syzkaller-repros/linux/a38e23797f2789815c40071f867f4b020b0ed99f.c

// INFO: trying to register non-static key in ni6501_detach
// https://syzkaller.appspot.com/bug?id=a38e23797f2789815c40071f867f4b020b0ed99f
// status:fixed
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <arpa/inet.h>
#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <net/if.h>
#include <net/if_arp.h>
#include <netinet/in.h>
#include <sched.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/mount.h>
#include <sys/prctl.h>
#include <sys/resource.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>

#include <linux/if_addr.h>
#include <linux/if_ether.h>
#include <linux/if_link.h>
#include <linux/if_tun.h>
#include <linux/in6.h>
#include <linux/ip.h>
#include <linux/neighbour.h>
#include <linux/net.h>
#include <linux/netlink.h>
#include <linux/rtnetlink.h>
#include <linux/tcp.h>
#include <linux/usb/ch9.h>
#include <linux/veth.h>

unsigned long long procid;

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

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);
}

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 struct {
  char* pos;
  int nesting;
  struct nlattr* nested[8];
  char buf[1024];
} nlmsg;

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

static int netlink_send(int sock)
{
  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;
  unsigned n = sendto(sock, nlmsg.buf, hdr->nlmsg_len, 0,
                      (struct sockaddr*)&addr, sizeof(addr));
  if (n != hdr->nlmsg_len)
    exit(1);
  n = recv(sock, nlmsg.buf, sizeof(nlmsg.buf), 0);
  if (n < sizeof(struct nlmsghdr) + sizeof(struct nlmsgerr))
    exit(1);
  if (hdr->nlmsg_type != NLMSG_ERROR)
    exit(1);
  return -((struct nlmsgerr*)(hdr + 1))->error;
}

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

static int netlink_add_addr(int sock, const char* dev, const void* addr,
                            int addrsize)
{
  struct ifaddrmsg hdr;
  memset(&hdr, 0, sizeof(hdr));
  hdr.ifa_family = addrsize == 4 ? AF_INET : AF_INET6;
  hdr.ifa_prefixlen = addrsize == 4 ? 24 : 120;
  hdr.ifa_scope = RT_SCOPE_UNIVERSE;
  hdr.ifa_index = if_nametoindex(dev);
  netlink_init(RTM_NEWADDR, NLM_F_CREATE | NLM_F_REPLACE, &hdr, sizeof(hdr));
  netlink_attr(IFA_LOCAL, addr, addrsize);
  netlink_attr(IFA_ADDRESS, addr, addrsize);
  return netlink_send(sock);
}

static void netlink_add_addr4(int sock, const char* dev, const char* addr)
{
  struct in_addr in_addr;
  inet_pton(AF_INET, addr, &in_addr);
  int err = netlink_add_addr(sock, dev, &in_addr, sizeof(in_addr));
  (void)err;
}

static void netlink_add_addr6(int sock, const char* dev, const char* addr)
{
  struct in6_addr in6_addr;
  inet_pton(AF_INET6, addr, &in6_addr);
  int err = netlink_add_addr(sock, dev, &in6_addr, sizeof(in6_addr));
  (void)err;
}

static void netlink_add_neigh(int sock, const char* name, const void* addr,
                              int addrsize, const void* mac, int macsize)
{
  struct ndmsg hdr;
  memset(&hdr, 0, sizeof(hdr));
  hdr.ndm_family = addrsize == 4 ? AF_INET : AF_INET6;
  hdr.ndm_ifindex = if_nametoindex(name);
  hdr.ndm_state = NUD_PERMANENT;
  netlink_init(RTM_NEWNEIGH, NLM_F_EXCL | NLM_F_CREATE, &hdr, sizeof(hdr));
  netlink_attr(NDA_DST, addr, addrsize);
  netlink_attr(NDA_LLADDR, mac, macsize);
  int err = netlink_send(sock);
  (void)err;
}

static int tunfd = -1;
static int tun_frags_enabled;
#define SYZ_TUN_MAX_PACKET_SIZE 1000

#define TUN_IFACE "syz_tun"

#define LOCAL_MAC 0xaaaaaaaaaaaa
#define REMOTE_MAC 0xaaaaaaaaaabb

#define LOCAL_IPV4 "172.20.20.170"
#define REMOTE_IPV4 "172.20.20.187"

#define LOCAL_IPV6 "fe80::aa"
#define REMOTE_IPV6 "fe80::bb"

#define IFF_NAPI 0x0010
#define IFF_NAPI_FRAGS 0x0020

static void initialize_tun(void)
{
  tunfd = open("/dev/net/tun", O_RDWR | O_NONBLOCK);
  if (tunfd == -1) {
    printf("tun: can't open /dev/net/tun: please enable CONFIG_TUN=y\n");
    printf("otherwise fuzzing or reproducing might not work as intended\n");
    return;
  }
  const int kTunFd = 240;
  if (dup2(tunfd, kTunFd) < 0)
    exit(1);
  close(tunfd);
  tunfd = kTunFd;
  struct ifreq ifr;
  memset(&ifr, 0, sizeof(ifr));
  strncpy(ifr.ifr_name, TUN_IFACE, IFNAMSIZ);
  ifr.ifr_flags = IFF_TAP | IFF_NO_PI | IFF_NAPI | IFF_NAPI_FRAGS;
  if (ioctl(tunfd, TUNSETIFF, (void*)&ifr) < 0) {
    ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
    if (ioctl(tunfd, TUNSETIFF, (void*)&ifr) < 0)
      exit(1);
  }
  if (ioctl(tunfd, TUNGETIFF, (void*)&ifr) < 0)
    exit(1);
  tun_frags_enabled = (ifr.ifr_flags & IFF_NAPI_FRAGS) != 0;
  char sysctl[64];
  sprintf(sysctl, "/proc/sys/net/ipv6/conf/%s/accept_dad", TUN_IFACE);
  write_file(sysctl, "0");
  sprintf(sysctl, "/proc/sys/net/ipv6/conf/%s/router_solicitations", TUN_IFACE);
  write_file(sysctl, "0");
  int sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
  if (sock == -1)
    exit(1);
  netlink_add_addr4(sock, TUN_IFACE, LOCAL_IPV4);
  netlink_add_addr6(sock, TUN_IFACE, LOCAL_IPV6);
  uint64_t macaddr = REMOTE_MAC;
  struct in_addr in_addr;
  inet_pton(AF_INET, REMOTE_IPV4, &in_addr);
  netlink_add_neigh(sock, TUN_IFACE, &in_addr, sizeof(in_addr), &macaddr,
                    ETH_ALEN);
  struct in6_addr in6_addr;
  inet_pton(AF_INET6, REMOTE_IPV6, &in6_addr);
  netlink_add_neigh(sock, TUN_IFACE, &in6_addr, sizeof(in6_addr), &macaddr,
                    ETH_ALEN);
  macaddr = LOCAL_MAC;
  netlink_device_change(sock, TUN_IFACE, true, 0, &macaddr, ETH_ALEN);
  close(sock);
}

#define USB_MAX_EP_NUM 32

struct usb_device_index {
  struct usb_device_descriptor* dev;
  struct usb_config_descriptor* config;
  unsigned config_length;
  struct usb_interface_descriptor* iface;
  struct usb_endpoint_descriptor* eps[USB_MAX_EP_NUM];
  unsigned eps_num;
};

static bool parse_usb_descriptor(char* buffer, size_t length,
                                 struct usb_device_index* index)
{
  if (length <
      sizeof(*index->dev) + sizeof(*index->config) + sizeof(*index->iface))
    return false;
  index->dev = (struct usb_device_descriptor*)buffer;
  index->config = (struct usb_config_descriptor*)(buffer + sizeof(*index->dev));
  index->config_length = length - sizeof(*index->dev);
  index->iface =
      (struct usb_interface_descriptor*)(buffer + sizeof(*index->dev) +
                                         sizeof(*index->config));
  index->eps_num = 0;
  size_t offset = 0;
  while (true) {
    if (offset == length)
      break;
    if (offset + 1 < length)
      break;
    uint8_t length = buffer[offset];
    uint8_t type = buffer[offset + 1];
    if (type == USB_DT_ENDPOINT) {
      index->eps[index->eps_num] =
          (struct usb_endpoint_descriptor*)(buffer + offset);
      index->eps_num++;
    }
    if (index->eps_num == USB_MAX_EP_NUM)
      break;
    offset += length;
  }
  return true;
}

enum usb_fuzzer_event_type {
  USB_FUZZER_EVENT_INVALID,
  USB_FUZZER_EVENT_CONNECT,
  USB_FUZZER_EVENT_DISCONNECT,
  USB_FUZZER_EVENT_SUSPEND,
  USB_FUZZER_EVENT_RESUME,
  USB_FUZZER_EVENT_CONTROL,
};

struct usb_fuzzer_event {
  uint32_t type;
  uint32_t length;
  char data[0];
};

struct usb_fuzzer_init {
  uint64_t speed;
  const char* driver_name;
  const char* device_name;
};

struct usb_fuzzer_ep_io {
  uint16_t ep;
  uint16_t flags;
  uint32_t length;
  char data[0];
};

#define USB_FUZZER_IOCTL_INIT _IOW('U', 0, struct usb_fuzzer_init)
#define USB_FUZZER_IOCTL_RUN _IO('U', 1)
#define USB_FUZZER_IOCTL_EP0_READ _IOWR('U', 2, struct usb_fuzzer_event)
#define USB_FUZZER_IOCTL_EP0_WRITE _IOW('U', 3, struct usb_fuzzer_ep_io)
#define USB_FUZZER_IOCTL_EP_ENABLE _IOW('U', 4, struct usb_endpoint_descriptor)
#define USB_FUZZER_IOCTL_EP_WRITE _IOW('U', 6, struct usb_fuzzer_ep_io)
#define USB_FUZZER_IOCTL_CONFIGURE _IO('U', 8)
#define USB_FUZZER_IOCTL_VBUS_DRAW _IOW('U', 9, uint32_t)

int usb_fuzzer_open()
{
  return open("/sys/kernel/debug/usb-fuzzer", O_RDWR);
}

int usb_fuzzer_init(int fd, uint32_t speed, const char* driver,
                    const char* device)
{
  struct usb_fuzzer_init arg;
  arg.speed = speed;
  arg.driver_name = driver;
  arg.device_name = device;
  return ioctl(fd, USB_FUZZER_IOCTL_INIT, &arg);
}

int usb_fuzzer_run(int fd)
{
  return ioctl(fd, USB_FUZZER_IOCTL_RUN, 0);
}

int usb_fuzzer_ep0_read(int fd, struct usb_fuzzer_event* event)
{
  return ioctl(fd, USB_FUZZER_IOCTL_EP0_READ, event);
}

int usb_fuzzer_ep0_write(int fd, struct usb_fuzzer_ep_io* io)
{
  return ioctl(fd, USB_FUZZER_IOCTL_EP0_WRITE, io);
}

int usb_fuzzer_ep_write(int fd, struct usb_fuzzer_ep_io* io)
{
  return ioctl(fd, USB_FUZZER_IOCTL_EP_WRITE, io);
}

int usb_fuzzer_ep_enable(int fd, struct usb_endpoint_descriptor* desc)
{
  return ioctl(fd, USB_FUZZER_IOCTL_EP_ENABLE, desc);
}

int usb_fuzzer_configure(int fd)
{
  return ioctl(fd, USB_FUZZER_IOCTL_CONFIGURE, 0);
}

int usb_fuzzer_vbus_draw(int fd, uint32_t power)
{
  return ioctl(fd, USB_FUZZER_IOCTL_VBUS_DRAW, power);
}

#define USB_MAX_PACKET_SIZE 1024

struct usb_fuzzer_control_event {
  struct usb_fuzzer_event inner;
  struct usb_ctrlrequest ctrl;
};

struct usb_fuzzer_ep_io_data {
  struct usb_fuzzer_ep_io inner;
  char data[USB_MAX_PACKET_SIZE];
};

struct vusb_connect_string_descriptor {
  uint32_t len;
  char* str;
} __attribute__((packed));

struct vusb_connect_descriptors {
  uint32_t qual_len;
  char* qual;
  uint32_t bos_len;
  char* bos;
  uint32_t strs_len;
  struct vusb_connect_string_descriptor strs[0];
} __attribute__((packed));

static volatile long syz_usb_connect(volatile long a0, volatile long a1,
                                     volatile long a2, volatile long a3)
{
  int64_t speed = a0;
  int64_t dev_len = a1;
  char* dev = (char*)a2;
  struct vusb_connect_descriptors* conn_descs =
      (struct vusb_connect_descriptors*)a3;
  if (!dev)
    return -1;
  struct usb_device_index index;
  memset(&index, 0, sizeof(index));
  int rv = parse_usb_descriptor(dev, dev_len, &index);
  if (!rv)
    return -1;
  int fd = usb_fuzzer_open();
  if (fd < 0)
    return -1;
  char device[32];
  sprintf(&device[0], "dummy_udc.%llu", procid);
  rv = usb_fuzzer_init(fd, speed, "dummy_udc", &device[0]);
  if (rv < 0)
    return -1;
  rv = usb_fuzzer_run(fd);
  if (rv < 0)
    return -1;
  bool done = false;
  while (!done) {
    char* response_data = NULL;
    uint32_t response_length = 0;
    unsigned ep;
    uint8_t str_idx;
    struct usb_fuzzer_control_event event;
    event.inner.type = 0;
    event.inner.length = sizeof(event.ctrl);
    rv = usb_fuzzer_ep0_read(fd, (struct usb_fuzzer_event*)&event);
    if (rv < 0)
      return -1;
    if (event.inner.type != USB_FUZZER_EVENT_CONTROL)
      continue;
    switch (event.ctrl.bRequestType & USB_TYPE_MASK) {
    case USB_TYPE_STANDARD:
      switch (event.ctrl.bRequest) {
      case USB_REQ_GET_DESCRIPTOR:
        switch (event.ctrl.wValue >> 8) {
        case USB_DT_DEVICE:
          response_data = (char*)index.dev;
          response_length = sizeof(*index.dev);
          goto reply;
        case USB_DT_CONFIG:
          response_data = (char*)index.config;
          response_length = index.config_length;
          goto reply;
        case USB_DT_STRING:
          str_idx = (uint8_t)event.ctrl.wValue;
          if (str_idx >= conn_descs->strs_len)
            goto reply;
          response_data = conn_descs->strs[str_idx].str;
          response_length = conn_descs->strs[str_idx].len;
          goto reply;
        case USB_DT_BOS:
          response_data = conn_descs->bos;
          response_length = conn_descs->bos_len;
          goto reply;
        case USB_DT_DEVICE_QUALIFIER:
          response_data = conn_descs->qual;
          response_length = conn_descs->qual_len;
          goto reply;
        default:
          exit(1);
          continue;
        }
        break;
      case USB_REQ_SET_CONFIGURATION:
        rv = usb_fuzzer_vbus_draw(fd, index.config->bMaxPower);
        if (rv < 0)
          return -1;
        rv = usb_fuzzer_configure(fd);
        if (rv < 0)
          return -1;
        for (ep = 0; ep < index.eps_num; ep++) {
          rv = usb_fuzzer_ep_enable(fd, index.eps[ep]);
          if (rv < 0)
            exit(1);
        }
        done = true;
        goto reply;
      default:
        exit(1);
        continue;
      }
      break;
    default:
      exit(1);
      continue;
    }
    struct usb_fuzzer_ep_io_data response;
  reply:
    response.inner.ep = 0;
    response.inner.flags = 0;
    if (response_length > sizeof(response.data))
      response_length = 0;
    response.inner.length = response_length;
    if (response_data)
      memcpy(&response.data[0], response_data, response_length);
    if (event.ctrl.wLength < response.inner.length)
      response.inner.length = event.ctrl.wLength;
    usb_fuzzer_ep0_write(fd, (struct usb_fuzzer_ep_io*)&response);
  }
  sleep_ms(200);
  return fd;
}

static void setup_common()
{
  if (mount(0, "/sys/fs/fuse/connections", "fusectl", 0, 0)) {
  }
}

static void loop();

static void sandbox_common()
{
  prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
  setpgrp();
  setsid();
  struct rlimit rlim;
  rlim.rlim_cur = rlim.rlim_max = (200 << 20);
  setrlimit(RLIMIT_AS, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 32 << 20;
  setrlimit(RLIMIT_MEMLOCK, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 136 << 20;
  setrlimit(RLIMIT_FSIZE, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 1 << 20;
  setrlimit(RLIMIT_STACK, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 0;
  setrlimit(RLIMIT_CORE, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 256;
  setrlimit(RLIMIT_NOFILE, &rlim);
  if (unshare(CLONE_NEWNS)) {
  }
  if (unshare(CLONE_NEWIPC)) {
  }
  if (unshare(0x02000000)) {
  }
  if (unshare(CLONE_NEWUTS)) {
  }
  if (unshare(CLONE_SYSVSEM)) {
  }
  typedef struct {
    const char* name;
    const char* value;
  } sysctl_t;
  static const sysctl_t sysctls[] = {
      {"/proc/sys/kernel/shmmax", "16777216"},
      {"/proc/sys/kernel/shmall", "536870912"},
      {"/proc/sys/kernel/shmmni", "1024"},
      {"/proc/sys/kernel/msgmax", "8192"},
      {"/proc/sys/kernel/msgmni", "1024"},
      {"/proc/sys/kernel/msgmnb", "1024"},
      {"/proc/sys/kernel/sem", "1024 1048576 500 1024"},
  };
  unsigned i;
  for (i = 0; i < sizeof(sysctls) / sizeof(sysctls[0]); i++)
    write_file(sysctls[i].name, sysctls[i].value);
}

int wait_for_loop(int pid)
{
  if (pid < 0)
    exit(1);
  int status = 0;
  while (waitpid(-1, &status, __WALL) != pid) {
  }
  return WEXITSTATUS(status);
}

static int do_sandbox_none(void)
{
  if (unshare(CLONE_NEWPID)) {
  }
  int pid = fork();
  if (pid != 0)
    return wait_for_loop(pid);
  setup_common();
  sandbox_common();
  if (unshare(CLONE_NEWNET)) {
  }
  initialize_tun();
  loop();
  exit(1);
}

#define SYZ_HAVE_CLOSE_FDS 1
static void close_fds()
{
  int fd;
  for (fd = 3; fd < 30; fd++)
    close(fd);
}

void loop(void)
{
  *(uint8_t*)0x20000800 = 0x12;
  *(uint8_t*)0x20000801 = 1;
  *(uint16_t*)0x20000802 = 0;
  *(uint8_t*)0x20000804 = 0xe9;
  *(uint8_t*)0x20000805 = 0x6f;
  *(uint8_t*)0x20000806 = 0xb8;
  *(uint8_t*)0x20000807 = 8;
  *(uint16_t*)0x20000808 = 0x3923;
  *(uint16_t*)0x2000080a = 0x718a;
  *(uint16_t*)0x2000080c = 0x647;
  *(uint8_t*)0x2000080e = 0;
  *(uint8_t*)0x2000080f = 0;
  *(uint8_t*)0x20000810 = 0;
  *(uint8_t*)0x20000811 = 1;
  *(uint8_t*)0x20000812 = 9;
  *(uint8_t*)0x20000813 = 2;
  *(uint16_t*)0x20000814 = 0x8a;
  *(uint8_t*)0x20000816 = 1;
  *(uint8_t*)0x20000817 = 0;
  *(uint8_t*)0x20000818 = 0x40;
  *(uint8_t*)0x20000819 = 2;
  *(uint8_t*)0x2000081a = 0;
  *(uint8_t*)0x2000081b = 9;
  *(uint8_t*)0x2000081c = 4;
  *(uint8_t*)0x2000081d = 0xe9;
  *(uint8_t*)0x2000081e = 0xfc;
  *(uint8_t*)0x2000081f = 0;
  *(uint8_t*)0x20000820 = 0xed;
  *(uint8_t*)0x20000821 = 0x1e;
  *(uint8_t*)0x20000822 = 0x18;
  *(uint8_t*)0x20000823 = 0;
  *(uint8_t*)0x20000824 = 5;
  *(uint8_t*)0x20000825 = 0x24;
  *(uint8_t*)0x20000826 = 0x15;
  *(uint16_t*)0x20000827 = 0x79b;
  *(uint8_t*)0x20000829 = 5;
  *(uint8_t*)0x2000082a = 0x24;
  *(uint8_t*)0x2000082b = 0x15;
  *(uint16_t*)0x2000082c = 8;
  *(uint8_t*)0x2000082e = 4;
  *(uint8_t*)0x2000082f = 0x24;
  *(uint8_t*)0x20000830 = 2;
  *(uint8_t*)0x20000831 = 2;
  *(uint8_t*)0x20000832 = 0xd;
  *(uint8_t*)0x20000833 = 0x24;
  *(uint8_t*)0x20000834 = 0xf;
  *(uint8_t*)0x20000835 = 6;
  *(uint32_t*)0x20000836 = 8;
  *(uint16_t*)0x2000083a = 0x223;
  *(uint16_t*)0x2000083c = 9;
  *(uint8_t*)0x2000083e = 5;
  *(uint8_t*)0x2000083f = 0x10;
  *(uint8_t*)0x20000840 = 0x24;
  *(uint8_t*)0x20000841 = 7;
  *(uint8_t*)0x20000842 = 7;
  *(uint16_t*)0x20000843 = 4;
  *(uint16_t*)0x20000845 = 5;
  *(uint16_t*)0x20000847 = 5;
  *(uint16_t*)0x20000849 = 7;
  *(uint16_t*)0x2000084b = 0x8ca3;
  *(uint16_t*)0x2000084d = 6;
  *(uint8_t*)0x2000084f = 5;
  *(uint8_t*)0x20000850 = 0x24;
  *(uint8_t*)0x20000851 = 0x15;
  *(uint16_t*)0x20000852 = 3;
  *(uint8_t*)0x20000854 = 0x15;
  *(uint8_t*)0x20000855 = 0x24;
  *(uint8_t*)0x20000856 = 0x12;
  *(uint16_t*)0x20000857 = 0x401;
  memcpy((void*)0x20000859,
         "\xf0\xb5\x6e\x66\x4c\xee\x66\x6f\xbc\xf0\xc6\xbd\x5f\x64\xa4\x1c",
         16);
  *(uint8_t*)0x20000869 = 8;
  *(uint8_t*)0x2000086a = 0x24;
  *(uint8_t*)0x2000086b = 7;
  *(uint8_t*)0x2000086c = 9;
  *(uint16_t*)0x2000086d = 0xff;
  *(uint16_t*)0x2000086f = 0xf15;
  *(uint8_t*)0x20000871 = 0xc;
  *(uint8_t*)0x20000872 = 0x24;
  *(uint8_t*)0x20000873 = 7;
  *(uint8_t*)0x20000874 = 7;
  *(uint16_t*)0x20000875 = 3;
  *(uint16_t*)0x20000877 = 0x7616;
  *(uint16_t*)0x20000879 = 7;
  *(uint16_t*)0x2000087b = 4;
  *(uint8_t*)0x2000087d = 6;
  *(uint8_t*)0x2000087e = 0x24;
  *(uint8_t*)0x2000087f = 0x1a;
  *(uint16_t*)0x20000880 = 0xdb;
  *(uint8_t*)0x20000882 = 0x6d;
  *(uint8_t*)0x20000883 = 0xd;
  *(uint8_t*)0x20000884 = 0x24;
  *(uint8_t*)0x20000885 = 0xf;
  *(uint8_t*)0x20000886 = 1;
  *(uint32_t*)0x20000887 = 2;
  *(uint16_t*)0x2000088b = 4;
  *(uint16_t*)0x2000088d = 2;
  *(uint8_t*)0x2000088f = 3;
  *(uint8_t*)0x20000890 = 7;
  *(uint8_t*)0x20000891 = 0x24;
  *(uint8_t*)0x20000892 = 0x14;
  *(uint16_t*)0x20000893 = 0xf4;
  *(uint16_t*)0x20000895 = 8;
  *(uint8_t*)0x20000897 = 5;
  *(uint8_t*)0x20000898 = 0x24;
  *(uint8_t*)0x20000899 = 0;
  *(uint16_t*)0x2000089a = 2;
  syz_usb_connect(6, 0x9c, 0x20000800, 0);
  close_fds();
}
int main(void)
{
  syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0);
  use_temporary_dir();
  do_sandbox_none();
  return 0;
}