// https://syzkaller.appspot.com/bug?id=bf172344c5f1d3487a4feff67c3dd30e08d5b635
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <setjmp.h>
#include <signal.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/netlink.h>

static __thread int skip_segv;
static __thread jmp_buf segv_env;

static void segv_handler(int sig, siginfo_t* info, void* ctx)
{
  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(...)                                                        \
  {                                                                            \
    __atomic_fetch_add(&skip_segv, 1, __ATOMIC_SEQ_CST);                       \
    if (_setjmp(segv_env) == 0) {                                              \
      __VA_ARGS__;                                                             \
    }                                                                          \
    __atomic_fetch_sub(&skip_segv, 1, __ATOMIC_SEQ_CST);                       \
  }

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))))

static long syz_open_dev(volatile long a0, volatile long a1, volatile long a2)
{
  if (a0 == 0xc || a0 == 0xb) {
    char buf[128];
    sprintf(buf, "/dev/%s/%d:%d", a0 == 0xc ? "char" : "block", (uint8_t)a1,
            (uint8_t)a2);
    return open(buf, O_RDWR, 0);
  } else {
    char buf[1024];
    char* hash;
    strncpy(buf, (char*)a0, sizeof(buf) - 1);
    buf[sizeof(buf) - 1] = 0;
    while ((hash = strchr(buf, '#'))) {
      *hash = '0' + (char)(a1 % 10);
      a1 /= 10;
    }
    return open(buf, a2, 0);
  }
}

static long syz_genetlink_get_family_id(volatile long name)
{
  char buf[512] = {0};
  struct nlmsghdr* hdr = (struct nlmsghdr*)buf;
  struct genlmsghdr* genlhdr = (struct genlmsghdr*)NLMSG_DATA(hdr);
  struct nlattr* attr = (struct nlattr*)(genlhdr + 1);
  hdr->nlmsg_len =
      sizeof(*hdr) + sizeof(*genlhdr) + sizeof(*attr) + GENL_NAMSIZ;
  hdr->nlmsg_type = GENL_ID_CTRL;
  hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
  genlhdr->cmd = CTRL_CMD_GETFAMILY;
  attr->nla_type = CTRL_ATTR_FAMILY_NAME;
  attr->nla_len = sizeof(*attr) + GENL_NAMSIZ;
  strncpy((char*)(attr + 1), (char*)name, GENL_NAMSIZ);
  struct iovec iov = {hdr, hdr->nlmsg_len};
  struct sockaddr_nl addr = {0};
  addr.nl_family = AF_NETLINK;
  int fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC);
  if (fd == -1) {
    return -1;
  }
  struct msghdr msg = {&addr, sizeof(addr), &iov, 1, NULL, 0, 0};
  if (sendmsg(fd, &msg, 0) == -1) {
    close(fd);
    return -1;
  }
  ssize_t n = recv(fd, buf, sizeof(buf), 0);
  close(fd);
  if (n <= 0) {
    return -1;
  }
  if (hdr->nlmsg_type != GENL_ID_CTRL) {
    return -1;
  }
  for (; (char*)attr < buf + n;
       attr = (struct nlattr*)((char*)attr + NLMSG_ALIGN(attr->nla_len))) {
    if (attr->nla_type == CTRL_ATTR_FAMILY_ID)
      return *(uint16_t*)(attr + 1);
  }
  return -1;
}

uint64_t r[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0x0};

int main(void)
{
  syscall(__NR_mmap, 0x1ffff000ul, 0x1000ul, 0ul, 0x32ul, -1, 0ul);
  syscall(__NR_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x32ul, -1, 0ul);
  syscall(__NR_mmap, 0x21000000ul, 0x1000ul, 0ul, 0x32ul, -1, 0ul);
  install_segv_handler();
  use_temporary_dir();
  intptr_t res = 0;
  syscall(__NR_socket, 0x200000000000011ul, 2ul, 0);
  syscall(__NR_dup, -1);
  NONFAILING(*(uint64_t*)0x20000840 = 0x20000240);
  NONFAILING(*(uint16_t*)0x20000240 = 2);
  NONFAILING(*(uint16_t*)0x20000242 = htobe16(0x4e20));
  NONFAILING(*(uint8_t*)0x20000244 = 0xac);
  NONFAILING(*(uint8_t*)0x20000245 = 0x14);
  NONFAILING(*(uint8_t*)0x20000246 = 0x14);
  NONFAILING(*(uint8_t*)0x20000247 = 0xaa);
  NONFAILING(*(uint32_t*)0x20000848 = 0x10);
  NONFAILING(*(uint64_t*)0x20000850 = 0x20000740);
  NONFAILING(*(uint64_t*)0x20000740 = 0x200002c0);
  NONFAILING(memcpy((void*)0x200002c0, "\x37\x56\xac\xa4\xf6\x06\x1e\x7c", 8));
  NONFAILING(*(uint64_t*)0x20000748 = 8);
  NONFAILING(*(uint64_t*)0x20000750 = 0);
  NONFAILING(*(uint64_t*)0x20000758 = 0);
  NONFAILING(*(uint64_t*)0x20000760 = 0x20000380);
  NONFAILING(memcpy((void*)0x20000380,
                    "\x5c\x08\x6d\xc3\x81\x7a\x88\x05\xfb\x3d\xf7\xb3\xd6\x3d"
                    "\x13\x72\xd6\x12\x59\x12\xcc\xfa\x4d\x22\x61\xd2\xf8\x6f"
                    "\xa6\x6e\x55\x30\xd5\xd5\x1c\xf4\xb9\xb9\xef\xf6\x1d\x3e"
                    "\x78\x90\x3a\x94\xf4\xa9\xb0\x6f\x77\x64\x40\xc1\x93\xef"
                    "\x13\x5d\xe7\x3d\xb7\x11\x51\x44\x34\xc7\x3d\xe2",
                    68));
  NONFAILING(*(uint64_t*)0x20000768 = 0x44);
  NONFAILING(*(uint64_t*)0x20000770 = 0);
  NONFAILING(*(uint64_t*)0x20000778 = 0);
  NONFAILING(*(uint64_t*)0x20000780 = 0);
  NONFAILING(*(uint64_t*)0x20000788 = 0);
  NONFAILING(*(uint64_t*)0x20000790 = 0x20000640);
  NONFAILING(*(uint64_t*)0x20000798 = 0);
  NONFAILING(*(uint64_t*)0x200007a0 = 0);
  NONFAILING(*(uint64_t*)0x200007a8 = 0);
  NONFAILING(*(uint64_t*)0x200007b0 = 0x200005c0);
  NONFAILING(memcpy((void*)0x200005c0, "\xab\xfb\x81\xa0\xb7\x06\x47\x11\xba"
                                       "\xfc\x2b\xc4\xa7\xa2\x02\x4f\xcd\x22"
                                       "\x08\xa9\x06\x31\xb4\xe6\xb4\x2e\x6a"
                                       "\x7a\x38\xdd\x28\x74\x9c\x4c\xcf\x29"
                                       "\x8f\x0d\x6f\x62\x95\x10\x9e",
                    43));
  NONFAILING(*(uint64_t*)0x200007b8 = 0x2b);
  NONFAILING(*(uint64_t*)0x20000858 = 8);
  NONFAILING(*(uint64_t*)0x20000860 = 0x200007c0);
  NONFAILING(*(uint64_t*)0x200007c0 = 0x14);
  NONFAILING(*(uint32_t*)0x200007c8 = 0);
  NONFAILING(*(uint32_t*)0x200007cc = 1);
  NONFAILING(*(uint32_t*)0x200007d0 = 8);
  NONFAILING(*(uint64_t*)0x200007d8 = 0x11);
  NONFAILING(*(uint32_t*)0x200007e0 = 0);
  NONFAILING(*(uint32_t*)0x200007e4 = 1);
  NONFAILING(*(uint8_t*)0x200007e8 = 0x1f);
  NONFAILING(*(uint64_t*)0x200007f0 = 0x1c);
  NONFAILING(*(uint32_t*)0x200007f8 = 0);
  NONFAILING(*(uint32_t*)0x200007fc = 8);
  NONFAILING(*(uint32_t*)0x20000800 = 0);
  NONFAILING(*(uint8_t*)0x20000804 = 0xac);
  NONFAILING(*(uint8_t*)0x20000805 = 0x14);
  NONFAILING(*(uint8_t*)0x20000806 = 0x14);
  NONFAILING(*(uint8_t*)0x20000807 = 0xaa);
  NONFAILING(*(uint32_t*)0x20000808 = htobe32(0x7f000001));
  NONFAILING(*(uint64_t*)0x20000868 = 0x50);
  NONFAILING(*(uint32_t*)0x20000870 = 0);
  syscall(__NR_sendmsg, -1, 0x20000840ul, 0x80ul);
  NONFAILING(memcpy((void*)0x20000040, "/dev/bus/usb/00#/00#\000", 21));
  res = -1;
  NONFAILING(res = syz_open_dev(0x20000040, 0x4000000000000071, 0x28081));
  if (res != -1)
    r[0] = res;
  res = syscall(__NR_socket, 0x10ul, 3ul, 0x10);
  if (res != -1)
    r[1] = res;
  res = -1;
  NONFAILING(res = syz_genetlink_get_family_id(0));
  if (res != -1)
    r[2] = res;
  NONFAILING(*(uint64_t*)0x200001c0 = 0);
  NONFAILING(*(uint32_t*)0x200001c8 = 0);
  NONFAILING(*(uint64_t*)0x200001d0 = 0x20000140);
  NONFAILING(*(uint64_t*)0x20000140 = 0x20000000);
  NONFAILING(*(uint32_t*)0x20000000 = 0x1c);
  NONFAILING(*(uint16_t*)0x20000004 = r[2]);
  NONFAILING(*(uint16_t*)0x20000006 = 1);
  NONFAILING(*(uint32_t*)0x20000008 = 0);
  NONFAILING(*(uint32_t*)0x2000000c = 0);
  NONFAILING(*(uint8_t*)0x20000010 = 0x4c);
  NONFAILING(*(uint8_t*)0x20000011 = 0);
  NONFAILING(*(uint16_t*)0x20000012 = 0);
  NONFAILING(*(uint16_t*)0x20000014 = 8);
  NONFAILING(STORE_BY_BITMASK(uint16_t, , 0x20000016, 0x11d, 0, 14));
  NONFAILING(STORE_BY_BITMASK(uint16_t, , 0x20000017, 0, 6, 1));
  NONFAILING(STORE_BY_BITMASK(uint16_t, , 0x20000017, 1, 7, 1));
  NONFAILING(*(uint16_t*)0x20000018 = 4);
  NONFAILING(*(uint16_t*)0x2000001a = 1);
  NONFAILING(*(uint64_t*)0x20000148 = 0x1c);
  NONFAILING(*(uint64_t*)0x200001d8 = 1);
  NONFAILING(*(uint64_t*)0x200001e0 = 0);
  NONFAILING(*(uint64_t*)0x200001e8 = 0);
  NONFAILING(*(uint32_t*)0x200001f0 = 0);
  syscall(__NR_sendmsg, r[1], 0x200001c0ul, 0ul);
  NONFAILING(*(uint32_t*)0x200000c0 = 0);
  NONFAILING(*(uint32_t*)0x200000c4 = 0x5516);
  NONFAILING(*(uint64_t*)0x200000c8 = 0);
  syscall(__NR_ioctl, r[0], 0xc0105512, 0x200000c0ul);
  NONFAILING(STORE_BY_BITMASK(uint8_t, , 0x20000000, 1, 0, 7));
  NONFAILING(STORE_BY_BITMASK(uint8_t, , 0x20000000, 1, 7, 1));
  syscall(__NR_ioctl, r[0], 0xc0105502, 0x20000000ul);
  return 0;
}