// https://syzkaller.appspot.com/bug?id=b3c20faa82ee1bbcec5c7eddb44e2c23b20b891a
// 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 <signal.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/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/neighbour.h>
#include <linux/net.h>
#include <linux/netlink.h>
#include <linux/rtnetlink.h>
#include <linux/veth.h>

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);
}

#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))))

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;

#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 int inject_fault(int nth)
{
  int fd;
  fd = open("/proc/thread-self/fail-nth", O_RDWR);
  if (fd == -1)
    exit(1);
  char buf[16];
  sprintf(buf, "%d", nth);
  if (write(fd, buf, strlen(buf)) != (ssize_t)strlen(buf))
    exit(1);
  return fd;
}

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 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 const char* setup_fault()
{
  int fd = open("/proc/self/make-it-fail", O_WRONLY);
  if (fd == -1)
    return "CONFIG_FAULT_INJECTION is not enabled";
  close(fd);
  fd = open("/proc/thread-self/fail-nth", O_WRONLY);
  if (fd == -1)
    return "kernel does not have systematic fault injection support";
  close(fd);
  static struct {
    const char* file;
    const char* val;
    bool fatal;
  } files[] = {
      {"/sys/kernel/debug/failslab/ignore-gfp-wait", "N", true},
      {"/sys/kernel/debug/fail_futex/ignore-private", "N", false},
      {"/sys/kernel/debug/fail_page_alloc/ignore-gfp-highmem", "N", false},
      {"/sys/kernel/debug/fail_page_alloc/ignore-gfp-wait", "N", false},
      {"/sys/kernel/debug/fail_page_alloc/min-order", "0", false},
  };
  unsigned i;
  for (i = 0; i < sizeof(files) / sizeof(files[0]); i++) {
    if (!write_file(files[i].file, files[i].val)) {
      if (files[i].fatal)
        return "failed to write fault injection file";
    }
  }
  return NULL;
}

#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);
    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[4] = {0xffffffffffffffff, 0xffffffffffffffff, 0x0,
                 0xffffffffffffffff};

void execute_one(void)
{
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  openat$tun arguments: [
  //    fd: const = 0xffffffffffffff9c (8 bytes)
  //    file: ptr[in, buffer] {
  //      buffer: {2f 64 65 76 2f 6e 65 74 2f 74 75 6e 00} (length 0xd)
  //    }
  //    flags: open_flags = 0x2 (4 bytes)
  //    mode: const = 0x0 (2 bytes)
  //  ]
  //  returns fd_tun
  memcpy((void*)0x200000000000, "/dev/net/tun\000", 13);
  res = syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul,
                /*file=*/0x200000000000ul, /*flags=O_RDWR*/ 2, /*mode=*/0);
  if (res != -1)
    r[0] = res;
  //  ioctl$TUNSETIFF arguments: [
  //    fd: fd_tun (resource)
  //    cmd: const = 0x400454ca (4 bytes)
  //    arg: ptr[in, ifreq_dev_t[devnames, flags[tun_setiff_flags, int16]]] {
  //      ifreq_dev_t[devnames, flags[tun_setiff_flags, int16]] {
  //        ifr_ifrn: buffer: {73 79 7a 6b 61 6c 6c 65 72 30 00 00 00 00 00 00}
  //        (length 0x10) elem: tun_setiff_flags = 0x1001 (2 bytes) pad = 0x0
  //        (22 bytes)
  //      }
  //    }
  //  ]
  memcpy((void*)0x200000000040, "syzkaller0\000\000\000\000\000\000", 16);
  *(uint16_t*)0x200000000050 = 0x1001;
  syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0x400454ca,
          /*arg=*/0x200000000040ul);
  //  socket$nl_route arguments: [
  //    domain: const = 0x10 (8 bytes)
  //    type: const = 0x3 (8 bytes)
  //    proto: const = 0x0 (4 bytes)
  //  ]
  //  returns sock_nl_route
  res = syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/0);
  if (res != -1)
    r[1] = res;
  //  ioctl$sock_SIOCGIFINDEX arguments: [
  //    fd: sock (resource)
  //    cmd: const = 0x8933 (4 bytes)
  //    arg: ptr[out, ifreq_dev_t[devnames, ifindex]] {
  //      ifreq_dev_t[devnames, ifindex] {
  //        ifr_ifrn: buffer: {73 79 7a 6b 61 6c 6c 65 72 30 00 00 00 00 00 00}
  //        (length 0x10) elem: ifindex (resource) pad = 0x0 (20 bytes)
  //      }
  //    }
  //  ]
  memcpy((void*)0x200000000080, "syzkaller0\000\000\000\000\000\000", 16);
  res = syscall(__NR_ioctl, /*fd=*/r[1], /*cmd=*/0x8933,
                /*arg=*/0x200000000080ul);
  if (res != -1)
    r[2] = *(uint32_t*)0x200000000090;
  //  socket$inet arguments: [
  //    domain: const = 0x2 (8 bytes)
  //    type: socket_type = 0x2 (8 bytes)
  //    proto: int32 = 0x0 (4 bytes)
  //  ]
  //  returns sock_in
  res = syscall(__NR_socket, /*domain=*/2ul, /*type=SOCK_DGRAM*/ 2ul,
                /*proto=*/0);
  if (res != -1)
    r[3] = res;
  //  ioctl$sock_inet_SIOCSIFFLAGS arguments: [
  //    fd: sock (resource)
  //    cmd: const = 0x8914 (4 bytes)
  //    arg: ptr[in, ifreq_dev_t[devnames, flags[ifru_flags, int16]]] {
  //      ifreq_dev_t[devnames, flags[ifru_flags, int16]] {
  //        ifr_ifrn: buffer: {73 79 7a 6b 61 6c 6c 65 72 30 00 00 00 00 00 00}
  //        (length 0x10) elem: ifru_flags = 0x1 (2 bytes) pad = 0x0 (22 bytes)
  //      }
  //    }
  //  ]
  memcpy((void*)0x2000000000c0, "syzkaller0\000\000\000\000\000\000", 16);
  *(uint16_t*)0x2000000000d0 = 1;
  syscall(__NR_ioctl, /*fd=*/r[3], /*cmd=*/0x8914, /*arg=*/0x2000000000c0ul);
  //  sendmsg$nl_route_sched arguments: [
  //    fd: sock_nl_route (resource)
  //    msg: ptr[in, msghdr_netlink[netlink_msg_route_sched]] {
  //      msghdr_netlink[netlink_msg_route_sched] {
  //        addr: nil
  //        addrlen: len = 0x0 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //        vec: ptr[in, iovec[in, netlink_msg_route_sched]] {
  //          iovec[in, netlink_msg_route_sched] {
  //            addr: ptr[in, netlink_msg_route_sched] {
  //              union netlink_msg_route_sched {
  //                newqdisc: netlink_msg_t[const[RTM_NEWQDISC, int16],
  //                tcmsg[AF_UNSPEC], rtm_tca_policy] {
  //                  len: len = 0x30 (4 bytes)
  //                  type: const = 0x24 (2 bytes)
  //                  flags: netlink_msg_flags = 0x401 (2 bytes)
  //                  seq: int32 = 0x0 (4 bytes)
  //                  pid: int32 = 0x0 (4 bytes)
  //                  payload: tcmsg[AF_UNSPEC] {
  //                    family: const = 0x0 (1 bytes)
  //                    tcm__pad1: const = 0x0 (1 bytes)
  //                    tcm__pad2: const = 0x0 (2 bytes)
  //                    ifindex: ifindex (resource)
  //                    tcm_handle: tcm_handle {
  //                      minor: tcm_handle_offsets = 0x0 (2 bytes)
  //                      major: tcm_handle_offsets = 0xffff (2 bytes)
  //                    }
  //                    tcm_parent: tcm_handle {
  //                      minor: tcm_handle_offsets = 0xfff1 (2 bytes)
  //                      major: tcm_handle_offsets = 0xffff (2 bytes)
  //                    }
  //                    tcm_info: tcm_handle {
  //                      minor: tcm_handle_offsets = 0x0 (2 bytes)
  //                      major: tcm_handle_offsets = 0x0 (2 bytes)
  //                    }
  //                  }
  //                  attrs: array[rtm_tca_policy] {
  //                    union rtm_tca_policy {
  //                      qdisc_kind_options: union qdisc_kind_options {
  //                        q_ingress: nlattr_t[const[TCA_KIND, int16],
  //                        string["ingress"]] {
  //                          nla_len: offsetof = 0xc (2 bytes)
  //                          nla_type: const = 0x1 (2 bytes)
  //                          payload: buffer: {69 6e 67 72 65 73 73 00} (length
  //                          0x8) size: buffer: {} (length 0x0)
  //                        }
  //                      }
  //                    }
  //                  }
  //                }
  //              }
  //            }
  //            len: len = 0x30 (8 bytes)
  //          }
  //        }
  //        vlen: const = 0x1 (8 bytes)
  //        ctrl: const = 0x0 (8 bytes)
  //        ctrllen: const = 0x0 (8 bytes)
  //        f: send_flags = 0x0 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //      }
  //    }
  //    f: send_flags = 0x0 (8 bytes)
  //  ]
  *(uint64_t*)0x200000000200 = 0;
  *(uint32_t*)0x200000000208 = 0;
  *(uint64_t*)0x200000000210 = 0x200000000100;
  *(uint64_t*)0x200000000100 = 0x200000000000;
  *(uint32_t*)0x200000000000 = 0x30;
  *(uint16_t*)0x200000000004 = 0x24;
  *(uint16_t*)0x200000000006 = 0x401;
  *(uint32_t*)0x200000000008 = 0;
  *(uint32_t*)0x20000000000c = 0;
  *(uint8_t*)0x200000000010 = 0;
  *(uint8_t*)0x200000000011 = 0;
  *(uint16_t*)0x200000000012 = 0;
  *(uint32_t*)0x200000000014 = r[2];
  *(uint16_t*)0x200000000018 = 0;
  *(uint16_t*)0x20000000001a = -1;
  *(uint16_t*)0x20000000001c = 0xfff1;
  *(uint16_t*)0x20000000001e = -1;
  *(uint16_t*)0x200000000020 = 0;
  *(uint16_t*)0x200000000022 = 0;
  *(uint16_t*)0x200000000024 = 0xc;
  *(uint16_t*)0x200000000026 = 1;
  memcpy((void*)0x200000000028, "ingress\000", 8);
  *(uint64_t*)0x200000000108 = 0x30;
  *(uint64_t*)0x200000000218 = 1;
  *(uint64_t*)0x200000000220 = 0;
  *(uint64_t*)0x200000000228 = 0;
  *(uint32_t*)0x200000000230 = 0;
  syscall(__NR_sendmsg, /*fd=*/r[1], /*msg=*/0x200000000200ul, /*f=*/0ul);
  //  sendmsg$nl_route_sched arguments: [
  //    fd: sock_nl_route (resource)
  //    msg: ptr[in, msghdr_netlink[netlink_msg_route_sched]] {
  //      msghdr_netlink[netlink_msg_route_sched] {
  //        addr: nil
  //        addrlen: len = 0x0 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //        vec: ptr[in, iovec[in, netlink_msg_route_sched]] {
  //          iovec[in, netlink_msg_route_sched] {
  //            addr: ptr[in, netlink_msg_route_sched] {
  //              union netlink_msg_route_sched {
  //                newtfilter: netlink_msg_t[const[RTM_NEWTFILTER, int16],
  //                tcmsg[AF_UNSPEC], filter_policy] {
  //                  len: len = 0x84 (4 bytes)
  //                  type: const = 0x2c (2 bytes)
  //                  flags: netlink_msg_flags = 0x401 (2 bytes)
  //                  seq: int32 = 0x0 (4 bytes)
  //                  pid: int32 = 0x0 (4 bytes)
  //                  payload: tcmsg[AF_UNSPEC] {
  //                    family: const = 0x0 (1 bytes)
  //                    tcm__pad1: const = 0x0 (1 bytes)
  //                    tcm__pad2: const = 0x0 (2 bytes)
  //                    ifindex: ifindex (resource)
  //                    tcm_handle: tcm_handle {
  //                      minor: tcm_handle_offsets = 0x1 (2 bytes)
  //                      major: tcm_handle_offsets = 0x0 (2 bytes)
  //                    }
  //                    tcm_parent: tcm_handle {
  //                      minor: tcm_handle_offsets = 0xfff1 (2 bytes)
  //                      major: tcm_handle_offsets = 0xffff (2 bytes)
  //                    }
  //                    tcm_info: tcm_handle {
  //                      minor: tcm_handle_offsets = 0x8 (2 bytes)
  //                      major: tcm_handle_offsets = 0x1 (2 bytes)
  //                    }
  //                  }
  //                  attrs: array[filter_policy] {
  //                    union filter_policy {
  //                      filter_kind_options: union filter_kind_options {
  //                        f_basic: tca_kind_options_t["basic",
  //                        array[basic_policy]] {
  //                          TCA_KIND: nlattr_t[const[TCA_KIND, int16],
  //                          string["basic"]] {
  //                            nla_len: offsetof = 0xa (2 bytes)
  //                            nla_type: const = 0x1 (2 bytes)
  //                            payload: buffer: {62 61 73 69 63 00} (length
  //                            0x6) size: buffer: {} (length 0x0) pad = 0x0 (2
  //                            bytes)
  //                          }
  //                          TCA_OPTIONS: nlattr_t[const[TCA_OPTIONS, int16],
  //                          array[basic_policy]] {
  //                            nla_len: offsetof = 0x54 (2 bytes)
  //                            nla_type: const = 0x2 (2 bytes)
  //                            payload: array[basic_policy] {
  //                              union basic_policy {
  //                                TCA_BASIC_ACT: nlattr_t[const[TCA_BASIC_ACT,
  //                                int16], array[tca_actions]] {
  //                                  nla_len: offsetof = 0x50 (2 bytes)
  //                                  nla_type: const = 0x3 (2 bytes)
  //                                  payload: array[tca_actions] {
  //                                    union tca_actions {
  //                                      m_ct:
  //                                      nlattr_tt[int16:14[0:TCA_ACT_MAX_PRIO],
  //                                      0, 0, tcf_action_policy["ct",
  //                                      ct_policy]] {
  //                                        nla_len: offsetof = 0x4c (2 bytes)
  //                                        nla_type: int16 = 0x1 (1 bytes)
  //                                        NLA_F_NET_BYTEORDER: const = 0x0 (0
  //                                        bytes) NLA_F_NESTED: const = 0x0 (1
  //                                        bytes) payload:
  //                                        tcf_action_policy["ct", ct_policy] {
  //                                          TCA_ACT_KIND:
  //                                          nlattr_t[const[TCA_ACT_KIND,
  //                                          int16], string["ct"]] {
  //                                            nla_len: offsetof = 0x7 (2
  //                                            bytes) nla_type: const = 0x1 (2
  //                                            bytes) payload: buffer: {63 74
  //                                            00} (length 0x3) size: buffer:
  //                                            {} (length 0x0) pad = 0x0 (1
  //                                            bytes)
  //                                          }
  //                                          TCA_ACT_OPTIONS:
  //                                          nlattr_tt[const[TCA_ACT_OPTIONS,
  //                                          int16:14], 0, 1, array[ct_policy]]
  //                                          {
  //                                            nla_len: offsetof = 0x24 (2
  //                                            bytes) nla_type: const = 0x2 (1
  //                                            bytes) NLA_F_NET_BYTEORDER:
  //                                            const = 0x0 (0 bytes)
  //                                            NLA_F_NESTED: const = 0x1 (1
  //                                            bytes) payload: array[ct_policy]
  //                                            {
  //                                              union ct_policy {
  //                                                TCA_CT_PARMS:
  //                                                nlattr_t[const[TCA_CT_PARMS,
  //                                                int16], tc_gen] {
  //                                                  nla_len: offsetof = 0x18
  //                                                  (2 bytes) nla_type: const
  //                                                  = 0x1 (2 bytes) payload:
  //                                                  tc_gen {
  //                                                    index: int32 = 0x0 (4
  //                                                    bytes) capab: int32 =
  //                                                    0x0 (4 bytes) action:
  //                                                    tc_actions = 0x3 (4
  //                                                    bytes) refcnt: int32 =
  //                                                    0x0 (4 bytes) bindcnt:
  //                                                    int32 = 0x0 (4 bytes)
  //                                                  }
  //                                                  size: buffer: {} (length
  //                                                  0x0)
  //                                                }
  //                                              }
  //                                              union ct_policy {
  //                                                TCA_CT_ACTION:
  //                                                nlattr_t[const[TCA_CT_ACTION,
  //                                                int16],
  //                                                flags[tca_ct_actions,
  //                                                int16]] {
  //                                                  nla_len: offsetof = 0x6 (2
  //                                                  bytes) nla_type: const =
  //                                                  0x3 (2 bytes) payload:
  //                                                  tca_ct_actions = 0x1 (2
  //                                                  bytes) size: buffer: {}
  //                                                  (length 0x0) pad = 0x0 (2
  //                                                  bytes)
  //                                                }
  //                                              }
  //                                            }
  //                                            size: buffer: {} (length 0x0)
  //                                          }
  //                                          TCA_ACT_COOKIE:
  //                                          nlattr_t[const[TCA_ACT_COOKIE,
  //                                          int16], array[int8]] {
  //                                            nla_len: offsetof = 0x4 (2
  //                                            bytes) nla_type: const = 0x6 (2
  //                                            bytes) payload: buffer: {}
  //                                            (length 0x0) size: buffer: {}
  //                                            (length 0x0)
  //                                          }
  //                                          TCA_ACT_FLAGS:
  //                                          nlattr_t[const[TCA_ACT_FLAGS,
  //                                          int16],
  //                                          nla_bitfield32[tcf_action_policy_flags]]
  //                                          {
  //                                            nla_len: offsetof = 0xc (2
  //                                            bytes) nla_type: const = 0x7 (2
  //                                            bytes) payload:
  //                                            nla_bitfield32[tcf_action_policy_flags]
  //                                            {
  //                                              value: tcf_action_policy_flags
  //                                              = 0x0 (4 bytes) selector:
  //                                              tcf_action_policy_flags = 0x0
  //                                              (4 bytes)
  //                                            }
  //                                            size: buffer: {} (length 0x0)
  //                                          }
  //                                          TCA_ACT_HW_STATS:
  //                                          nlattr_t[const[TCA_ACT_HW_STATS,
  //                                          int16],
  //                                          nla_bitfield32[tcf_action_policy_hw_stats]]
  //                                          {
  //                                            nla_len: offsetof = 0xc (2
  //                                            bytes) nla_type: const = 0x8 (2
  //                                            bytes) payload:
  //                                            nla_bitfield32[tcf_action_policy_hw_stats]
  //                                            {
  //                                              value:
  //                                              tcf_action_policy_hw_stats =
  //                                              0x0 (4 bytes) selector:
  //                                              tcf_action_policy_hw_stats =
  //                                              0x0 (4 bytes)
  //                                            }
  //                                            size: buffer: {} (length 0x0)
  //                                          }
  //                                        }
  //                                        size: buffer: {} (length 0x0)
  //                                      }
  //                                    }
  //                                  }
  //                                  size: buffer: {} (length 0x0)
  //                                }
  //                              }
  //                            }
  //                            size: buffer: {} (length 0x0)
  //                          }
  //                        }
  //                      }
  //                    }
  //                  }
  //                }
  //              }
  //            }
  //            len: len = 0x84 (8 bytes)
  //          }
  //        }
  //        vlen: const = 0x1 (8 bytes)
  //        ctrl: const = 0x0 (8 bytes)
  //        ctrllen: const = 0x0 (8 bytes)
  //        f: send_flags = 0x0 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //      }
  //    }
  //    f: send_flags = 0x0 (8 bytes)
  //  ]
  *(uint64_t*)0x200000000800 = 0;
  *(uint32_t*)0x200000000808 = 0;
  *(uint64_t*)0x200000000810 = 0x200000000600;
  *(uint64_t*)0x200000000600 = 0x200000000300;
  *(uint32_t*)0x200000000300 = 0x84;
  *(uint16_t*)0x200000000304 = 0x2c;
  *(uint16_t*)0x200000000306 = 0x401;
  *(uint32_t*)0x200000000308 = 0;
  *(uint32_t*)0x20000000030c = 0;
  *(uint8_t*)0x200000000310 = 0;
  *(uint8_t*)0x200000000311 = 0;
  *(uint16_t*)0x200000000312 = 0;
  *(uint32_t*)0x200000000314 = r[2];
  *(uint16_t*)0x200000000318 = 1;
  *(uint16_t*)0x20000000031a = 0;
  *(uint16_t*)0x20000000031c = 0xfff1;
  *(uint16_t*)0x20000000031e = -1;
  *(uint16_t*)0x200000000320 = 8;
  *(uint16_t*)0x200000000322 = 1;
  *(uint16_t*)0x200000000324 = 0xa;
  *(uint16_t*)0x200000000326 = 1;
  memcpy((void*)0x200000000328, "basic\000", 6);
  *(uint16_t*)0x200000000330 = 0x54;
  *(uint16_t*)0x200000000332 = 2;
  *(uint16_t*)0x200000000334 = 0x50;
  *(uint16_t*)0x200000000336 = 3;
  *(uint16_t*)0x200000000338 = 0x4c;
  STORE_BY_BITMASK(uint16_t, , 0x20000000033a, 1, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x20000000033b, 0, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x20000000033b, 0, 7, 1);
  *(uint16_t*)0x20000000033c = 7;
  *(uint16_t*)0x20000000033e = 1;
  memcpy((void*)0x200000000340, "ct\000", 3);
  *(uint16_t*)0x200000000344 = 0x24;
  STORE_BY_BITMASK(uint16_t, , 0x200000000346, 2, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x200000000347, 0, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x200000000347, 1, 7, 1);
  *(uint16_t*)0x200000000348 = 0x18;
  *(uint16_t*)0x20000000034a = 1;
  *(uint32_t*)0x20000000034c = 0;
  *(uint32_t*)0x200000000350 = 0;
  *(uint32_t*)0x200000000354 = 3;
  *(uint32_t*)0x200000000358 = 0;
  *(uint32_t*)0x20000000035c = 0;
  *(uint16_t*)0x200000000360 = 6;
  *(uint16_t*)0x200000000362 = 3;
  *(uint16_t*)0x200000000364 = 1;
  *(uint16_t*)0x200000000368 = 4;
  *(uint16_t*)0x20000000036a = 6;
  *(uint16_t*)0x20000000036c = 0xc;
  *(uint16_t*)0x20000000036e = 7;
  *(uint32_t*)0x200000000370 = 0;
  *(uint32_t*)0x200000000374 = 0;
  *(uint16_t*)0x200000000378 = 0xc;
  *(uint16_t*)0x20000000037a = 8;
  *(uint32_t*)0x20000000037c = 0;
  *(uint32_t*)0x200000000380 = 0;
  *(uint64_t*)0x200000000608 = 0x84;
  *(uint64_t*)0x200000000818 = 1;
  *(uint64_t*)0x200000000820 = 0;
  *(uint64_t*)0x200000000828 = 0;
  *(uint32_t*)0x200000000830 = 0;
  syscall(__NR_sendmsg, /*fd=*/r[1], /*msg=*/0x200000000800ul, /*f=*/0ul);
  //  write$tun arguments: [
  //    fd: fd_tun (resource)
  //    buf: ptr[inout, array[ANYUNION]] {
  //      array[ANYUNION] {
  //        union ANYUNION {
  //          ANYBLOB: buffer: {45 00 00 1c 12 34 40 00 40 11 14 9b 0a 00 00 01
  //          0a 00 00 02 04 d2 16 2e 00 08} (length 0x1a)
  //        }
  //      }
  //    }
  //    count: len = 0x1c (8 bytes)
  //  ]
  memcpy((void*)0x200000000500,
         "\x45\x00\x00\x1c\x12\x34\x40\x00\x40\x11\x14\x9b\x0a\x00\x00\x01\x0a"
         "\x00\x00\x02\x04\xd2\x16\x2e\x00\x08",
         26);
  inject_fault(6);
  syscall(__NR_write, /*fd=*/r[0], /*buf=*/0x200000000500ul, /*count=*/0x1cul);
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffffffff000ul, /*len=*/0x1000, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x200000000000ul, /*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=*/0x200001000000ul, /*len=*/0x1000, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  const char* reason;
  (void)reason;
  if ((reason = setup_fault()))
    printf("the reproducer may not work as expected: fault injection setup "
           "failed: %s\n",
           reason);
  if ((reason = setup_802154()))
    printf("the reproducer may not work as expected: 802154 injection setup "
           "failed: %s\n",
           reason);
  use_temporary_dir();
  loop();
  return 0;
}