// https://syzkaller.appspot.com/bug?id=c5fa40d992b334ea85a59ec78b859306e921a3d0
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <arpa/inet.h>
#include <dirent.h>
#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <net/if.h>
#include <netinet/in.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/socket.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/genetlink.h>
#include <linux/if_addr.h>
#include <linux/if_link.h>
#include <linux/in6.h>
#include <linux/loop.h>
#include <linux/neighbour.h>
#include <linux/net.h>
#include <linux/netlink.h>
#include <linux/rtnetlink.h>
#include <linux/veth.h>

#ifndef __NR_memfd_create
#define __NR_memfd_create 319
#endif

static unsigned long long procid;

static __thread int clone_ongoing;
static __thread int skip_segv;
static __thread jmp_buf segv_env;

static void segv_handler(int sig, siginfo_t* info, void* ctx)
{
  if (__atomic_load_n(&clone_ongoing, __ATOMIC_RELAXED) != 0) {
    exit(sig);
  }
  uintptr_t addr = (uintptr_t)info->si_addr;
  const uintptr_t prog_start = 1 << 20;
  const uintptr_t prog_end = 100 << 20;
  int skip = __atomic_load_n(&skip_segv, __ATOMIC_RELAXED) != 0;
  int valid = addr < prog_start || addr > prog_end;
  if (skip && valid) {
    _longjmp(segv_env, 1);
  }
  exit(sig);
}

static void install_segv_handler(void)
{
  struct sigaction sa;
  memset(&sa, 0, sizeof(sa));
  sa.sa_handler = SIG_IGN;
  syscall(SYS_rt_sigaction, 0x20, &sa, NULL, 8);
  syscall(SYS_rt_sigaction, 0x21, &sa, NULL, 8);
  memset(&sa, 0, sizeof(sa));
  sa.sa_sigaction = segv_handler;
  sa.sa_flags = SA_NODEFER | SA_SIGINFO;
  sigaction(SIGSEGV, &sa, NULL);
  sigaction(SIGBUS, &sa, NULL);
}

#define NONFAILING(...)                                                        \
  ({                                                                           \
    int ok = 1;                                                                \
    __atomic_fetch_add(&skip_segv, 1, __ATOMIC_SEQ_CST);                       \
    if (_setjmp(segv_env) == 0) {                                              \
      __VA_ARGS__;                                                             \
    } else                                                                     \
      ok = 0;                                                                  \
    __atomic_fetch_sub(&skip_segv, 1, __ATOMIC_SEQ_CST);                       \
    ok;                                                                        \
  })

static void sleep_ms(uint64_t ms)
{
  usleep(ms * 1000);
}

static uint64_t current_time_ms(void)
{
  struct timespec ts;
  if (clock_gettime(CLOCK_MONOTONIC, &ts))
    exit(1);
  return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000;
}

static 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 void netlink_nest(struct nlmsg* nlmsg, int typ)
{
  struct nlattr* attr = (struct nlattr*)nlmsg->pos;
  attr->nla_type = typ;
  nlmsg->pos += sizeof(*attr);
  nlmsg->nested[nlmsg->nesting++] = attr;
}

static void netlink_done(struct nlmsg* nlmsg)
{
  struct nlattr* attr = nlmsg->nested[--nlmsg->nesting];
  attr->nla_len = nlmsg->pos - (char*)attr;
}

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 unsigned int queue_count = 2;

static void netlink_add_device_impl(struct nlmsg* nlmsg, const char* type,
                                    const char* name, bool up)
{
  struct ifinfomsg hdr;
  memset(&hdr, 0, sizeof(hdr));
  if (up)
    hdr.ifi_flags = hdr.ifi_change = IFF_UP;
  netlink_init(nlmsg, RTM_NEWLINK, NLM_F_EXCL | NLM_F_CREATE, &hdr,
               sizeof(hdr));
  if (name)
    netlink_attr(nlmsg, IFLA_IFNAME, name, strlen(name));
  netlink_attr(nlmsg, IFLA_NUM_TX_QUEUES, &queue_count, sizeof(queue_count));
  netlink_attr(nlmsg, IFLA_NUM_RX_QUEUES, &queue_count, sizeof(queue_count));
  netlink_nest(nlmsg, IFLA_LINKINFO);
  netlink_attr(nlmsg, IFLA_INFO_KIND, type, strlen(type));
}

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 struct nlmsg nlmsg;

//% 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;
}

#define FS_IOC_SETFLAGS _IOW('f', 2, long)
static void remove_dir(const char* dir)
{
  int iter = 0;
  DIR* dp = 0;
  const int umount_flags = MNT_FORCE | UMOUNT_NOFOLLOW;

retry:
  while (umount2(dir, umount_flags) == 0) {
  }
  dp = opendir(dir);
  if (dp == NULL) {
    if (errno == EMFILE) {
      exit(1);
    }
    exit(1);
  }
  struct dirent* ep = 0;
  while ((ep = readdir(dp))) {
    if (strcmp(ep->d_name, ".") == 0 || strcmp(ep->d_name, "..") == 0)
      continue;
    char filename[FILENAME_MAX];
    snprintf(filename, sizeof(filename), "%s/%s", dir, ep->d_name);
    while (umount2(filename, umount_flags) == 0) {
    }
    struct stat st;
    if (lstat(filename, &st))
      exit(1);
    if (S_ISDIR(st.st_mode)) {
      remove_dir(filename);
      continue;
    }
    int i;
    for (i = 0;; i++) {
      if (unlink(filename) == 0)
        break;
      if (errno == EPERM) {
        int fd = open(filename, O_RDONLY);
        if (fd != -1) {
          long flags = 0;
          if (ioctl(fd, FS_IOC_SETFLAGS, &flags) == 0) {
          }
          close(fd);
          continue;
        }
      }
      if (errno == EROFS) {
        break;
      }
      if (errno != EBUSY || i > 100)
        exit(1);
      if (umount2(filename, umount_flags))
        exit(1);
    }
  }
  closedir(dp);
  for (int i = 0;; i++) {
    if (rmdir(dir) == 0)
      break;
    if (i < 100) {
      if (errno == EPERM) {
        int fd = open(dir, O_RDONLY);
        if (fd != -1) {
          long flags = 0;
          if (ioctl(fd, FS_IOC_SETFLAGS, &flags) == 0) {
          }
          close(fd);
          continue;
        }
      }
      if (errno == EROFS) {
        break;
      }
      if (errno == EBUSY) {
        if (umount2(dir, umount_flags))
          exit(1);
        continue;
      }
      if (errno == ENOTEMPTY) {
        if (iter < 100) {
          iter++;
          goto retry;
        }
      }
    }
    exit(1);
  }
}

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");
  if (symlink("/dev/binderfs", "./binderfs")) {
  }
}

static void setup_sysctl()
{
  int cad_pid = fork();
  if (cad_pid < 0)
    exit(1);
  if (cad_pid == 0) {
    for (;;)
      sleep(100);
  }
  char tmppid[32];
  snprintf(tmppid, sizeof(tmppid), "%d", cad_pid);
  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", tmppid},
  };
  for (size_t i = 0; i < sizeof(files) / sizeof(files[0]); i++) {
    if (!write_file(files[i].name, files[i].data)) {
    }
  }
  kill(cad_pid, SIGKILL);
  while (waitpid(cad_pid, NULL, 0) != cad_pid)
    ;
}

#define NL802154_CMD_SET_SHORT_ADDR 11
#define NL802154_ATTR_IFINDEX 3
#define NL802154_ATTR_SHORT_ADDR 10

static const char* setup_802154()
{
  const char* error = NULL;
  int sock_generic = -1;
  int sock_route = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
  if (sock_route == -1) {
    error = "socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE) failed";
    goto fail;
  }
  sock_generic = socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC);
  if (sock_generic == -1) {
    error = "socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC) failed";
    goto fail;
  }
  {
    int nl802154_family_id =
        netlink_query_family_id(&nlmsg, sock_generic, "nl802154", true);
    if (nl802154_family_id < 0) {
      error = "netlink_query_family_id failed";
      goto fail;
    }
    for (int i = 0; i < 2; i++) {
      char devname[] = "wpan0";
      devname[strlen(devname) - 1] += i;
      uint64_t hwaddr = 0xaaaaaaaaaaaa0002 + (i << 8);
      uint16_t shortaddr = 0xaaa0 + i;
      int ifindex = if_nametoindex(devname);
      struct genlmsghdr genlhdr;
      memset(&genlhdr, 0, sizeof(genlhdr));
      genlhdr.cmd = NL802154_CMD_SET_SHORT_ADDR;
      netlink_init(&nlmsg, nl802154_family_id, 0, &genlhdr, sizeof(genlhdr));
      netlink_attr(&nlmsg, NL802154_ATTR_IFINDEX, &ifindex, sizeof(ifindex));
      netlink_attr(&nlmsg, NL802154_ATTR_SHORT_ADDR, &shortaddr,
                   sizeof(shortaddr));
      if (netlink_send(&nlmsg, sock_generic) < 0) {
        error = "NL802154_CMD_SET_SHORT_ADDR failed";
        goto fail;
      }
      netlink_device_change(&nlmsg, sock_route, devname, true, 0, &hwaddr,
                            sizeof(hwaddr), 0);
      if (i == 0) {
        netlink_add_device_impl(&nlmsg, "lowpan", "lowpan0", false);
        netlink_done(&nlmsg);
        netlink_attr(&nlmsg, IFLA_LINK, &ifindex, sizeof(ifindex));
        if (netlink_send(&nlmsg, sock_route) < 0) {
          error = "netlink: adding device lowpan0 type lowpan link wpan0";
          goto fail;
        }
      }
    }
  }
fail:
  close(sock_route);
  close(sock_generic);
  return error;
}

static void execute_one(void);

#define WAIT_FLAGS __WALL

static void loop(void)
{
  int iter = 0;
  for (;; iter++) {
    char cwdbuf[32];
    sprintf(cwdbuf, "./%d", iter);
    if (mkdir(cwdbuf, 0777))
      exit(1);
    reset_loop();
    int pid = fork();
    if (pid < 0)
      exit(1);
    if (pid == 0) {
      if (chdir(cwdbuf))
        exit(1);
      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;
    }
    remove_dir(cwdbuf);
  }
}

uint64_t r[1] = {0xffffffffffffffff};

void execute_one(void)
{
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  syz_mount_image$ext4 arguments: [
  //    fs: ptr[in, buffer] {
  //      buffer: {65 78 74 34 00} (length 0x5)
  //    }
  //    dir: ptr[in, buffer] {
  //      buffer: {2e 2f 66 69 6c 65 30 00} (length 0x8)
  //    }
  //    flags: mount_flags = 0x800700 (8 bytes)
  //    opts: ptr[in, fs_options[ext4_options]] {
  //      fs_options[ext4_options] {
  //        elems: array[fs_opt_elem[ext4_options]] {
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              data_err_ignore: buffer: {64 61 74 61 5f 65 72 72 3d 69 67 6e
  //              6f 72 65} (length 0xf)
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              dioread_nolock: buffer: {64 69 6f 72 65 61 64 5f 6e 6f 6c 6f
  //              63 6b} (length 0xe)
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              debug_want_extra_isize: fs_opt["debug_want_extra_isize",
  //              fmt[hex, int32]] {
  //                name: buffer: {64 65 62 75 67 5f 77 61 6e 74 5f 65 78 74 72
  //                61 5f 69 73 69 7a 65} (length 0x16) eq: const = 0x3d (1
  //                bytes) val: int32 = 0x5a (18 bytes)
  //              }
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              errors_remount: buffer: {65 72 72 6f 72 73 3d 72 65 6d 6f 75
  //              6e 74 2d 72 6f} (length 0x11)
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              max_dir_size_kb: fs_opt["max_dir_size_kb", fmt[hex, int32]] {
  //                name: buffer: {6d 61 78 5f 64 69 72 5f 73 69 7a 65 5f 6b 62}
  //                (length 0xf) eq: const = 0x3d (1 bytes) val: int32 =
  //                0x10000005 (18 bytes)
  //              }
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              nolazytime: buffer: {6e 6f 6c 61 7a 79 74 69 6d 65} (length
  //              0xa)
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              nobh: buffer: {6e 6f 62 68} (length 0x4)
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //        }
  //        common: array[fs_opt_elem[fs_options_common]] {
  //        }
  //        null: const = 0x0 (1 bytes)
  //      }
  //    }
  //    chdir: int8 = 0x1 (1 bytes)
  //    size: len = 0x46f (8 bytes)
  //    img: ptr[in, buffer] {
  //      buffer: (compressed buffer with length 0x46f)
  //    }
  //  ]
  //  returns fd_dir
  NONFAILING(memcpy((void*)0x200000000180, "ext4\000", 5));
  NONFAILING(memcpy((void*)0x200000000000, "./file0\000", 8));
  NONFAILING(memcpy((void*)0x200000000040, "data_err=ignore", 15));
  NONFAILING(*(uint8_t*)0x20000000004f = 0x2c);
  NONFAILING(memcpy((void*)0x200000000050, "dioread_nolock", 14));
  NONFAILING(*(uint8_t*)0x20000000005e = 0x2c);
  NONFAILING(memcpy((void*)0x20000000005f, "debug_want_extra_isize", 22));
  NONFAILING(*(uint8_t*)0x200000000075 = 0x3d);
  NONFAILING(sprintf((char*)0x200000000076, "0x%016llx", (long long)0x5a));
  NONFAILING(*(uint8_t*)0x200000000088 = 0x2c);
  NONFAILING(memcpy((void*)0x200000000089, "errors=remount-ro", 17));
  NONFAILING(*(uint8_t*)0x20000000009a = 0x2c);
  NONFAILING(memcpy((void*)0x20000000009b, "max_dir_size_kb", 15));
  NONFAILING(*(uint8_t*)0x2000000000aa = 0x3d);
  NONFAILING(
      sprintf((char*)0x2000000000ab, "0x%016llx", (long long)0x10000005));
  NONFAILING(*(uint8_t*)0x2000000000bd = 0x2c);
  NONFAILING(memcpy((void*)0x2000000000be, "nolazytime", 10));
  NONFAILING(*(uint8_t*)0x2000000000c8 = 0x2c);
  NONFAILING(memcpy((void*)0x2000000000c9, "nobh", 4));
  NONFAILING(*(uint8_t*)0x2000000000cd = 0x2c);
  NONFAILING(*(uint8_t*)0x2000000000ce = 0);
  NONFAILING(memcpy(
      (void*)0x200000000bc0,
      "\x78\x9c\xec\xdb\xcd\x6b\x1c\xe5\x1f\x00\xf0\xef\x4c\x5e\xda\xfe\xfa\x92"
      "\xfc\x6a\x7d\x69\xad\x1a\x2d\x42\x50\x4c\x9a\xb4\x6a\x0f\x5e\x14\x05\x91"
      "\x8a\x82\x1e\xea\x31\x26\xdb\x12\xba\x6d\xa4\x89\x62\x6b\xb1\xa9\x88\x27"
      "\x41\x0a\x7a\x16\x8f\xa2\x7f\x81\x37\x11\x44\x3d\x09\x5e\x3d\x79\x92\x42"
      "\xd1\x5e\xda\x7a\x8a\xcc\xec\x4c\xbb\xd9\x66\x13\x63\x36\x9d\x98\xfd\x7c"
      "\x60\x76\x9f\x67\xe6\xd9\x9d\xe7\xbb\xcf\xbc\x3c\xfb\x3c\xbb\x01\x74\xad"
      "\xa1\xec\x21\x89\xd8\x11\x11\xbf\x46\xc4\x40\x23\xbb\xb8\xc0\x50\xe3\xe9"
      "\xfa\xd5\xf3\x93\x37\xae\x9e\x9f\x4c\x62\x61\xe1\xb5\x3f\x92\xbc\xdc\xb5"
      "\xab\xe7\x27\xcb\xa2\xe5\xeb\xb6\x17\x99\xe1\x34\x22\xfd\x30\x29\x76\xb2"
      "\xd8\xec\xd9\x73\x27\x27\xea\xf5\xda\x99\x22\x3f\x3a\x77\xea\xad\xd1\xd9"
      "\xb3\xe7\x9e\x78\xe7\xd4\xc4\x89\xda\x89\xda\xe9\xf1\x23\x47\x0e\x1f\x1a"
      "\x7b\xfa\xa9\xf1\x27\x3b\x12\x67\x16\xd7\xb5\x7d\xef\xcf\xec\xdf\xfb\xe2"
      "\x1b\x97\x5e\x9e\x3c\x76\xe9\xcd\x1f\xbf\xce\xea\xbb\xa3\xd8\xde\x1c\x47"
      "\xa7\x0c\x65\x81\xff\xb9\x90\x6b\xdd\xf6\x68\xa7\x77\x56\xb1\x9d\x4d\xe9"
      "\xa4\xb7\xc2\x8a\xb0\x2a\x3d\x11\x91\x35\x57\x5f\x7e\xfe\x0f\x44\x4f\xdc"
      "\x6a\xbc\x81\x78\xe1\x83\x4a\x2b\x07\xac\xab\xec\xde\xb4\xa5\xfd\xe6\xf9"
      "\x05\x60\x13\x4b\xa2\xea\x1a\x00\xd5\x28\x6f\xf4\xd9\xf7\xdf\x72\xb9\x43"
      "\x5d\x8f\x0d\xe1\xca\xb3\x8d\x2f\x40\x59\xdc\xd7\x8b\xa5\xb1\xa5\x37\xd2"
      "\xa2\x4c\x5f\xcb\xf7\xdb\x4e\x1a\x8a\x88\x63\xf3\x7f\x7d\x9e\x2d\xb1\x4e"
      "\xe3\x10\x00\x00\xcd\x3e\x9e\xfc\xec\x68\x7f\x44\xbc\x77\xe3\xab\x97\xb2"
      "\xbe\xc7\x40\x44\x94\xe3\x41\xf7\xe4\x8f\xbf\xe5\x8f\xbb\x8a\x39\x94\xc1"
      "\x88\xf8\x7f\x44\xec\x8e\x88\xbb\x22\x62\x4f\x44\xdc\x5d\x94\xbd\x37\x22"
      "\xee\x5b\x63\x7d\x6e\xef\xff\xa4\x97\xd7\xf8\x96\xcb\xca\xfa\x7f\xcf\x14"
      "\x73\x5b\x8b\xfb\x7f\x65\xef\x2f\x06\x7b\x8a\xdc\xce\x3c\xfe\xbe\xe4\xf8"
      "\x74\xbd\x76\xb0\xf8\x4c\x86\xa3\x6f\x4b\x96\x1f\x5b\x66\x1f\xdf\x3e\xff"
      "\xcb\x27\xed\xb6\x35\xf7\xff\xb2\x25\xdb\x7f\xd9\x17\x2c\xea\x71\xb9\xb7"
      "\x65\x80\x6e\x6a\x62\x6e\x22\xef\x94\x76\xc0\x95\x8b\x11\xfb\x7a\x97\x8a"
      "\x3f\xb9\x39\x13\x90\x44\xc4\xde\x88\xd8\xb7\xba\xb7\xde\x55\x26\xa6\x1f"
      "\xfb\x72\x7f\xbb\x42\x2b\xc7\xbf\x8c\x0e\xcc\x33\x2d\x7c\x91\x85\x37\x9f"
      "\xc5\x3f\x1f\x2d\xf1\x97\x92\xe6\xf9\xc9\xe9\xdb\xe6\x27\x47\xb7\x46\xbd"
      "\x76\x70\xb4\x3c\x2a\x6e\xf7\xd3\xcf\x1f\xbd\xda\x6e\xff\x6b\x8a\xbf\x03"
      "\xae\xd4\x1a\xcf\x4d\xed\xdf\x5a\x64\x30\x69\x9e\xaf\x9d\xed\xec\xfe\xff"
      "\xe5\xf1\x9f\xf6\x27\xaf\xe7\xf3\xcc\xfd\xc5\xba\x77\x27\xe6\xe6\xce\x8c"
      "\x45\xf4\x27\x47\xf3\xfc\xa2\xf5\xe3\xb7\x5e\x5b\xe6\xcb\xf2\xd9\xf1\x3f"
      "\x7c\x60\xe9\xf3\x7f\x77\xf1\x9a\x2c\xfe\xfb\x23\x22\x3b\x88\x1f\x88\x88"
      "\x07\x23\xe2\xa1\xa2\xee\x0f\x47\xc4\x23\x11\x71\x60\x99\x18\x7f\x78\x6e"
      "\xe5\xf8\x23\xad\xa8\xfd\x2f\x46\x4c\x2d\x79\xfd\xbb\x79\xfc\xb7\xb4\xff"
      "\xea\x13\x3d\x27\xbf\xff\xa6\xdd\xfe\xff\x59\xfb\x1f\xce\x53\xc3\xc5\x9a"
      "\xfc\xfa\xb7\x82\xa5\xaa\x93\x5d\x2e\x5a\x2b\xb8\x96\xcf\x0e\x00\x00\x00"
      "\xfe\x2b\xd2\xfc\x37\xf0\x49\x3a\x72\x33\x9d\xa6\x23\x23\x8d\xdf\xf0\xef"
      "\x89\xff\xa5\xf5\x99\xd9\xb9\xc7\x8f\xcf\xbc\x7d\x7a\xaa\xf1\x5b\xf9\xc1"
      "\xe8\x4b\xcb\x91\xae\x81\x62\x3c\xb4\x3e\x5d\xaf\x8d\x25\xf3\xc5\x3b\x36"
      "\xc6\x47\xc7\x8b\xb1\xe2\x72\xbc\xf4\x50\x31\x6e\xfc\x69\xcf\xb6\x3c\x3f"
      "\x32\x39\x53\x9f\xaa\x38\x76\xe8\x76\xdb\xdb\x9c\xff\x99\xdf\x7b\xaa\xae"
      "\x1d\xb0\xce\xb6\x2d\xb9\x76\xbc\xff\x8e\x57\x04\xa8\x40\xeb\x3c\x7a\xba"
      "\x38\x7b\xe1\x95\x70\x31\x80\xcd\xca\xff\xb5\xa1\x7b\xad\x70\xfe\x37\xff"
      "\x0f\x06\xd8\x64\xdc\xff\xa1\x7b\x2d\x75\xfe\x5f\x68\xc9\x9b\x0b\x80\xcd"
      "\xc9\xfd\x1f\xba\x97\xf3\x1f\xba\x54\xfa\x5d\xd5\x35\x00\x2a\xe4\xfe\x0f"
      "\x5d\x69\x2d\xff\xeb\x5f\xc7\xc4\xd6\x8d\x51\x8d\x6a\x12\x1b\xb5\x51\xf2"
      "\x44\x44\x99\x48\x37\x44\x7d\x24\xd6\x29\x51\xf5\x95\x09\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\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\x33\xfe\x0e\x00\x00\xff\xff\x2b\x62\xe6"
      "\x8b",
      1135));
  NONFAILING(syz_mount_image(/*fs=*/0x200000000180, /*dir=*/0x200000000000,
                             /*flags=MS_I_VERSION|MS_NOATIME|0x300*/ 0x800700,
                             /*opts=*/0x200000000040, /*chdir=*/1,
                             /*size=*/0x46f, /*img=*/0x200000000bc0));
  //  syz_mount_image$ext4 arguments: [
  //    fs: ptr[in, buffer] {
  //      buffer: {65 78 74 34 00} (length 0x5)
  //    }
  //    dir: ptr[in, buffer] {
  //      buffer: {2e 2f 66 69 6c 65 31 00} (length 0x8)
  //    }
  //    flags: mount_flags = 0x2000000 (8 bytes)
  //    opts: ptr[in, fs_options[ext4_options]] {
  //      fs_options[ext4_options] {
  //        elems: array[fs_opt_elem[ext4_options]] {
  //        }
  //        common: array[fs_opt_elem[fs_options_common]] {
  //        }
  //        null: const = 0x0 (1 bytes)
  //      }
  //    }
  //    chdir: int8 = 0x11 (1 bytes)
  //    size: len = 0x56b (8 bytes)
  //    img: ptr[in, buffer] {
  //      buffer: (compressed buffer with length 0x56b)
  //    }
  //  ]
  //  returns fd_dir
  NONFAILING(memcpy((void*)0x200000000140, "ext4\000", 5));
  NONFAILING(memcpy((void*)0x2000000001c0, "./file1\000", 8));
  NONFAILING(*(uint8_t*)0x2000000009c0 = 0);
  NONFAILING(memcpy(
      (void*)0x200000000440,
      "\x78\x9c\xec\xdd\xcd\x6b\x1c\xe5\x1f\x00\xf0\xef\x6c\x36\xe9\xeb\xef\xd7"
      "\x14\x4a\x51\x11\x09\xf4\x60\xa5\x76\xd3\x24\xbe\x54\xf0\x50\x8f\xa2\xc5"
      "\x82\xde\xeb\x92\x4c\x43\xc9\xa6\x5b\xb2\x9b\xd2\xc4\x82\xed\xc1\x5e\xbc"
      "\x48\x11\x44\x2c\x88\x07\x6f\x7a\xf7\x58\xfc\x07\xbc\xf8\x2f\x14\xb4\x50"
      "\xa4\x04\x3d\x78\x89\xcc\x66\x36\xcd\xcb\x6e\xb2\x6d\x36\x2f\xed\x7e\x3e"
      "\x30\xe1\x79\x76\x66\xf7\x99\xef\xcc\x7c\x9f\x3c\xb3\xcf\x2e\x1b\x40\xcf"
      "\x1a\xca\xfe\x14\x22\x5e\x8c\x88\xaf\x92\x88\x23\x11\x91\xe4\xeb\x8a\x91"
      "\xaf\x1c\x5a\xda\x6e\xe1\xd1\x8d\xf1\x6c\x49\x62\x71\xf1\xe3\xbf\x92\xc6"
      "\x76\x59\xbd\xf9\x5a\xcd\xe7\x1d\xca\x2b\x2f\x44\xc4\xaf\x5f\x44\x9c\x2a"
      "\xac\x6f\xb7\x36\x37\x3f\x55\xae\x54\xd2\x99\xbc\x3e\x5c\x9f\xbe\x3a\x5c"
      "\x9b\x9b\x3f\x7d\x79\xba\x3c\x99\x4e\xa6\x57\x46\xc7\xc6\xce\xbe\x39\x36"
      "\xfa\xce\xdb\x6f\x75\x2d\xd6\xd7\x2e\xfc\xf3\xed\x47\xf7\xde\x3f\xfb\xe5"
      "\x89\x85\x6f\x7e\x7e\x70\xf4\x4e\x12\xe7\xe2\x70\xbe\x6e\x65\x1c\x5b\x70"
      "\x73\x65\x65\x28\x86\xf2\x63\xd2\x1f\xe7\xd6\x6c\x38\xd2\x85\xc6\xf6\x92"
      "\x64\xb7\x77\x80\xa7\xd2\x97\xe7\x79\x7f\x64\x7d\xc0\x91\xe8\xcb\xb3\xbe"
      "\x95\x1f\x0f\xec\xe8\xae\x01\xdb\xec\xf3\x88\x58\x04\x7a\x54\x22\xff\xa1"
      "\x47\x35\xc7\x01\xcd\x7b\xfb\x2e\xdd\x07\x3f\x33\x1e\xbe\xb7\x74\x03\xb4"
      "\x3e\xfe\xe2\xd2\x7b\x23\xb1\xbf\x71\x6f\x74\x70\x21\x59\x75\x67\x94\xdd"
      "\xef\x0e\x76\xa1\xfd\xac\x8d\x5f\xfe\xbc\x7b\x27\x5b\xa2\x7b\xef\x43\x00"
      "\x6c\xea\xe6\xad\x88\x38\x53\x2c\xae\xef\xff\x92\xbc\xff\x7b\x7a\x67\x3a"
      "\xd8\x66\x6d\x1b\xfa\x3f\xd8\x39\xf7\xb2\xf1\xcf\xeb\xeb\xc6\x3f\x03\xb1"
      "\x9c\x9b\xfb\x1b\x7f\xd7\x8e\x7f\x0e\xb5\xc8\xdd\xa7\xb1\x79\xfe\x17\x1e"
      "\x74\xa1\x99\xb6\xb2\xf1\xdf\xbb\x2d\xc7\xbf\xcb\x93\x56\x83\x7d\x79\xed"
      "\x7f\x8d\x31\x5f\x7f\x72\xe9\x72\x25\xcd\xfa\xb6\xff\x47\xc4\xc9\xe8\xdf"
      "\x97\xd5\x37\x9a\xcf\x39\xbb\x70\x7f\xb1\xdd\xba\x95\xe3\xbf\x6c\xc9\xda"
      "\x6f\x8e\x05\xf3\xfd\x78\x50\xdc\xb7\xfa\x39\x13\xe5\x7a\x79\x2b\x31\xaf"
      "\xf4\xf0\x56\xc4\x4b\x2d\xc7\xbf\xc9\xf2\xf9\x4f\x5a\x9c\xff\xec\x78\x5c"
      "\xe8\xb0\x8d\xe3\xe9\xdd\x57\xda\xad\xdb\x3c\xfe\xed\xb5\xf8\x43\xc4\xab"
      "\x2d\xcf\xff\xe3\x19\xad\x64\xe3\xf9\xc9\xe1\xc6\xf5\x30\xdc\xbc\x2a\xd6"
      "\xfb\xfb\xf6\xf1\xdf\xda\xb5\xbf\xdb\xf1\x67\xe7\xff\xe0\xc6\xf1\x0f\x26"
      "\x2b\xe7\x6b\x6b\x4f\xde\xc6\xf7\xfb\xff\x4d\xdb\xad\x5b\x15\x7f\x74\x7e"
      "\xfd\x0f\x24\x9f\x34\xca\x03\xf9\x63\xd7\xcb\xf5\xfa\xcc\x48\xc4\x40\xf2"
      "\xe1\xfa\xc7\x47\x1f\x3f\xb7\x59\x6f\x6e\x9f\xc5\x7f\xf2\x44\xeb\xfc\xdf"
      "\xe8\xfa\x3f\x10\x11\x9f\x76\x18\xff\xed\x63\x3f\xbd\xdc\x51\xfc\xbb\x74"
      "\xfe\x27\x9e\xe8\xfc\x3f\x79\xe1\xfe\x07\x9f\x7d\xd7\xae\xfd\xce\xfa\xbf"
      "\x37\x1a\xa5\x93\xf9\x23\x9d\xf4\x7f\x9d\xee\xe0\x56\x8e\x1d\x00\x00\x00"
      "\x00\x00\x00\xec\x35\x85\x88\x38\x1c\x49\xa1\xb4\x5c\x2e\x14\x4a\xa5\xa5"
      "\xcf\x77\x1c\x8b\x83\x85\x4a\xb5\x56\x3f\x75\xa9\x3a\x7b\x65\x22\x1a\xdf"
      "\x95\x1d\x8c\xfe\x42\x73\xa6\xfb\xc8\x8a\xcf\x43\x8c\xe4\x9f\x87\x6d\xd6"
      "\x47\xd7\xd4\xc7\x22\xe2\x68\x44\x7c\xdd\x77\xa0\x51\x2f\x8d\x57\x2b\x13"
      "\xbb\x1d\x3c\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\xec\x11\x87\xda\x7c\xff\x3f\xf3\x47\xdf\x6e\xef\x1d\xb0\xed\xda\xff\xe4"
      "\x37\xf0\xbc\xdb\x34\xff\xbb\xf1\x4b\x4f\xc0\x9e\xe4\xff\x3f\xf4\x2e\xf9"
      "\x0f\xbd\x4b\xfe\x43\xef\x92\xff\xd0\xbb\xe4\x3f\xf4\x2e\xf9\x0f\xbd\x4b"
      "\xfe\x43\xef\x92\xff\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\xd0\x55\x17\xce\x9f\xcf\x96\xc5\x85\x47"
      "\x37\xc6\xb3\xfa\xc4\xb5\xb9\xd9\xa9\xea\xb5\xd3\x13\x69\x6d\xaa\x34\x3d"
      "\x3b\x5e\x1a\xaf\xce\x5c\x2d\x4d\x56\xab\x93\x95\xb4\x34\x5e\x9d\xde\xec"
      "\xf5\x2a\xd5\xea\xd5\x91\xd1\x98\xbd\x3e\x5c\x4f\x6b\xf5\xe1\xda\xdc\xfc"
      "\xc5\xe9\xea\xec\x95\xfa\xc5\xcb\xd3\xe5\xc9\xf4\x62\xda\xbf\x23\x51\x01"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xc0\xb3\xa5\x36"
      "\x37\x3f\x55\xae\x54\xd2\x19\x85\xe7\xb3\xf0\xfb\x76\x37\x51\xdc\xea\xeb"
      "\x14\x23\x62\x0f\x1c\x28\x85\xd5\x85\xdd\xee\x99\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\xe0\xb1\xff\x02\x00\x00\xff\xff\xb0\x87\x37"
      "\x3c",
      1387));
  NONFAILING(syz_mount_image(/*fs=*/0x200000000140, /*dir=*/0x2000000001c0,
                             /*flags=MS_LAZYTIME*/ 0x2000000,
                             /*opts=*/0x2000000009c0, /*chdir=*/0x11,
                             /*size=*/0x56b, /*img=*/0x200000000440));
  //  openat arguments: [
  //    fd: fd_dir (resource)
  //    file: nil
  //    flags: open_flags = 0x181242 (4 bytes)
  //    mode: open_mode = 0x148 (2 bytes)
  //  ]
  //  returns fd
  res = syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0ul,
                /*flags=O_TRUNC|O_SYNC|O_CREAT|O_CLOEXEC|O_RDWR*/ 0x181242,
                /*mode=S_IXGRP|S_IXUSR|S_IRUSR*/ 0x148);
  if (res != -1)
    r[0] = res;
  //  pwrite64 arguments: [
  //    fd: fd (resource)
  //    buf: ptr[in, buffer] {
  //      buffer: {a6} (length 0x1)
  //    }
  //    count: len = 0x1 (8 bytes)
  //    pos: intptr = 0xfecc (8 bytes)
  //  ]
  NONFAILING(memset((void*)0x200000000100, 166, 1));
  syscall(__NR_pwrite64, /*fd=*/r[0], /*buf=*/0x200000000100ul, /*count=*/1ul,
          /*pos=*/0xfeccul);
}
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);
  setup_sysctl();
  const char* reason;
  (void)reason;
  if ((reason = setup_802154()))
    printf("the reproducer may not work as expected: 802154 injection setup "
           "failed: %s\n",
           reason);
  install_segv_handler();
  for (procid = 0; procid < 5; procid++) {
    if (fork() == 0) {
      use_temporary_dir();
      loop();
    }
  }
  sleep(1000000);
  return 0;
}