// https://syzkaller.appspot.com/bug?id=524be83fa28f8e505866554a99eebc187fda36bc
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <arpa/inet.h>
#include <endian.h>
#include <errno.h>
#include <net/if.h>
#include <netinet/in.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/types.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>

#ifndef __NR_bpf
#define __NR_bpf 321
#endif

static void use_temporary_dir(void)
{
  char tmpdir_template[] = "./syzkaller.XXXXXX";
  char* tmpdir = mkdtemp(tmpdir_template);
  if (!tmpdir)
    exit(1);
  if (chmod(tmpdir, 0777))
    exit(1);
  if (chdir(tmpdir))
    exit(1);
}

#define BITMASK(bf_off, bf_len) (((1ull << (bf_len)) - 1) << (bf_off))
#define STORE_BY_BITMASK(type, htobe, addr, val, bf_off, bf_len)               \
  *(type*)(addr) =                                                             \
      htobe((htobe(*(type*)(addr)) & ~BITMASK((bf_off), (bf_len))) |           \
            (((type)(val) << (bf_off)) & BITMASK((bf_off), (bf_len))))

struct nlmsg {
  char* pos;
  int nesting;
  struct nlattr* nested[8];
  char buf[4096];
};

static void netlink_init(struct nlmsg* nlmsg, int typ, int flags,
                         const void* data, int size)
{
  memset(nlmsg, 0, sizeof(*nlmsg));
  struct nlmsghdr* hdr = (struct nlmsghdr*)nlmsg->buf;
  hdr->nlmsg_type = typ;
  hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK | flags;
  memcpy(hdr + 1, data, size);
  nlmsg->pos = (char*)(hdr + 1) + NLMSG_ALIGN(size);
}

static void netlink_attr(struct nlmsg* nlmsg, int typ, const void* data,
                         int size)
{
  struct nlattr* attr = (struct nlattr*)nlmsg->pos;
  attr->nla_len = sizeof(*attr) + size;
  attr->nla_type = typ;
  if (size > 0)
    memcpy(attr + 1, data, size);
  nlmsg->pos += NLMSG_ALIGN(attr->nla_len);
}

static void netlink_nest(struct nlmsg* nlmsg, int typ)
{
  struct nlattr* attr = (struct nlattr*)nlmsg->pos;
  attr->nla_type = typ;
  nlmsg->pos += sizeof(*attr);
  nlmsg->nested[nlmsg->nesting++] = attr;
}

static void netlink_done(struct nlmsg* nlmsg)
{
  struct nlattr* attr = nlmsg->nested[--nlmsg->nesting];
  attr->nla_len = nlmsg->pos - (char*)attr;
}

static int netlink_send_ext(struct nlmsg* nlmsg, int sock, uint16_t reply_type,
                            int* reply_len, bool dofail)
{
  if (nlmsg->pos > nlmsg->buf + sizeof(nlmsg->buf) || nlmsg->nesting)
    exit(1);
  struct nlmsghdr* hdr = (struct nlmsghdr*)nlmsg->buf;
  hdr->nlmsg_len = nlmsg->pos - nlmsg->buf;
  struct sockaddr_nl addr;
  memset(&addr, 0, sizeof(addr));
  addr.nl_family = AF_NETLINK;
  ssize_t n = sendto(sock, nlmsg->buf, hdr->nlmsg_len, 0,
                     (struct sockaddr*)&addr, sizeof(addr));
  if (n != (ssize_t)hdr->nlmsg_len) {
    if (dofail)
      exit(1);
    return -1;
  }
  n = recv(sock, nlmsg->buf, sizeof(nlmsg->buf), 0);
  if (reply_len)
    *reply_len = 0;
  if (n < 0) {
    if (dofail)
      exit(1);
    return -1;
  }
  if (n < (ssize_t)sizeof(struct nlmsghdr)) {
    errno = EINVAL;
    if (dofail)
      exit(1);
    return -1;
  }
  if (hdr->nlmsg_type == NLMSG_DONE)
    return 0;
  if (reply_len && hdr->nlmsg_type == reply_type) {
    *reply_len = n;
    return 0;
  }
  if (n < (ssize_t)(sizeof(struct nlmsghdr) + sizeof(struct nlmsgerr))) {
    errno = EINVAL;
    if (dofail)
      exit(1);
    return -1;
  }
  if (hdr->nlmsg_type != NLMSG_ERROR) {
    errno = EINVAL;
    if (dofail)
      exit(1);
    return -1;
  }
  errno = -((struct nlmsgerr*)(hdr + 1))->error;
  return -errno;
}

static int netlink_send(struct nlmsg* nlmsg, int sock)
{
  return netlink_send_ext(nlmsg, sock, 0, NULL, true);
}

static int netlink_query_family_id(struct nlmsg* nlmsg, int sock,
                                   const char* family_name, bool dofail)
{
  struct genlmsghdr genlhdr;
  memset(&genlhdr, 0, sizeof(genlhdr));
  genlhdr.cmd = CTRL_CMD_GETFAMILY;
  netlink_init(nlmsg, GENL_ID_CTRL, 0, &genlhdr, sizeof(genlhdr));
  netlink_attr(nlmsg, CTRL_ATTR_FAMILY_NAME, family_name,
               strnlen(family_name, GENL_NAMSIZ - 1) + 1);
  int n = 0;
  int err = netlink_send_ext(nlmsg, sock, GENL_ID_CTRL, &n, dofail);
  if (err < 0) {
    return -1;
  }
  uint16_t id = 0;
  struct nlattr* attr = (struct nlattr*)(nlmsg->buf + NLMSG_HDRLEN +
                                         NLMSG_ALIGN(sizeof(genlhdr)));
  for (; (char*)attr < nlmsg->buf + n;
       attr = (struct nlattr*)((char*)attr + NLMSG_ALIGN(attr->nla_len))) {
    if (attr->nla_type == CTRL_ATTR_FAMILY_ID) {
      id = *(uint16_t*)(attr + 1);
      break;
    }
  }
  if (!id) {
    errno = EINVAL;
    return -1;
  }
  recv(sock, nlmsg->buf, sizeof(nlmsg->buf), 0);
  return id;
}

static void netlink_add_device_impl(struct nlmsg* nlmsg, const char* type,
                                    const char* name, bool up)
{
  struct ifinfomsg hdr;
  memset(&hdr, 0, sizeof(hdr));
  if (up)
    hdr.ifi_flags = hdr.ifi_change = IFF_UP;
  netlink_init(nlmsg, RTM_NEWLINK, NLM_F_EXCL | NLM_F_CREATE, &hdr,
               sizeof(hdr));
  if (name)
    netlink_attr(nlmsg, IFLA_IFNAME, name, strlen(name));
  netlink_nest(nlmsg, IFLA_LINKINFO);
  netlink_attr(nlmsg, IFLA_INFO_KIND, type, strlen(type));
}

static void netlink_device_change(struct nlmsg* nlmsg, int sock,
                                  const char* name, bool up, const char* master,
                                  const void* mac, int macsize,
                                  const char* new_name)
{
  struct ifinfomsg hdr;
  memset(&hdr, 0, sizeof(hdr));
  if (up)
    hdr.ifi_flags = hdr.ifi_change = IFF_UP;
  hdr.ifi_index = if_nametoindex(name);
  netlink_init(nlmsg, RTM_NEWLINK, 0, &hdr, sizeof(hdr));
  if (new_name)
    netlink_attr(nlmsg, IFLA_IFNAME, new_name, strlen(new_name));
  if (master) {
    int ifindex = if_nametoindex(master);
    netlink_attr(nlmsg, IFLA_MASTER, &ifindex, sizeof(ifindex));
  }
  if (macsize)
    netlink_attr(nlmsg, IFLA_ADDRESS, mac, macsize);
  int err = netlink_send(nlmsg, sock);
  if (err < 0) {
  }
}

static struct nlmsg nlmsg;

#define NL802154_CMD_SET_SHORT_ADDR 11
#define NL802154_ATTR_IFINDEX 3
#define NL802154_ATTR_SHORT_ADDR 10

static const char* setup_802154()
{
  const char* error = NULL;
  int sock_generic = -1;
  int sock_route = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
  if (sock_route == -1) {
    error = "socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE) failed";
    goto fail;
  }
  sock_generic = socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC);
  if (sock_generic == -1) {
    error = "socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC) failed";
    goto fail;
  }
  {
    int nl802154_family_id =
        netlink_query_family_id(&nlmsg, sock_generic, "nl802154", true);
    if (nl802154_family_id < 0) {
      error = "netlink_query_family_id failed";
      goto fail;
    }
    for (int i = 0; i < 2; i++) {
      char devname[] = "wpan0";
      devname[strlen(devname) - 1] += i;
      uint64_t hwaddr = 0xaaaaaaaaaaaa0002 + (i << 8);
      uint16_t shortaddr = 0xaaa0 + i;
      int ifindex = if_nametoindex(devname);
      struct genlmsghdr genlhdr;
      memset(&genlhdr, 0, sizeof(genlhdr));
      genlhdr.cmd = NL802154_CMD_SET_SHORT_ADDR;
      netlink_init(&nlmsg, nl802154_family_id, 0, &genlhdr, sizeof(genlhdr));
      netlink_attr(&nlmsg, NL802154_ATTR_IFINDEX, &ifindex, sizeof(ifindex));
      netlink_attr(&nlmsg, NL802154_ATTR_SHORT_ADDR, &shortaddr,
                   sizeof(shortaddr));
      if (netlink_send(&nlmsg, sock_generic) < 0) {
        error = "NL802154_CMD_SET_SHORT_ADDR failed";
        goto fail;
      }
      netlink_device_change(&nlmsg, sock_route, devname, true, 0, &hwaddr,
                            sizeof(hwaddr), 0);
      if (i == 0) {
        netlink_add_device_impl(&nlmsg, "lowpan", "lowpan0", false);
        netlink_done(&nlmsg);
        netlink_attr(&nlmsg, IFLA_LINK, &ifindex, sizeof(ifindex));
        if (netlink_send(&nlmsg, sock_route) < 0) {
          error = "netlink: adding device lowpan0 type lowpan link wpan0";
          goto fail;
        }
      }
    }
  }
fail:
  close(sock_route);
  close(sock_generic);
  return error;
}

uint64_t r[2] = {0xffffffffffffffff, 0xffffffffffffffff};

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_802154()))
    printf("the reproducer may not work as expected: 802154 injection setup "
           "failed: %s\n",
           reason);
  use_temporary_dir();
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  *(uint32_t*)0x2000000002c0 = 0x1b;
  *(uint32_t*)0x2000000002c4 = 0;
  *(uint32_t*)0x2000000002c8 = 0;
  *(uint32_t*)0x2000000002cc = 0x8000;
  *(uint32_t*)0x2000000002d0 = 0;
  *(uint32_t*)0x2000000002d4 = -1;
  *(uint32_t*)0x2000000002d8 = 0;
  memset((void*)0x2000000002dc, 0, 16);
  *(uint32_t*)0x2000000002ec = 0;
  *(uint32_t*)0x2000000002f0 = -1;
  *(uint32_t*)0x2000000002f4 = 0;
  *(uint32_t*)0x2000000002f8 = 0;
  *(uint32_t*)0x2000000002fc = 0;
  *(uint64_t*)0x200000000300 = 0;
  *(uint32_t*)0x200000000308 = 0;
  *(uint32_t*)0x20000000030c = 0;
  res =
      syscall(__NR_bpf, /*cmd=*/0ul, /*arg=*/0x2000000002c0ul, /*size=*/0x48ul);
  if (res != -1)
    r[0] = res;
  *(uint32_t*)0x200000000380 = 0x1f;
  *(uint32_t*)0x200000000384 = 0xd;
  *(uint64_t*)0x200000000388 = 0x200000000100;
  *(uint8_t*)0x200000000100 = 0x18;
  STORE_BY_BITMASK(uint8_t, , 0x200000000101, 0, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200000000101, 0, 4, 4);
  *(uint16_t*)0x200000000102 = 0;
  *(uint32_t*)0x200000000104 = 0xfffffffc;
  *(uint8_t*)0x200000000108 = 0;
  *(uint8_t*)0x200000000109 = 0;
  *(uint16_t*)0x20000000010a = 0;
  *(uint32_t*)0x20000000010c = 7;
  *(uint8_t*)0x200000000110 = 0x85;
  *(uint8_t*)0x200000000111 = 0;
  *(uint16_t*)0x200000000112 = 0;
  *(uint32_t*)0x200000000114 = 0x11;
  *(uint8_t*)0x200000000118 = 0x18;
  STORE_BY_BITMASK(uint8_t, , 0x200000000119, 1, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200000000119, 1, 4, 4);
  *(uint16_t*)0x20000000011a = 0;
  *(uint32_t*)0x20000000011c = r[0];
  *(uint8_t*)0x200000000120 = 0;
  *(uint8_t*)0x200000000121 = 0;
  *(uint16_t*)0x200000000122 = 0;
  *(uint32_t*)0x200000000124 = 0;
  STORE_BY_BITMASK(uint8_t, , 0x200000000128, 7, 0, 3);
  STORE_BY_BITMASK(uint8_t, , 0x200000000128, 0, 3, 1);
  STORE_BY_BITMASK(uint8_t, , 0x200000000128, 0xb, 4, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200000000129, 8, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200000000129, 0, 4, 4);
  *(uint16_t*)0x20000000012a = 0;
  *(uint32_t*)0x20000000012c = 0x20000002;
  STORE_BY_BITMASK(uint8_t, , 0x200000000130, 3, 0, 3);
  STORE_BY_BITMASK(uint8_t, , 0x200000000130, 3, 3, 2);
  STORE_BY_BITMASK(uint8_t, , 0x200000000130, 3, 5, 3);
  STORE_BY_BITMASK(uint8_t, , 0x200000000131, 0xa, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200000000131, 8, 4, 4);
  *(uint16_t*)0x200000000132 = 0xfff8;
  *(uint32_t*)0x200000000134 = 0;
  STORE_BY_BITMASK(uint8_t, , 0x200000000138, 7, 0, 3);
  STORE_BY_BITMASK(uint8_t, , 0x200000000138, 1, 3, 1);
  STORE_BY_BITMASK(uint8_t, , 0x200000000138, 0xb, 4, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200000000139, 2, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200000000139, 0xa, 4, 4);
  *(uint16_t*)0x20000000013a = 0;
  *(uint32_t*)0x20000000013c = 0;
  STORE_BY_BITMASK(uint8_t, , 0x200000000140, 7, 0, 3);
  STORE_BY_BITMASK(uint8_t, , 0x200000000140, 0, 3, 1);
  STORE_BY_BITMASK(uint8_t, , 0x200000000140, 0, 4, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200000000141, 2, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200000000141, 0, 4, 4);
  *(uint16_t*)0x200000000142 = 0;
  *(uint32_t*)0x200000000144 = 0xfffffff8;
  STORE_BY_BITMASK(uint8_t, , 0x200000000148, 7, 0, 3);
  STORE_BY_BITMASK(uint8_t, , 0x200000000148, 0, 3, 1);
  STORE_BY_BITMASK(uint8_t, , 0x200000000148, 0xb, 4, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200000000149, 3, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200000000149, 0, 4, 4);
  *(uint16_t*)0x20000000014a = 0;
  *(uint32_t*)0x20000000014c = 8;
  STORE_BY_BITMASK(uint8_t, , 0x200000000150, 7, 0, 3);
  STORE_BY_BITMASK(uint8_t, , 0x200000000150, 0, 3, 1);
  STORE_BY_BITMASK(uint8_t, , 0x200000000150, 0xb, 4, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200000000151, 4, 0, 4);
  STORE_BY_BITMASK(uint8_t, , 0x200000000151, 0, 4, 4);
  *(uint16_t*)0x200000000152 = 0;
  *(uint32_t*)0x200000000154 = 1;
  *(uint8_t*)0x200000000158 = 0x85;
  *(uint8_t*)0x200000000159 = 0;
  *(uint16_t*)0x20000000015a = 0;
  *(uint32_t*)0x20000000015c = 0xa6;
  *(uint8_t*)0x200000000160 = 0x95;
  *(uint8_t*)0x200000000161 = 0;
  *(uint16_t*)0x200000000162 = 0;
  *(uint32_t*)0x200000000164 = 0;
  *(uint64_t*)0x200000000390 = 0x2000000000c0;
  memcpy((void*)0x2000000000c0, "GPL\000", 4);
  *(uint32_t*)0x200000000398 = 0;
  *(uint32_t*)0x20000000039c = 0;
  *(uint64_t*)0x2000000003a0 = 0;
  *(uint32_t*)0x2000000003a8 = 0;
  *(uint32_t*)0x2000000003ac = 0x34;
  memset((void*)0x2000000003b0, 0, 16);
  *(uint32_t*)0x2000000003c0 = 0;
  *(uint32_t*)0x2000000003c4 = 0;
  *(uint32_t*)0x2000000003c8 = -1;
  *(uint32_t*)0x2000000003cc = 8;
  *(uint64_t*)0x2000000003d0 = 0;
  *(uint32_t*)0x2000000003d8 = 0;
  *(uint32_t*)0x2000000003dc = 0x10;
  *(uint64_t*)0x2000000003e0 = 0;
  *(uint32_t*)0x2000000003e8 = 0;
  *(uint32_t*)0x2000000003ec = 0;
  *(uint32_t*)0x2000000003f0 = 0;
  *(uint32_t*)0x2000000003f4 = 0;
  *(uint64_t*)0x2000000003f8 = 0;
  *(uint64_t*)0x200000000400 = 0;
  *(uint32_t*)0x200000000408 = 0x10;
  *(uint32_t*)0x20000000040c = 0xfff;
  *(uint32_t*)0x200000000410 = 0;
  res =
      syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x200000000380ul, /*size=*/0x94ul);
  if (res != -1)
    r[1] = res;
  *(uint32_t*)0x200000000500 = r[1];
  *(uint32_t*)0x200000000504 = 0;
  *(uint32_t*)0x200000000508 = 0;
  *(uint32_t*)0x20000000050c = 0;
  *(uint64_t*)0x200000000510 = 0;
  *(uint64_t*)0x200000000518 = 0;
  *(uint32_t*)0x200000000520 = 0;
  *(uint32_t*)0x200000000524 = 0;
  *(uint32_t*)0x200000000528 = 0;
  *(uint32_t*)0x20000000052c = 0;
  *(uint64_t*)0x200000000530 = 0;
  *(uint64_t*)0x200000000538 = 0;
  *(uint32_t*)0x200000000540 = 0;
  *(uint32_t*)0x200000000544 = 0;
  *(uint32_t*)0x200000000548 = 0;
  syscall(__NR_bpf, /*cmd=*/0xaul, /*arg=*/0x200000000500ul, /*size=*/0x48ul);
  return 0;
}