// https://syzkaller.appspot.com/bug?id=ed1635305772f890a85428f0f4f5c6bb5e37fb0b
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <dirent.h>
#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/prctl.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.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;
}

#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;
}

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");
}

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;
}

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[8] = {0xffffffffffffffff,
                 0xffffffffffffffff,
                 0xffffffffffffffff,
                 0xffffffffffffffff,
                 0x0,
                 0xffffffffffffffff,
                 0xffffffffffffffff,
                 0x0};

void execute_one(void)
{
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  socket$unix arguments: [
  //    domain: const = 0x1 (8 bytes)
  //    type: unix_socket_type = 0x1 (8 bytes)
  //    proto: const = 0x0 (4 bytes)
  //  ]
  //  returns sock_unix
  res = syscall(__NR_socket, /*domain=*/1ul, /*type=SOCK_STREAM*/ 1ul,
                /*proto=*/0);
  if (res != -1)
    r[0] = res;
  //  socket$unix arguments: [
  //    domain: const = 0x1 (8 bytes)
  //    type: unix_socket_type = 0x1 (8 bytes)
  //    proto: const = 0x0 (4 bytes)
  //  ]
  //  returns sock_unix
  res = syscall(__NR_socket, /*domain=*/1ul, /*type=SOCK_STREAM*/ 1ul,
                /*proto=*/0);
  if (res != -1)
    r[1] = res;
  //  openat$tun arguments: [
  //    fd: const = 0xffffffffffffff9c (8 bytes)
  //    file: ptr[in, buffer] {
  //      buffer: {2f 64 65 76 2f 6e 65 74 2f 74 75 6e 00} (length 0xd)
  //    }
  //    flags: open_flags = 0x0 (4 bytes)
  //    mode: const = 0x0 (2 bytes)
  //  ]
  //  returns fd_tun
  memcpy((void*)0x200000000240, "/dev/net/tun\000", 13);
  res = syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul,
                /*file=*/0x200000000240ul, /*flags=*/0, /*mode=*/0);
  if (res != -1)
    r[2] = res;
  //  ioctl$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 = 0x7101 (2 bytes) pad = 0x0
  //        (22 bytes)
  //      }
  //    }
  //  ]
  memcpy((void*)0x200000000040, "syzkaller0\000\000\000\000\000\000", 16);
  *(uint16_t*)0x200000000050 = 0x7101;
  syscall(__NR_ioctl, /*fd=*/r[2], /*cmd=*/0x400454ca,
          /*arg=*/0x200000000040ul);
  //  socket arguments: [
  //    domain: socket_domain = 0x400000000010 (8 bytes)
  //    type: socket_type = 0x3 (8 bytes)
  //    proto: int32 = 0x0 (4 bytes)
  //  ]
  //  returns sock
  res = syscall(__NR_socket,
                /*domain=AF_NETLINK|0x400000000000*/ 0x400000000010ul,
                /*type=SOCK_RAW*/ 3ul, /*proto=*/0);
  if (res != -1)
    r[3] = res;
  //  ioctl$sock_SIOCGIFINDEX arguments: [
  //    fd: sock (resource)
  //    cmd: const = 0x8933 (4 bytes)
  //    arg: ptr[out, ifreq_dev_t[devnames, ifindex]] {
  //      ifreq_dev_t[devnames, ifindex] {
  //        ifr_ifrn: buffer: {73 79 7a 6b 61 6c 6c 65 72 30 00 00 00 00 00 00}
  //        (length 0x10) elem: ifindex (resource) pad = 0x0 (20 bytes)
  //      }
  //    }
  //  ]
  memcpy((void*)0x200000000100, "syzkaller0\000\000\000\000\000\000", 16);
  res = syscall(__NR_ioctl, /*fd=*/r[1], /*cmd=*/0x8933,
                /*arg=*/0x200000000100ul);
  if (res != -1)
    r[4] = *(uint32_t*)0x200000000110;
  //  sendmsg$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 = 0x38 (4 bytes)
  //                  type: const = 0x24 (2 bytes)
  //                  flags: netlink_msg_flags = 0x4ee4e6a52ff56541 (2 bytes)
  //                  seq: int32 = 0x70bd2a (4 bytes)
  //                  pid: int32 = 0xffffffff (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 = 0xfff1 (2 bytes)
  //                    }
  //                    tcm_parent: tcm_handle {
  //                      minor: tcm_handle_offsets = 0xffff (2 bytes)
  //                      major: tcm_handle_offsets = 0xffff (2 bytes)
  //                    }
  //                    tcm_info: tcm_handle {
  //                      minor: tcm_handle_offsets = 0x0 (2 bytes)
  //                      major: tcm_handle_offsets = 0xb (2 bytes)
  //                    }
  //                  }
  //                  attrs: array[rtm_tca_policy] {
  //                    union rtm_tca_policy {
  //                      qdisc_kind_options: union qdisc_kind_options {
  //                        q_multiq: tca_kind_options_t["multiq",
  //                        tc_multiq_qopt] {
  //                          TCA_KIND: nlattr_t[const[TCA_KIND, int16],
  //                          string["multiq"]] {
  //                            nla_len: offsetof = 0xb (2 bytes)
  //                            nla_type: const = 0x1 (2 bytes)
  //                            payload: buffer: {6d 75 6c 74 69 71 00} (length
  //                            0x7) size: buffer: {} (length 0x0) pad = 0x0 (1
  //                            bytes)
  //                          }
  //                          TCA_OPTIONS: nlattr_t[const[TCA_OPTIONS, int16],
  //                          tc_multiq_qopt] {
  //                            nla_len: offsetof = 0x8 (2 bytes)
  //                            nla_type: const = 0x2 (2 bytes)
  //                            payload: tc_multiq_qopt {
  //                              bands: int16 = 0x0 (2 bytes)
  //                              max_bands: int16 = 0x2 (2 bytes)
  //                            }
  //                            size: buffer: {} (length 0x0)
  //                          }
  //                        }
  //                      }
  //                    }
  //                  }
  //                }
  //              }
  //            }
  //            len: len = 0x38 (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*)0x2000000012c0 = 0;
  *(uint32_t*)0x2000000012c8 = 0;
  *(uint64_t*)0x2000000012d0 = 0x200000000080;
  *(uint64_t*)0x200000000080 = 0x2000000005c0;
  *(uint32_t*)0x2000000005c0 = 0x38;
  *(uint16_t*)0x2000000005c4 = 0x24;
  *(uint16_t*)0x2000000005c6 = 0x6541;
  *(uint32_t*)0x2000000005c8 = 0x70bd2a;
  *(uint32_t*)0x2000000005cc = -1;
  *(uint8_t*)0x2000000005d0 = 0;
  *(uint8_t*)0x2000000005d1 = 0;
  *(uint16_t*)0x2000000005d2 = 0;
  *(uint32_t*)0x2000000005d4 = r[4];
  *(uint16_t*)0x2000000005d8 = 0;
  *(uint16_t*)0x2000000005da = 0xfff1;
  *(uint16_t*)0x2000000005dc = -1;
  *(uint16_t*)0x2000000005de = -1;
  *(uint16_t*)0x2000000005e0 = 0;
  *(uint16_t*)0x2000000005e2 = 0xb;
  *(uint16_t*)0x2000000005e4 = 0xb;
  *(uint16_t*)0x2000000005e6 = 1;
  memcpy((void*)0x2000000005e8, "multiq\000", 7);
  *(uint16_t*)0x2000000005f0 = 8;
  *(uint16_t*)0x2000000005f2 = 2;
  *(uint16_t*)0x2000000005f4 = 0;
  *(uint16_t*)0x2000000005f6 = 2;
  *(uint64_t*)0x200000000088 = 0x38;
  *(uint64_t*)0x2000000012d8 = 1;
  *(uint64_t*)0x2000000012e0 = 0;
  *(uint64_t*)0x2000000012e8 = 0;
  *(uint32_t*)0x2000000012f0 = 0;
  syscall(__NR_sendmsg, /*fd=*/r[3], /*msg=*/0x2000000012c0ul, /*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 = 0x98 (4 bytes)
  //                  type: const = 0x2c (2 bytes)
  //                  flags: netlink_msg_flags = 0xd27 (2 bytes)
  //                  seq: int32 = 0x30bd29 (4 bytes)
  //                  pid: int32 = 0x25dfdc00 (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 = 0xd (2 bytes)
  //                      major: tcm_handle_offsets = 0x5 (2 bytes)
  //                    }
  //                    tcm_parent: tcm_handle {
  //                      minor: tcm_handle_offsets = 0x0 (2 bytes)
  //                      major: tcm_handle_offsets = 0x0 (2 bytes)
  //                    }
  //                    tcm_info: tcm_handle {
  //                      minor: tcm_handle_offsets = 0x7 (2 bytes)
  //                      major: tcm_handle_offsets = 0x3 (2 bytes)
  //                    }
  //                  }
  //                  attrs: array[filter_policy] {
  //                    union filter_policy {
  //                      filter_kind_options: union filter_kind_options {
  //                        f_matchall: tca_kind_options_t["matchall",
  //                        array[mall_policy]] {
  //                          TCA_KIND: nlattr_t[const[TCA_KIND, int16],
  //                          string["matchall"]] {
  //                            nla_len: offsetof = 0xd (2 bytes)
  //                            nla_type: const = 0x1 (2 bytes)
  //                            payload: buffer: {6d 61 74 63 68 61 6c 6c 00}
  //                            (length 0x9) size: buffer: {} (length 0x0) pad =
  //                            0x0 (3 bytes)
  //                          }
  //                          TCA_OPTIONS: nlattr_t[const[TCA_OPTIONS, int16],
  //                          array[mall_policy]] {
  //                            nla_len: offsetof = 0x64 (2 bytes)
  //                            nla_type: const = 0x2 (2 bytes)
  //                            payload: array[mall_policy] {
  //                              union mall_policy {
  //                                TCA_MATCHALL_ACT:
  //                                nlattr_t[const[TCA_MATCHALL_ACT, int16],
  //                                array[tca_actions]] {
  //                                  nla_len: offsetof = 0x60 (2 bytes)
  //                                  nla_type: const = 0x2 (2 bytes)
  //                                  payload: array[tca_actions] {
  //                                    union tca_actions {
  //                                      m_ife:
  //                                      nlattr_tt[int16:14[0:TCA_ACT_MAX_PRIO],
  //                                      0, 0, tcf_action_policy["ife",
  //                                      ife_policy]] {
  //                                        nla_len: offsetof = 0x5c (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["ife", ife_policy]
  //                                        {
  //                                          TCA_ACT_KIND:
  //                                          nlattr_t[const[TCA_ACT_KIND,
  //                                          int16], string["ife"]] {
  //                                            nla_len: offsetof = 0x8 (2
  //                                            bytes) nla_type: const = 0x1 (2
  //                                            bytes) payload: buffer: {69 66
  //                                            65 00} (length 0x4) size:
  //                                            buffer: {} (length 0x0)
  //                                          }
  //                                          TCA_ACT_OPTIONS:
  //                                          nlattr_tt[const[TCA_ACT_OPTIONS,
  //                                          int16:14], 0, 1,
  //                                          array[ife_policy]] {
  //                                            nla_len: offsetof = 0x34 (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[ife_policy] {
  //                                              union ife_policy {
  //                                                TCA_IFE_PARMS:
  //                                                nlattr_t[const[TCA_IFE_PARMS,
  //                                                int16], tc_ife] {
  //                                                  nla_len: offsetof = 0x1c
  //                                                  (2 bytes) nla_type: const
  //                                                  = 0x1 (2 bytes) payload:
  //                                                  tc_ife {
  //                                                    tc_gen: tc_gen {
  //                                                      index: int32 = 0x8 (4
  //                                                      bytes) capab: int32 =
  //                                                      0xfff (4 bytes)
  //                                                      action: tc_actions =
  //                                                      0x0 (4 bytes) refcnt:
  //                                                      int32 = 0xa (4 bytes)
  //                                                      bindcnt: int32 = 0x3
  //                                                      (4 bytes)
  //                                                    }
  //                                                    flags: int16 = 0x1 (2
  //                                                    bytes) pad = 0x0 (2
  //                                                    bytes)
  //                                                  }
  //                                                  size: buffer: {} (length
  //                                                  0x0)
  //                                                }
  //                                              }
  //                                              union ife_policy {
  //                                                TCA_IFE_METALST:
  //                                                nlattr_t[const[TCA_IFE_METALST,
  //                                                int16],
  //                                                array[tca_ife_meta_policy]]
  //                                                {
  //                                                  nla_len: offsetof = 0x14
  //                                                  (2 bytes) nla_type: const
  //                                                  = 0x6 (2 bytes) payload:
  //                                                  array[tca_ife_meta_policy]
  //                                                  {
  //                                                    union
  //                                                    tca_ife_meta_policy {
  //                                                      IFE_META_PRIO:
  //                                                      nlattr_t[const[IFE_META_PRIO,
  //                                                      int16],
  //                                                      optional[int32]] {
  //                                                        nla_len: offsetof =
  //                                                        0x8 (2 bytes)
  //                                                        nla_type: const =
  //                                                        0x3 (2 bytes)
  //                                                        payload: union
  //                                                        optional[int32] {
  //                                                          val: int32 = 0x7
  //                                                          (4 bytes)
  //                                                        }
  //                                                        size: buffer: {}
  //                                                        (length 0x0)
  //                                                      }
  //                                                    }
  //                                                    union
  //                                                    tca_ife_meta_policy {
  //                                                      IFE_META_TCINDEX:
  //                                                      nlattr_t[const[IFE_META_TCINDEX,
  //                                                      int16],
  //                                                      optional[int16]] {
  //                                                        nla_len: offsetof =
  //                                                        0x6 (2 bytes)
  //                                                        nla_type: const =
  //                                                        0x5 (2 bytes)
  //                                                        payload: union
  //                                                        optional[int16] {
  //                                                          val: int16 = 0x8
  //                                                          (2 bytes)
  //                                                        }
  //                                                        size: buffer: {}
  //                                                        (length 0x0)
  //                                                      }
  //                                                    }
  //                                                  }
  //                                                  size: buffer: {} (length
  //                                                  0x0)
  //                                                }
  //                                              }
  //                                            }
  //                                            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 =
  //                                              0x2 (4 bytes) selector:
  //                                              tcf_action_policy_hw_stats =
  //                                              0x3 (4 bytes)
  //                                            }
  //                                            size: buffer: {} (length 0x0)
  //                                          }
  //                                        }
  //                                        size: buffer: {} (length 0x0)
  //                                      }
  //                                    }
  //                                  }
  //                                  size: buffer: {} (length 0x0)
  //                                }
  //                              }
  //                            }
  //                            size: buffer: {} (length 0x0)
  //                          }
  //                        }
  //                      }
  //                    }
  //                  }
  //                }
  //              }
  //            }
  //            len: len = 0x98 (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*)0x200000000580 = 0;
  *(uint32_t*)0x200000000588 = 0;
  *(uint64_t*)0x200000000590 = 0x2000000006c0;
  *(uint64_t*)0x2000000006c0 = 0x200000000280;
  *(uint32_t*)0x200000000280 = 0x98;
  *(uint16_t*)0x200000000284 = 0x2c;
  *(uint16_t*)0x200000000286 = 0xd27;
  *(uint32_t*)0x200000000288 = 0x30bd29;
  *(uint32_t*)0x20000000028c = 0x25dfdc00;
  *(uint8_t*)0x200000000290 = 0;
  *(uint8_t*)0x200000000291 = 0;
  *(uint16_t*)0x200000000292 = 0;
  *(uint32_t*)0x200000000294 = r[4];
  *(uint16_t*)0x200000000298 = 0xd;
  *(uint16_t*)0x20000000029a = 5;
  *(uint16_t*)0x20000000029c = 0;
  *(uint16_t*)0x20000000029e = 0;
  *(uint16_t*)0x2000000002a0 = 7;
  *(uint16_t*)0x2000000002a2 = 3;
  *(uint16_t*)0x2000000002a4 = 0xd;
  *(uint16_t*)0x2000000002a6 = 1;
  memcpy((void*)0x2000000002a8, "matchall\000", 9);
  *(uint16_t*)0x2000000002b4 = 0x64;
  *(uint16_t*)0x2000000002b6 = 2;
  *(uint16_t*)0x2000000002b8 = 0x60;
  *(uint16_t*)0x2000000002ba = 2;
  *(uint16_t*)0x2000000002bc = 0x5c;
  STORE_BY_BITMASK(uint16_t, , 0x2000000002be, 1, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x2000000002bf, 0, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x2000000002bf, 0, 7, 1);
  *(uint16_t*)0x2000000002c0 = 8;
  *(uint16_t*)0x2000000002c2 = 1;
  memcpy((void*)0x2000000002c4, "ife\000", 4);
  *(uint16_t*)0x2000000002c8 = 0x34;
  STORE_BY_BITMASK(uint16_t, , 0x2000000002ca, 2, 0, 14);
  STORE_BY_BITMASK(uint16_t, , 0x2000000002cb, 0, 6, 1);
  STORE_BY_BITMASK(uint16_t, , 0x2000000002cb, 1, 7, 1);
  *(uint16_t*)0x2000000002cc = 0x1c;
  *(uint16_t*)0x2000000002ce = 1;
  *(uint32_t*)0x2000000002d0 = 8;
  *(uint32_t*)0x2000000002d4 = 0xfff;
  *(uint32_t*)0x2000000002d8 = 0;
  *(uint32_t*)0x2000000002dc = 0xa;
  *(uint32_t*)0x2000000002e0 = 3;
  *(uint16_t*)0x2000000002e4 = 1;
  *(uint16_t*)0x2000000002e8 = 0x14;
  *(uint16_t*)0x2000000002ea = 6;
  *(uint16_t*)0x2000000002ec = 8;
  *(uint16_t*)0x2000000002ee = 3;
  *(uint32_t*)0x2000000002f0 = 7;
  *(uint16_t*)0x2000000002f4 = 6;
  *(uint16_t*)0x2000000002f6 = 5;
  *(uint16_t*)0x2000000002f8 = 8;
  *(uint16_t*)0x2000000002fc = 4;
  *(uint16_t*)0x2000000002fe = 6;
  *(uint16_t*)0x200000000300 = 0xc;
  *(uint16_t*)0x200000000302 = 7;
  *(uint32_t*)0x200000000304 = 0;
  *(uint32_t*)0x200000000308 = 0;
  *(uint16_t*)0x20000000030c = 0xc;
  *(uint16_t*)0x20000000030e = 8;
  *(uint32_t*)0x200000000310 = 2;
  *(uint32_t*)0x200000000314 = 3;
  *(uint64_t*)0x2000000006c8 = 0x98;
  *(uint64_t*)0x200000000598 = 1;
  *(uint64_t*)0x2000000005a0 = 0;
  *(uint64_t*)0x2000000005a8 = 0;
  *(uint32_t*)0x2000000005b0 = 0;
  syscall(__NR_sendmsg, /*fd=*/r[3], /*msg=*/0x200000000580ul, /*f=*/0ul);
  //  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 = 0x0 (4 bytes)
  //    mode: const = 0x0 (2 bytes)
  //  ]
  //  returns fd_tun
  memcpy((void*)0x200000000400, "/dev/net/tun\000", 13);
  res = syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul,
                /*file=*/0x200000000400ul, /*flags=*/0, /*mode=*/0);
  if (res != -1)
    r[5] = res;
  //  close arguments: [
  //    fd: fd (resource)
  //  ]
  syscall(__NR_close, /*fd=*/r[5]);
  //  socket$inet_sctp arguments: [
  //    domain: const = 0x2 (8 bytes)
  //    type: sctp_socket_type = 0x5 (8 bytes)
  //    proto: const = 0x84 (4 bytes)
  //  ]
  //  returns sock_sctp
  syscall(__NR_socket, /*domain=*/2ul, /*type=SOCK_SEQPACKET*/ 5ul,
          /*proto=*/0x84);
  //  ioctl$SIOCSIFHWADDR arguments: [
  //    fd: fd_tun (resource)
  //    cmd: const = 0x8914 (4 bytes)
  //    arg: ptr[in, ifreq_dev_t[devnames, mac_addr]] {
  //      ifreq_dev_t[devnames, mac_addr] {
  //        ifr_ifrn: buffer: {73 79 7a 6b 61 6c 6c 65 72 30 00 00 00 00 00 00}
  //        (length 0x10) elem: union mac_addr {
  //          link_local: mac_addr_link_local {
  //            a0: const = 0x1 (1 bytes)
  //            a1: const = 0x80 (1 bytes)
  //            a2: const = 0xc2 (1 bytes)
  //            a3: const = 0x0 (1 bytes)
  //            a4: const = 0x0 (1 bytes)
  //            a5: mac_addr_link_local_values = 0x0 (1 bytes)
  //          }
  //        }
  //        pad = 0x0 (18 bytes)
  //      }
  //    }
  //  ]
  memcpy((void*)0x200000002280, "syzkaller0\000\000\000\000\000\000", 16);
  *(uint8_t*)0x200000002290 = 1;
  *(uint8_t*)0x200000002291 = 0x80;
  *(uint8_t*)0x200000002292 = 0xc2;
  *(uint8_t*)0x200000002293 = 0;
  *(uint8_t*)0x200000002294 = 0;
  *(uint8_t*)0x200000002295 = 0;
  syscall(__NR_ioctl, /*fd=*/r[5], /*cmd=*/0x8914, /*arg=*/0x200000002280ul);
  //  socket$kcm arguments: [
  //    domain: const = 0x11 (8 bytes)
  //    type: kcm_socket_type = 0x3 (8 bytes)
  //    proto: const = 0x0 (4 bytes)
  //  ]
  //  returns sock_kcm
  res = syscall(__NR_socket, /*domain=*/0x11ul, /*type=SOCK_DGRAM|0x1*/ 3ul,
                /*proto=*/0);
  if (res != -1)
    r[6] = res;
  //  ioctl$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*)0x200000000100, "syzkaller0\000\000\000\000\000\000", 16);
  res = syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0x8933,
                /*arg=*/0x200000000100ul);
  if (res != -1)
    r[7] = *(uint32_t*)0x200000000110;
  //  sendmsg$kcm arguments: [
  //    fd: sock_kcm (resource)
  //    msg: ptr[in, send_msghdr] {
  //      send_msghdr {
  //        msg_name: ptr[in, sockaddr_storage] {
  //          union sockaddr_storage {
  //            xdp: sockaddr_xdp {
  //              sxdp_family: const = 0x2c (2 bytes)
  //              sxdp_flags: sxdp_flags = 0x7 (2 bytes)
  //              sxdp_ifindex: ifindex (resource)
  //              sxdp_queue_id: int32 = 0x3e (4 bytes)
  //              sxdp_shared_umem_fd: const = 0x0 (4 bytes)
  //            }
  //          }
  //        }
  //        msg_namelen: len = 0x80 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //        msg_iov: ptr[in, array[iovec[in, array[int8]]]] {
  //          array[iovec[in, array[int8]]] {
  //            iovec[in, array[int8]] {
  //              addr: ptr[in, buffer] {
  //                buffer: {0d} (length 0x1)
  //              }
  //              len: len = 0x1 (8 bytes)
  //            }
  //          }
  //        }
  //        msg_iovlen: len = 0x1 (8 bytes)
  //        msg_control: nil
  //        msg_controllen: bytesize = 0x0 (8 bytes)
  //        msg_flags: const = 0x0 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //      }
  //    }
  //    f: send_flags = 0x4 (8 bytes)
  //  ]
  *(uint64_t*)0x2000000000c0 = 0x200000000380;
  *(uint16_t*)0x200000000380 = 0x2c;
  *(uint16_t*)0x200000000382 = 7;
  *(uint32_t*)0x200000000384 = r[7];
  *(uint32_t*)0x200000000388 = 0x3e;
  *(uint32_t*)0x20000000038c = 0;
  *(uint32_t*)0x2000000000c8 = 0x80;
  *(uint64_t*)0x2000000000d0 = 0x200000000080;
  *(uint64_t*)0x200000000080 = 0x200000000140;
  memset((void*)0x200000000140, 13, 1);
  *(uint64_t*)0x200000000088 = 1;
  *(uint64_t*)0x2000000000d8 = 1;
  *(uint64_t*)0x2000000000e0 = 0;
  *(uint64_t*)0x2000000000e8 = 0;
  *(uint32_t*)0x2000000000f0 = 0;
  inject_fault(6);
  syscall(__NR_sendmsg, /*fd=*/r[6], /*msg=*/0x2000000000c0ul,
          /*f=MSG_DONTROUTE*/ 4ul);
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffffffff000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x200000000000ul, /*len=*/0x1000000ul,
          /*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=*/0x1000ul, /*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);
  loop();
  return 0;
}