// https://syzkaller.appspot.com/bug?id=101b7e71f53b37caf00bf159bd293d6d6512242a
// 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 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_dev(volatile long a0, volatile long a1, volatile long a2)
{
  if (a0 == 0xc || a0 == 0xb) {
    char buf[128];
    sprintf(buf, "/dev/%s/%d:%d", a0 == 0xc ? "char" : "block", (uint8_t)a1,
            (uint8_t)a2);
    return open(buf, O_RDWR, 0);
  } else {
    unsigned long nb = a1;
    char buf[1024];
    char* hash;
    strncpy(buf, (char*)a0, sizeof(buf) - 1);
    buf[sizeof(buf) - 1] = 0;
    while ((hash = strchr(buf, '#'))) {
      *hash = '0' + (char)(nb % 10);
      nb /= 10;
    }
    return open(buf, a2 & ~O_CREAT, 0);
  }
}

//% 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");
}

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[4] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff,
                 0xffffffffffffffff};

void execute_one(void)
{
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  openat$nullb arguments: [
  //    fd: const = 0xffffffffffffff9c (8 bytes)
  //    file: ptr[in, buffer] {
  //      buffer: {2f 64 65 76 2f 6e 75 6c 6c 62 30 00} (length 0xc)
  //    }
  //    flags: open_flags = 0x0 (4 bytes)
  //    mode: const = 0x0 (2 bytes)
  //  ]
  //  returns fd_block
  memcpy((void*)0x200000002280, "/dev/nullb0\000", 12);
  res = syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul,
                /*file=*/0x200000002280ul, /*flags=*/0, /*mode=*/0);
  if (res != -1)
    r[0] = res;
  //  fcntl$lock arguments: [
  //    fd: fd (resource)
  //    cmd: fcntl_lock = 0x6 (8 bytes)
  //    lock: ptr[in, flock] {
  //      flock {
  //        type: flock_type = 0x0 (2 bytes)
  //        whence: seek_whence = 0x0 (2 bytes)
  //        pad = 0x0 (4 bytes)
  //        start: intptr = 0x9 (8 bytes)
  //        len: intptr = 0x3 (8 bytes)
  //        pid: pid (resource)
  //        pad = 0x0 (4 bytes)
  //      }
  //    }
  //  ]
  *(uint16_t*)0x200000002240 = 0;
  *(uint16_t*)0x200000002242 = 0;
  *(uint64_t*)0x200000002248 = 9;
  *(uint64_t*)0x200000002250 = 3;
  *(uint32_t*)0x200000002258 = 0;
  syscall(__NR_fcntl, /*fd=*/r[0], /*cmd=F_SETLK*/ 6ul,
          /*lock=*/0x200000002240ul);
  //  flock arguments: [
  //    fd: fd (resource)
  //    op: flock_op = 0x8 (8 bytes)
  //  ]
  syscall(__NR_flock, /*fd=*/r[0], /*op=LOCK_UN*/ 8ul);
  //  prlimit64 arguments: [
  //    pid: pid (resource)
  //    res: rlimit_type = 0xe (8 bytes)
  //    new: ptr[in, rlimit] {
  //      rlimit {
  //        soft: intptr = 0x7 (8 bytes)
  //        hard: intptr = 0x100 (8 bytes)
  //      }
  //    }
  //    old: nil
  //  ]
  *(uint64_t*)0x200000000140 = 7;
  *(uint64_t*)0x200000000148 = 0x100;
  syscall(__NR_prlimit64, /*pid=*/0, /*res=RLIMIT_RTPRIO*/ 0xeul,
          /*new=*/0x200000000140ul, /*old=*/0ul);
  //  sched_setscheduler arguments: [
  //    pid: pid (resource)
  //    policy: sched_policy = 0x1 (8 bytes)
  //    prio: ptr[in, int32] {
  //      int32 = 0x7 (4 bytes)
  //    }
  //  ]
  *(uint32_t*)0x200000000240 = 7;
  syscall(__NR_sched_setscheduler, /*pid=*/0, /*policy=SCHED_FIFO*/ 1ul,
          /*prio=*/0x200000000240ul);
  //  getpid arguments: [
  //  ]
  //  returns pid
  syscall(__NR_getpid);
  //  openat$tun arguments: [
  //    fd: const = 0xffffffffffffff9c (8 bytes)
  //    file: ptr[in, buffer] {
  //      buffer: {2f 64 65 76 2f 6e 65 74 2f 74 75 6e 00} (length 0xd)
  //    }
  //    flags: open_flags = 0x48241 (4 bytes)
  //    mode: const = 0x0 (2 bytes)
  //  ]
  //  returns fd_tun
  memcpy((void*)0x200000000000, "/dev/net/tun\000", 13);
  res = syscall(
      __NR_openat, /*fd=*/0xffffffffffffff9cul, /*file=*/0x200000000000ul,
      /*flags=O_TRUNC|O_NOATIME|O_LARGEFILE|O_CREAT|O_WRONLY*/ 0x48241,
      /*mode=*/0);
  if (res != -1)
    r[1] = res;
  //  ioctl$TUNSETIFF arguments: [
  //    fd: fd_tun (resource)
  //    cmd: const = 0x400454ca (4 bytes)
  //    arg: ptr[in, ifreq_dev_t[devnames, flags[tun_setiff_flags, int16]]] {
  //      ifreq_dev_t[devnames, flags[tun_setiff_flags, int16]] {
  //        ifr_ifrn: buffer: {73 79 7a 6b 61 6c 6c 65 72 31 00 00 00 00 00 00}
  //        (length 0x10) elem: tun_setiff_flags = 0x6bf1c2d5adba8c32 (2 bytes)
  //        pad = 0x0 (22 bytes)
  //      }
  //    }
  //  ]
  memcpy((void*)0x2000000000c0, "syzkaller1\000\000\000\000\000\000", 16);
  *(uint16_t*)0x2000000000d0 = 0x8c32;
  syscall(__NR_ioctl, /*fd=*/r[1], /*cmd=*/0x400454ca,
          /*arg=*/0x2000000000c0ul);
  //  socket$kcm arguments: [
  //    domain: const = 0x2 (8 bytes)
  //    type: kcm_socket_type = 0xa (8 bytes)
  //    proto: const = 0x2 (4 bytes)
  //  ]
  //  returns sock_kcm
  syscall(__NR_socket, /*domain=*/2ul, /*type=SOCK_DGRAM|0x8*/ 0xaul,
          /*proto=*/2);
  //  write$tun arguments: [
  //    fd: fd_tun (resource)
  //    buf: ptr[inout, array[ANYUNION]] {
  //      array[ANYUNION] {
  //        union ANYUNION {
  //          ANYBLOB: buffer: {} (length 0x0)
  //        }
  //      }
  //    }
  //    count: len = 0x2a (8 bytes)
  //  ]
  syscall(__NR_write, /*fd=*/r[1], /*buf=*/0x2000000002c0ul, /*count=*/0x2aul);
  //  syz_mount_image$erofs arguments: [
  //    fs: ptr[in, buffer] {
  //      buffer: {65 72 6f 66 73 00} (length 0x6)
  //    }
  //    dir: ptr[in, buffer] {
  //      buffer: {2e 2f 66 69 6c 65 31 00} (length 0x8)
  //    }
  //    flags: mount_flags = 0x3008003 (8 bytes)
  //    opts: ptr[inout, array[ANYUNION]] {
  //      array[ANYUNION] {
  //      }
  //    }
  //    chdir: int8 = 0x2 (1 bytes)
  //    size: len = 0x20b (8 bytes)
  //    img: ptr[in, buffer] {
  //      buffer: (compressed buffer with length 0x20b)
  //    }
  //  ]
  //  returns fd_dir
  memcpy((void*)0x200000000080, "erofs\000", 6);
  memcpy((void*)0x200000000100, "./file1\000", 8);
  memcpy(
      (void*)0x200000000540,
      "\x78\x9c\xec\x99\x3d\x88\x13\x51\x10\xc7\xff\xef\x65\xb3\x89\x87\x1c\xda"
      "\x58\xd8\x58\x78\xe0\x89\xde\x66\x77\xa3\x72\xcd\x09\x27\x58\x89\x20\x9c"
      "\xa2\x96\xc1\x5b\x8f\xd3\xbd\x44\x92\x15\x92\x80\x68\xb0\xb1\xd1\xce\x42"
      "\xb0\xb5\xb1\xb4\xb0\xb0\xb2\xb0\xb2\xb4\xd5\x42\x05\xc1\xc2\x94\x82\x85"
      "\xb0\xf2\x3e\x76\xf7\xb1\xd9\x8d\xc6\x4f\xf0\xe6\x07\xf7\xee\xbf\x33\xb3"
      "\xef\xcd\x4c\xb2\x53\x64\x41\x10\xc4\xb6\xe5\xfd\xbb\xcf\x6f\xef\x9e\x58"
      "\x3e\x7b\x18\xc0\x4e\x2c\xa0\xa6\xed\x1f\x2b\x59\x0c\x37\xe2\xdf\x3c\xb8"
      "\x7e\xe8\xfe\xca\xc9\x87\x4f\x5e\x3f\x7a\xd1\x9e\xbf\xf1\x2c\xbf\x1f\x03"
      "\x10\xc7\xa5\xc7\x7d\xc9\xbb\x6c\x00\xcf\x57\x2b\x88\xc0\x2c\x65\x89\x63"
      "\xcc\x67\xfe\x05\x61\x90\xdc\x14\x5a\x72\x0e\x1c\x07\xb5\x3e\x0f\x06\x47"
      "\xc9\xaf\x2a\x4e\x5d\x04\x60\xb8\xa8\x63\xae\x18\xba\xb3\x43\x8b\x30\x70"
      "\x2e\x75\xc2\xf5\xcb\x9b\x61\xe0\x8a\xc5\x13\x8b\x2f\x96\xa6\x99\x9f\x48"
      "\x6a\x3c\x62\x58\x07\x50\x87\x4a\x86\x65\x2e\xf4\x06\xc3\xab\xad\x30\x0c"
      "\xba\x79\x51\x8d\x93\x73\x26\x5c\xb3\x0a\x5e\xda\x4e\x9d\xdf\x2a\xc7\x0a"
      "\x92\xee\xc5\xb1\x88\xbf\x70\xe7\xf6\x48\x5c\xeb\xde\xc0\x05\x4f\xfb\xe7"
      "\x81\xc3\xd3\xba\x09\x86\x35\xad\x97\x51\x83\xe3\x38\x59\x4b\x8c\xfa\xf7"
      "\x5a\xd9\xfe\xc6\x57\xa3\xbc\xfe\xdf\x2c\x8e\xcb\xb3\xee\xfd\xe8\x5d\x8f"
      "\xa5\xd8\xbd\xf4\xe7\x13\x53\x22\x79\x46\x66\xb9\x4b\xb4\xf1\x6f\xb4\xee"
      "\x3f\x12\xd5\xcc\xf2\xf2\x14\xf0\x93\xfb\xb0\xbc\x45\x3c\xd0\xa9\x65\xcf"
      "\x38\x99\x81\x66\xcc\x87\x7f\x56\x3b\xbe\x1f\x53\x9f\xfe\x30\x42\xfb\x27"
      "\x5c\xaf\xe6\xc2\xf0\xf4\x2f\x64\x68\x17\x34\x2a\x15\xd9\x7c\x12\x93\xfd"
      "\x80\x31\x9f\x2c\x58\xe9\xfc\x68\x44\x5b\xd7\x1a\xbd\xc1\x70\x69\x73\xab"
      "\xb5\x11\x6c\x04\x6d\xdf\x6f\x1e\x73\x8f\xb8\xee\x51\xbf\x21\x07\x91\x5a"
      "\xa7\xcc\xbf\xba\x9c\x4f\x73\xc6\xfe\xd5\x92\x58\x9b\xd9\xe8\xb7\xa2\xa8"
      "\xeb\xf5\x81\xa8\xeb\xa5\xd7\xbe\x5a\x7b\xe2\x83\x97\x05\x60\xed\x69\xe7"
      "\x93\xb8\x65\x17\xe4\xfc\xe3\x58\xdc\x2f\xb7\x90\x33\x55\x96\x5d\x2b\x3e"
      "\x83\xe9\x3f\x2e\xff\x0b\xb5\x58\x29\x8e\xbc\x55\x5a\x13\x41\x10\x04\x41"
      "\x10\x04\x41\x10\x04\x41\x10\x04\x41\x10\x44\x31\xfb\xc0\x92\x57\x66\x0c"
      "\xe9\xdb\xb3\x09\xfc\x33\xf2\x17\xca\x6f\x01\x00\x00\xff\xff\x13\x3d\x66"
      "\xaf",
      523);
  syz_mount_image(
      /*fs=*/0x200000000080, /*dir=*/0x200000000100,
      /*flags=MS_LAZYTIME|MS_STRICTATIME|MS_SILENT|MS_RDONLY|MS_NOSUID*/
      0x3008003, /*opts=*/0x200000002ac0, /*chdir=*/2, /*size=*/0x20b,
      /*img=*/0x200000000540);
  //  openat arguments: [
  //    fd: fd_dir (resource)
  //    file: ptr[in, buffer] {
  //      buffer: {2e 00} (length 0x2)
  //    }
  //    flags: open_flags = 0x0 (4 bytes)
  //    mode: open_mode = 0x0 (2 bytes)
  //  ]
  //  returns fd
  memcpy((void*)0x200000000500, ".\000", 2);
  res = syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x200000000500ul,
                /*flags=*/0, /*mode=*/0);
  if (res != -1)
    r[2] = res;
  //  ioctl$EXT4_IOC_GET_ES_CACHE arguments: [
  //    fd: fd (resource)
  //    cmd: const = 0xc020660b (4 bytes)
  //    args: ptr[inout, fiemap] {
  //      fiemap {
  //        start: int64 = 0xffffffffffff81fa (8 bytes)
  //        len: int64 = 0x10000002000003 (8 bytes)
  //        flags: fiemap_flags = 0x0 (4 bytes)
  //        mapped: int32 = 0x0 (4 bytes)
  //        count: len = 0x0 (4 bytes)
  //        reserved: const = 0x0 (4 bytes)
  //        extent: array[fiemap_extent] {
  //        }
  //      }
  //    }
  //  ]
  *(uint64_t*)0x2000000001c0 = 0xffffffffffff81fa;
  *(uint64_t*)0x2000000001c8 = 0x10000002000003;
  *(uint32_t*)0x2000000001d0 = 0;
  *(uint32_t*)0x2000000001d4 = 0;
  *(uint32_t*)0x2000000001d8 = 0;
  *(uint32_t*)0x2000000001dc = 0;
  syscall(__NR_ioctl, /*fd=*/r[2], /*cmd=*/0xc020660b,
          /*args=*/0x2000000001c0ul);
  //  syz_open_dev$sndctrl arguments: [
  //    dev: ptr[in, buffer] {
  //      buffer: {2f 64 65 76 2f 73 6e 64 2f 63 6f 6e 74 72 6f 6c 43 23 00}
  //      (length 0x13)
  //    }
  //    id: intptr = 0x1 (8 bytes)
  //    flags: open_flags = 0x0 (8 bytes)
  //  ]
  //  returns fd_sndctrl
  memcpy((void*)0x200000000000, "/dev/snd/controlC#\000", 19);
  res = -1;
  res = syz_open_dev(/*dev=*/0x200000000000, /*id=*/1, /*flags=*/0);
  if (res != -1)
    r[3] = res;
  //  ioctl$SNDRV_CTL_IOCTL_ELEM_READ arguments: [
  //    fd: fd_sndctrl (resource)
  //    cmd: const = 0xc4c85513 (4 bytes)
  //    arg: nil
  //  ]
  syscall(__NR_ioctl, /*fd=*/r[3], /*cmd=*/0xc4c85513, /*arg=*/0ul);
  //  mount arguments: [
  //    src: nil
  //    dst: ptr[in, buffer] {
  //      buffer: {2e 2f 66 69 6c 65 30 00} (length 0x8)
  //    }
  //    type: ptr[in, buffer] {
  //      buffer: {73 79 73 66 73 00} (length 0x6)
  //    }
  //    flags: mount_flags = 0x1214040 (8 bytes)
  //    data: nil
  //  ]
  memcpy((void*)0x200000000180, "./file0\000", 8);
  memcpy((void*)0x200000000080, "sysfs\000", 6);
  syscall(__NR_mount, /*src=*/0ul, /*dst=*/0x200000000180ul,
          /*type=*/0x200000000080ul,
          /*flags=MS_POSIXACL|MS_REC|MS_STRICTATIME|MS_RELATIME|MS_MANDLOCK*/
          0x1214040ul, /*data=*/0ul);
}
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;
  loop();
  return 0;
}