syzkaller-repros/linux/466bb327d275b50e6a283ef3cdfc9ae875bd837d.c

// WARNING in skb_warn_bad_offload
// https://syzkaller.appspot.com/bug?id=466bb327d275b50e6a283ef3cdfc9ae875bd837d
// status:fixed
// autogenerated by syzkaller (http://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <arpa/inet.h>
#include <errno.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 <stdarg.h>
#include <stdbool.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdio.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/mount.h>
#include <sys/prctl.h>
#include <sys/resource.h>
#include <sys/stat.h>
#include <sys/stat.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/time.h>
#include <sys/wait.h>
#include <unistd.h>

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

__attribute__((noreturn)) static void doexit(int status)
{
  volatile unsigned i;
  syscall(__NR_exit_group, status);
  for (i = 0;; i++) {
  }
}

__attribute__((noreturn)) static void fail(const char* msg, ...)
{
  int e = errno;
  fflush(stdout);
  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;                                          \
  }

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

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

  va_start(args, format);

  vsnprintf_check(command, sizeof(command), format, args);
  rv = system(command);
  if (rv != 0)
    fail("tun: command \"%s\" failed with code %d", &command[0], rv);

  va_end(args);
}

static int tunfd = -1;

#define SYZ_TUN_MAX_PACKET_SIZE 1000

#define MAX_PIDS 32
#define ADDR_MAX_LEN 32

#define LOCAL_MAC "aa:aa:aa:aa:aa:%02hx"
#define REMOTE_MAC "bb:bb:bb:bb:bb:%02hx"

#define LOCAL_IPV4 "172.20.%d.170"
#define REMOTE_IPV4 "172.20.%d.187"

#define LOCAL_IPV6 "fe80::%02hxaa"
#define REMOTE_IPV6 "fe80::%02hxbb"

static void initialize_tun(uint64_t pid)
{
  if (pid >= MAX_PIDS)
    fail("tun: no more than %d executors", MAX_PIDS);
  int id = pid;

  tunfd = open("/dev/net/tun", O_RDWR | O_NONBLOCK);
  if (tunfd == -1)
    fail("tun: can't open /dev/net/tun");

  char iface[IFNAMSIZ];
  snprintf_check(iface, sizeof(iface), "syz%d", id);

  struct ifreq ifr;
  memset(&ifr, 0, sizeof(ifr));
  strncpy(ifr.ifr_name, iface, IFNAMSIZ);
  ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
  if (ioctl(tunfd, TUNSETIFF, (void*)&ifr) < 0)
    fail("tun: ioctl(TUNSETIFF) failed");

  char local_mac[ADDR_MAX_LEN];
  snprintf_check(local_mac, sizeof(local_mac), LOCAL_MAC, id);
  char remote_mac[ADDR_MAX_LEN];
  snprintf_check(remote_mac, sizeof(remote_mac), REMOTE_MAC, id);

  char local_ipv4[ADDR_MAX_LEN];
  snprintf_check(local_ipv4, sizeof(local_ipv4), LOCAL_IPV4, id);
  char remote_ipv4[ADDR_MAX_LEN];
  snprintf_check(remote_ipv4, sizeof(remote_ipv4), REMOTE_IPV4, id);

  char local_ipv6[ADDR_MAX_LEN];
  snprintf_check(local_ipv6, sizeof(local_ipv6), LOCAL_IPV6, id);
  char remote_ipv6[ADDR_MAX_LEN];
  snprintf_check(remote_ipv6, sizeof(remote_ipv6), REMOTE_IPV6, id);

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

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

  execute_command("ip link set dev %s address %s", iface, local_mac);
  execute_command("ip addr add %s/24 dev %s", local_ipv4, iface);
  execute_command("ip -6 addr add %s/120 dev %s", local_ipv6, iface);
  execute_command("ip neigh add %s lladdr %s dev %s nud permanent",
                  remote_ipv4, remote_mac, iface);
  execute_command("ip -6 neigh add %s lladdr %s dev %s nud permanent",
                  remote_ipv6, remote_mac, iface);
  execute_command("ip link set dev %s up", iface);
}

static void setup_tun(uint64_t pid, bool enable_tun)
{
  if (enable_tun)
    initialize_tun(pid);
}

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 uintptr_t syz_emit_ethernet(uintptr_t a0, uintptr_t a1)
{

  if (tunfd < 0)
    return (uintptr_t)-1;

  int64_t length = a0;
  char* data = (char*)a1;
  return write(tunfd, data, length);
}

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);

  unshare(CLONE_NEWNS);
  unshare(CLONE_NEWIPC);
  unshare(CLONE_IO);
}

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;
static int epid;
static bool etun;
__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");

  setup_tun(epid, etun);

  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");
  if (mount("/dev", "./syz-tmp/newroot/dev", NULL,
            MS_BIND | MS_REC | MS_PRIVATE, 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/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(int executor_pid, bool enable_tun)
{
  real_uid = getuid();
  real_gid = getgid();
  epid = executor_pid;
  etun = enable_tun;
  mprotect(sandbox_stack, 4096, PROT_NONE);
  return clone(
      namespace_sandbox_proc,
      &sandbox_stack[sizeof(sandbox_stack) - 64],
      CLONE_NEWUSER | CLONE_NEWPID | CLONE_NEWUTS | CLONE_NEWNET, NULL);
}

long r[132];
void loop()
{
  memset(r, -1, sizeof(r));
  r[0] = syscall(__NR_mmap, 0x20000000ul, 0xfff000ul, 0x3ul, 0x32ul,
                 0xfffffffffffffffful, 0x0ul);
  *(uint8_t*)0x200d8000 = (uint8_t)0xbb;
  *(uint8_t*)0x200d8001 = (uint8_t)0xbb;
  *(uint8_t*)0x200d8002 = (uint8_t)0xbb;
  *(uint8_t*)0x200d8003 = (uint8_t)0xbb;
  *(uint8_t*)0x200d8004 = (uint8_t)0xbb;
  *(uint8_t*)0x200d8005 = (uint8_t)0x0;
  *(uint8_t*)0x200d8006 = (uint8_t)0xaa;
  *(uint8_t*)0x200d8007 = (uint8_t)0xaa;
  *(uint8_t*)0x200d8008 = (uint8_t)0xaa;
  *(uint8_t*)0x200d8009 = (uint8_t)0xaa;
  *(uint8_t*)0x200d800a = (uint8_t)0xaa;
  *(uint8_t*)0x200d800b = (uint8_t)0x0;
  *(uint16_t*)0x200d800c = (uint16_t)0xdd86;
  STORE_BY_BITMASK(uint8_t, 0x200d800e, 0x0, 0, 4);
  STORE_BY_BITMASK(uint8_t, 0x200d800e, 0x6, 4, 4);
  memcpy((void*)0x200d800f, "\xa2\x28\xaf", 3);
  *(uint16_t*)0x200d8012 = (uint16_t)0x2200;
  *(uint8_t*)0x200d8014 = (uint8_t)0x0;
  *(uint8_t*)0x200d8015 = (uint8_t)0x0;
  *(uint8_t*)0x200d8016 = (uint8_t)0xfe;
  *(uint8_t*)0x200d8017 = (uint8_t)0x80;
  *(uint8_t*)0x200d8018 = (uint8_t)0x0;
  *(uint8_t*)0x200d8019 = (uint8_t)0x0;
  *(uint8_t*)0x200d801a = (uint8_t)0x0;
  *(uint8_t*)0x200d801b = (uint8_t)0x0;
  *(uint8_t*)0x200d801c = (uint8_t)0x0;
  *(uint8_t*)0x200d801d = (uint8_t)0x0;
  *(uint8_t*)0x200d801e = (uint8_t)0x0;
  *(uint8_t*)0x200d801f = (uint8_t)0x0;
  *(uint8_t*)0x200d8020 = (uint8_t)0x0;
  *(uint8_t*)0x200d8021 = (uint8_t)0x0;
  *(uint8_t*)0x200d8022 = (uint8_t)0x0;
  *(uint8_t*)0x200d8023 = (uint8_t)0x0;
  *(uint8_t*)0x200d8024 = (uint8_t)0x0;
  *(uint8_t*)0x200d8025 = (uint8_t)0xaa;
  *(uint8_t*)0x200d8026 = (uint8_t)0xfe;
  *(uint8_t*)0x200d8027 = (uint8_t)0x80;
  *(uint8_t*)0x200d8028 = (uint8_t)0x0;
  *(uint8_t*)0x200d8029 = (uint8_t)0x0;
  *(uint8_t*)0x200d802a = (uint8_t)0x0;
  *(uint8_t*)0x200d802b = (uint8_t)0x0;
  *(uint8_t*)0x200d802c = (uint8_t)0x0;
  *(uint8_t*)0x200d802d = (uint8_t)0x0;
  *(uint8_t*)0x200d802e = (uint8_t)0x0;
  *(uint8_t*)0x200d802f = (uint8_t)0x0;
  *(uint8_t*)0x200d8030 = (uint8_t)0x0;
  *(uint8_t*)0x200d8031 = (uint8_t)0x0;
  *(uint8_t*)0x200d8032 = (uint8_t)0x0;
  *(uint8_t*)0x200d8033 = (uint8_t)0x0;
  *(uint8_t*)0x200d8034 = (uint8_t)0x0;
  *(uint8_t*)0x200d8035 = (uint8_t)0xaa;
  *(uint8_t*)0x200d8036 = (uint8_t)0x2f;
  *(uint8_t*)0x200d8037 = (uint8_t)0x1;
  *(uint8_t*)0x200d8038 = (uint8_t)0x0;
  *(uint8_t*)0x200d8039 = (uint8_t)0x0;
  *(uint8_t*)0x200d803a = (uint8_t)0x0;
  *(uint8_t*)0x200d803b = (uint8_t)0x0;
  *(uint8_t*)0x200d803c = (uint8_t)0x0;
  *(uint8_t*)0x200d803d = (uint8_t)0x0;
  *(uint8_t*)0x200d803e = (uint8_t)0x5;
  *(uint8_t*)0x200d803f = (uint8_t)0x0;
  *(uint8_t*)0x200d8040 = (uint8_t)0xff;
  *(uint8_t*)0x200d8041 = (uint8_t)0x0;
  *(uint8_t*)0x200d8042 = (uint8_t)0x7;
  *(uint8_t*)0x200d8043 = (uint8_t)0x0;
  *(uint8_t*)0x200d8044 = (uint8_t)0xff;
  *(uint8_t*)0x200d8045 = (uint8_t)0x0;
  *(uint8_t*)0x200d8046 = (uint8_t)0x1;
  *(uint8_t*)0x200d8047 = (uint8_t)0x0;
  *(uint8_t*)0x200d8048 = (uint8_t)0x4;
  *(uint8_t*)0x200d8049 = (uint8_t)0x0;
  *(uint8_t*)0x200d804a = (uint8_t)0x0;
  *(uint8_t*)0x200d804b = (uint8_t)0x0;
  *(uint8_t*)0x200d804c = (uint8_t)0x0;
  *(uint8_t*)0x200d804d = (uint8_t)0x0;
  *(uint8_t*)0x200d804e = (uint8_t)0x0;
  *(uint8_t*)0x200d804f = (uint8_t)0x0;
  *(uint16_t*)0x200d8050 = (uint16_t)0x204e;
  *(uint16_t*)0x200d8052 = (uint16_t)0x204e;
  *(uint16_t*)0x200d8054 = (uint16_t)0x800;
  *(uint16_t*)0x200d8056 = (uint16_t)0x0;
  struct csum_inet csum_82;
  csum_inet_init(&csum_82);
  csum_inet_update(&csum_82, (const uint8_t*)0x200d8016, 16);
  csum_inet_update(&csum_82, (const uint8_t*)0x200d8026, 16);
  uint32_t csum_82_chunk_2 = 0x8000000;
  csum_inet_update(&csum_82, (const uint8_t*)&csum_82_chunk_2, 4);
  uint32_t csum_82_chunk_3 = 0x11000000;
  csum_inet_update(&csum_82, (const uint8_t*)&csum_82_chunk_3, 4);
  csum_inet_update(&csum_82, (const uint8_t*)0x200d8050, 8);
  *(uint16_t*)0x200d8056 = csum_inet_digest(&csum_82);
  r[83] = syz_emit_ethernet(0x58ul, 0x200d8000ul);
  r[84] = syscall(__NR_socket, 0x11ul, 0x10000000803ul, 0x0ul);
  memcpy((void*)0x2008e000, "\x20\x6f\x01\x00", 4);
  r[86] = syscall(__NR_setsockopt, r[84], 0x107ul, 0xful, 0x2008e000ul,
                  0x4ul);
  *(uint64_t*)0x20cf4f90 = (uint64_t)0x202b0000;
  *(uint32_t*)0x20cf4f98 = (uint32_t)0x60;
  *(uint64_t*)0x20cf4fa0 = (uint64_t)0x20da0fc0;
  *(uint64_t*)0x20cf4fa8 = (uint64_t)0x3;
  *(uint64_t*)0x20cf4fb0 = (uint64_t)0x208adf10;
  *(uint64_t*)0x20cf4fb8 = (uint64_t)0x10;
  *(uint32_t*)0x20cf4fc0 = (uint32_t)0x20000000;
  *(uint64_t*)0x20cf4fc8 = (uint64_t)0x20d06000;
  *(uint32_t*)0x20cf4fd0 = (uint32_t)0x60;
  *(uint64_t*)0x20cf4fd8 = (uint64_t)0x20b8bfb0;
  *(uint64_t*)0x20cf4fe0 = (uint64_t)0x0;
  *(uint64_t*)0x20cf4fe8 = (uint64_t)0x20d06fd8;
  *(uint64_t*)0x20cf4ff0 = (uint64_t)0x10;
  *(uint32_t*)0x20cf4ff8 = (uint32_t)0x10;
  *(uint16_t*)0x202b0000 = (uint16_t)0x27;
  *(uint32_t*)0x202b0004 = (uint32_t)0x4;
  *(uint32_t*)0x202b0008 = (uint32_t)0x0;
  *(uint32_t*)0x202b000c = (uint32_t)0x0;
  *(uint8_t*)0x202b0010 = (uint8_t)0x0;
  *(uint8_t*)0x202b0011 = (uint8_t)0x0;
  memcpy((void*)0x202b0012,
         "\xa2\x84\x02\x7e\x94\x77\x5b\xb0\xa6\x1c\x0a\x37\xf9\x8a\x86"
         "\xd1\x53\x9b\xce\xf0\x5a\x11\x31\x1b\x56\xeb\x8e\x51\x3a\xfa"
         "\x21\x84\x79\xb8\xc5\x41\x21\x27\x6c\x0a\x00\x67\x15\xb1\xdd"
         "\x24\xab\x77\xa3\x9e\xd8\xc2\xa4\xda\x5a\xb8\x2a\xfb\x82\x03"
         "\x30\xe4\xfe",
         63);
  *(uint64_t*)0x202b0058 = (uint64_t)0x0;
  *(uint64_t*)0x20da0fc0 = (uint64_t)0x20d06fe3;
  *(uint64_t*)0x20da0fc8 = (uint64_t)0x1d;
  *(uint64_t*)0x20da0fd0 = (uint64_t)0x204bd000;
  *(uint64_t*)0x20da0fd8 = (uint64_t)0x0;
  *(uint64_t*)0x20da0fe0 = (uint64_t)0x20d06f69;
  *(uint64_t*)0x20da0fe8 = (uint64_t)0x97;
  memcpy((void*)0x20d06fe3, "\xcb\x2f\x11\x60\x01\xf8\x13\xbc\xfb\xe7"
                            "\xa8\xd2\x8f\x40\xde\xe9\xcf\xb5\x47\x3c"
                            "\x58\x35\x64\xd2\x5a\xc8\x57\x61\xa0",
         29);
  memcpy((void*)0x20d06f69,
         "\x0a\x25\x17\x51\xc4\xa4\x0c\x9c\x56\x95\xc2\xec\x3b\x59\x41"
         "\x82\xc1\x54\x9c\x40\x89\xe1\xa6\x65\xe9\xe0\x17\x46\x37\x32"
         "\x4d\xdb\xd7\x7a\xb6\x23\x3d\x8f\x8b\x8d\x8d\xcc\xe8\x46\xdc"
         "\xb7\xf3\xa9\xf5\x61\xc2\x9d\x06\xe5\xc3\x8f\xa4\x06\x9f\xd4"
         "\xd6\x71\xc4\x1c\x71\x77\x47\x20\x4f\x3c\xde\xeb\xf9\x6d\x81"
         "\x8d\x63\x77\x5f\xec\x91\x45\xd7\xa9\xff\xc3\x99\x71\xfd\x69"
         "\x87\x61\xdc\x6d\x55\x78\x6c\xd8\x33\x5f\x2b\xe4\x98\x69\x94"
         "\x56\x68\x74\x1e\xa2\x8c\xd8\x97\x70\x3d\x09\x74\xd8\xf9\xe8"
         "\x6e\xd3\x5d\x09\xc6\x7a\xa4\x44\x30\x5d\xf2\xdf\xa4\x41\x15"
         "\xab\x43\x8c\xc7\x8b\xfc\x7a\x13\xe0\x32\x17\x47\x96\xa2\xbd"
         "\xf9",
         151);
  *(uint64_t*)0x208adf10 = (uint64_t)0x10;
  *(uint32_t*)0x208adf18 = (uint32_t)0x88;
  *(uint32_t*)0x208adf1c = (uint32_t)0x8;
  *(uint16_t*)0x20d06000 = (uint16_t)0x27;
  *(uint32_t*)0x20d06004 = (uint32_t)0xec3;
  *(uint32_t*)0x20d06008 = (uint32_t)0x4;
  *(uint32_t*)0x20d0600c = (uint32_t)0x5;
  *(uint8_t*)0x20d06010 = (uint8_t)0x9;
  *(uint8_t*)0x20d06011 = (uint8_t)0x9e5;
  memcpy((void*)0x20d06012,
         "\xde\xc4\x26\x86\x83\x59\x0a\x3f\xbd\xd1\x9e\x53\x47\xa5\xf6"
         "\xf9\x2d\x04\x5a\x6c\xf9\x0b\x5d\x4f\x75\x58\x79\x0b\xf3\x3e"
         "\x31\x0d\x6d\x1c\x86\x6e\xdf\xc3\x62\x31\x65\xe0\x18\x41\x63"
         "\x39\x6d\x47\x6e\xc8\xe2\x9d\x07\x4e\x0e\xc7\xa0\xf3\xde\x8e"
         "\x40\xbe\xa3",
         63);
  *(uint64_t*)0x20d06058 = (uint64_t)0xa6;
  *(uint64_t*)0x20d06fd8 = (uint64_t)0x10;
  *(uint32_t*)0x20d06fe0 = (uint32_t)0x0;
  *(uint32_t*)0x20d06fe4 = (uint32_t)0x401;
  r[131] = syscall(__NR_sendmmsg, r[84], 0x20cf4f90ul, 0x2ul, 0x5ul);
}

int main()
{
  use_temporary_dir();
  int pid = do_sandbox_namespace(0, true);
  int status = 0;
  while (waitpid(pid, &status, __WALL) != pid) {
  }
  return 0;
}