// https://syzkaller.appspot.com/bug?id=dfe934fe24fd6d2ce493572ac41ad4502fa4bd52
// 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/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_fcntl
#define __NR_fcntl 25
#endif
#ifndef __NR_ftruncate
#define __NR_ftruncate 46
#endif
#ifndef __NR_ioctl
#define __NR_ioctl 29
#endif
#ifndef __NR_memfd_create
#define __NR_memfd_create 279
#endif
#ifndef __NR_mmap
#define __NR_mmap 222
#endif
#ifndef __NR_openat
#define __NR_openat 56
#endif

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 unsigned int queue_count = 2;

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_attr(nlmsg, IFLA_NUM_TX_QUEUES, &queue_count, sizeof(queue_count));
  netlink_attr(nlmsg, IFLA_NUM_RX_QUEUES, &queue_count, sizeof(queue_count));
  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[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff};

int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x20000000ul, /*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=*/0x21000000ul, /*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);
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  openat$udambuf arguments: [
  //    fd: const = 0xffffffffffffff9c (8 bytes)
  //    file: ptr[in, buffer] {
  //      buffer: {2f 64 65 76 2f 75 64 6d 61 62 75 66 00} (length 0xd)
  //    }
  //    flags: const = 0x2 (4 bytes)
  //  ]
  //  returns fd_udambuf
  memcpy((void*)0x20000040, "/dev/udmabuf\000", 13);
  res = syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul, /*file=*/0x20000040ul,
                /*flags=*/2, 0);
  if (res != -1)
    r[0] = res;
  //  memfd_create arguments: [
  //    name: ptr[in, buffer] {
  //      buffer: {79 10 35 fb f7 75 83 25 3a 72 c2 b9 78 a4 71 c1 ea 5f 8c 5a
  //      37 e7 61 de 6e 4a eb 87 9b 11 78 0e a1 cf 1a 98 53 37 c9 00 00 00 00
  //      00 00 07 00 00 00 00 00 00 04 87 39 a2 34 a9 61 6d de b2 d3 cb 5a 4a
  //      6f 61 c4 1a 63 42 aa c1 fb 20 51 d4 f4 01 a5 32 e2 44 47 d4 bd 7b 9f
  //      a9 97 9b 40 db 00 62 e1 62 72 b6 00 38 e3 10 ff c2 9d 0d 32 9e 8e 04
  //      73 57 1b b7 b3 a2 c9 26 40 ca da dc e2 2f 97 58 ac 08 b0 c2 3c 80 45
  //      1a bc c7 57 da 39 56 73 41 af c6 cf e1 a1 b5 4d a2 85 a6 79 c4 4a f1
  //      f7 fc 44 95 e3 eb c7 bc 91 b0 a8 9e 6f eb 46 28 9d 4c 01 76 52 6b aa
  //      63 42 04 a7 49 0b 86 45 5a 96 d5 14 4f 44 5c e8 52 e4 cd ec cc d1 0f
  //      72 65 e8 36 cd eb c4 24 98 06 4a d6 64 44 8d 5f 55 60 6a 69 7b ab 97
  //      af 3b 6c 1f af b3 38 55 cb fa b3 6a 92 0c e0 81 a0 a2 2d 67 08 99 0e
  //      8d 8d 16 d9 77 5c f0 ce b0 6a 9d 27 93 ef 1d a0 48 d9 bd d9 af 12}
  //      (length 0x110)
  //    }
  //    flags: memfd_flags = 0x2 (8 bytes)
  //  ]
  //  returns fd_memfd
  memcpy((void*)0x20000340,
         "y\0205\373\367u\203%:r\302\271x\244q\301\352_"
         "\214Z7\347a\336nJ\353\207\233\021x\016\241\317\032\230S7\311\000\000"
         "\000\000\000\000\a\000\000\000\000\000\000\004\2079\2424\251am\336"
         "\262\323\313ZJoa\304\032cB\252\301\373 "
         "Q\324\364\001\2452\342DG\324\275{\237\251\227\233@"
         "\333\000b\341br\266\0008\343\020\377\302\235\r2\236\216\004sW\033\267"
         "\263\242\311&@\312\332\334\342/"
         "\227X\254\b\260\302<"
         "\200E\032\274\307W\3329VsA\257\306\317\341\241\265M\242\205\246y\304J"
         "\361\367\374D\225\343\353\307\274\221\260\250\236o\353F("
         "\235L\001vRk\252cB\004\247I\v\206EZ\226\325\024OD\\\350R\344\315\354"
         "\314\321\017re\3506\315\353\304$\230\006J\326dD\215_U`ji{"
         "\253\227\257;l\037\257\2638U\313\372\263j\222\f\340\201\240\242-"
         "g\b\231\016\215\215\026\331w\\\360\316\260j\235\'\223\357\035\240H"
         "\331\275\331\257\022",
         272);
  res = syscall(__NR_memfd_create, /*name=*/0x20000340ul,
                /*flags=MFD_ALLOW_SEALING*/ 2ul);
  if (res != -1)
    r[1] = res;
  //  ftruncate arguments: [
  //    fd: fd (resource)
  //    len: intptr = 0xffff (8 bytes)
  //  ]
  syscall(__NR_ftruncate, /*fd=*/r[1], /*len=*/0xfffful);
  //  fcntl$addseals arguments: [
  //    fd: fd (resource)
  //    cmd: const = 0x409 (8 bytes)
  //    seals: seal_types = 0x7 (8 bytes)
  //  ]
  syscall(__NR_fcntl, /*fd=*/r[1], /*cmd=*/0x409ul,
          /*seals=F_SEAL_GROW|F_SEAL_SHRINK|F_SEAL_SEAL*/ 7ul);
  //  ioctl$UDMABUF_CREATE arguments: [
  //    fd: fd_udambuf (resource)
  //    cmd: const = 0x40187542 (4 bytes)
  //    arg: ptr[in, udmabuf_create] {
  //      udmabuf_create {
  //        memfd: fd_memfd (resource)
  //        flags: int32 = 0x0 (4 bytes)
  //        offset: udmabuf_offset_size = 0x0 (8 bytes)
  //        size: udmabuf_offset_size = 0x4000 (8 bytes)
  //      }
  //    }
  //  ]
  //  returns fd_dma_buf
  *(uint32_t*)0x20000140 = r[1];
  *(uint32_t*)0x20000144 = 0;
  *(uint64_t*)0x20000148 = 0;
  *(uint64_t*)0x20000150 = 0x4000;
  res = syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0x40187542,
                /*arg=*/0x20000140ul);
  if (res != -1)
    r[2] = res;
  //  mmap arguments: [
  //    addr: VMA[0x3000]
  //    len: len = 0x3000 (8 bytes)
  //    prot: mmap_prot = 0x2000000 (8 bytes)
  //    flags: mmap_flags = 0x13 (8 bytes)
  //    fd: fd (resource)
  //    offset: intptr = 0x0 (8 bytes)
  //  ]
  syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0x3000ul,
          /*prot=PROT_GROWSUP*/ 0x2000000ul,
          /*flags=MAP_SHARED_VALIDATE|MAP_FIXED*/ 0x13ul, /*fd=*/r[2],
          /*offset=*/0ul);
  return 0;
}