// https://syzkaller.appspot.com/bug?id=0b210638616bb68109e9642158d4c0072770ae1c
// 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;
}

//% 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[2] = {0xffffffffffffffff, 0xffffffffffffffff};

void execute_one(void)
{
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  prlimit64 arguments: [
  //    pid: pid (resource)
  //    res: rlimit_type = 0xe (8 bytes)
  //    new: ptr[in, rlimit] {
  //      rlimit {
  //        soft: intptr = 0xa (8 bytes)
  //        hard: intptr = 0x8b (8 bytes)
  //      }
  //    }
  //    old: nil
  //  ]
  *(uint64_t*)0x200000000140 = 0xa;
  *(uint64_t*)0x200000000148 = 0x8b;
  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);
  //  socketpair$unix arguments: [
  //    domain: const = 0x1 (8 bytes)
  //    type: unix_socket_type = 0x2 (8 bytes)
  //    proto: const = 0x0 (4 bytes)
  //    fds: nil
  //  ]
  syscall(__NR_socketpair, /*domain=*/1ul, /*type=SOCK_DGRAM*/ 2ul, /*proto=*/0,
          /*fds=*/0ul);
  //  connect$unix arguments: [
  //    fd: sock_unix (resource)
  //    addr: nil
  //    addrlen: len = 0x0 (8 bytes)
  //  ]
  syscall(__NR_connect, /*fd=*/(intptr_t)-1, /*addr=*/0ul, /*addrlen=*/0ul);
  //  bind$alg arguments: [
  //    fd: sock_alg (resource)
  //    addr: ptr[in, sockaddr_alg] {
  //      sockaddr_alg {
  //        family: const = 0x26 (2 bytes)
  //        type: buffer: {68 61 73 68 00 00 00 00 00 00 00 00 00 00} (length
  //        0xe) feat: af_alg_type = 0x0 (4 bytes) mask: af_alg_type = 0x0 (4
  //        bytes) name: buffer: {68 6d 61 63 28 73 68 61 35 31 32 29 00 00 00
  //        00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  //        00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  //        00 00 00} (length 0x40)
  //      }
  //    }
  //    addrlen: len = 0x58 (8 bytes)
  //  ]
  *(uint16_t*)0x2000000001c0 = 0x26;
  memcpy((void*)0x2000000001c2, "hash\000\000\000\000\000\000\000\000\000\000",
         14);
  *(uint32_t*)0x2000000001d0 = 0;
  *(uint32_t*)0x2000000001d4 = 0;
  memcpy(
      (void*)0x2000000001d8,
      "hmac(sha512)"
      "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
      "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
      "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000",
      64);
  syscall(__NR_bind, /*fd=*/(intptr_t)-1, /*addr=*/0x2000000001c0ul,
          /*addrlen=*/0x58ul);
  //  setsockopt$ALG_SET_KEY arguments: [
  //    fd: sock_alg (resource)
  //    level: const = 0x117 (4 bytes)
  //    opt: const = 0x1 (4 bytes)
  //    key: nil
  //    keylen: len = 0x0 (8 bytes)
  //  ]
  syscall(__NR_setsockopt, /*fd=*/(intptr_t)-1, /*level=*/0x117, /*opt=*/1,
          /*key=*/0ul, /*keylen=*/0ul);
  //  accept$alg arguments: [
  //    fd: sock_alg (resource)
  //    peer: const = 0x0 (8 bytes)
  //    peerlen: const = 0x0 (8 bytes)
  //  ]
  //  returns sock_algconn
  res =
      syscall(__NR_accept, /*fd=*/(intptr_t)-1, /*peer=*/0ul, /*peerlen=*/0ul);
  if (res != -1)
    r[0] = res;
  //  sendmmsg$alg arguments: [
  //    fd: sock_algconn (resource)
  //    mmsg: ptr[in, array[msghdr_alg]] {
  //      array[msghdr_alg] {
  //        msghdr_alg {
  //          addr: const = 0x0 (8 bytes)
  //          addrlen: const = 0x0 (4 bytes)
  //          pad = 0x0 (4 bytes)
  //          vec: nil
  //          vlen: len = 0x0 (8 bytes)
  //          ctrl: nil
  //          ctrllen: bytesize = 0x0 (8 bytes)
  //          f: send_flags = 0x4800 (4 bytes)
  //          pad = 0x0 (4 bytes)
  //        }
  //      }
  //    }
  //    vlen: len = 0x1 (8 bytes)
  //    f: send_flags = 0x80 (8 bytes)
  //  ]
  *(uint64_t*)0x200000004780 = 0;
  *(uint32_t*)0x200000004788 = 0;
  *(uint64_t*)0x200000004790 = 0;
  *(uint64_t*)0x200000004798 = 0;
  *(uint64_t*)0x2000000047a0 = 0;
  *(uint64_t*)0x2000000047a8 = 0;
  *(uint32_t*)0x2000000047b0 = 0x4800;
  syscall(__NR_sendmmsg, /*fd=*/r[0], /*mmsg=*/0x200000004780ul, /*vlen=*/1ul,
          /*f=MSG_EOR*/ 0x80ul);
  //  syz_mount_image$vfat arguments: [
  //    fs: ptr[in, buffer] {
  //      buffer: {76 66 61 74 00} (length 0x5)
  //    }
  //    dir: ptr[in, buffer] {
  //      buffer: {2e 2f 66 69 6c 65 31 00} (length 0x8)
  //    }
  //    flags: mount_flags = 0x4604 (8 bytes)
  //    opts: ptr[inout, array[ANYUNION]] {
  //      array[ANYUNION] {
  //      }
  //    }
  //    chdir: int8 = 0x3 (1 bytes)
  //    size: len = 0x335 (8 bytes)
  //    img: ptr[in, buffer] {
  //      buffer: (compressed buffer with length 0x335)
  //    }
  //  ]
  //  returns fd_dir
  memcpy((void*)0x200000000880, "vfat\000", 5);
  memcpy((void*)0x200000003200, "./file1\000", 8);
  memcpy(
      (void*)0x200000000a40,
      "\x78\x9c\xec\xdc\xcf\x6b\x1b\x47\x14\xc0\xf1\x27\x59\x96\x25\x19\x5b\x3a"
      "\x94\x96\x16\x8a\x87\xf6\xd2\x5e\x16\x5b\xed\xb9\x54\x14\x1b\x4a\x05\x35"
      "\xb6\x55\x6a\x17\x0c\x6b\x7b\xd5\x0a\x6d\x25\xa3\x15\x2e\x2a\xa5\xb6\x4f"
      "\xbd\x96\xdc\x73\x0a\xe4\x60\x7c\xf4\xcd\x90\xf8\x1f\xf0\x25\xb7\xe4\x92"
      "\x4b\x6e\xba\x04\x72\x88\x09\x21\x1b\xf6\x97\xf5\xd3\xb6\xac\xc8\x91\x63"
      "\x7f\x3f\x10\x76\x34\x33\x4f\x3b\xa3\x19\x85\xb7\x8b\x57\xf5\x5f\xff\xff"
      "\xb3\x98\xb7\xb4\xbc\x5e\x95\x70\x4c\x49\x48\x44\xe4\x44\x24\x25\x61\x09"
      "\x84\xfc\x63\xd8\x2d\x47\xa5\xd9\x8e\x7c\x3d\xfe\xe2\xf1\xe7\x8b\xcb\x2b"
      "\x3f\x65\xb2\xd9\xd9\x05\xa5\xe6\x32\x4b\xdf\xa4\x95\x52\x93\x53\x0f\xfe"
      "\xfa\x27\xee\x77\x3b\x1c\x93\xe3\xd4\x6a\xfd\x79\xfa\xd9\xf1\xc7\xc7\x9f"
      "\xd6\xdf\x2c\xfd\x51\xb0\x54\xc1\x52\xa5\x72\x55\xe9\x6a\xad\xfc\xb4\xaa"
      "\xaf\x99\x86\xda\x28\x58\x45\x4d\xa9\x79\xd3\xd0\x2d\x43\x15\x4a\x96\x51"
      "\xf1\xda\xcb\x5e\x7b\xde\x2c\x6f\x6e\xd6\x94\x5e\xda\x98\x48\x6c\x56\x0c"
      "\xcb\x52\x7a\xa9\xa6\x8a\x46\x4d\x55\xcb\xaa\x5a\xa9\x29\xfd\x77\xbd\x50"
      "\x52\x9a\xa6\xa9\x89\x84\xe0\x02\xce\x82\x2e\xe8\x99\x3e\xa3\xd7\x07\x3c"
      "\x1a\x5c\x91\x4a\x25\xa3\x8f\x88\x48\xbc\xa3\x25\xb7\x37\x94\x01\x01\x00"
      "\x80\xa1\x6a\xcf\xff\xc3\x4e\x4a\xdf\x57\xfe\x2f\x93\x6e\xfe\xef\x74\x6e"
      "\xe4\xff\xfb\x5f\x1c\x55\xc7\x7f\x39\x98\x3c\x74\x62\x57\xeb\x87\xd1\x6e"
      "\xf9\xff\xb7\x4f\xbc\xf7\x6a\xc9\xff\x63\x22\xd2\x4f\xfe\x7f\x57\x2e\x91"
      "\xff\x77\x66\x44\xb7\x4b\x6e\x6f\xa1\xff\xfc\x1f\xd7\xc3\x54\xb4\xa3\x2a"
      "\xd4\xf2\xca\xc9\xff\x13\xfe\xf7\xd7\xb5\xfb\xdb\xfe\xb4\x5b\x20\xff\x07"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xe0\x43"
      "\x70\x62\xdb\x49\xdb\xb6\x93\xc1\x31\xf8\xd7\x78\x84\xc0\x7f\x8d\x1b\xe9"
      "\xac\xf5\x1f\x13\x91\x98\xb3\xfa\x36\xeb\x7f\x93\x2d\x2e\xaf\x48\xcc\x7d"
      "\x70\xcf\x59\x63\xf3\xbf\xad\xdc\x56\xce\x3b\xfa\x1d\x8e\x44\xc4\x14\x43"
      "\xa6\x25\x29\xaf\xdd\xfd\xe0\x73\xca\xc1\x93\x47\xca\x91\x92\x87\xe6\xb6"
      "\x1b\xff\xca\x39\x8e\xb8\x2d\x99\xbc\x14\xdc\xf8\x19\x49\x4a\xaa\x3d\xde"
      "\xb6\xe7\x7e\xcc\xce\xce\x28\x8f\x1f\x7f\xfa\x98\x52\xa2\x39\x3e\x2d\x49"
      "\xf9\xa8\x7b\x7c\xba\x35\xde\x19\xff\xf6\x56\x2e\x2a\x5f\x7d\xd9\x14\xaf"
      "\x49\x52\x1e\xad\x4b\x59\x4c\xd9\x70\xf7\x75\x23\xfe\xdf\x19\xa5\x7e\xf8"
      "\x39\xdb\x16\x1f\xf7\x4e\x02\x00\x00\x00\x00\xc0\x0d\xa0\x29\x15\xf2\x2f"
      "\x9f\x53\xad\xd7\xbf\xde\xf5\xbb\xa6\x29\xd5\xbd\xdd\xfb\x95\x91\x4c\xde"
      "\xbd\x4d\x74\xc6\xfd\x01\xef\xfa\x7a\xba\xeb\xf5\x79\x24\xf9\x59\x64\xd8"
      "\xb3\x07\x00\x00\x00\x00\xe0\x76\xb0\x6a\x7f\x17\x75\xd3\x34\x2a\xe7\x14"
      "\xe2\x72\x71\x9f\xfe\x0b\x91\xde\x3a\x47\xdb\x6a\x46\xcf\xeb\x3c\xd2\x34"
      "\xc3\x5e\xc7\x13\x75\x6f\x64\x88\xbc\xeb\xbc\xee\xf5\xf8\xa9\xb6\x14\x82"
      "\x3f\xa4\x68\x69\x8a\xf9\x95\xfd\x8d\x27\x98\xff\xc0\xd6\x6b\xa7\xb9\x26"
      "\x2c\x3d\x44\x45\xda\x07\x3f\xe5\x54\xa8\x4b\x9e\x7d\xd7\x9f\xc8\x69\x4d"
      "\x70\xdb\x28\x7a\xc6\xe7\x2c\xf3\x9d\xef\x13\x3e\x67\x27\x8c\x0e\x6c\x3f"
      "\x7f\x72\xe7\xfe\xcb\xc1\x7d\x41\xbe\x3b\x08\x76\xc0\xc5\x9d\x77\xfb\x3d"
      "\x57\xac\x7d\xd7\xb9\x85\xd1\xab\xfe\x7f\x07\x00\x00\x00\xc0\xfb\xd7\x48"
      "\xfa\x83\x9a\xef\x9b\x9b\x43\x43\x19\x14\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xb7\xcc\x95"
      "\xfc\xa4\x5f\x5b\x61\xd8\x73\x04\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xae"
      "\x8b\xb7\x01\x00\x00\xff\xff\x93\x9a\xfa\x07",
      821);
  syz_mount_image(/*fs=*/0x200000000880, /*dir=*/0x200000003200,
                  /*flags=MS_REC|MS_NODEV|MS_NOATIME|0x200*/ 0x4604,
                  /*opts=*/0x200000003240, /*chdir=*/3, /*size=*/0x335,
                  /*img=*/0x200000000a40);
  //  openat arguments: [
  //    fd: fd_dir (resource)
  //    file: ptr[in, buffer] {
  //      buffer: {2e 2f 66 69 6c 65 32 00} (length 0x8)
  //    }
  //    flags: open_flags = 0x842 (4 bytes)
  //    mode: open_mode = 0x20 (2 bytes)
  //  ]
  //  returns fd
  memcpy((void*)0x200000000080, "./file2\000", 8);
  res =
      syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x200000000080ul,
              /*flags=O_NONBLOCK|O_CREAT|O_RDWR*/ 0x842, /*mode=S_IRGRP*/ 0x20);
  if (res != -1)
    r[1] = res;
  //  mmap arguments: [
  //    addr: VMA[0x600000]
  //    len: len = 0x600000 (8 bytes)
  //    prot: mmap_prot = 0x27ffff7 (8 bytes)
  //    flags: mmap_flags = 0x4012011 (8 bytes)
  //    fd: fd (resource)
  //    offset: intptr = 0x0 (8 bytes)
  //  ]
  syscall(
      __NR_mmap, /*addr=*/0x200000000000ul, /*len=*/0x600000ul,
      /*prot=PROT_GROWSUP|PROT_WRITE|PROT_READ|PROT_EXEC|0x7ffff0*/ 0x27ffff7ul,
      /*flags=MAP_UNINITIALIZED|MAP_NONBLOCK|MAP_LOCKED|MAP_FIXED|0x1*/
      0x4012011ul, /*fd=*/r[1], /*offset=*/0ul);
  //  write$UHID_DESTROY arguments: [
  //    fd: fd_uhid (resource)
  //    data: nil
  //    len: len = 0x0 (8 bytes)
  //  ]
  syscall(__NR_write, /*fd=*/r[1], /*data=*/0ul, /*len=*/0ul);
  //  sync_file_range arguments: [
  //    fd: fd (resource)
  //    off: intptr = 0x889 (8 bytes)
  //    nbytes: intptr = 0x8 (8 bytes)
  //    flags: sync_file_flags = 0x2 (8 bytes)
  //  ]
  syscall(__NR_sync_file_range, /*fd=*/r[1], /*off=*/0x889ul, /*nbytes=*/8ul,
          /*flags=SYNC_FILE_RANGE_WRITE*/ 2ul);
  //  recvmmsg arguments: [
  //    fd: sock (resource)
  //    mmsg: nil
  //    vlen: len = 0x0 (8 bytes)
  //    f: recv_flags = 0x2 (8 bytes)
  //    timeout: nil
  //  ]
  syscall(__NR_recvmmsg, /*fd=*/(intptr_t)-1, /*mmsg=*/0ul, /*vlen=*/0ul,
          /*f=MSG_PEEK*/ 2ul, /*timeout=*/0ul);
  //  socket$inet6_sctp arguments: [
  //    domain: const = 0xa (8 bytes)
  //    type: sctp_socket_type = 0x5 (8 bytes)
  //    proto: const = 0x84 (4 bytes)
  //  ]
  //  returns sock_sctp6
  syscall(__NR_socket, /*domain=*/0xaul, /*type=SOCK_SEQPACKET*/ 5ul,
          /*proto=*/0x84);
  //  sendmsg$inet_sctp arguments: [
  //    fd: sock_sctp (resource)
  //    msg: nil
  //    f: send_flags = 0x20000855 (8 bytes)
  //  ]
  syscall(
      __NR_sendmsg, /*fd=*/(intptr_t)-1, /*msg=*/0ul,
      /*f=MSG_FASTOPEN|MSG_PROBE|MSG_OOB|MSG_DONTWAIT|MSG_DONTROUTE|MSG_CONFIRM*/
      0x20000855ul);
}
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;
}