2\x30\x80\x1a\x45\x9d\x40\xdd\x3a\xc6\x4a\xd5\x28\xce\x82\x76\xec\x54"
      "\x4d\x2a\x5a\xee\x66\x53\x71\x49\x91\xbe\x8d\x17\x18\xc5\x78\x1c\xd0\x96"
      "\xaf\x85\x9a\x03\xf0\x5e\xf7\xc2\xdd\x35\x68\x68\x87\xd9\xc1\x19\x93\x64"
      "\xf5\x1f\x14\xc8\x15\xce\x6c\xe2\x95\x0c\xfa\x68\x24\xf5\xf4\xcb\x4a\x27"
      "\xec\x25\x2c\xf9\xfa\x54\x9c\xff\x35\x1f\xc9\xbf\x07\x01\x48\x8d\xe3\xa1"
      "\xab\x1c\x60\x9e\x75\x01\xa1\x72\xab\xeb\xac\xb7\xec\x0b\xe1\xc9\x1e\x62"
      "\xd0\xae\x6c\x93\x13\x07\x9b\x8a\x7c\xbe\x14\xec\x6b\x2b\x19\x6a\x1e\xd7"
      "\x0b\x02\x8d\xbe\x7d\xae\x48\x44\x6a\x06\xd2\xaa\xda\x1a\x7b\x96\x32\x40"
      "\xc1\xa5\xae\xe0\xb6\xc9\x00\x48\x7c\x4d\xe7\x38\xba\x42\xbd\x7b\xc7\x6c"
      "\x9f\xaf\x42\x92\xf6\xae\x26\x91\x2b\xa7\xb4\x78\xe0\x21\x6e\x87\x1a\x3d"
      "\xf9\xb7\x1a\x57\x95\x96\x31\x3a\xf7\xa1\x40\xc4\x75\xe0\xc9\xdd\x62\xbe"
      "\x4d\x1e\x83\x05\xf3\xfe\x09\x4d\x24\x1e\x98\xe9\x5d\x48\x7d\x8b\xca\x85"
      "\xe1\x92\xaf\x9a\x7e\x6d\x3d\x2a\xb9\x22\x10\x98\x78\x3d\x2b\xca\xe4\x32"
      "\x38\xe6\x3e\x42\x6b\x15\xe0\xa4\xe8\x31\xb2\xa6\x1e\x10\x87\x8b\x9c\xc2"
      "\x02\x9f\xcd\x44\x1c\xad\xf4\x1a\x57\x03\x7b\xc1\xae\x94\x45\x85\x03\x4d"
      "\x6a\x19\x3d\xd4\xce\xe6\xab\x41\xb1\xa7\xec\xfd\xbb\x1a\xe6\x26\xd6\xa1"
      "\x58\xdd\xc8\xdd\x6f\x27\x48\x89\x05\x95\x2f\x2e\x46\x8a\xed\x79\x43\x1e"
      "\x6d\x18\x1f\x7a\x73\x35\x62\x9b\xe7\xf0\xb2\x68\x08\xd6\x0e\x1f\x24\x16"
      "\x60\x09\x25\x77\xae\x1c\xca\x8c\x72\xd1\x55\xb8\x57\x0d\xd3\xc7\xf4\xd9"
      "\x73\x56\x85\x9b\x7c\xf7\xd1\x0c\xca\xec\x02\xa6\x0f\x57\x16\x4a\xa8\x17"
      "\xd9\x0a\xd0\x71\xe4\xfa\x2e\xb6\x7e\xdb\xa2\xcd\xd2\x76\xe2\xb6\x17\x12"
      "\xff\x41\xde\xe1\x1b\x2b\xf4\x51\x91\x3f\xc1\x18\xce\x70\xd0\x19\xde\xde"
      "\xfc\x54\x25",
      543);
  sprintf((char*)0x20000001fea9, "%023llo", (long long)-1);
  *(uint8_t*)0x20000001fec0 = -1;
  sprintf((char*)0x20000001fec1, "%023llo", (long long)-1);
  memcpy(
      (void*)0x20000001ff00,
      "\x78\x9c\xec\x90\xbf\x4e\x2a\x41\x14\xc6\xbf\xd9\x5d\xf6\xc2\x2d\x6e\x2e"
      "\xc9\xad\x68\x20\xb9\x46\xb1\x50\x96\x45\x8d\xb1\xd1\x12\x7b\x1f\x40\x02"
      "\x2b\x12\x17\xff\xb0\x24\x02\xa1\x58\x62\x0c\x85\x85\xb1\xf4\x09\x78\x0d"
      "\x13\x5f\x40\x0b\x43\xac\xe9\x4c\x28\xa8\xac\x0c\x66\x76\xce\x0e\xc3\x33"
      "\x38\xbf\x62\xbf\x9d\x73\xbe\x73\xe6\x9c\x39\x0d\xae\x82\x5f\x00\xbe\x66"
      "\xfd\x2a\x0e\x10\x61\xe2\x0f\x5e\x19\x83\x05\x20\xcb\x44\x6c\x6a\x08\x7d"
      "\x20\x7d\x23\xbd\x17\x82\x17\xf2\x1d\x52\xfc\x86\x34\x13\x74\x7b\x67\x15"
      "\xdf\xf7\x5a\xb9\xbd\x1c\xd2\x8b\xc0\x9c\x7d\xce\x05\x80\xf4\x04\xfb\x03"
      "\x03\xd3\xa8\xd5\x78\xd6\xaf\xf2\x9f\x63\x00\xdc\x65\x03\xa8\x01\x1f\x69"
      "\x00\xaa\xc7\x7c\xb7\xa2\x8b\x44\x27\x20\x63\x01\xff\xa2\x25\xe6\xd2\xc3"
      "\x1d\xfc\xb0\x06\xa0\xd0\x6e\x5e\x16\x82\x6e\x6f\xa3\xd1\xac\xd4\xbd\xba"
      "\x77\xee\xba\xa5\x1d\x67\xcb\x71\xb6\xdd\xc2\x49\xc3\xf7\x1c\xf1\xb5\x69"
      "\x2f\x5e\x4e\xab\x80\xeb\x3a\x00\xfe\x5e\x29\x65\x84\x04\x80\x5b\xf2\xfc"
      "\xa6\x7c\x0c\x53\x46\xa3\x3c\x53\x6b\x6d\xe5\x0d\xf3\xff\xb1\x84\x81\x94"
      "\xfc\x8f\x7b\x30\x3c\xc9\xda\xf8\x1e\x13\xc0\x11\x56\x91\x04\x70\x1d\xb2"
      "\x45\x74\x2c\xba\x58\x88\x56\x2a\x83\xc1\xa4\x43\xd1\x52\xe6\x13\xae\x64"
      "\x94\xd8\xac\x5e\xf8\xb5\x21\x18\x58\x5c\x36\x82\x25\x7b\x14\x27\x18\x50"
      "\x81\xef\xb9\x13\x24\x64\xa6\xb4\x1b\xc6\xa3\x0e\x49\x57\x48\xcb\xa4\x23"
      "\xe5\x19\x39\x59\x7b\x39\x60\x45\x1d\xee\xe8\x94\x0f\xe3\x11\x5b\x45\x6e"
      "\xec\x24\xe3\xfe\x9d\x4a\xbb\xdd\x72\x6d\xf9\xf7\x37\x84\xd2\x88\xdf\xfa"
      "\x68\x2c\x2f\xf7\x6c\x40\xa3\xd1\x68\x34\x1a\x8d\x46\xa3\xd1\x68\x7e\x3a"
      "\xdf\x01\x00\x00\xff\xff\x32\xed\x79\x8f",
      388);
  syz_mount_image(/*fs=*/0x200000000040, /*dir=*/0x200000000180,
                  /*flags=MS_LAZYTIME*/ 0x2000000, /*opts=*/0x20000001fc80,
                  /*chdir=*/1, /*size=*/0x184, /*img=*/0x20000001ff00);
  //  mmap$IORING_OFF_SQ_RING arguments: [
  //    addr: const = 0x0 (8 bytes)
  //    len: int32 = 0x8 (4 bytes)
  //    prot: mmap_prot = 0x2000007 (8 bytes)
  //    flags: mmap_flags = 0x401d031 (8 bytes)
  //    fd: fd_io_uring (resource)
  //    offset: const = 0x0 (8 bytes)
  //  ]
  //  returns ring_ptr
  syscall(
      __NR_mmap, /*addr=*/0ul, /*len=*/8,
      /*prot=PROT_GROWSUP|PROT_WRITE|PROT_READ|PROT_EXEC*/ 0x2000007ul,
      /*flags=MAP_UNINITIALIZED|MAP_POPULATE|MAP_NORESERVE|MAP_NONBLOCK|MAP_FIXED|0x1021*/
      0x401d031ul, /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  //  syz_open_procfs arguments: [
  //    pid: pid (resource)
  //    file: ptr[in, buffer] {
  //      buffer: {66 64 00} (length 0x3)
  //    }
  //  ]
  //  returns fd
  memcpy((void*)0x2000000001c0, "fd\000", 3);
  res = -1;
  res = syz_open_procfs(/*pid=*/-1, /*file=*/0x2000000001c0);
  if (res != -1)
    r[0] = res;
  //  statx arguments: [
  //    fd: fd_dir (resource)
  //    file: nil
  //    flags: statx_flags = 0x1000 (8 bytes)
  //    mask: statx_mask = 0x10 (8 bytes)
  //    statxbuf: nil
  //  ]
  syscall(__NR_statx, /*fd=*/r[0], /*file=*/0ul,
          /*flags=AT_EMPTY_PATH*/ 0x1000ul, /*mask=STATX_GID*/ 0x10ul,
          /*statxbuf=*/0ul);
  //  symlink arguments: [
  //    old: nil
  //    new: nil
  //  ]
  syscall(__NR_symlink, /*old=*/0ul, /*new=*/0ul);
}
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);
  const char* reason;
  (void)reason;
  loop();
  return 0;
}