// https://syzkaller.appspot.com/bug?id=7c4cc060d09a7646c4207fffaa4e66cda438a9d8
// 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 <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/mount.h>
#include <sys/prctl.h>
#include <sys/resource.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/sysmacros.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/uio.h>
#include <sys/wait.h>
#include <unistd.h>

#include <linux/capability.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/neighbour.h>
#include <linux/net.h>
#include <linux/netlink.h>
#include <linux/rtnetlink.h>
#include <linux/tcp.h>
#include <linux/veth.h>

#ifndef __NR_mmap
#define __NR_mmap 222
#endif
#ifndef __NR_setsockopt
#define __NR_setsockopt 208
#endif
#ifndef __NR_socket
#define __NR_socket 198
#endif

#define BITMASK(bf_off, bf_len) (((1ull << (bf_len)) - 1) << (bf_off))
#define STORE_BY_BITMASK(type, htobe, addr, val, bf_off, bf_len)               \
  *(type*)(addr) =                                                             \
      htobe((htobe(*(type*)(addr)) & ~BITMASK((bf_off), (bf_len))) |           \
            (((type)(val) << (bf_off)) & BITMASK((bf_off), (bf_len))))

struct csum_inet {
  uint32_t acc;
};

static void csum_inet_init(struct csum_inet* csum)
{
  csum->acc = 0;
}

static void csum_inet_update(struct csum_inet* csum, const uint8_t* data,
                             size_t length)
{
  if (length == 0)
    return;
  size_t i = 0;
  for (; i < length - 1; i += 2)
    csum->acc += *(uint16_t*)&data[i];
  if (length & 1)
    csum->acc += le16toh((uint16_t)data[length - 1]);
  while (csum->acc > 0xffff)
    csum->acc = (csum->acc & 0xffff) + (csum->acc >> 16);
}

static uint16_t csum_inet_digest(struct csum_inet* csum)
{
  return ~csum->acc;
}

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 correct_dev_net_tun(void)
{
  struct stat st;
  if (stat("/dev/net/tun", &st) == 0) {
    if (S_ISCHR(st.st_mode) && major(st.st_rdev) == 10 &&
        minor(st.st_rdev) == 200)
      return;
    if (unlink("/dev/net/tun")) {
    }
  }
  if (mkdir("/dev/net", 0755) && errno != EEXIST) {
  }
  if (mknod("/dev/net/tun", S_IFCHR | 0666, makedev(10, 200))) {
  }
  if (chmod("/dev/net/tun", 0666)) {
  }
}

static void initialize_tun(void)
{
  correct_dev_net_tun();
  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 long syz_emit_ethernet(volatile long a0, volatile long a1,
                              volatile long a2)
{
  if (tunfd < 0)
    return (uintptr_t)-1;
  uint32_t length = a0;
  char* data = (char*)a1;
  return write(tunfd, data, length);
}

static void setup_gadgetfs();
static void setup_binderfs();
static void setup_fusectl();
static void sandbox_common_mount_tmpfs(void)
{
  write_file("/proc/sys/fs/mount-max", "100000");
  if (mkdir("./syz-tmp", 0777))
    exit(1);
  if (mount("", "./syz-tmp", "tmpfs", 0, NULL))
    exit(1);
  if (mkdir("./syz-tmp/newroot", 0777))
    exit(1);
  if (mkdir("./syz-tmp/newroot/dev", 0700))
    exit(1);
  unsigned bind_mount_flags = MS_BIND | MS_REC | MS_PRIVATE;
  if (mount("/dev", "./syz-tmp/newroot/dev", NULL, bind_mount_flags, NULL))
    exit(1);
  if (mkdir("./syz-tmp/newroot/proc", 0700))
    exit(1);
  if (mount("syz-proc", "./syz-tmp/newroot/proc", "proc", 0, NULL))
    exit(1);
  if (mkdir("./syz-tmp/newroot/selinux", 0700))
    exit(1);
  const char* selinux_path = "./syz-tmp/newroot/selinux";
  if (mount("/selinux", selinux_path, NULL, bind_mount_flags, NULL)) {
    if (errno != ENOENT)
      exit(1);
    if (mount("/sys/fs/selinux", selinux_path, NULL, bind_mount_flags, NULL) &&
        errno != ENOENT)
      exit(1);
  }
  if (mkdir("./syz-tmp/newroot/sys", 0700))
    exit(1);
  if (mount("/sys", "./syz-tmp/newroot/sys", 0, bind_mount_flags, NULL))
    exit(1);
  if (mount("/sys/kernel/debug", "./syz-tmp/newroot/sys/kernel/debug", NULL,
            bind_mount_flags, NULL) &&
      errno != ENOENT)
    exit(1);
  if (mount("/sys/fs/smackfs", "./syz-tmp/newroot/sys/fs/smackfs", NULL,
            bind_mount_flags, NULL) &&
      errno != ENOENT)
    exit(1);
  if (mount("/proc/sys/fs/binfmt_misc",
            "./syz-tmp/newroot/proc/sys/fs/binfmt_misc", NULL, bind_mount_flags,
            NULL) &&
      errno != ENOENT)
    exit(1);
  if (mkdir("./syz-tmp/newroot/syz-inputs", 0700))
    exit(1);
  if (mount("/syz-inputs", "./syz-tmp/newroot/syz-inputs", NULL,
            bind_mount_flags | MS_RDONLY, NULL) &&
      errno != ENOENT)
    exit(1);
  if (mkdir("./syz-tmp/pivot", 0777))
    exit(1);
  if (syscall(SYS_pivot_root, "./syz-tmp", "./syz-tmp/pivot")) {
    if (chdir("./syz-tmp"))
      exit(1);
  } else {
    if (chdir("/"))
      exit(1);
    if (umount2("./pivot", MNT_DETACH))
      exit(1);
  }
  if (chroot("./newroot"))
    exit(1);
  if (chdir("/"))
    exit(1);
  setup_gadgetfs();
  setup_binderfs();
  setup_fusectl();
}

static void setup_gadgetfs()
{
  if (mkdir("/dev/gadgetfs", 0777)) {
  }
  if (mount("gadgetfs", "/dev/gadgetfs", "gadgetfs", 0, NULL)) {
  }
}

static void setup_fusectl()
{
  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)) {
  }
  if (symlink("/dev/binderfs", "./binderfs")) {
  }
}

static void loop();

static void sandbox_common()
{
  prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
  if (getppid() == 1)
    exit(1);
  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);
  sandbox_common();
  drop_caps();
  if (unshare(CLONE_NEWNET)) {
  }
  write_file("/proc/sys/net/ipv4/ping_group_range", "0 65535");
  initialize_tun();
  sandbox_common_mount_tmpfs();
  loop();
  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)) {
  }
  //  socket$inet6 arguments: [
  //    domain: const = 0xa (8 bytes)
  //    type: socket_type = 0x3 (8 bytes)
  //    proto: int32 = 0xff (4 bytes)
  //  ]
  //  returns sock_in6
  res = syscall(__NR_socket, /*domain=*/0xaul, /*type=SOCK_RAW*/ 3ul,
                /*proto=*/0xff);
  if (res != -1)
    r[0] = res;
  //  setsockopt$IP6T_SO_SET_REPLACE arguments: [
  //    fd: sock_in6 (resource)
  //    level: const = 0x29 (4 bytes)
  //    opt: const = 0x40 (4 bytes)
  //    val: ptr[in, ip6t_replace] {
  //      union ip6t_replace {
  //        filter: ip6t_replace_t["filter", 3, 4, IPT_FILTER_VALID_HOOKS,
  //        ip6t_filter_matches, ip6t_filter_targets, ipt_unused, ipt_hook,
  //        ipt_hook, ipt_hook, ipt_unused, ipt_unused, ipt_hook, ipt_hook,
  //        ipt_hook, ipt_unused] {
  //          name: buffer: {66 69 6c 74 65 72 00 00 00 00 00 00 00 00 00 00 00
  //          00 00 00 00 00 00 00 00 00 00 00 00 00 00 00} (length 0x20)
  //          valid_hooks: const = 0xe (4 bytes)
  //          num_entries: const = 0x4 (4 bytes)
  //          size: bytesize = 0x358 (4 bytes)
  //          hook_pre_routing: const = 0xffffffff (4 bytes)
  //          hook_local_in: const = 0xd0 (4 bytes)
  //          hook_forward: const = 0x1b8 (4 bytes)
  //          hook_local_out: const = 0x0 (4 bytes)
  //          hook_post_routing: const = 0xffffffff (4 bytes)
  //          underflow_pre_routing: const = 0xffffffff (4 bytes)
  //          underflow_local_in: const = 0x288 (4 bytes)
  //          underflow_forward: const = 0x288 (4 bytes)
  //          underflow_local_out: const = 0x288 (4 bytes)
  //          underflow_post_routing: const = 0xffffffff (4 bytes)
  //          num_counters: const = 0x4 (4 bytes)
  //          counters: nil
  //          entries: ip6t_replace_entries[3, ip6t_filter_matches,
  //          ip6t_filter_targets] {
  //            entries: array[ip6t_entry[ip6t_filter_matches,
  //            ip6t_filter_targets]] {
  //              ip6t_entry[ip6t_filter_matches, ip6t_filter_targets] {
  //                matches: ip6t_entry_matches[ip6t_filter_matches] {
  //                  ipv6: union ip6t_ip6_or_uncond {
  //                    uncond: buffer: {00 00 00 00 00 00 00 00 00 00 00 00 00
  //                    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  //                    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  //                    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  //                    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  //                    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  //                    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  //                    00 00 00 00 00 00 00 00 00} (length 0x88)
  //                  }
  //                  nfcache: const = 0x0 (4 bytes)
  //                  target_offset: len = 0xa8 (2 bytes)
  //                  next_offset: len = 0xd0 (2 bytes)
  //                  comefrom: const = 0x0 (4 bytes)
  //                  pad = 0x0 (4 bytes)
  //                  counters: xt_counters {
  //                    pcnt: const = 0x0 (8 bytes)
  //                    bcnt: const = 0x0 (8 bytes)
  //                  }
  //                  matches: array[ip6t_filter_matches] {
  //                  }
  //                }
  //                target: union ip6t_filter_targets {
  //                  common: union ip6t_targets {
  //                    unspec: union xt_unspec_targets {
  //                      STANDARD: xt_target_t["", flags[nf_verdicts, int32],
  //                      0] {
  //                        target_size: len = 0x28 (2 bytes)
  //                        name: buffer: {00 00 00 00 00 00 00 00 00 00 00 00
  //                        00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00}
  //                        (length 0x1d) revision: const = 0x0 (1 bytes) data:
  //                        nf_verdicts = 0x1b8 (4 bytes) pad = 0x0 (4 bytes)
  //                      }
  //                    }
  //                  }
  //                }
  //              }
  //              ip6t_entry[ip6t_filter_matches, ip6t_filter_targets] {
  //                matches: ip6t_entry_matches[ip6t_filter_matches] {
  //                  ipv6: union ip6t_ip6_or_uncond {
  //                    uncond: buffer: {00 00 00 00 00 00 00 00 00 00 00 00 00
  //                    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  //                    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  //                    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  //                    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  //                    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  //                    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  //                    00 00 00 00 00 00 00 00 00} (length 0x88)
  //                  }
  //                  nfcache: const = 0x0 (4 bytes)
  //                  target_offset: len = 0xa8 (2 bytes)
  //                  next_offset: len = 0xe8 (2 bytes)
  //                  comefrom: const = 0x0 (4 bytes)
  //                  pad = 0x0 (4 bytes)
  //                  counters: xt_counters {
  //                    pcnt: const = 0x0 (8 bytes)
  //                    bcnt: const = 0x0 (8 bytes)
  //                  }
  //                  matches: array[ip6t_filter_matches] {
  //                  }
  //                }
  //                target: union ip6t_filter_targets {
  //                  common: union ip6t_targets {
  //                    unspec: union xt_unspec_targets {
  //                      ERROR: xt_target_t["ERROR", array[int8,
  //                      XT_FUNCTION_MAXNAMELEN], 0] {
  //                        target_size: len = 0x40 (2 bytes)
  //                        name: buffer: {45 52 52 4f 52 00 00 00 00 00 00 00
  //                        00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00}
  //                        (length 0x1d) revision: const = 0x0 (1 bytes) data:
  //                        buffer: {b6 0a a8 29 39 6d 98 8b c9 68 6f 9c ca 6b
  //                        4a 0a 7e de 93 86 6e 0a 2f ab b9 b8 3f d7 a9 35}
  //                        (length 0x1e) pad = 0x0 (2 bytes)
  //                      }
  //                    }
  //                  }
  //                }
  //              }
  //              ip6t_entry[ip6t_filter_matches, ip6t_filter_targets] {
  //                matches: ip6t_entry_matches[ip6t_filter_matches] {
  //                  ipv6: union ip6t_ip6_or_uncond {
  //                    ipv6: ip6t_ip6 {
  //                      src: union ipv6_addr {
  //                        empty: ipv6_addr_empty {
  //                          a0: buffer: {00 00 00 00 00 00 00 00 00 00 00 00
  //                          00 00 00 00} (length 0x10)
  //                        }
  //                      }
  //                      dst: union ipv6_addr {
  //                        empty: ipv6_addr_empty {
  //                          a0: buffer: {00 00 00 00 00 00 00 00 00 00 00 00
  //                          00 00 00 00} (length 0x10)
  //                        }
  //                      }
  //                      smsk: array[ipv4_addr_mask_vals] {
  //                        ipv4_addr_mask_vals = 0x0 (4 bytes)
  //                        ipv4_addr_mask_vals = 0x0 (4 bytes)
  //                        ipv4_addr_mask_vals = 0x0 (4 bytes)
  //                        ipv4_addr_mask_vals = 0x0 (4 bytes)
  //                      }
  //                      dmsk: array[ipv4_addr_mask_vals] {
  //                        ipv4_addr_mask_vals = 0x0 (4 bytes)
  //                        ipv4_addr_mask_vals = 0x0 (4 bytes)
  //                        ipv4_addr_mask_vals = 0x0 (4 bytes)
  //                        ipv4_addr_mask_vals = 0x0 (4 bytes)
  //                      }
  //                      iniface: buffer: {00 00 00 00 00 00 00 00 00 00 00 00
  //                      00 00 00 00} (length 0x10) outiface: buffer: {00 00 00
  //                      00 00 00 00 00 00 00 00 00 00 00 00 00} (length 0x10)
  //                      iniface_mask: devname_mask {
  //                        lo: devname_mask_values = 0x0 (1 bytes)
  //                        pad = 0x0 (15 bytes)
  //                      }
  //                      outiface_mask: devname_mask {
  //                        lo: devname_mask_values = 0x0 (1 bytes)
  //                        pad = 0x0 (15 bytes)
  //                      }
  //                      proto: ipv6_types = 0x0 (2 bytes)
  //                      tos: int8 = 0x0 (1 bytes)
  //                      flags: ip6t_ip6_flags = 0x0 (1 bytes)
  //                      invflags: ip6t_ip6_invflags = 0x0 (1 bytes)
  //                      pad = 0x0 (3 bytes)
  //                    }
  //                  }
  //                  nfcache: const = 0x0 (4 bytes)
  //                  target_offset: len = 0xa8 (2 bytes)
  //                  next_offset: len = 0xd0 (2 bytes)
  //                  comefrom: const = 0x0 (4 bytes)
  //                  pad = 0x0 (4 bytes)
  //                  counters: xt_counters {
  //                    pcnt: const = 0x0 (8 bytes)
  //                    bcnt: const = 0x0 (8 bytes)
  //                  }
  //                  matches: array[ip6t_filter_matches] {
  //                  }
  //                }
  //                target: union ip6t_filter_targets {
  //                  REJECT: xt_target_t["REJECT", ip6t_reject_info, 0] {
  //                    target_size: len = 0x28 (2 bytes)
  //                    name: buffer: {52 45 4a 45 43 54 00 00 00 00 00 00 00 00
  //                    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00} (length
  //                    0x1d) revision: const = 0x0 (1 bytes) data:
  //                    ip6t_reject_info {
  //                      with: ip6t_reject_with = 0x4 (4 bytes)
  //                    }
  //                    pad = 0x0 (4 bytes)
  //                  }
  //                }
  //              }
  //            }
  //            underflow: ip6t_entry_underflow {
  //              matches: ip6t_entry_underflow_matches {
  //                ipv6: buffer: {00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  //                00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  //                00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  //                00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  //                00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  //                00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  //                00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  //                00} (length 0x88) nfcache: const = 0x0 (4 bytes)
  //                target_offset: len = 0xa8 (2 bytes)
  //                next_offset: len = 0xd0 (2 bytes)
  //                comefrom: const = 0x0 (4 bytes)
  //                pad = 0x0 (4 bytes)
  //                counters: xt_counters {
  //                  pcnt: const = 0x0 (8 bytes)
  //                  bcnt: const = 0x0 (8 bytes)
  //                }
  //              }
  //              target: xt_target_t["", const[NF_ACCEPT_VERDICT, int32], 0] {
  //                target_size: len = 0x28 (2 bytes)
  //                name: buffer: {00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  //                00 00 00 00 00 00 00 00 00 00 00 00 00 00} (length 0x1d)
  //                revision: const = 0x0 (1 bytes)
  //                data: const = 0xfffffffe (4 bytes)
  //                pad = 0x0 (4 bytes)
  //              }
  //            }
  //          }
  //        }
  //      }
  //    }
  //    len: len = 0x3b8 (8 bytes)
  //  ]
  memcpy((void*)0x200004c0,
         "filter\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
         "\000\000\000\000\000\000\000\000\000\000\000",
         32);
  *(uint32_t*)0x200004e0 = 0xe;
  *(uint32_t*)0x200004e4 = 4;
  *(uint32_t*)0x200004e8 = 0x358;
  *(uint32_t*)0x200004ec = -1;
  *(uint32_t*)0x200004f0 = 0xd0;
  *(uint32_t*)0x200004f4 = 0x1b8;
  *(uint32_t*)0x200004f8 = 0;
  *(uint32_t*)0x200004fc = -1;
  *(uint32_t*)0x20000500 = -1;
  *(uint32_t*)0x20000504 = 0x288;
  *(uint32_t*)0x20000508 = 0x288;
  *(uint32_t*)0x2000050c = 0x288;
  *(uint32_t*)0x20000510 = -1;
  *(uint32_t*)0x20000514 = 4;
  *(uint64_t*)0x20000518 = 0;
  memset((void*)0x20000520, 0, 136);
  *(uint32_t*)0x200005a8 = 0;
  *(uint16_t*)0x200005ac = 0xa8;
  *(uint16_t*)0x200005ae = 0xd0;
  *(uint32_t*)0x200005b0 = 0;
  *(uint64_t*)0x200005b8 = 0;
  *(uint64_t*)0x200005c0 = 0;
  *(uint16_t*)0x200005c8 = 0x28;
  memset((void*)0x200005ca, 0, 29);
  *(uint8_t*)0x200005e7 = 0;
  *(uint32_t*)0x200005e8 = 0x1b8;
  memset((void*)0x200005f0, 0, 136);
  *(uint32_t*)0x20000678 = 0;
  *(uint16_t*)0x2000067c = 0xa8;
  *(uint16_t*)0x2000067e = 0xe8;
  *(uint32_t*)0x20000680 = 0;
  *(uint64_t*)0x20000688 = 0;
  *(uint64_t*)0x20000690 = 0;
  *(uint16_t*)0x20000698 = 0x40;
  memcpy((void*)0x2000069a,
         "ERROR\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
         "\000\000\000\000\000\000\000\000",
         29);
  *(uint8_t*)0x200006b7 = 0;
  memcpy((void*)0x200006b8,
         "\xb6\x0a\xa8\x29\x39\x6d\x98\x8b\xc9\x68\x6f\x9c\xca\x6b\x4a\x0a\x7e"
         "\xde\x93\x86\x6e\x0a\x2f\xab\xb9\xb8\x3f\xd7\xa9\x35",
         30);
  memset((void*)0x200006d8, 0, 16);
  memset((void*)0x200006e8, 0, 16);
  *(uint32_t*)0x200006f8 = htobe32(0);
  *(uint32_t*)0x200006fc = htobe32(0);
  *(uint32_t*)0x20000700 = htobe32(0);
  *(uint32_t*)0x20000704 = htobe32(0);
  *(uint32_t*)0x20000708 = htobe32(0);
  *(uint32_t*)0x2000070c = htobe32(0);
  *(uint32_t*)0x20000710 = htobe32(0);
  *(uint32_t*)0x20000714 = htobe32(0);
  memset((void*)0x20000718, 0, 16);
  memset((void*)0x20000728, 0, 16);
  *(uint8_t*)0x20000738 = 0;
  *(uint8_t*)0x20000748 = 0;
  *(uint16_t*)0x20000758 = 0;
  *(uint8_t*)0x2000075a = 0;
  *(uint8_t*)0x2000075b = 0;
  *(uint8_t*)0x2000075c = 0;
  *(uint32_t*)0x20000760 = 0;
  *(uint16_t*)0x20000764 = 0xa8;
  *(uint16_t*)0x20000766 = 0xd0;
  *(uint32_t*)0x20000768 = 0;
  *(uint64_t*)0x20000770 = 0;
  *(uint64_t*)0x20000778 = 0;
  *(uint16_t*)0x20000780 = 0x28;
  memcpy((void*)0x20000782,
         "REJECT\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
         "\000\000\000\000\000\000\000\000",
         29);
  *(uint8_t*)0x2000079f = 0;
  *(uint32_t*)0x200007a0 = 4;
  memset((void*)0x200007a8, 0, 136);
  *(uint32_t*)0x20000830 = 0;
  *(uint16_t*)0x20000834 = 0xa8;
  *(uint16_t*)0x20000836 = 0xd0;
  *(uint32_t*)0x20000838 = 0;
  *(uint64_t*)0x20000840 = 0;
  *(uint64_t*)0x20000848 = 0;
  *(uint16_t*)0x20000850 = 0x28;
  memset((void*)0x20000852, 0, 29);
  *(uint8_t*)0x2000086f = 0;
  *(uint32_t*)0x20000870 = 0xfffffffe;
  syscall(__NR_setsockopt, /*fd=*/r[0], /*level=*/0x29, /*opt=*/0x40,
          /*val=*/0x200004c0ul, /*len=*/0x3b8ul);
  //  syz_emit_ethernet arguments: [
  //    len: len = 0x4a (8 bytes)
  //    packet: ptr[in, eth_packet] {
  //      eth_packet {
  //        dst_mac: union mac_addr {
  //          local: mac_addr_t[const[0xaa, int8]] {
  //            a0: buffer: {aa aa aa aa aa} (length 0x5)
  //            a1: const = 0xaa (1 bytes)
  //          }
  //        }
  //        src_mac: union mac_addr {
  //          local: mac_addr_t[const[0xaa, int8]] {
  //            a0: buffer: {aa aa aa aa aa} (length 0x5)
  //            a1: const = 0xaa (1 bytes)
  //          }
  //        }
  //        vtag: union optional[vlan_tag] {
  //          void: buffer: {} (length 0x0)
  //        }
  //        payload: eth_payload {
  //          eth2: union eth2_packet {
  //            ipv6: eth2_packet_t[ETH_P_IPV6, ipv6_packet] {
  //              etype: const = 0x86dd (2 bytes)
  //              payload: union ipv6_packet {
  //                tcp: ipv6_packet_t[const[IPPROTO_TCP, int8], tcp_packet] {
  //                  priority: int8 = 0x0 (0 bytes)
  //                  version: const = 0x6 (1 bytes)
  //                  flow_label: buffer: {e0 ff ac} (length 0x3)
  //                  length: len = 0x14 (2 bytes)
  //                  next_header: const = 0x2c (1 bytes)
  //                  hop_limit: hop_limits = 0x0 (1 bytes)
  //                  src_ip: union ipv6_addr {
  //                    remote: ipv6_addr_t[const[0xbb, int8]] {
  //                      a0: const = 0xfe (1 bytes)
  //                      a1: const = 0x80 (1 bytes)
  //                      a2: buffer: {00 00 00 00 00 00 00 00 00 00 00 00 00}
  //                      (length 0xd) a3: const = 0xbb (1 bytes)
  //                    }
  //                  }
  //                  dst_ip: union ipv6_addr {
  //                    local: ipv6_addr_t[const[0xaa, int8]] {
  //                      a0: const = 0xfe (1 bytes)
  //                      a1: const = 0x80 (1 bytes)
  //                      a2: buffer: {00 00 00 00 00 00 00 00 00 00 00 00 00}
  //                      (length 0xd) a3: const = 0xaa (1 bytes)
  //                    }
  //                  }
  //                  payload: ipv6_packet_payload[tcp_packet] {
  //                    ext_headers: array[ipv6_ext_header] {
  //                    }
  //                    payload: tcp_packet {
  //                      header: tcp_header {
  //                        src_port: int16be = 0x2b00 (2 bytes)
  //                        dst_port: int16be = 0xfffc (2 bytes)
  //                        seq_num: tcp_seq_num (resource)
  //                        ack_num: tcp_seq_num (resource)
  //                        ns: int8 = 0x0 (0 bytes)
  //                        reserved: const = 0x0 (0 bytes)
  //                        data_off: bytesize4 = 0x5 (1 bytes)
  //                        flags: tcp_flags = 0x0 (1 bytes)
  //                        window_size: int16be = 0x0 (2 bytes)
  //                        csum: csum = 0x0 (2 bytes)
  //                        urg_ptr: int16be = 0x0 (2 bytes)
  //                        options: tcp_options {
  //                          options: array[tcp_option] {
  //                          }
  //                        }
  //                      }
  //                      payload: tcp_payload {
  //                        payload: buffer: {} (length 0x0)
  //                      }
  //                    }
  //                  }
  //                }
  //              }
  //            }
  //          }
  //        }
  //      }
  //    }
  //    frags: nil
  //  ]
  memset((void*)0x200001c0, 170, 5);
  *(uint8_t*)0x200001c5 = 0xaa;
  memset((void*)0x200001c6, 170, 5);
  *(uint8_t*)0x200001cb = 0xaa;
  *(uint16_t*)0x200001cc = htobe16(0x86dd);
  STORE_BY_BITMASK(uint8_t, , 0x200001ce, 0, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200001ce, 6, 4, 4);
  memcpy((void*)0x200001cf, "\xe0\xff\xac", 3);
  *(uint16_t*)0x200001d2 = htobe16(0x14);
  *(uint8_t*)0x200001d4 = 0x2c;
  *(uint8_t*)0x200001d5 = 0;
  *(uint8_t*)0x200001d6 = 0xfe;
  *(uint8_t*)0x200001d7 = 0x80;
  memset((void*)0x200001d8, 0, 13);
  *(uint8_t*)0x200001e5 = 0xbb;
  *(uint8_t*)0x200001e6 = 0xfe;
  *(uint8_t*)0x200001e7 = 0x80;
  memset((void*)0x200001e8, 0, 13);
  *(uint8_t*)0x200001f5 = 0xaa;
  *(uint16_t*)0x200001f6 = htobe16(0x2b00);
  *(uint16_t*)0x200001f8 = htobe16(0xfffc);
  *(uint32_t*)0x200001fa = 0x41424344;
  *(uint32_t*)0x200001fe = 0x41424344;
  STORE_BY_BITMASK(uint8_t, , 0x20000202, 0, 0, 1);
  STORE_BY_BITMASK(uint8_t, , 0x20000202, 0, 1, 3);
  STORE_BY_BITMASK(uint8_t, , 0x20000202, 5, 4, 4);
  *(uint8_t*)0x20000203 = 0;
  *(uint16_t*)0x20000204 = htobe16(0);
  *(uint16_t*)0x20000206 = htobe16(0);
  *(uint16_t*)0x20000208 = htobe16(0);
  struct csum_inet csum_1;
  csum_inet_init(&csum_1);
  csum_inet_update(&csum_1, (const uint8_t*)0x200001d6, 16);
  csum_inet_update(&csum_1, (const uint8_t*)0x200001e6, 16);
  uint32_t csum_1_chunk_2 = 0x14000000;
  csum_inet_update(&csum_1, (const uint8_t*)&csum_1_chunk_2, 4);
  uint32_t csum_1_chunk_3 = 0x6000000;
  csum_inet_update(&csum_1, (const uint8_t*)&csum_1_chunk_3, 4);
  csum_inet_update(&csum_1, (const uint8_t*)0x200001f6, 20);
  *(uint16_t*)0x20000206 = csum_inet_digest(&csum_1);
  syz_emit_ethernet(/*len=*/0x4a, /*packet=*/0x200001c0, /*frags=*/0);
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0x1000000,
          /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x21000000ul, /*len=*/0x1000, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  const char* reason;
  (void)reason;
  do_sandbox_none();
  return 0;
}