// https://syzkaller.appspot.com/bug?id=9ff117082222e5ec493fca16a22c0f0611b715cf
// autogenerated by syzkaller (http://github.com/google/syzkaller)

#define _GNU_SOURCE
#include <arpa/inet.h>
#include <endian.h>
#include <errno.h>
#include <errno.h>
#include <fcntl.h>
#include <fcntl.h>
#include <linux/capability.h>
#include <linux/if.h>
#include <linux/if_ether.h>
#include <linux/if_tun.h>
#include <linux/ip.h>
#include <linux/tcp.h>
#include <net/if_arp.h>
#include <sched.h>
#include <signal.h>
#include <stdarg.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/mount.h>
#include <sys/prctl.h>
#include <sys/resource.h>
#include <sys/stat.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/time.h>
#include <sys/uio.h>
#include <sys/wait.h>
#include <unistd.h>

__attribute__((noreturn)) static void doexit(int status)
{
  volatile unsigned i;
  syscall(__NR_exit_group, status);
  for (i = 0;; i++) {
  }
}
#include <errno.h>
#include <setjmp.h>
#include <signal.h>
#include <stdarg.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <string.h>
#include <sys/stat.h>

const int kFailStatus = 67;
const int kRetryStatus = 69;

static void fail(const char* msg, ...)
{
  int e = errno;
  va_list args;
  va_start(args, msg);
  vfprintf(stderr, msg, args);
  va_end(args);
  fprintf(stderr, " (errno %d)\n", e);
  doexit((e == ENOMEM || e == EAGAIN) ? kRetryStatus : kFailStatus);
}

#define BITMASK_LEN(type, bf_len) (type)((1ull << (bf_len)) - 1)

#define BITMASK_LEN_OFF(type, bf_off, bf_len)                                  \
  (type)(BITMASK_LEN(type, (bf_len)) << (bf_off))

#define STORE_BY_BITMASK(type, addr, val, bf_off, bf_len)                      \
  if ((bf_off) == 0 && (bf_len) == 0) {                                        \
    *(type*)(addr) = (type)(val);                                              \
  } else {                                                                     \
    type new_val = *(type*)(addr);                                             \
    new_val &= ~BITMASK_LEN_OFF(type, (bf_off), (bf_len));                     \
    new_val |= ((type)(val)&BITMASK_LEN(type, (bf_len))) << (bf_off);          \
    *(type*)(addr) = new_val;                                                  \
  }

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;
  for (i = 0; i < length - 1; i += 2)
    csum->acc += *(uint16_t*)&data[i];

  if (length & 1)
    csum->acc += (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 __thread int skip_segv;
static __thread jmp_buf segv_env;

static void segv_handler(int sig, siginfo_t* info, void* uctx)
{
  uintptr_t addr = (uintptr_t)info->si_addr;
  const uintptr_t prog_start = 1 << 20;
  const uintptr_t prog_end = 100 << 20;
  if (__atomic_load_n(&skip_segv, __ATOMIC_RELAXED) &&
      (addr < prog_start || addr > prog_end)) {
    _longjmp(segv_env, 1);
  }
  doexit(sig);
}

static void install_segv_handler()
{
  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(...)                                                        \
  {                                                                            \
    __atomic_fetch_add(&skip_segv, 1, __ATOMIC_SEQ_CST);                       \
    if (_setjmp(segv_env) == 0) {                                              \
      __VA_ARGS__;                                                             \
    }                                                                          \
    __atomic_fetch_sub(&skip_segv, 1, __ATOMIC_SEQ_CST);                       \
  }

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

static void vsnprintf_check(char* str, size_t size, const char* format,
                            va_list args)
{
  int rv;

  rv = vsnprintf(str, size, format, args);
  if (rv < 0)
    fail("tun: snprintf failed");
  if ((size_t)rv >= size)
    fail("tun: string '%s...' doesn't fit into buffer", str);
}

static void snprintf_check(char* str, size_t size, const char* format, ...)
{
  va_list args;

  va_start(args, format);
  vsnprintf_check(str, size, format, args);
  va_end(args);
}

#define COMMAND_MAX_LEN 128
#define PATH_PREFIX                                                            \
  "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin "
#define PATH_PREFIX_LEN (sizeof(PATH_PREFIX) - 1)

static void execute_command(bool panic, const char* format, ...)
{
  va_list args;
  char command[PATH_PREFIX_LEN + COMMAND_MAX_LEN];
  int rv;

  va_start(args, format);
  memcpy(command, PATH_PREFIX, PATH_PREFIX_LEN);
  vsnprintf_check(command + PATH_PREFIX_LEN, COMMAND_MAX_LEN, format, args);
  rv = system(command);
  if (panic && rv != 0)
    fail("tun: command \"%s\" failed with code %d", &command[0], rv);

  va_end(args);
}

static int tunfd = -1;
static int tun_frags_enabled;

#define SYZ_TUN_MAX_PACKET_SIZE 1000

#define TUN_IFACE "syz_tun"

#define LOCAL_MAC "aa:aa:aa:aa:aa:aa"
#define REMOTE_MAC "aa:aa:aa:aa:aa:bb"

#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
#define IFF_NAPI_FRAGS 0x0020

static void initialize_tun(void)
{
  tunfd = open("/dev/net/tun", O_RDWR | O_NONBLOCK);
  if (tunfd == -1) {
    printf("tun: can't open /dev/net/tun: please enable CONFIG_TUN=y\n");
    printf("otherwise fuzzing or reproducing might not work as intended\n");
    return;
  }
  const int kTunFd = 252;
  if (dup2(tunfd, kTunFd) < 0)
    fail("dup2(tunfd, kTunFd) failed");
  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 | IFF_NAPI | IFF_NAPI_FRAGS;
  if (ioctl(tunfd, TUNSETIFF, (void*)&ifr) < 0) {
    ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
    if (ioctl(tunfd, TUNSETIFF, (void*)&ifr) < 0)
      fail("tun: ioctl(TUNSETIFF) failed");
  }
  if (ioctl(tunfd, TUNGETIFF, (void*)&ifr) < 0)
    fail("tun: ioctl(TUNGETIFF) failed");
  tun_frags_enabled = (ifr.ifr_flags & IFF_NAPI_FRAGS) != 0;

  execute_command(1, "sysctl -w net.ipv6.conf.%s.accept_dad=0", TUN_IFACE);

  execute_command(1, "sysctl -w net.ipv6.conf.%s.router_solicitations=0",
                  TUN_IFACE);

  execute_command(1, "ip link set dev %s address %s", TUN_IFACE, LOCAL_MAC);
  execute_command(1, "ip addr add %s/24 dev %s", LOCAL_IPV4, TUN_IFACE);
  execute_command(1, "ip -6 addr add %s/120 dev %s", LOCAL_IPV6, TUN_IFACE);
  execute_command(1, "ip neigh add %s lladdr %s dev %s nud permanent",
                  REMOTE_IPV4, REMOTE_MAC, TUN_IFACE);
  execute_command(1, "ip -6 neigh add %s lladdr %s dev %s nud permanent",
                  REMOTE_IPV6, REMOTE_MAC, TUN_IFACE);
  execute_command(1, "ip link set dev %s up", TUN_IFACE);
}

#define DEV_IPV4 "172.20.20.%d"
#define DEV_IPV6 "fe80::%02hx"
#define DEV_MAC "aa:aa:aa:aa:aa:%02hx"

static void initialize_netdevices(void)
{
  unsigned i;
  const char* devtypes[] = {"ip6gretap", "bridge", "vcan", "bond", "veth"};
  const char* devnames[] = {"lo",       "sit0",    "bridge0", "vcan0",
                            "tunl0",    "gre0",    "gretap0", "ip_vti0",
                            "ip6_vti0", "ip6tnl0", "ip6gre0", "ip6gretap0",
                            "erspan0",  "bond0",   "veth0",   "veth1"};

  for (i = 0; i < sizeof(devtypes) / (sizeof(devtypes[0])); i++)
    execute_command(0, "ip link add dev %s0 type %s", devtypes[i], devtypes[i]);
  execute_command(0, "ip link add dev veth1 type veth");
  for (i = 0; i < sizeof(devnames) / (sizeof(devnames[0])); i++) {
    char addr[32];
    snprintf_check(addr, sizeof(addr), DEV_IPV4, i + 10);
    execute_command(0, "ip -4 addr add %s/24 dev %s", addr, devnames[i]);
    snprintf_check(addr, sizeof(addr), DEV_IPV6, i + 10);
    execute_command(0, "ip -6 addr add %s/120 dev %s", addr, devnames[i]);
    snprintf_check(addr, sizeof(addr), DEV_MAC, i + 10);
    execute_command(0, "ip link set dev %s address %s", devnames[i], addr);
    execute_command(0, "ip link set dev %s up", devnames[i]);
  }
}

#define MAX_FRAGS 4
struct vnet_fragmentation {
  uint32_t full;
  uint32_t count;
  uint32_t frags[MAX_FRAGS];
};

static uintptr_t syz_emit_ethernet(uintptr_t a0, uintptr_t a1, uintptr_t a2)
{
  if (tunfd < 0)
    return (uintptr_t)-1;

  uint32_t length = a0;
  char* data = (char*)a1;

  struct vnet_fragmentation* frags = (struct vnet_fragmentation*)a2;
  struct iovec vecs[MAX_FRAGS + 1];
  uint32_t nfrags = 0;
  if (!tun_frags_enabled || frags == NULL) {
    vecs[nfrags].iov_base = data;
    vecs[nfrags].iov_len = length;
    nfrags++;
  } else {
    bool full = true;
    uint32_t i, count = 0;
    NONFAILING(full = frags->full);
    NONFAILING(count = frags->count);
    if (count > MAX_FRAGS)
      count = MAX_FRAGS;
    for (i = 0; i < count && length != 0; i++) {
      uint32_t size = 0;
      NONFAILING(size = frags->frags[i]);
      if (size > length)
        size = length;
      vecs[nfrags].iov_base = data;
      vecs[nfrags].iov_len = size;
      nfrags++;
      data += size;
      length -= size;
    }
    if (length != 0 && (full || nfrags == 0)) {
      vecs[nfrags].iov_base = data;
      vecs[nfrags].iov_len = length;
      nfrags++;
    }
  }
  return writev(tunfd, vecs, nfrags);
}

static void loop();

static void sandbox_common()
{
  prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
  setpgrp();
  setsid();

  struct rlimit rlim;
  rlim.rlim_cur = rlim.rlim_max = 128 << 20;
  setrlimit(RLIMIT_AS, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 8 << 20;
  setrlimit(RLIMIT_MEMLOCK, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 1 << 20;
  setrlimit(RLIMIT_FSIZE, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 1 << 20;
  setrlimit(RLIMIT_STACK, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 0;
  setrlimit(RLIMIT_CORE, &rlim);

#define CLONE_NEWCGROUP 0x02000000

  if (unshare(CLONE_NEWNS)) {
  }
  if (unshare(CLONE_NEWIPC)) {
  }
  if (unshare(CLONE_NEWCGROUP)) {
  }
  if (unshare(CLONE_NEWUTS)) {
  }
  if (unshare(CLONE_SYSVSEM)) {
  }
}

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) {
    close(fd);
    return false;
  }
  close(fd);
  return true;
}

static int real_uid;
static int real_gid;
__attribute__((aligned(64 << 10))) static char sandbox_stack[1 << 20];

static int namespace_sandbox_proc(void* arg)
{
  sandbox_common();

  write_file("/proc/self/setgroups", "deny");
  if (!write_file("/proc/self/uid_map", "0 %d 1\n", real_uid))
    fail("write of /proc/self/uid_map failed");
  if (!write_file("/proc/self/gid_map", "0 %d 1\n", real_gid))
    fail("write of /proc/self/gid_map failed");

  if (unshare(CLONE_NEWNET))
    fail("unshare(CLONE_NEWNET)");
  initialize_tun();
  initialize_netdevices();

  if (mkdir("./syz-tmp", 0777))
    fail("mkdir(syz-tmp) failed");
  if (mount("", "./syz-tmp", "tmpfs", 0, NULL))
    fail("mount(tmpfs) failed");
  if (mkdir("./syz-tmp/newroot", 0777))
    fail("mkdir failed");
  if (mkdir("./syz-tmp/newroot/dev", 0700))
    fail("mkdir failed");
  unsigned mount_flags = MS_BIND | MS_REC | MS_PRIVATE;
  if (mount("/dev", "./syz-tmp/newroot/dev", NULL, mount_flags, NULL))
    fail("mount(dev) failed");
  if (mkdir("./syz-tmp/newroot/proc", 0700))
    fail("mkdir failed");
  if (mount(NULL, "./syz-tmp/newroot/proc", "proc", 0, NULL))
    fail("mount(proc) failed");
  if (mkdir("./syz-tmp/newroot/selinux", 0700))
    fail("mkdir failed");
  const char* selinux_path = "./syz-tmp/newroot/selinux";
  if (mount("/selinux", selinux_path, NULL, mount_flags, NULL)) {
    if (errno != ENOENT)
      fail("mount(/selinux) failed");
    if (mount("/sys/fs/selinux", selinux_path, NULL, mount_flags, NULL) &&
        errno != ENOENT)
      fail("mount(/sys/fs/selinux) failed");
  }
  if (mkdir("./syz-tmp/pivot", 0777))
    fail("mkdir failed");
  if (syscall(SYS_pivot_root, "./syz-tmp", "./syz-tmp/pivot")) {
    if (chdir("./syz-tmp"))
      fail("chdir failed");
  } else {
    if (chdir("/"))
      fail("chdir failed");
    if (umount2("./pivot", MNT_DETACH))
      fail("umount failed");
  }
  if (chroot("./newroot"))
    fail("chroot failed");
  if (chdir("/"))
    fail("chdir failed");

  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))
    fail("capget failed");
  cap_data[0].effective &= ~(1 << CAP_SYS_PTRACE);
  cap_data[0].permitted &= ~(1 << CAP_SYS_PTRACE);
  cap_data[0].inheritable &= ~(1 << CAP_SYS_PTRACE);
  if (syscall(SYS_capset, &cap_hdr, &cap_data))
    fail("capset failed");

  loop();
  doexit(1);
}

static int do_sandbox_namespace(void)
{
  int pid;

  real_uid = getuid();
  real_gid = getgid();
  mprotect(sandbox_stack, 4096, PROT_NONE);
  pid =
      clone(namespace_sandbox_proc, &sandbox_stack[sizeof(sandbox_stack) - 64],
            CLONE_NEWUSER | CLONE_NEWPID, 0);
  if (pid < 0)
    fail("sandbox clone failed");
  return pid;
}

uint64_t r[2] = {0xffffffffffffffff, 0xffffffffffffffff};
void loop()
{
  long res;
  res = syscall(__NR_socket, 0xa, 2, 0);
  if (res != -1)
    r[0] = res;
  res = syscall(__NR_socket, 0x18, 1, 1);
  if (res != -1)
    r[1] = res;
  NONFAILING(*(uint16_t*)0x205fafd2 = 0x18);
  NONFAILING(*(uint32_t*)0x205fafd4 = 1);
  NONFAILING(*(uint32_t*)0x205fafd8 = 0);
  NONFAILING(*(uint32_t*)0x205fafdc = r[0]);
  NONFAILING(*(uint16_t*)0x205fafe0 = 2);
  NONFAILING(*(uint16_t*)0x205fafe2 = htobe16(0x4e21));
  NONFAILING(*(uint8_t*)0x205fafe4 = 0xac);
  NONFAILING(*(uint8_t*)0x205fafe5 = 0x14);
  NONFAILING(*(uint8_t*)0x205fafe6 = 0);
  NONFAILING(*(uint8_t*)0x205fafe7 = 0xbb);
  NONFAILING(*(uint8_t*)0x205fafe8 = 0);
  NONFAILING(*(uint8_t*)0x205fafe9 = 0);
  NONFAILING(*(uint8_t*)0x205fafea = 0);
  NONFAILING(*(uint8_t*)0x205fafeb = 0);
  NONFAILING(*(uint8_t*)0x205fafec = 0);
  NONFAILING(*(uint8_t*)0x205fafed = 0);
  NONFAILING(*(uint8_t*)0x205fafee = 0);
  NONFAILING(*(uint8_t*)0x205fafef = 0);
  NONFAILING(*(uint32_t*)0x205faff0 = 4);
  NONFAILING(*(uint32_t*)0x205faff4 = 0);
  NONFAILING(*(uint32_t*)0x205faff8 = 2);
  NONFAILING(*(uint32_t*)0x205faffc = 0);
  syscall(__NR_connect, r[1], 0x205fafd2, 0x2e);
  NONFAILING(*(uint16_t*)0x200000c0 = 0xa);
  NONFAILING(*(uint16_t*)0x200000c2 = htobe16(0x4e21));
  NONFAILING(*(uint32_t*)0x200000c4 = 0x7fff);
  NONFAILING(*(uint8_t*)0x200000c8 = 0);
  NONFAILING(*(uint8_t*)0x200000c9 = 0);
  NONFAILING(*(uint8_t*)0x200000ca = 0);
  NONFAILING(*(uint8_t*)0x200000cb = 0);
  NONFAILING(*(uint8_t*)0x200000cc = 0);
  NONFAILING(*(uint8_t*)0x200000cd = 0);
  NONFAILING(*(uint8_t*)0x200000ce = 0);
  NONFAILING(*(uint8_t*)0x200000cf = 0);
  NONFAILING(*(uint8_t*)0x200000d0 = 0);
  NONFAILING(*(uint8_t*)0x200000d1 = 0);
  NONFAILING(*(uint8_t*)0x200000d2 = -1);
  NONFAILING(*(uint8_t*)0x200000d3 = -1);
  NONFAILING(*(uint32_t*)0x200000d4 = htobe32(0));
  NONFAILING(*(uint32_t*)0x200000d8 = 3);
  syscall(__NR_connect, r[0], 0x200000c0, 0x1c);
  syscall(__NR_sendto, r[1], 0x20de7000, 0, 0xc3fe68eda9554f8b, 0x20000000, 0);
  NONFAILING(*(uint8_t*)0x20000100 = 0xaa);
  NONFAILING(*(uint8_t*)0x20000101 = 0xaa);
  NONFAILING(*(uint8_t*)0x20000102 = 0xaa);
  NONFAILING(*(uint8_t*)0x20000103 = 0xaa);
  NONFAILING(*(uint8_t*)0x20000104 = 0xaa);
  NONFAILING(*(uint8_t*)0x20000105 = 0xaa);
  NONFAILING(*(uint8_t*)0x20000106 = -1);
  NONFAILING(*(uint8_t*)0x20000107 = -1);
  NONFAILING(*(uint8_t*)0x20000108 = -1);
  NONFAILING(*(uint8_t*)0x20000109 = -1);
  NONFAILING(*(uint8_t*)0x2000010a = -1);
  NONFAILING(*(uint8_t*)0x2000010b = -1);
  NONFAILING(*(uint16_t*)0x2000010c = htobe16(0x86dd));
  NONFAILING(STORE_BY_BITMASK(uint8_t, 0x2000010e, 0, 0, 4));
  NONFAILING(STORE_BY_BITMASK(uint8_t, 0x2000010e, 6, 4, 4));
  NONFAILING(memcpy((void*)0x2000010f, "\xd8\x65\x2b", 3));
  NONFAILING(*(uint16_t*)0x20000112 = htobe16(0x14));
  NONFAILING(*(uint8_t*)0x20000114 = 6);
  NONFAILING(*(uint8_t*)0x20000115 = 0);
  NONFAILING(*(uint8_t*)0x20000116 = 0xfe);
  NONFAILING(*(uint8_t*)0x20000117 = 0x7e);
  NONFAILING(*(uint8_t*)0x20000118 = 0);
  NONFAILING(*(uint8_t*)0x20000119 = 0);
  NONFAILING(*(uint8_t*)0x2000011a = 0);
  NONFAILING(*(uint8_t*)0x2000011b = 0);
  NONFAILING(*(uint8_t*)0x2000011c = 0);
  NONFAILING(*(uint8_t*)0x2000011d = 0);
  NONFAILING(*(uint8_t*)0x2000011e = 0);
  NONFAILING(*(uint8_t*)0x2000011f = 0);
  NONFAILING(*(uint8_t*)0x20000120 = 0);
  NONFAILING(*(uint8_t*)0x20000121 = 0);
  NONFAILING(*(uint8_t*)0x20000122 = 0);
  NONFAILING(*(uint8_t*)0x20000123 = 0);
  NONFAILING(*(uint8_t*)0x20000124 = 0);
  NONFAILING(*(uint8_t*)0x20000125 = 0xaa);
  NONFAILING(*(uint8_t*)0x20000126 = 0xfe);
  NONFAILING(*(uint8_t*)0x20000127 = 0x80);
  NONFAILING(*(uint8_t*)0x20000128 = 0);
  NONFAILING(*(uint8_t*)0x20000129 = 0);
  NONFAILING(*(uint8_t*)0x2000012a = 0);
  NONFAILING(*(uint8_t*)0x2000012b = 0);
  NONFAILING(*(uint8_t*)0x2000012c = 0);
  NONFAILING(*(uint8_t*)0x2000012d = 0);
  NONFAILING(*(uint8_t*)0x2000012e = 0);
  NONFAILING(*(uint8_t*)0x2000012f = 0);
  NONFAILING(*(uint8_t*)0x20000130 = 0);
  NONFAILING(*(uint8_t*)0x20000131 = 0);
  NONFAILING(*(uint8_t*)0x20000132 = 0);
  NONFAILING(*(uint8_t*)0x20000133 = 0);
  NONFAILING(*(uint8_t*)0x20000134 = 0);
  NONFAILING(*(uint8_t*)0x20000135 = 0xaa);
  NONFAILING(*(uint16_t*)0x20000136 = htobe16(0x4e20));
  NONFAILING(*(uint16_t*)0x20000138 = htobe16(0x4e20));
  NONFAILING(*(uint32_t*)0x2000013a = 0x41424344);
  NONFAILING(*(uint32_t*)0x2000013e = 0x41424344);
  NONFAILING(STORE_BY_BITMASK(uint8_t, 0x20000142, 0, 0, 1));
  NONFAILING(STORE_BY_BITMASK(uint8_t, 0x20000142, 0, 1, 3));
  NONFAILING(STORE_BY_BITMASK(uint8_t, 0x20000142, 5, 4, 4));
  NONFAILING(*(uint8_t*)0x20000143 = 0);
  NONFAILING(*(uint16_t*)0x20000144 = htobe16(0));
  NONFAILING(*(uint16_t*)0x20000146 = 0);
  NONFAILING(*(uint16_t*)0x20000148 = htobe16(0));
  NONFAILING(*(uint32_t*)0x200002c0 = 0);
  NONFAILING(*(uint32_t*)0x200002c4 = 0);
  NONFAILING(*(uint32_t*)0x200002c8 = 0);
  NONFAILING(*(uint32_t*)0x200002cc = 0);
  NONFAILING(*(uint32_t*)0x200002d0 = 0);
  NONFAILING(*(uint32_t*)0x200002d4 = 0);
  struct csum_inet csum_1;
  csum_inet_init(&csum_1);
  NONFAILING(csum_inet_update(&csum_1, (const uint8_t*)0x20000116, 16));
  NONFAILING(csum_inet_update(&csum_1, (const uint8_t*)0x20000126, 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);
  NONFAILING(csum_inet_update(&csum_1, (const uint8_t*)0x20000136, 20));
  NONFAILING(*(uint16_t*)0x20000146 = csum_inet_digest(&csum_1));
  syz_emit_ethernet(0x4a, 0x20000100, 0x200002c0);
}

int main()
{
  syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0);
  install_segv_handler();
  use_temporary_dir();
  int pid = do_sandbox_namespace();
  int status = 0;
  while (waitpid(pid, &status, __WALL) != pid) {
  }
  return 0;
}