// https://syzkaller.appspot.com/bug?id=3f8223543fd6664e2d0bffdb9a270e10588c1bd8
// 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 <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/prctl.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>

#ifndef __NR_bpf
#define __NR_bpf 321
#endif

static unsigned long long procid;

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);
  int i = 0;
  for (; i < 100; i++) {
    if (pthread_create(&th, &attr, fn, arg) == 0) {
      pthread_attr_destroy(&attr);
      return;
    }
    if (errno == EAGAIN) {
      usleep(50);
      continue;
    }
    break;
  }
  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))))

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 | FUTEX_PRIVATE_FLAG, 1000000);
}

static void event_wait(event_t* ev)
{
  while (!__atomic_load_n(&ev->state, __ATOMIC_ACQUIRE))
    syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 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 | FUTEX_PRIVATE_FLAG, 0, &ts);
    if (__atomic_load_n(&ev->state, __ATOMIC_ACQUIRE))
      return 1;
    now = current_time_ms();
    if (now - start > timeout)
      return 0;
  }
}

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

static void setup_test()
{
  prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
  setpgrp();
  write_file("/proc/self/oom_score_adj", "1000");
}

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;
  for (call = 0; call < 9; 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);
      event_timedwait(&th->done, 50 + (call == 8 ? 500 : 0));
      break;
    }
  }
  for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++)
    sleep_ms(1);
}

static void execute_one(void);

#define WAIT_FLAGS __WALL

static void loop(void)
{
  int iter = 0;
  for (;; iter++) {
    int pid = fork();
    if (pid < 0)
      exit(1);
    if (pid == 0) {
      setup_test();
      execute_one();
      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 < 5000)
        continue;
      kill_and_wait(pid, &status);
      break;
    }
  }
}

uint64_t r[2] = {0xffffffffffffffff, 0x0};

void execute_call(int call)
{
  intptr_t res = 0;
  switch (call) {
  case 0:
    syscall(__NR_socket, 0x1dul, 5ul, 0);
    break;
  case 1:
    *(uint32_t*)0x20005980 = 0xa;
    *(uint32_t*)0x20005984 = 9;
    *(uint32_t*)0x20005988 = 0x3e0a;
    *(uint32_t*)0x2000598c = 0x200;
    *(uint32_t*)0x20005990 = 0;
    *(uint32_t*)0x20005994 = -1;
    *(uint32_t*)0x20005998 = 0;
    memset((void*)0x2000599c, 0, 16);
    *(uint32_t*)0x200059ac = 0;
    *(uint32_t*)0x200059b0 = -1;
    *(uint32_t*)0x200059b4 = 0;
    *(uint32_t*)0x200059b8 = 0;
    *(uint32_t*)0x200059bc = 0;
    *(uint64_t*)0x200059c0 = 0;
    syscall(__NR_bpf, 0ul, 0x20005980ul, 0x48ul);
    break;
  case 2:
    syscall(__NR_ioctl, -1, 0x8933, 0ul);
    break;
  case 3:
    res = syscall(__NR_socket, 0x10ul, 3ul, 0x10);
    if (res != -1)
      r[0] = res;
    break;
  case 4:
    res = syscall(__NR_getpid);
    if (res != -1)
      r[1] = res;
    break;
  case 5:
    *(uint64_t*)0x20000100 = 0;
    *(uint32_t*)0x20000108 = 0;
    *(uint64_t*)0x20000110 = 0x20000500;
    *(uint64_t*)0x20000500 = 0x20000200;
    *(uint32_t*)0x20000200 = 0x1c;
    *(uint16_t*)0x20000204 = 0x28;
    *(uint16_t*)0x20000206 = 1;
    *(uint32_t*)0x20000208 = 0;
    *(uint32_t*)0x2000020c = 0;
    *(uint16_t*)0x20000210 = 4;
    STORE_BY_BITMASK(uint16_t, , 0x20000212, 0, 0, 14);
    STORE_BY_BITMASK(uint16_t, , 0x20000213, 0, 6, 1);
    STORE_BY_BITMASK(uint16_t, , 0x20000213, 1, 7, 1);
    *(uint16_t*)0x20000214 = 8;
    STORE_BY_BITMASK(uint16_t, , 0x20000216, 9, 0, 14);
    STORE_BY_BITMASK(uint16_t, , 0x20000217, 0, 6, 1);
    STORE_BY_BITMASK(uint16_t, , 0x20000217, 0, 7, 1);
    *(uint32_t*)0x20000218 = r[1];
    *(uint64_t*)0x20000508 = 0x1c;
    *(uint64_t*)0x20000118 = 1;
    *(uint64_t*)0x20000120 = 0;
    *(uint64_t*)0x20000128 = 0;
    *(uint32_t*)0x20000130 = 0;
    syscall(__NR_sendmsg, r[0], 0x20000100ul, 0ul);
    break;
  case 6:
    *(uint32_t*)0x20002f80 = 0;
    syscall(__NR_accept4, -1, 0ul, 0x20002f80ul, 0x80800ul);
    break;
  case 7:
    *(uint32_t*)0x20000440 = 0x11;
    *(uint32_t*)0x20000444 = 6;
    *(uint64_t*)0x20000448 = 0x20000240;
    memcpy(
        (void*)0x20000240,
        "\x05\x00\x00\x00\x00\x00\x00\x00\x61\x11\x0c\x00\x00\x00\x00\x00\x85"
        "\x10\x00\x00\x02\x00\x00\x00\x85\x00\x00\x00\x05\x00\x00\x00\x95\x00"
        "\x00\x00\x00\x00\x00\x00\x95\x00\xa5\x05\x00\x00\x00\x00\x77\x51\xe8"
        "\xba\x63\x9a\x67\x88\x9a\x41\xcc\xa5\x55\xfe\xdb\xe9\xd8\xf3\xb4\x23"
        "\xcd\xac\xfa\x7e\x32\xfe\x02\x31\x36\x8b\x22\x6c\xf9\xdc\x3f\x54\x45"
        "\xf9\xf6\x55\x15\xb0\xe1\xa3\x8d\x86\x65\x52\x2b\xe1\x8b\xd1\x0a\x48"
        "\xb0\x43\xcc\xc4\x26\x46\xd2\x5d\xfd\x73\xa0\x15\xe0\xca\x7f\xc2\x50"
        "\x6a\x0f\x68\xa7\xd0\x6d\x75\x35\xf7\x86\x69\x07\xdc\x67\x51\xdf\xb2"
        "\x65\xa0\xe3\xcc\xae\x66\x9e\x17\x3a\x64\x9c\x1c\xfd\x65\x87\xd4\x52"
        "\xd6\x4e\x7c\xc9\x57\xd7\x75\x78\xf4\xc3\x52\x35\x13\x8d\x55\x21\xf9"
        "\x45\x35\x59\xc3\x5d\xa8\x60\xe8\xef\xbc\x2f\x2b\xa4\xb5\x58\xa1\x96"
        "\x77\x1c\xfe\xec\x79\xc6\x6c\x54\xc3\xb8\x5a\xec\xe5\x95\x2f\xda\x68"
        "\xff\x54\x31\x03\xc0\xdb\x55\x8b\xbf\xae\x58\x80\x43\x51\xc6\xce\x40"
        "\xf8\x13\xc6\x55\x7c\xcd\x80\xc6\x16\x0e\x44\x15\xe2\x52\x65\x12\xa0"
        "\x2d\xc8\xef\xf8\x62\x0a\x48\x22\x3c\x94\x94\x33\x4d\x45\x4f\x17\xee"
        "\x3f\x35\xb6\xbb\x97\xaf\x27\xd8\x1d\xe3\x89\x2e\xd3\xae\x12\xc1\x75"
        "\x48\x5c\xd5\x30\xab\xb7\x3c\x62\xdb\x33\x97\x01\xd6\x54\x7c",
        287);
    *(uint64_t*)0x20000450 = 0;
    *(uint32_t*)0x20000458 = 5;
    *(uint32_t*)0x2000045c = 0;
    *(uint64_t*)0x20000460 = 0;
    *(uint32_t*)0x20000468 = 0;
    *(uint32_t*)0x2000046c = 0;
    memset((void*)0x20000470, 0, 16);
    *(uint32_t*)0x20000480 = 0;
    *(uint32_t*)0x20000484 = 0;
    *(uint32_t*)0x20000488 = -1;
    *(uint32_t*)0x2000048c = 6;
    *(uint64_t*)0x20000490 = 0;
    *(uint32_t*)0x20000498 = 0;
    *(uint32_t*)0x2000049c = 0x10;
    *(uint64_t*)0x200004a0 = 0;
    *(uint32_t*)0x200004a8 = 0;
    *(uint32_t*)0x200004ac = 0;
    *(uint32_t*)0x200004b0 = -1;
    *(uint32_t*)0x200004b4 = 0;
    *(uint64_t*)0x200004b8 = 0;
    syscall(__NR_bpf, 5ul, 0x20000440ul, 0x80ul);
    break;
  case 8:
    *(uint32_t*)0x20000200 = 0x18;
    *(uint32_t*)0x20000204 = 7;
    *(uint64_t*)0x20000208 = 0;
    *(uint64_t*)0x20000210 = 0;
    *(uint32_t*)0x20000218 = 0x6f7;
    *(uint32_t*)0x2000021c = 0x17;
    *(uint64_t*)0x20000220 = 0x20000080;
    *(uint32_t*)0x20000228 = 0x41000;
    *(uint32_t*)0x2000022c = 2;
    memset((void*)0x20000230, 0, 16);
    *(uint32_t*)0x20000240 = 0;
    *(uint32_t*)0x20000244 = 0;
    *(uint32_t*)0x20000248 = -1;
    *(uint32_t*)0x2000024c = 8;
    *(uint64_t*)0x20000250 = 0;
    *(uint32_t*)0x20000258 = 0;
    *(uint32_t*)0x2000025c = 0x10;
    *(uint64_t*)0x20000260 = 0;
    *(uint32_t*)0x20000268 = 0;
    *(uint32_t*)0x2000026c = 0;
    *(uint32_t*)0x20000270 = 0;
    *(uint32_t*)0x20000274 = 0;
    *(uint64_t*)0x20000278 = 0;
    syscall(__NR_bpf, 5ul, 0x20000200ul, 0x80ul);
    break;
  }
}
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);
  for (procid = 0; procid < 6; procid++) {
    if (fork() == 0) {
      loop();
    }
  }
  sleep(1000000);
  return 0;
}