// https://syzkaller.appspot.com/bug?id=46ccb3a18e72d7f7aa478381dd63f32b4b5e92f7
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <arpa/inet.h>
#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <net/if.h>
#include <net/if_arp.h>
#include <netinet/in.h>
#include <sched.h>
#include <setjmp.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/resource.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/swap.h>
#include <sys/syscall.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>

#include <linux/capability.h>
#include <linux/falloc.h>
#include <linux/genetlink.h>
#include <linux/if_addr.h>
#include <linux/if_ether.h>
#include <linux/if_link.h>
#include <linux/if_tun.h>
#include <linux/in6.h>
#include <linux/ip.h>
#include <linux/loop.h>
#include <linux/neighbour.h>
#include <linux/net.h>
#include <linux/netlink.h>
#include <linux/rtnetlink.h>
#include <linux/tcp.h>
#include <linux/veth.h>

#ifndef __NR_memfd_create
#define __NR_memfd_create 319
#endif

static unsigned long long procid;

static void use_temporary_dir(void)
{
  char tmpdir_template[] = "./syzkaller.XXXXXX";
  char* tmpdir = mkdtemp(tmpdir_template);
  if (!tmpdir)
    exit(1);
  if (chmod(tmpdir, 0777))
    exit(1);
  if (chdir(tmpdir))
    exit(1);
}

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;
}

struct nlmsg {
  char* pos;
  int nesting;
  struct nlattr* nested[8];
  char buf[4096];
};

static void netlink_init(struct nlmsg* nlmsg, int typ, int flags,
                         const void* data, int size)
{
  memset(nlmsg, 0, sizeof(*nlmsg));
  struct nlmsghdr* hdr = (struct nlmsghdr*)nlmsg->buf;
  hdr->nlmsg_type = typ;
  hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK | flags;
  memcpy(hdr + 1, data, size);
  nlmsg->pos = (char*)(hdr + 1) + NLMSG_ALIGN(size);
}

static void netlink_attr(struct nlmsg* nlmsg, int typ, const void* data,
                         int size)
{
  struct nlattr* attr = (struct nlattr*)nlmsg->pos;
  attr->nla_len = sizeof(*attr) + size;
  attr->nla_type = typ;
  if (size > 0)
    memcpy(attr + 1, data, size);
  nlmsg->pos += NLMSG_ALIGN(attr->nla_len);
}

static int netlink_send_ext(struct nlmsg* nlmsg, int sock, uint16_t reply_type,
                            int* reply_len, bool dofail)
{
  if (nlmsg->pos > nlmsg->buf + sizeof(nlmsg->buf) || nlmsg->nesting)
    exit(1);
  struct nlmsghdr* hdr = (struct nlmsghdr*)nlmsg->buf;
  hdr->nlmsg_len = nlmsg->pos - nlmsg->buf;
  struct sockaddr_nl addr;
  memset(&addr, 0, sizeof(addr));
  addr.nl_family = AF_NETLINK;
  ssize_t n = sendto(sock, nlmsg->buf, hdr->nlmsg_len, 0,
                     (struct sockaddr*)&addr, sizeof(addr));
  if (n != (ssize_t)hdr->nlmsg_len) {
    if (dofail)
      exit(1);
    return -1;
  }
  n = recv(sock, nlmsg->buf, sizeof(nlmsg->buf), 0);
  if (reply_len)
    *reply_len = 0;
  if (n < 0) {
    if (dofail)
      exit(1);
    return -1;
  }
  if (n < (ssize_t)sizeof(struct nlmsghdr)) {
    errno = EINVAL;
    if (dofail)
      exit(1);
    return -1;
  }
  if (hdr->nlmsg_type == NLMSG_DONE)
    return 0;
  if (reply_len && hdr->nlmsg_type == reply_type) {
    *reply_len = n;
    return 0;
  }
  if (n < (ssize_t)(sizeof(struct nlmsghdr) + sizeof(struct nlmsgerr))) {
    errno = EINVAL;
    if (dofail)
      exit(1);
    return -1;
  }
  if (hdr->nlmsg_type != NLMSG_ERROR) {
    errno = EINVAL;
    if (dofail)
      exit(1);
    return -1;
  }
  errno = -((struct nlmsgerr*)(hdr + 1))->error;
  return -errno;
}

static int netlink_send(struct nlmsg* nlmsg, int sock)
{
  return netlink_send_ext(nlmsg, sock, 0, NULL, true);
}

static int netlink_query_family_id(struct nlmsg* nlmsg, int sock,
                                   const char* family_name, bool dofail)
{
  struct genlmsghdr genlhdr;
  memset(&genlhdr, 0, sizeof(genlhdr));
  genlhdr.cmd = CTRL_CMD_GETFAMILY;
  netlink_init(nlmsg, GENL_ID_CTRL, 0, &genlhdr, sizeof(genlhdr));
  netlink_attr(nlmsg, CTRL_ATTR_FAMILY_NAME, family_name,
               strnlen(family_name, GENL_NAMSIZ - 1) + 1);
  int n = 0;
  int err = netlink_send_ext(nlmsg, sock, GENL_ID_CTRL, &n, dofail);
  if (err < 0) {
    return -1;
  }
  uint16_t id = 0;
  struct nlattr* attr = (struct nlattr*)(nlmsg->buf + NLMSG_HDRLEN +
                                         NLMSG_ALIGN(sizeof(genlhdr)));
  for (; (char*)attr < nlmsg->buf + n;
       attr = (struct nlattr*)((char*)attr + NLMSG_ALIGN(attr->nla_len))) {
    if (attr->nla_type == CTRL_ATTR_FAMILY_ID) {
      id = *(uint16_t*)(attr + 1);
      break;
    }
  }
  if (!id) {
    errno = EINVAL;
    return -1;
  }
  recv(sock, nlmsg->buf, sizeof(nlmsg->buf), 0);
  return id;
}

static void netlink_device_change(struct nlmsg* nlmsg, int sock,
                                  const char* name, bool up, const char* master,
                                  const void* mac, int macsize,
                                  const char* new_name)
{
  struct ifinfomsg hdr;
  memset(&hdr, 0, sizeof(hdr));
  if (up)
    hdr.ifi_flags = hdr.ifi_change = IFF_UP;
  hdr.ifi_index = if_nametoindex(name);
  netlink_init(nlmsg, RTM_NEWLINK, 0, &hdr, sizeof(hdr));
  if (new_name)
    netlink_attr(nlmsg, IFLA_IFNAME, new_name, strlen(new_name));
  if (master) {
    int ifindex = if_nametoindex(master);
    netlink_attr(nlmsg, IFLA_MASTER, &ifindex, sizeof(ifindex));
  }
  if (macsize)
    netlink_attr(nlmsg, IFLA_ADDRESS, mac, macsize);
  int err = netlink_send(nlmsg, sock);
  if (err < 0) {
  }
}

static int netlink_add_addr(struct nlmsg* nlmsg, int sock, const char* dev,
                            const void* addr, int addrsize)
{
  struct ifaddrmsg hdr;
  memset(&hdr, 0, sizeof(hdr));
  hdr.ifa_family = addrsize == 4 ? AF_INET : AF_INET6;
  hdr.ifa_prefixlen = addrsize == 4 ? 24 : 120;
  hdr.ifa_scope = RT_SCOPE_UNIVERSE;
  hdr.ifa_index = if_nametoindex(dev);
  netlink_init(nlmsg, RTM_NEWADDR, NLM_F_CREATE | NLM_F_REPLACE, &hdr,
               sizeof(hdr));
  netlink_attr(nlmsg, IFA_LOCAL, addr, addrsize);
  netlink_attr(nlmsg, IFA_ADDRESS, addr, addrsize);
  return netlink_send(nlmsg, sock);
}

static void netlink_add_addr4(struct nlmsg* nlmsg, int sock, const char* dev,
                              const char* addr)
{
  struct in_addr in_addr;
  inet_pton(AF_INET, addr, &in_addr);
  int err = netlink_add_addr(nlmsg, sock, dev, &in_addr, sizeof(in_addr));
  if (err < 0) {
  }
}

static void netlink_add_addr6(struct nlmsg* nlmsg, int sock, const char* dev,
                              const char* addr)
{
  struct in6_addr in6_addr;
  inet_pton(AF_INET6, addr, &in6_addr);
  int err = netlink_add_addr(nlmsg, sock, dev, &in6_addr, sizeof(in6_addr));
  if (err < 0) {
  }
}

static void netlink_add_neigh(struct nlmsg* nlmsg, int sock, const char* name,
                              const void* addr, int addrsize, const void* mac,
                              int macsize)
{
  struct ndmsg hdr;
  memset(&hdr, 0, sizeof(hdr));
  hdr.ndm_family = addrsize == 4 ? AF_INET : AF_INET6;
  hdr.ndm_ifindex = if_nametoindex(name);
  hdr.ndm_state = NUD_PERMANENT;
  netlink_init(nlmsg, RTM_NEWNEIGH, NLM_F_EXCL | NLM_F_CREATE, &hdr,
               sizeof(hdr));
  netlink_attr(nlmsg, NDA_DST, addr, addrsize);
  netlink_attr(nlmsg, NDA_LLADDR, mac, macsize);
  int err = netlink_send(nlmsg, sock);
  if (err < 0) {
  }
}

static struct nlmsg nlmsg;

static int tunfd = -1;

#define TUN_IFACE "syz_tun"
#define LOCAL_MAC 0xaaaaaaaaaaaa
#define REMOTE_MAC 0xaaaaaaaaaabb
#define LOCAL_IPV4 "172.20.20.170"
#define REMOTE_IPV4 "172.20.20.187"
#define LOCAL_IPV6 "fe80::aa"
#define REMOTE_IPV6 "fe80::bb"

#define IFF_NAPI 0x0010

static void initialize_tun(void)
{
  tunfd = open("/dev/net/tun", O_RDWR | O_NONBLOCK);
  if (tunfd == -1) {
    printf("tun: can't open /dev/net/tun: please enable CONFIG_TUN=y\n");
    printf("otherwise fuzzing or reproducing might not work as intended\n");
    return;
  }
  const int kTunFd = 200;
  if (dup2(tunfd, kTunFd) < 0)
    exit(1);
  close(tunfd);
  tunfd = kTunFd;
  struct ifreq ifr;
  memset(&ifr, 0, sizeof(ifr));
  strncpy(ifr.ifr_name, TUN_IFACE, IFNAMSIZ);
  ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
  if (ioctl(tunfd, TUNSETIFF, (void*)&ifr) < 0) {
    exit(1);
  }
  char sysctl[64];
  sprintf(sysctl, "/proc/sys/net/ipv6/conf/%s/accept_dad", TUN_IFACE);
  write_file(sysctl, "0");
  sprintf(sysctl, "/proc/sys/net/ipv6/conf/%s/router_solicitations", TUN_IFACE);
  write_file(sysctl, "0");
  int sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
  if (sock == -1)
    exit(1);
  netlink_add_addr4(&nlmsg, sock, TUN_IFACE, LOCAL_IPV4);
  netlink_add_addr6(&nlmsg, sock, TUN_IFACE, LOCAL_IPV6);
  uint64_t macaddr = REMOTE_MAC;
  struct in_addr in_addr;
  inet_pton(AF_INET, REMOTE_IPV4, &in_addr);
  netlink_add_neigh(&nlmsg, sock, TUN_IFACE, &in_addr, sizeof(in_addr),
                    &macaddr, ETH_ALEN);
  struct in6_addr in6_addr;
  inet_pton(AF_INET6, REMOTE_IPV6, &in6_addr);
  netlink_add_neigh(&nlmsg, sock, TUN_IFACE, &in6_addr, sizeof(in6_addr),
                    &macaddr, ETH_ALEN);
  macaddr = LOCAL_MAC;
  netlink_device_change(&nlmsg, sock, TUN_IFACE, true, 0, &macaddr, ETH_ALEN,
                        NULL);
  close(sock);
}

static int runcmdline(char* cmdline)
{
  int ret = system(cmdline);
  if (ret) {
  }
  return ret;
}

#define MAX_FDS 30

//% 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");
  }
  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 setup_common()
{
  if (mount(0, "/sys/fs/fuse/connections", "fusectl", 0, 0)) {
  }
}

static void setup_binderfs()
{
  if (mkdir("/dev/binderfs", 0777)) {
  }
  if (mount("binder", "/dev/binderfs", "binder", 0, NULL)) {
  }
}

static void loop();

static void sandbox_common()
{
  prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
  setsid();
  struct rlimit rlim;
  rlim.rlim_cur = rlim.rlim_max = (200 << 20);
  setrlimit(RLIMIT_AS, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 32 << 20;
  setrlimit(RLIMIT_MEMLOCK, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 136 << 20;
  setrlimit(RLIMIT_FSIZE, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 1 << 20;
  setrlimit(RLIMIT_STACK, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 128 << 20;
  setrlimit(RLIMIT_CORE, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 256;
  setrlimit(RLIMIT_NOFILE, &rlim);
  if (unshare(CLONE_NEWNS)) {
  }
  if (mount(NULL, "/", NULL, MS_REC | MS_PRIVATE, NULL)) {
  }
  if (unshare(CLONE_NEWIPC)) {
  }
  if (unshare(0x02000000)) {
  }
  if (unshare(CLONE_NEWUTS)) {
  }
  if (unshare(CLONE_SYSVSEM)) {
  }
  typedef struct {
    const char* name;
    const char* value;
  } sysctl_t;
  static const sysctl_t sysctls[] = {
      {"/proc/sys/kernel/shmmax", "16777216"},
      {"/proc/sys/kernel/shmall", "536870912"},
      {"/proc/sys/kernel/shmmni", "1024"},
      {"/proc/sys/kernel/msgmax", "8192"},
      {"/proc/sys/kernel/msgmni", "1024"},
      {"/proc/sys/kernel/msgmnb", "1024"},
      {"/proc/sys/kernel/sem", "1024 1048576 500 1024"},
  };
  unsigned i;
  for (i = 0; i < sizeof(sysctls) / sizeof(sysctls[0]); i++)
    write_file(sysctls[i].name, sysctls[i].value);
}

static int wait_for_loop(int pid)
{
  if (pid < 0)
    exit(1);
  int status = 0;
  while (waitpid(-1, &status, __WALL) != pid) {
  }
  return WEXITSTATUS(status);
}

static void drop_caps(void)
{
  struct __user_cap_header_struct cap_hdr = {};
  struct __user_cap_data_struct cap_data[2] = {};
  cap_hdr.version = _LINUX_CAPABILITY_VERSION_3;
  cap_hdr.pid = getpid();
  if (syscall(SYS_capget, &cap_hdr, &cap_data))
    exit(1);
  const int drop = (1 << CAP_SYS_PTRACE) | (1 << CAP_SYS_NICE);
  cap_data[0].effective &= ~drop;
  cap_data[0].permitted &= ~drop;
  cap_data[0].inheritable &= ~drop;
  if (syscall(SYS_capset, &cap_hdr, &cap_data))
    exit(1);
}

static int do_sandbox_none(void)
{
  if (unshare(CLONE_NEWPID)) {
  }
  int pid = fork();
  if (pid != 0)
    return wait_for_loop(pid);
  setup_common();
  sandbox_common();
  drop_caps();
  if (unshare(CLONE_NEWNET)) {
  }
  write_file("/proc/sys/net/ipv4/ping_group_range", "0 65535");
  initialize_tun();
  setup_binderfs();
  loop();
  exit(1);
}

static void close_fds()
{
  for (int fd = 3; fd < MAX_FDS; fd++)
    close(fd);
}

static void setup_binfmt_misc()
{
  if (mount(0, "/proc/sys/fs/binfmt_misc", "binfmt_misc", 0, 0)) {
    return;
  }
  if (!write_file("/proc/sys/fs/binfmt_misc/register",
                  ":syz0:M:0:\x01::./file0:") ||
      !write_file("/proc/sys/fs/binfmt_misc/register",
                  ":syz1:M:1:\x02::./file0:POC"))
    exit(1);
}

static void setup_usb()
{
  if (chmod("/dev/raw-gadget", 0666))
    exit(1);
}

static void setup_sysctl()
{
  char mypid[32];
  snprintf(mypid, sizeof(mypid), "%d", getpid());
  struct {
    const char* name;
    const char* data;
  } files[] = {
      {"/sys/kernel/debug/x86/nmi_longest_ns", "10000000000"},
      {"/proc/sys/kernel/hung_task_check_interval_secs", "20"},
      {"/proc/sys/net/core/bpf_jit_kallsyms", "1"},
      {"/proc/sys/net/core/bpf_jit_harden", "0"},
      {"/proc/sys/kernel/kptr_restrict", "0"},
      {"/proc/sys/kernel/softlockup_all_cpu_backtrace", "1"},
      {"/proc/sys/fs/mount-max", "100"},
      {"/proc/sys/vm/oom_dump_tasks", "0"},
      {"/proc/sys/debug/exception-trace", "0"},
      {"/proc/sys/kernel/printk", "7 4 1 3"},
      {"/proc/sys/kernel/keys/gc_delay", "1"},
      {"/proc/sys/vm/oom_kill_allocating_task", "1"},
      {"/proc/sys/kernel/ctrl-alt-del", "0"},
      {"/proc/sys/kernel/cad_pid", mypid},
  };
  for (size_t i = 0; i < sizeof(files) / sizeof(files[0]); i++) {
    if (!write_file(files[i].name, files[i].data))
      printf("write to %s failed: %s\n", files[i].name, strerror(errno));
  }
}

#define SWAP_FILE "./swap-file"
#define SWAP_FILE_SIZE (128 * 1000 * 1000)

static void setup_swap()
{
  swapoff(SWAP_FILE);
  unlink(SWAP_FILE);
  int fd = open(SWAP_FILE, O_CREAT | O_WRONLY | O_CLOEXEC, 0600);
  if (fd == -1)
    exit(1);
  fallocate(fd, FALLOC_FL_ZERO_RANGE, 0, SWAP_FILE_SIZE);
  close(fd);
  char cmdline[64];
  sprintf(cmdline, "mkswap %s", SWAP_FILE);
  if (runcmdline(cmdline))
    exit(1);
  if (swapon(SWAP_FILE, SWAP_FLAG_PREFER) == 1)
    exit(1);
}

uint64_t r[1] = {0xffffffffffffffff};

void loop(void)
{
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  memcpy((void*)0x20000040, "ext4\000", 5);
  memcpy((void*)0x20000140, "./file1\000", 8);
  memcpy((void*)0x200005c0, "noblock_validity", 16);
  *(uint8_t*)0x200005d0 = 0x2c;
  memcpy((void*)0x200005d1, "bsddf", 5);
  *(uint8_t*)0x200005d6 = 0x2c;
  memcpy((void*)0x200005d7, "sysvgroups", 10);
  *(uint8_t*)0x200005e1 = 0x2c;
  memcpy((void*)0x200005e2, "norecovery", 10);
  *(uint8_t*)0x200005ec = 0x2c;
  memcpy((void*)0x200005ed, "debug_want_extra_isize", 22);
  *(uint8_t*)0x20000603 = 0x3d;
  sprintf((char*)0x20000604, "0x%016llx", (long long)0x80);
  *(uint8_t*)0x20000616 = 0x2c;
  memcpy((void*)0x20000617, "orlov", 5);
  *(uint8_t*)0x2000061c = 0x2c;
  memcpy((void*)0x2000061d, "nogrpid", 7);
  *(uint8_t*)0x20000624 = 0x2c;
  memcpy((void*)0x20000625, "noauto_da_alloc", 15);
  *(uint8_t*)0x20000634 = 0x2c;
  memcpy((void*)0x20000635, "nomblk_io_submit", 16);
  *(uint8_t*)0x20000645 = 0x2c;
  *(uint8_t*)0x20000646 = 0;
  memcpy(
      (void*)0x200015c0,
      "\x78\x9c\xec\xdd\xcf\x6b\x1c\x55\x1c\x00\xf0\xef\x6c\x92\xfe\xd6\xa6\x50"
      "\x8a\x7a\x90\x40\x0f\x56\x6a\x37\x4d\xe2\x8f\x0a\x42\xeb\x51\xb4\x58\xd0"
      "\x7b\x5d\x92\x69\x28\xd9\x74\x4b\x76\x53\x9a\x58\x68\x7b\xb0\x17\x2f\x52"
      "\x04\x11\x0b\xe2\x1f\xe0\xdd\x63\xf1\x1f\xf0\xaf\x28\x68\xa1\x48\x09\x7a"
      "\xf0\x12\x99\xcd\x6c\xbb\x4d\xb2\xf9\xb9\x75\xb7\xce\xe7\x03\xd3\xbe\x37"
      "\x33\x9b\x37\x6f\xdf\x7c\xdf\x7e\x67\x67\x97\x0d\xa0\xb0\x46\xb2\x7f\x4a"
      "\x11\xaf\x46\xc4\x37\x49\xc4\xe1\xb6\x6d\x83\x91\x6f\x1c\x59\xd9\x6f\xe9"
      "\xf1\x8d\xc9\x6c\x49\x62\x79\xf9\xb3\x3f\x93\x48\xf2\x75\xad\xfd\x93\xfc"
      "\xff\x83\x79\xe5\x95\x88\xf8\xf5\xab\x88\x93\xa5\xb5\xed\xd6\x17\x16\x67"
      "\x2a\xd5\x6a\x3a\x97\xd7\x47\x1b\xb3\x57\x47\xeb\x0b\x8b\xa7\x2e\xcf\x56"
      "\xa6\xd3\xe9\xf4\xca\xf8\xc4\xc4\x99\x77\x26\xc6\xdf\x7f\xef\xdd\xae\xf5"
      "\xf5\xcd\x0b\x7f\x7f\xff\xe9\xfd\x8f\xce\x7c\x7d\x7c\xe9\xbb\x9f\x1f\x1e"
      "\xb9\x9b\xc4\xb9\x38\x94\x6f\x6b\xef\xc7\x2e\xdc\x6a\xaf\x8c\xc4\x48\xfe"
      "\x9c\x0c\xc5\xb9\x55\x3b\x8e\x75\xa1\xb1\x7e\x92\xf4\xfa\x00\xd8\x91\x81"
      "\x3c\xce\x87\x22\x9b\x03\x0e\xc7\x40\x1e\xf5\xc0\xff\xdf\xcd\x88\x58\x06"
      "\x0a\x2a\x11\xff\x50\x50\xad\x3c\xa0\x75\x6d\xdf\xa5\xeb\xe0\x17\xc6\xa3"
      "\x0f\x57\x2e\x80\xd6\xf6\x7f\x70\xe5\xbd\x91\xd8\xd7\xbc\x36\x3a\xb0\x94"
      "\x3c\x73\x65\x94\x5d\xef\x0e\x77\xa1\xfd\xac\x8d\x5f\xfe\xb8\x77\x37\x5b"
      "\x62\x93\xf7\x21\x6e\x76\xa1\x3d\x80\x96\x5b\xb7\x23\xe2\xf4\xe0\xe0\xda"
      "\xf9\x2f\xc9\xe7\xbf\x9d\x3b\xdd\x7c\xf3\x78\x63\xab\xdb\x28\xda\xeb\x0f"
      "\xf4\xd2\xfd\x2c\xff\x79\x6b\xbd\xfc\xa7\xf4\x24\xff\x89\x75\xf2\x9f\x83"
      "\xeb\xc4\xee\x4e\x6c\x1e\xff\xa5\x87\x5d\x68\xa6\xa3\x2c\xff\xfb\x60\xdd"
      "\xfc\xf7\xc9\xd4\x35\x3c\x90\xd7\x5e\x6a\xe6\x7c\x43\xc9\xa5\xcb\xd5\xf4"
      "\x74\x44\xbc\x1c\x11\x27\x62\x68\x6f\x56\xdf\xe8\x7e\xce\x99\xa5\x07\xcb"
      "\x9d\xb6\xb5\xe7\x7f\xd9\x92\xb5\xdf\xca\x05\xf3\xe3\x78\x38\xb8\xf7\xd9"
      "\xc7\x4c\x55\x1a\x95\xdd\xf4\xb9\xdd\xa3\xdb\x11\xaf\x3d\xcd\x7f\x93\x58"
      "\x33\xff\xef\x6b\xe6\xba\xab\xc7\x3f\x7b\x3e\x2e\x6c\xb1\x8d\x63\xe9\xbd"
      "\xd7\x3b\x6d\xdb\xbc\xff\xed\xba\x9f\x01\x2f\xff\x14\xf1\xc6\xba\xe3\xff"
      "\xf4\x8e\x56\xb2\xf1\xfd\xc9\xd1\xe6\xf9\x30\xda\x3a\x2b\xd6\xfa\xeb\xce"
      "\xb1\xdf\x3a\xb5\xbf\xbd\xfe\x77\x5f\x36\xfe\x07\x36\xee\xff\x70\xd2\x7e"
      "\xbf\xb6\xbe\xfd\x36\x7e\xdc\xf7\x4f\xda\x69\xdb\x4e\xcf\xff\x3d\xc9\xe7"
      "\xcd\xf2\x9e\x7c\xdd\xf5\x4a\xa3\x31\x37\x16\xb1\x27\xf9\x64\xed\xfa\xf1"
      "\xa7\x8f\x6d\xd5\x5b\xfb\x67\xfd\x3f\x71\x7c\xe3\xf9\x6f\xbd\xf3\x7f\x7f"
      "\x44\x7c\xb1\xc5\xfe\xdf\x39\x7a\xa7\xe3\xae\xfd\x30\xfe\x53\xdb\x1a\xff"
      "\xed\x17\x1e\x7c\xfc\xe5\x0f\x9d\xda\xdf\xda\xf8\xbf\xdd\x2c\x9d\xc8\xd7"
      "\x6c\x65\xfe\xdb\xea\x01\xee\xe6\xb9\x03\x00\x00\x00\x00\x00\x80\x7e\x53"
      "\x8a\x88\x43\x91\x94\xca\x4f\xca\xa5\x52\xb9\xbc\xf2\xf9\x8e\xa3\x71\xa0"
      "\x54\xad\xd5\x1b\x27\x2f\xd5\xe6\xaf\x4c\x45\xf3\xbb\xb2\xc3\x31\x54\x6a"
      "\xdd\xe9\x3e\xdc\xf6\x79\x88\xb1\xfc\xf3\xb0\xad\xfa\xf8\xaa\xfa\x44\x44"
      "\x1c\x89\x88\x6f\x07\xf6\x37\xeb\xe5\xc9\x5a\x75\xaa\xd7\x9d\x07\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x80\x3e\x71\xb0\xc3\xf7"
      "\xff\x33\xbf\x0f\xf4\xfa\xe8\x80\xe7\xce\x4f\x7e\x43\x71\x6d\x1a\xff\xdd"
      "\xf8\xa5\x27\xa0\x2f\x79\xfd\x87\xe2\x12\xff\x50\x5c\xe2\x1f\x8a\x4b\xfc"
      "\x43\x71\x89\x7f\x28\x2e\xf1\x0f\xc5\x25\xfe\xa1\xb8\xc4\x3f\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x74\xd5\x85\xf3\xe7\xb3\x65\x79\xe9\xf1\x8d\xc9\xac\x3e\x75\x6d\x61\x7e"
      "\xa6\x76\xed\xd4\x54\x5a\x9f\x29\xcf\xce\x4f\x96\x27\x6b\x73\x57\xcb\xd3"
      "\xb5\xda\x74\x35\x2d\x4f\xd6\x66\x37\xfb\x7b\xd5\x5a\xed\xea\xd8\x78\xcc"
      "\x5f\x1f\x6d\xa4\xf5\xc6\x68\x7d\x61\xf1\xe2\x6c\x6d\xfe\x4a\xe3\xe2\xe5"
      "\xd9\xca\x74\x7a\x31\x1d\xfa\x4f\x7a\x05\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x2f\x96\xfa\xc2\xe2\x4c\xa5\x5a\x4d\xe7\x14"
      "\x3a\x16\xce\x46\x5f\x1c\xc6\x8e\x0b\xc9\x66\xa3\x7c\x36\x3f\x19\x76\xd4"
      "\xc4\x60\xef\x3b\xa8\xf0\x1c\x0a\x3d\x9e\x98\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\xa0\xcd\xbf\x01\x00\x00\xff\xff\xdf\x29\x33"
      "\xc7",
      1386);
  syz_mount_image(/*fs=*/0x20000040, /*dir=*/0x20000140,
                  /*flags=MS_RELATIME*/ 0x200000, /*opts=*/0x200005c0,
                  /*chdir=*/3, /*size=*/0x56a, /*img=*/0x200015c0);
  memcpy((void*)0x20000040, "./bus\000", 6);
  syscall(__NR_creat, /*file=*/0x20000040ul, /*mode=*/0ul);
  memcpy((void*)0x20000380, "/dev/loop", 9);
  *(uint8_t*)0x20000389 = 0x30;
  *(uint8_t*)0x2000038a = 0;
  memcpy((void*)0x20000140, "./bus\000", 6);
  syscall(__NR_mount, /*src=*/0x20000380ul, /*dst=*/0x20000140ul, /*type=*/0ul,
          /*flags=MS_BIND*/ 0x1000ul, /*data=*/0ul);
  memcpy((void*)0x20000080, "./bus\000", 6);
  res = syscall(__NR_open, /*file=*/0x20000080ul,
                /*flags=O_SYNC|O_NOCTTY|O_DIRECT|O_CLOEXEC|O_RDWR*/ 0x185102ul,
                /*mode=*/0ul);
  if (res != -1)
    r[0] = res;
  syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0x800000ul,
          /*prot=PROT_WRITE*/ 2ul,
          /*flags=MAP_STACK|MAP_POPULATE|MAP_FIXED|MAP_SHARED*/ 0x28011ul,
          /*fd=*/r[0], /*offset=*/0ul);
  memcpy((void*)0x20000340, "./file0\000", 8);
  syscall(__NR_creat, /*file=*/0x20000340ul, /*mode=*/0ul);
  memcpy((void*)0x20000580, "ext4\000", 5);
  memcpy((void*)0x20000040, "./bus\000", 6);
  memcpy((void*)0x200010c0, "jqfmt=vfsv1", 11);
  *(uint8_t*)0x200010cb = 0x2c;
  memcpy((void*)0x200010cc, "delalloc", 8);
  *(uint8_t*)0x200010d4 = 0x2c;
  memcpy((void*)0x200010d5, "nogrpid", 7);
  *(uint8_t*)0x200010dc = 0x2c;
  memcpy((void*)0x200010dd, "init_itable", 11);
  *(uint8_t*)0x200010e8 = 0x2c;
  memcpy((void*)0x200010e9, "dioread_nolock", 14);
  *(uint8_t*)0x200010f7 = 0x2c;
  memcpy((void*)0x200010f8, "nobh", 4);
  *(uint8_t*)0x200010fc = 0x2c;
  memcpy((void*)0x200010fd, "nomblk_io_submit", 16);
  *(uint8_t*)0x2000110d = 0x2c;
  memcpy((void*)0x2000110e, "i_version", 9);
  *(uint8_t*)0x20001117 = 0x2c;
  *(uint8_t*)0x20001118 = 0;
  memcpy(
      (void*)0x20001b40,
      "\x78\x9c\xec\xdd\xcf\x6f\x15\xd5\x1e\x00\xf0\xef\xdc\xfe\xa0\xa5\xbc\xd7"
      "\x42\x5e\x9e\xe2\x42\x9a\x18\x03\x89\xd2\xd2\x02\x86\x18\x17\xb0\x35\xa4"
      "\xc1\x1f\x71\xe3\xc6\xda\x16\x44\x0a\x34\xb4\x46\x8b\x26\x94\xa4\x6e\x4c"
      "\x8c\x1b\x63\x4c\x5c\xb9\x50\xff\x0b\x25\xb2\x65\xa5\x2b\x17\x6e\x5c\x18"
      "\x43\x42\xd4\xb0\x34\xf1\x9a\xb9\x9d\x29\xbd\xed\xdc\x96\x96\xb6\x53\x3b"
      "\x9f\x4f\x72\xe9\xcc\x39\x77\x38\x67\x7a\xfb\xbd\xe7\xcc\xb9\xe7\xcc\x0d"
      "\xa0\xb2\xfa\xd3\x7f\x6a\x11\x07\x23\x62\x2a\x89\xe8\x4d\xe6\x16\xf3\xda"
      "\x23\xcb\xec\x5f\x78\xde\xfd\x3f\x3f\x18\x4b\x1f\x49\xd4\xeb\xaf\xfc\x9e"
      "\x44\x92\xa5\xe5\xcf\x4f\xb2\x9f\x3d\xd9\xc1\x5d\x11\xf1\xc3\xf7\x49\x1c"
      "\x68\x5b\x59\xee\xf4\xec\xf5\x4b\xa3\x93\x93\x13\xd7\xb2\xfd\xc1\x99\xcb"
      "\x53\x83\xd3\xb3\xd7\x8f\x5e\xbc\x3c\x7a\x61\xe2\xc2\xc4\x95\xe1\xe7\x86"
      "\x4f\x9d\x3c\x71\xf2\xd4\xd0\xb1\x0d\x9d\xd7\x8d\x82\xb4\xb3\xf3\x6f\xbf"
      "\xdb\xfb\xd1\xc8\xeb\x5f\x7d\xf1\x57\x32\xf4\xcd\xcf\x23\x49\x9c\x8e\x17"
      "\xb3\x27\x2e\x3d\x8f\xcd\xd2\x1f\xfd\x8d\xdf\x49\xb2\x32\xab\xe7\xd4\x66"
      "\x17\x56\x92\xb6\xec\xef\x64\xe9\x4b\x9c\xb4\x97\x58\x21\xd6\x25\x7f\xfd"
      "\x3a\x22\xe2\xb1\xe8\x8d\xb6\x78\xf0\xe2\xf5\xc6\x87\x2f\x95\x5a\x39\x60"
      "\x4b\xd5\x93\x88\x3a\x50\x51\xc9\x2a\xf1\xff\xeb\xfc\xd8\x85\xc6\xbb\x04"
      "\xb0\x0b\xe5\xfd\x80\xfc\xda\x7e\xf9\x75\x70\xad\x8c\x4e\x09\xb0\x2d\xee"
      "\x9d\x59\x18\x00\x58\x19\xff\xed\x0b\x63\x83\xd1\xd5\x18\x1b\xd8\x7b\x3f"
      "\x89\xa5\xc3\x3a\x49\x44\x6c\x6c\x64\xae\xd9\xbe\x88\xb8\x73\x7b\x64\xfe"
      "\xfc\xed\x91\xf9\xd8\xa2\x71\x38\xa0\xd8\xdc\xcd\x88\x78\xbc\x28\xfe\x93"
      "\x46\xfc\xf7\x45\x57\xf4\x35\xe2\xbf\xd6\x14\xff\x69\xbf\xe0\x5c\xf6\x33"
      "\x4d\x7f\x79\x83\xe5\x2f\x1f\x2a\x16\xff\xb0\x7d\x16\xe2\xbf\x6b\xd5\xf8"
      "\x8f\x16\xf1\xff\xc6\x92\xf8\x7f\x73\x83\xe5\xf7\x3f\xd8\x7c\xab\xbb\x29"
      "\xfe\xbb\x37\x7a\x4a\x00\x00\x00\x00\x00\x00\x50\x59\xb7\xce\x44\xc4\xb3"
      "\x45\x9f\xff\xd7\x16\xe7\xff\x44\xc1\xfc\x9f\x9e\x88\x38\xbd\x09\xe5\xf7"
      "\x2f\xdb\x5f\xf9\xf9\x7f\xed\xee\x26\x14\x03\x14\xb8\x77\x26\xe2\x85\xc2"
      "\xf9\xbf\xb5\x7c\xf6\x6f\x5f\x5b\xb6\xf5\x9f\xc6\x7c\x80\x8e\xe4\xfc\xc5"
      "\xc9\x89\x63\x11\xf1\xdf\x88\x38\x12\x1d\x7b\xd2\xfd\xa1\x55\xca\x38\xfa"
      "\xf1\x81\xcf\x5b\xe5\xf5\x67\xf3\xff\xf2\x47\x5a\xfe\x9d\x6c\x2e\x60\x56"
      "\x8f\xbb\xed\x7b\x9a\x8f\x19\x1f\x9d\x19\x7d\xd4\xf3\x06\x22\xee\xdd\x8c"
      "\x78\xa2\x70\xfe\x6f\xb2\xd8\xfe\x27\x05\xed\x7f\xfa\x7e\x30\xf5\x90\x65"
      "\x1c\x78\xfa\xeb\x73\xad\xf2\xd6\x8e\x7f\x60\xab\xd4\xbf\x8c\x38\x5c\xd8"
      "\xfe\x3f\xb8\x6b\x45\xb2\xfa\xfd\x39\x06\x1b\xfd\x81\xc1\xbc\x57\xb0\xd2"
      "\x93\xef\x7f\xf2\x6d\xab\xf2\x37\x1a\xff\x6e\x31\x01\x8f\x2e\x6d\xff\xf7"
      "\xae\x1e\xff\x7d\xc9\xd2\xfb\xf5\x4c\x47\xd4\xf7\xac\xaf\x8c\xe3\xb3\xed"
      "\xf5\x56\x79\x1b\xed\xff\x77\x26\xaf\x36\x6e\x39\xd3\x99\xa5\xbd\x37\x3a"
      "\x33\x73\x6d\x28\xa2\x33\x39\xdb\x96\xa6\x36\xa5\x0f\xaf\xaf\xbe\xb0\x5b"
      "\xe5\xf1\x90\xc7\x4b\x1a\xff\x47\x9e\x5a\x7d\xfc\xaf\xa8\xff\xdf\x1d\x11"
      "\x73\xcb\xfe\xef\xe4\x8f\xe6\x35\xc5\xb9\xff\xff\xdd\xf3\x4b\xab\xfa\xe8"
      "\xff\x43\x79\xd2\xf8\x1f\x5f\x57\xfb\xbf\xfe\x8d\x7a\xd2\xf7\x5d\xab\xf2"
      "\x1f\xae\xfd\x3f\xd1\x68\xeb\x8f\x64\x29\xc6\xff\x60\xc1\x67\x79\x98\x76"
      "\x36\xa7\x17\x84\x63\x7b\x51\xd6\x76\xd7\x17\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x76\x83\x5a\x44\xec\x8b\xa4\x36\xb0\xb8\x5d\xab\x0d\x0c\x44\xf4\x44\xc4"
      "\xff\x62\x6f\x6d\xf2\xea\xf4\xcc\x33\xe7\xaf\xbe\x73\x65\x3c\xcd\x6b\x7c"
      "\xff\x7f\x2d\xff\xa6\xdf\xde\x85\xfd\x24\xff\xfe\xff\xbe\x25\xfb\xc3\xcb"
      "\xf6\x8f\x47\xc4\xfe\x88\xf8\xb4\xad\xbb\xb1\x3f\x30\x76\x75\x72\xbc\xec"
      "\x93\x07\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x80\x1d"
      "\xa2\xa7\xc5\xfa\xff\xd4\x6f\x6d\x65\xd7\x0e\xd8\x72\xed\x65\x57\x00\x28"
      "\x4d\x41\xfc\xff\x58\x46\x3d\x80\xed\xa7\xfd\x87\xea\x12\xff\x50\x5d\xe2"
      "\x1f\xaa\x4b\xfc\x43\x75\x89\x7f\xa8\x2e\xf1\x0f\xd5\x25\xfe\xa1\xba\xc4"
      "\x3f\x00\x00\x00\x00\x00\xec\x2a\xfb\x0f\xdd\xfa\x29\x89\x88\xb9\xe7\xbb"
      "\x1b\x8f\x54\x67\x96\xd7\x51\x6a\xcd\x80\xad\x56\x2b\xbb\x02\x40\x69\xdc"
      "\xe2\x07\xaa\xcb\xd4\x1f\xa8\x2e\xd7\xf8\x40\xb2\x46\x7e\x57\xcb\x83\xd6"
      "\x3a\x72\x35\x53\x63\x8f\x70\x30\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x54\xce\xe1\x83\xd6\xff\x43\x55\x59\xff\x0f\xd5\x65\xfd\x3f\x54\x57\xbe"
      "\xfe\xff\x50\xc9\xf5\x00\xb6\x9f\x6b\x7c\x20\xd6\x58\xc9\x5f\xb8\xfe\x7f"
      "\xcd\xa3\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x80\xcd\x34\x3d\x7b\xfd"
      "\xd2\xe8\xe4\xe4\xc4\x35\x1b\xaf\xed\x8c\x6a\x6c\xe7\x46\xbd\x5e\xbf\x91"
      "\xfe\x15\xec\x94\xfa\xfc\xcb\x37\xf2\xa9\xf0\x3b\xa5\x3e\xcb\x36\xf2\xb5"
      "\x7e\x0f\x77\x54\x79\xef\x49\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x40\xb3\x7f\x02\x00\x00\xff\xff\xc9\xd6\x20"
      "\x2f",
      1512);
  syz_mount_image(
      /*fs=*/0x20000580, /*dir=*/0x20000040,
      /*flags=MS_PRIVATE|MS_STRICTATIME|MS_SILENT|MS_NOSUID*/ 0x1048002,
      /*opts=*/0x200010c0, /*chdir=*/1, /*size=*/0x5e8, /*img=*/0x20001b40);
  memcpy((void*)0x20000100, "./file0\000", 8);
  syscall(__NR_unlinkat, /*fd=*/0xffffff9c, /*path=*/0x20000100ul,
          /*flags=AT_REMOVEDIR*/ 0x200ul);
  close_fds();
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1,
          /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0x1000000ul,
          /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1,
          /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x21000000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1,
          /*offset=*/0ul);
  setup_sysctl();
  setup_binfmt_misc();
  setup_usb();
  setup_swap();
  use_temporary_dir();
  do_sandbox_none();
  return 0;
}