// https://syzkaller.appspot.com/bug?id=11c50242b350e92e4d1e8ab042997a8ed55d1dc1
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <arpa/inet.h>
#include <dirent.h>
#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <net/if.h>
#include <netinet/in.h>
#include <setjmp.h>
#include <signal.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.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 __thread int clone_ongoing;
static __thread int skip_segv;
static __thread jmp_buf segv_env;

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

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

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

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

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

static 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_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;
}

const int kInitNetNsFd = 201;

static long syz_init_net_socket(volatile long domain, volatile long type,
                                volatile long proto)
{
  return syscall(__NR_socket, domain, type, proto);
}

static long syz_genetlink_get_family_id(volatile long name,
                                        volatile long sock_arg)
{
  int fd = sock_arg;
  if (fd < 0) {
    fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC);
    if (fd == -1) {
      return -1;
    }
  }
  struct nlmsg nlmsg_tmp;
  int ret = netlink_query_family_id(&nlmsg_tmp, fd, (char*)name, false);
  if ((int)sock_arg < 0)
    close(fd);
  if (ret < 0) {
    return -1;
  }
  return ret;
}

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");
}

static void execute_one(void);

#define WAIT_FLAGS __WALL

static void loop(void)
{
  int iter = 0;
  for (;; iter++) {
    int pid = fork();
    if (pid < 0)
      exit(1);
    if (pid == 0) {
      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;
    }
  }
}

uint64_t r[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff};

void execute_one(void)
{
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  ioctl$EXT4_IOC_SWAP_BOOT arguments: [
  //    fd: fd (resource)
  //    cmd: const = 0x6611 (4 bytes)
  //  ]
  syscall(__NR_ioctl, /*fd=*/(intptr_t)-1, /*cmd=*/0x6611, 0);
  //  setsockopt$SO_ATTACH_FILTER arguments: [
  //    fd: sock (resource)
  //    level: const = 0x1 (4 bytes)
  //    optname: const = 0x1a (4 bytes)
  //    optval: nil
  //    optlen: len = 0x0 (8 bytes)
  //  ]
  syscall(__NR_setsockopt, /*fd=*/(intptr_t)-1, /*level=*/1, /*optname=*/0x1a,
          /*optval=*/0ul, /*optlen=*/0ul);
  //  setsockopt$inet_tcp_TCP_CONGESTION arguments: [
  //    fd: sock_tcp (resource)
  //    level: const = 0x6 (4 bytes)
  //    optname: const = 0xd (4 bytes)
  //    optval: nil
  //    optlen: len = 0x0 (8 bytes)
  //  ]
  syscall(__NR_setsockopt, /*fd=*/(intptr_t)-1, /*level=*/6, /*optname=*/0xd,
          /*optval=*/0ul, /*optlen=*/0ul);
  //  sendmsg$nl_route_sched arguments: [
  //    fd: sock_nl_route (resource)
  //    msg: nil
  //    f: send_flags = 0x0 (8 bytes)
  //  ]
  syscall(__NR_sendmsg, /*fd=*/(intptr_t)-1, /*msg=*/0ul, /*f=*/0ul);
  //  sendmsg$nl_route_sched arguments: [
  //    fd: sock_nl_route (resource)
  //    msg: ptr[in, msghdr_netlink[netlink_msg_route_sched]] {
  //      msghdr_netlink[netlink_msg_route_sched] {
  //        addr: nil
  //        addrlen: len = 0x0 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //        vec: ptr[in, iovec[in, netlink_msg_route_sched]] {
  //          iovec[in, netlink_msg_route_sched] {
  //            addr: nil
  //            len: len = 0x0 (8 bytes)
  //          }
  //        }
  //        vlen: const = 0x1 (8 bytes)
  //        ctrl: const = 0x0 (8 bytes)
  //        ctrllen: const = 0x0 (8 bytes)
  //        f: send_flags = 0x0 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //      }
  //    }
  //    f: send_flags = 0x0 (8 bytes)
  //  ]
  NONFAILING(*(uint64_t*)0x200000000480 = 0);
  NONFAILING(*(uint32_t*)0x200000000488 = 0);
  NONFAILING(*(uint64_t*)0x200000000490 = 0x2000000004c0);
  NONFAILING(*(uint64_t*)0x2000000004c0 = 0);
  NONFAILING(*(uint64_t*)0x2000000004c8 = 0);
  NONFAILING(*(uint64_t*)0x200000000498 = 1);
  NONFAILING(*(uint64_t*)0x2000000004a0 = 0);
  NONFAILING(*(uint64_t*)0x2000000004a8 = 0);
  NONFAILING(*(uint32_t*)0x2000000004b0 = 0);
  syscall(__NR_sendmsg, /*fd=*/(intptr_t)-1, /*msg=*/0x200000000480ul,
          /*f=*/0ul);
  //  sendmmsg$inet arguments: [
  //    fd: sock (resource)
  //    mmsg: nil
  //    vlen: len = 0x0 (8 bytes)
  //    f: send_flags = 0x0 (8 bytes)
  //  ]
  syscall(__NR_sendmmsg, /*fd=*/(intptr_t)-1, /*mmsg=*/0ul, /*vlen=*/0ul,
          /*f=*/0ul);
  //  ioctl$TUNSETIFF arguments: [
  //    fd: fd_tun (resource)
  //    cmd: const = 0x400454ca (4 bytes)
  //    arg: nil
  //  ]
  syscall(__NR_ioctl, /*fd=*/(intptr_t)-1, /*cmd=*/0x400454ca, /*arg=*/0ul);
  //  socket$inet6_sctp arguments: [
  //    domain: const = 0xa (8 bytes)
  //    type: sctp_socket_type = 0x1 (8 bytes)
  //    proto: const = 0x84 (4 bytes)
  //  ]
  //  returns sock_sctp6
  res = syscall(__NR_socket, /*domain=*/0xaul, /*type=SOCK_STREAM*/ 1ul,
                /*proto=*/0x84);
  if (res != -1)
    r[0] = res;
  //  getpeername$packet arguments: [
  //    fd: sock_packet (resource)
  //    peer: nil
  //    peerlen: nil
  //  ]
  syscall(__NR_getpeername, /*fd=*/(intptr_t)-1, /*peer=*/0ul, /*peerlen=*/0ul);
  //  ioctl$sock_inet6_SIOCDIFADDR arguments: [
  //    fd: sock_in6 (resource)
  //    cmd: const = 0x8936 (4 bytes)
  //    arg: ptr[in, in6_ifreq] {
  //      in6_ifreq {
  //        ifr6_addr: union ipv6_addr {
  //          rand_addr: buffer: {20 01 00 00 00 00 00 00 00 00 00 00 00 00 00
  //          00} (length 0x10)
  //        }
  //        ifr6_prefixlen: int32 = 0x33 (4 bytes)
  //        ifr6_ifindex: ifindex (resource)
  //      }
  //    }
  //  ]
  NONFAILING(memcpy(
      (void*)0x200000000340,
      " \001\000\000\000\000\000\000\000\000\000\000\000\000\000\000", 16));
  NONFAILING(*(uint32_t*)0x200000000350 = 0x33);
  NONFAILING(*(uint32_t*)0x200000000354 = 0);
  syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0x8936, /*arg=*/0x200000000340ul);
  //  syz_init_net_socket$nl_generic arguments: [
  //    domain: const = 0x10 (8 bytes)
  //    type: const = 0x3 (8 bytes)
  //    proto: const = 0x10 (8 bytes)
  //  ]
  //  returns sock_nl_generic_init
  res = -1;
  NONFAILING(
      res = syz_init_net_socket(/*domain=*/0x10, /*type=*/3, /*proto=*/0x10));
  if (res != -1)
    r[1] = res;
  //  syz_genetlink_get_family_id$nbd arguments: [
  //    name: ptr[in, buffer] {
  //      buffer: {6e 62 64 00} (length 0x4)
  //    }
  //    fd: sock_nl_generic_init (resource)
  //  ]
  //  returns genl_nbd_family_id
  NONFAILING(memcpy((void*)0x2000000000c0, "nbd\000", 4));
  res = -1;
  NONFAILING(
      res = syz_genetlink_get_family_id(/*name=*/0x2000000000c0, /*fd=*/-1));
  if (res != -1)
    r[2] = res;
  //  syz_genetlink_get_family_id$ethtool arguments: [
  //    name: nil
  //    fd: sock_nl_generic (resource)
  //  ]
  //  returns genl_ethtool_family_id
  NONFAILING(syz_genetlink_get_family_id(/*name=*/0, /*fd=*/-1));
  //  sendmsg$NBD_CMD_CONNECT arguments: [
  //    fd: sock_nl_generic_init (resource)
  //    msg: ptr[in, msghdr_netlink[netlink_msg_t[genl_nbd_family_id,
  //    genlmsghdr_t[NBD_CMD_CONNECT], nbd_attr_policy]]] {
  //      msghdr_netlink[netlink_msg_t[genl_nbd_family_id,
  //      genlmsghdr_t[NBD_CMD_CONNECT], nbd_attr_policy]] {
  //        addr: nil
  //        addrlen: len = 0x0 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //        vec: ptr[in, iovec[in, netlink_msg_t[genl_nbd_family_id,
  //        genlmsghdr_t[NBD_CMD_CONNECT], nbd_attr_policy]]] {
  //          iovec[in, netlink_msg_t[genl_nbd_family_id,
  //          genlmsghdr_t[NBD_CMD_CONNECT], nbd_attr_policy]] {
  //            addr: ptr[inout, array[ANYUNION]] {
  //              array[ANYUNION] {
  //                union ANYUNION {
  //                  ANYBLOB: buffer: {68 00 00 00} (length 0x4)
  //                }
  //                union ANYUNION {
  //                  ANYRES16: ANYRES16 (resource)
  //                }
  //                union ANYUNION {
  //                  ANYBLOB: buffer: {01 00 00 00 00 00 00 00 00 00 01 00 00
  //                  00 08 00 01 00 40 00 00 00 0c 00 02 00 70 0f 00 00 00 00
  //                  00 00 0c 00 06 00 03 00 00 00 00 00 00 00 0a 00 0a 00 27
  //                  2d 5d 29 21 2b 00 00 14 00 07} (length 0x3d)
  //                }
  //              }
  //            }
  //            len: len = 0x6c (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)
  //  ]
  NONFAILING(*(uint64_t*)0x200000000240 = 0);
  NONFAILING(*(uint32_t*)0x200000000248 = 0);
  NONFAILING(*(uint64_t*)0x200000000250 = 0x200000000000);
  NONFAILING(*(uint64_t*)0x200000000000 = 0x2000000003c0);
  NONFAILING(memcpy((void*)0x2000000003c0, "h\000\000\000", 4));
  NONFAILING(*(uint16_t*)0x2000000003c4 = r[2]);
  NONFAILING(
      memcpy((void*)0x2000000003c6,
             "\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x08\x00"
             "\x01\x00\x40\x00\x00\x00\x0c\x00\x02\x00\x70\x0f\x00\x00\x00\x00"
             "\x00\x00\x0c\x00\x06\x00\x03\x00\x00\x00\x00\x00\x00\x00\x0a\x00"
             "\x0a\x00\x27\x2d\x5d\x29\x21\x2b\x00\x00\x14\x00\x07",
             61));
  NONFAILING(*(uint64_t*)0x200000000008 = 0x6c);
  NONFAILING(*(uint64_t*)0x200000000258 = 1);
  NONFAILING(*(uint64_t*)0x200000000260 = 0);
  NONFAILING(*(uint64_t*)0x200000000268 = 0);
  NONFAILING(*(uint32_t*)0x200000000270 = 0);
  syscall(__NR_sendmsg, /*fd=*/r[1], /*msg=*/0x200000000240ul, /*f=*/0ul);
  //  sendmsg$NL80211_CMD_CHANNEL_SWITCH arguments: [
  //    fd: sock_nl_generic (resource)
  //    msg: ptr[in, msghdr_netlink[netlink_msg_t[nl80211_family_id,
  //    msg_nl80211_payload[NL80211_CMD_CHANNEL_SWITCH, nl80211_wdev_payload],
  //    nl80211_policy$chsw]]] {
  //      msghdr_netlink[netlink_msg_t[nl80211_family_id,
  //      msg_nl80211_payload[NL80211_CMD_CHANNEL_SWITCH, nl80211_wdev_payload],
  //      nl80211_policy$chsw]] {
  //        addr: nil
  //        addrlen: len = 0x0 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //        vec: nil
  //        vlen: const = 0x1 (8 bytes)
  //        ctrl: const = 0x0 (8 bytes)
  //        ctrllen: const = 0x0 (8 bytes)
  //        f: send_flags = 0x1 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //      }
  //    }
  //    f: send_flags = 0x4000000 (8 bytes)
  //  ]
  NONFAILING(*(uint64_t*)0x200000000900 = 0);
  NONFAILING(*(uint32_t*)0x200000000908 = 0);
  NONFAILING(*(uint64_t*)0x200000000910 = 0);
  NONFAILING(*(uint64_t*)0x200000000918 = 1);
  NONFAILING(*(uint64_t*)0x200000000920 = 0);
  NONFAILING(*(uint64_t*)0x200000000928 = 0);
  NONFAILING(*(uint32_t*)0x200000000930 = 1);
  syscall(__NR_sendmsg, /*fd=*/(intptr_t)-1, /*msg=*/0x200000000900ul,
          /*f=MSG_ZEROCOPY*/ 0x4000000ul);
  //  sendmsg$NLBL_MGMT_C_LISTALL arguments: [
  //    fd: sock_nl_generic_init (resource)
  //    msg: ptr[in, msghdr_netlink[netlink_msg_t[netlbl_mgmt_family_id,
  //    genlmsghdr_t[NLBL_MGMT_C_LISTALL], netlbl_mgmt_genl_policy]]] {
  //      msghdr_netlink[netlink_msg_t[netlbl_mgmt_family_id,
  //      genlmsghdr_t[NLBL_MGMT_C_LISTALL], netlbl_mgmt_genl_policy]] {
  //        addr: nil
  //        addrlen: len = 0x0 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //        vec: nil
  //        vlen: const = 0x1 (8 bytes)
  //        ctrl: const = 0x0 (8 bytes)
  //        ctrllen: const = 0x0 (8 bytes)
  //        f: send_flags = 0x4000 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //      }
  //    }
  //    f: send_flags = 0x20008000 (8 bytes)
  //  ]
  NONFAILING(*(uint64_t*)0x200000000300 = 0);
  NONFAILING(*(uint32_t*)0x200000000308 = 0);
  NONFAILING(*(uint64_t*)0x200000000310 = 0);
  NONFAILING(*(uint64_t*)0x200000000318 = 1);
  NONFAILING(*(uint64_t*)0x200000000320 = 0);
  NONFAILING(*(uint64_t*)0x200000000328 = 0);
  NONFAILING(*(uint32_t*)0x200000000330 = 0x4000);
  syscall(__NR_sendmsg, /*fd=*/r[1], /*msg=*/0x200000000300ul,
          /*f=MSG_FASTOPEN|MSG_MORE*/ 0x20008000ul);
}
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;
  install_segv_handler();
  loop();
  return 0;
}