// https://syzkaller.appspot.com/bug?id=ab27002b46d19cafb1ebb8b040f0a3b0f8f88974
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

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

#include <linux/futex.h>
#include <linux/genetlink.h>
#include <linux/netlink.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;
}

static void thread_start(void* (*fn)(void*), void* arg)
{
  pthread_t th;
  pthread_attr_t attr;
  pthread_attr_init(&attr);
  pthread_attr_setstacksize(&attr, 128 << 10);
  if (pthread_create(&th, &attr, fn, arg))
    exit(1);
  pthread_attr_destroy(&attr);
}

#define BITMASK_LEN(type, bf_len) (type)((1ull << (bf_len)) - 1)

#define BITMASK_LEN_OFF(type, bf_off, bf_len)                                  \
  (type)(BITMASK_LEN(type, (bf_len)) << (bf_off))

#define STORE_BY_BITMASK(type, addr, val, bf_off, bf_len)                      \
  if ((bf_off) == 0 && (bf_len) == 0) {                                        \
    *(type*)(addr) = (type)(val);                                              \
  } else {                                                                     \
    type new_val = *(type*)(addr);                                             \
    new_val &= ~BITMASK_LEN_OFF(type, (bf_off), (bf_len));                     \
    new_val |= ((type)(val)&BITMASK_LEN(type, (bf_len))) << (bf_off);          \
    *(type*)(addr) = new_val;                                                  \
  }

typedef struct {
  int state;
} event_t;

static void event_init(event_t* ev)
{
  ev->state = 0;
}

static void event_reset(event_t* ev)
{
  ev->state = 0;
}

static void event_set(event_t* ev)
{
  if (ev->state)
    exit(1);
  __atomic_store_n(&ev->state, 1, __ATOMIC_RELEASE);
  syscall(SYS_futex, &ev->state, FUTEX_WAKE);
}

static void event_wait(event_t* ev)
{
  while (!__atomic_load_n(&ev->state, __ATOMIC_ACQUIRE))
    syscall(SYS_futex, &ev->state, FUTEX_WAIT, 0, 0);
}

static int event_isset(event_t* ev)
{
  return __atomic_load_n(&ev->state, __ATOMIC_ACQUIRE);
}

static int event_timedwait(event_t* ev, uint64_t timeout)
{
  uint64_t start = current_time_ms();
  uint64_t now = start;
  for (;;) {
    uint64_t remain = timeout - (now - start);
    struct timespec ts;
    ts.tv_sec = remain / 1000;
    ts.tv_nsec = (remain % 1000) * 1000 * 1000;
    syscall(SYS_futex, &ev->state, FUTEX_WAIT, 0, &ts);
    if (__atomic_load_n(&ev->state, __ATOMIC_RELAXED))
      return 1;
    now = current_time_ms();
    if (now - start > timeout)
      return 0;
  }
}

static long syz_open_procfs(long a0, long a1)
{
  char buf[128];
  memset(buf, 0, sizeof(buf));
  if (a0 == 0) {
    snprintf(buf, sizeof(buf), "/proc/self/%s", (char*)a1);
  } else if (a0 == -1) {
    snprintf(buf, sizeof(buf), "/proc/thread-self/%s", (char*)a1);
  } else {
    snprintf(buf, sizeof(buf), "/proc/self/task/%d/%s", (int)a0, (char*)a1);
  }
  int fd = open(buf, O_RDWR);
  if (fd == -1)
    fd = open(buf, O_RDONLY);
  return fd;
}

static long syz_genetlink_get_family_id(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;
}

static void kill_and_wait(int pid, int* status)
{
  kill(-pid, SIGKILL);
  kill(pid, SIGKILL);
  int i;
  for (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) {
  }
}

#define SYZ_HAVE_SETUP_TEST 1
static void setup_test()
{
  prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
  setpgrp();
}

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

struct thread_t {
  int created, call;
  event_t ready, done;
};

static struct thread_t threads[16];
static void execute_call(int call);
static int running;

static void* thr(void* arg)
{
  struct thread_t* th = (struct thread_t*)arg;
  for (;;) {
    event_wait(&th->ready);
    event_reset(&th->ready);
    execute_call(th->call);
    __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED);
    event_set(&th->done);
  }
  return 0;
}

static void execute_one(void)
{
  int i, call, thread;
  int collide = 0;
again:
  for (call = 0; call < 16; call++) {
    for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0]));
         thread++) {
      struct thread_t* th = &threads[thread];
      if (!th->created) {
        th->created = 1;
        event_init(&th->ready);
        event_init(&th->done);
        event_set(&th->done);
        thread_start(thr, th);
      }
      if (!event_isset(&th->done))
        continue;
      event_reset(&th->done);
      th->call = call;
      __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED);
      event_set(&th->ready);
      if (collide && (call % 2) == 0)
        break;
      event_timedwait(&th->done, 45);
      break;
    }
  }
  for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++)
    sleep_ms(1);
  if (!collide) {
    collide = 1;
    goto again;
  }
}

static void execute_one(void);

#define WAIT_FLAGS __WALL

static void loop(void)
{
  int iter;
  for (iter = 0;; iter++) {
    int pid = fork();
    if (pid < 0)
      exit(1);
    if (pid == 0) {
      setup_test();
      execute_one();
      reset_test();
      exit(0);
    }
    int status = 0;
    uint64_t start = current_time_ms();
    for (;;) {
      if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid)
        break;
      sleep_ms(1);
      if (current_time_ms() - start < 5 * 1000)
        continue;
      kill_and_wait(pid, &status);
      break;
    }
  }
}
#ifndef __NR_sched_setattr
#define __NR_sched_setattr 314
#endif

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

void execute_call(int call)
{
  long res;
  switch (call) {
  case 0:
    *(uint32_t*)0x2001d000 = 1;
    *(uint32_t*)0x2001d004 = 0x70;
    *(uint8_t*)0x2001d008 = 0;
    *(uint8_t*)0x2001d009 = 0;
    *(uint8_t*)0x2001d00a = 0;
    *(uint8_t*)0x2001d00b = 0;
    *(uint32_t*)0x2001d00c = 0;
    *(uint64_t*)0x2001d010 = 0x7f;
    *(uint64_t*)0x2001d018 = 0;
    *(uint64_t*)0x2001d020 = 0;
    STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 0, 1);
    STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 1, 1);
    STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 2, 1);
    STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 3, 1);
    STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 4, 1);
    STORE_BY_BITMASK(uint64_t, 0x2001d028, 0x81, 5, 1);
    STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 6, 1);
    STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 7, 1);
    STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 8, 1);
    STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 9, 1);
    STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 10, 1);
    STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 11, 1);
    STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 12, 1);
    STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 13, 1);
    STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 14, 1);
    STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 15, 2);
    STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 17, 1);
    STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 18, 1);
    STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 19, 1);
    STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 20, 1);
    STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 21, 1);
    STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 22, 1);
    STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 23, 1);
    STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 24, 1);
    STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 25, 1);
    STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 26, 1);
    STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 27, 1);
    STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 28, 1);
    STORE_BY_BITMASK(uint64_t, 0x2001d028, 0, 29, 35);
    *(uint32_t*)0x2001d030 = 0;
    *(uint32_t*)0x2001d034 = 0x20000;
    *(uint64_t*)0x2001d038 = 0x20abe000;
    *(uint64_t*)0x2001d040 = 0;
    *(uint64_t*)0x2001d048 = 0;
    *(uint64_t*)0x2001d050 = 0;
    *(uint32_t*)0x2001d058 = 0;
    *(uint32_t*)0x2001d05c = 0;
    *(uint64_t*)0x2001d060 = 0;
    *(uint32_t*)0x2001d068 = 0;
    *(uint16_t*)0x2001d06c = 0;
    *(uint16_t*)0x2001d06e = 0;
    res = syscall(__NR_perf_event_open, 0x2001d000, 0, -1, -1, 0);
    if (res != -1)
      r[0] = res;
    break;
  case 1:
    *(uint32_t*)0x20000000 = 0;
    *(uint32_t*)0x20000004 = 6;
    *(uint64_t*)0x20000008 = 0;
    *(uint32_t*)0x20000010 = 0;
    *(uint32_t*)0x20000014 = 0;
    *(uint64_t*)0x20000018 = 0x9917;
    *(uint64_t*)0x20000020 = 0xffff;
    *(uint64_t*)0x20000028 = 0;
    syscall(__NR_sched_setattr, 0, 0x20000000, 0);
    break;
  case 2:
    syscall(__NR_ioctl, -1, 0x4c81, 0);
    break;
  case 3:
    memcpy((void*)0x20000640, "syzkaller", 10);
    *(uint8_t*)0x20000680 = 0x73;
    *(uint8_t*)0x20000681 = 0x79;
    *(uint8_t*)0x20000682 = 0x7a;
    *(uint8_t*)0x20000683 = 0x23;
    *(uint8_t*)0x20000684 = 0;
    memcpy((void*)0x200006c0, "", 1);
    res = syscall(__NR_request_key, 0x20000640, 0x20000680, 0x200006c0,
                  0xfffffff9);
    if (res != -1)
      r[1] = res;
    break;
  case 4:
    memcpy((void*)0x20000140, "user", 5);
    *(uint8_t*)0x20000800 = 0x73;
    *(uint8_t*)0x20000801 = 0x79;
    *(uint8_t*)0x20000802 = 0x7a;
    *(uint8_t*)0x20000803 = 0x20;
    *(uint8_t*)0x20000804 = 0;
    syscall(__NR_add_key, 0x20000140, 0x20000800, 0x20000700, 0, r[1]);
    break;
  case 5:
    *(uint32_t*)0x20000200 = 0xe8;
    syscall(__NR_getsockopt, -1, 0, 0x10, 0x20000840, 0x20000200);
    break;
  case 6:
    memcpy((void*)0x20000380, "task", 5);
    syz_open_procfs(0, 0x20000380);
    break;
  case 7:
    syscall(__NR_keyctl, 0xf, 0, 0);
    break;
  case 8:
    res = syscall(__NR_ioctl, -1, 0x540f, 0x200001c0);
    if (res != -1)
      r[2] = *(uint32_t*)0x200001c0;
    break;
  case 9:
    memcpy((void*)0x20000500, "IPVS", 5);
    syz_genetlink_get_family_id(0x20000500);
    break;
  case 10:
    *(uint64_t*)0x20000180 = 0;
    *(uint32_t*)0x20000188 = 2;
    *(uint32_t*)0x2000018c = 1;
    syscall(__NR_ioctl, -1, 0x401070c9, 0x20000180);
    break;
  case 11:
    memcpy((void*)0x200002c0, "./file0", 8);
    syscall(__NR_umount2, 0x200002c0, 0);
    break;
  case 12:
    syscall(__NR_ioctl, -1, 0x8040451a, 0x200003c0);
    break;
  case 13:
    *(uint32_t*)0x20000400 = 3;
    syscall(__NR_setsockopt, -1, 0x11, 0x64, 0x20000400, 4);
    break;
  case 14:
    syscall(__NR_write, -1, 0x20000280, 0);
    break;
  case 15:
    *(uint32_t*)0x20000080 = 0;
    *(uint32_t*)0x20000084 = 0x70;
    *(uint8_t*)0x20000088 = 3;
    *(uint8_t*)0x20000089 = 7;
    *(uint8_t*)0x2000008a = 1;
    *(uint8_t*)0x2000008b = 8;
    *(uint32_t*)0x2000008c = 0;
    *(uint64_t*)0x20000090 = 2;
    *(uint64_t*)0x20000098 = 0;
    *(uint64_t*)0x200000a0 = 0;
    STORE_BY_BITMASK(uint64_t, 0x200000a8, 0xfffffffffffffffa, 0, 1);
    STORE_BY_BITMASK(uint64_t, 0x200000a8, 0xa3, 1, 1);
    STORE_BY_BITMASK(uint64_t, 0x200000a8, 0x86f, 2, 1);
    STORE_BY_BITMASK(uint64_t, 0x200000a8, 0x20, 3, 1);
    STORE_BY_BITMASK(uint64_t, 0x200000a8, 0, 4, 1);
    STORE_BY_BITMASK(uint64_t, 0x200000a8, 0, 5, 1);
    STORE_BY_BITMASK(uint64_t, 0x200000a8, 2, 6, 1);
    STORE_BY_BITMASK(uint64_t, 0x200000a8, 5, 7, 1);
    STORE_BY_BITMASK(uint64_t, 0x200000a8, 0x4355, 8, 1);
    STORE_BY_BITMASK(uint64_t, 0x200000a8, 0, 9, 1);
    STORE_BY_BITMASK(uint64_t, 0x200000a8, 0x800, 10, 1);
    STORE_BY_BITMASK(uint64_t, 0x200000a8, 0, 11, 1);
    STORE_BY_BITMASK(uint64_t, 0x200000a8, 0, 12, 1);
    STORE_BY_BITMASK(uint64_t, 0x200000a8, 5, 13, 1);
    STORE_BY_BITMASK(uint64_t, 0x200000a8, 0xff, 14, 1);
    STORE_BY_BITMASK(uint64_t, 0x200000a8, 1, 15, 2);
    STORE_BY_BITMASK(uint64_t, 0x200000a8, 0x400, 17, 1);
    STORE_BY_BITMASK(uint64_t, 0x200000a8, 2, 18, 1);
    STORE_BY_BITMASK(uint64_t, 0x200000a8, 0xfffffffffffffff9, 19, 1);
    STORE_BY_BITMASK(uint64_t, 0x200000a8, 0x8001, 20, 1);
    STORE_BY_BITMASK(uint64_t, 0x200000a8, 4, 21, 1);
    STORE_BY_BITMASK(uint64_t, 0x200000a8, 0x9f8, 22, 1);
    STORE_BY_BITMASK(uint64_t, 0x200000a8, 0, 23, 1);
    STORE_BY_BITMASK(uint64_t, 0x200000a8, 2, 24, 1);
    STORE_BY_BITMASK(uint64_t, 0x200000a8, 3, 25, 1);
    STORE_BY_BITMASK(uint64_t, 0x200000a8, 0xe3f0, 26, 1);
    STORE_BY_BITMASK(uint64_t, 0x200000a8, 0x8000, 27, 1);
    STORE_BY_BITMASK(uint64_t, 0x200000a8, 6, 28, 1);
    STORE_BY_BITMASK(uint64_t, 0x200000a8, 0, 29, 35);
    *(uint32_t*)0x200000b0 = 0;
    *(uint32_t*)0x200000b4 = 3;
    *(uint64_t*)0x200000b8 = 0x20000040;
    *(uint64_t*)0x200000c0 = 2;
    *(uint64_t*)0x200000c8 = 0;
    *(uint64_t*)0x200000d0 = 0;
    *(uint32_t*)0x200000d8 = 0x1f;
    *(uint32_t*)0x200000dc = 0;
    *(uint64_t*)0x200000e0 = 0xff;
    *(uint32_t*)0x200000e8 = 6;
    *(uint16_t*)0x200000ec = 7;
    *(uint16_t*)0x200000ee = 0;
    syscall(__NR_perf_event_open, 0x20000080, r[2], 0, r[0], 8);
    break;
  }
}
int main(void)
{
  syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0);
  loop();
  return 0;
}