// https://syzkaller.appspot.com/bug?id=7d3ae3514bf9a76edadf2da36fb388a70e37a3d0
// 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/stat.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>

#include <linux/futex.h>

unsigned long long procid;

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

static uint64_t current_time_ms()
{
  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);
}

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 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()
{
  int i, call, thread;
  int collide = 0;
again:
  for (call = 0; call < 6; call++) {
    for (thread = 0; thread < 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();

#define WAIT_FLAGS __WALL

static void loop()
{
  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_bpf
#define __NR_bpf 321
#endif

uint64_t r[1] = {0xffffffffffffffff};

void execute_call(int call)
{
  long res;
  switch (call) {
  case 0:
    *(uint32_t*)0x20000000 = 0;
    *(uint32_t*)0x20000004 = 2;
    *(uint64_t*)0x20000008 = 0x20001000;
    memcpy((void*)0x20001000, "\x7b\x1a\xf8\xf7\x00\x89\xe7\x11\x48\xc9\x3f\x67"
                              "\x1a\x4e\xe9\x01\x00\x20\x69\xa2\x90\xff",
           22);
    *(uint64_t*)0x20000010 = 0x20000100;
    memcpy((void*)0x20000100, "GPL", 4);
    *(uint32_t*)0x20000018 = 0;
    *(uint32_t*)0x2000001c = 0;
    *(uint64_t*)0x20000020 = 0;
    *(uint32_t*)0x20000028 = 0;
    *(uint32_t*)0x2000002c = 0;
    *(uint8_t*)0x20000030 = 0;
    *(uint8_t*)0x20000031 = 0;
    *(uint8_t*)0x20000032 = 0;
    *(uint8_t*)0x20000033 = 0;
    *(uint8_t*)0x20000034 = 0;
    *(uint8_t*)0x20000035 = 0;
    *(uint8_t*)0x20000036 = 0;
    *(uint8_t*)0x20000037 = 0;
    *(uint8_t*)0x20000038 = 0;
    *(uint8_t*)0x20000039 = 0;
    *(uint8_t*)0x2000003a = 0;
    *(uint8_t*)0x2000003b = 0;
    *(uint8_t*)0x2000003c = 0;
    *(uint8_t*)0x2000003d = 0;
    *(uint8_t*)0x2000003e = 0;
    *(uint8_t*)0x2000003f = 0;
    *(uint32_t*)0x20000040 = 0;
    *(uint32_t*)0x20000044 = 0;
    syscall(__NR_bpf, 5, 0x20000000, 0x48);
    break;
  case 1:
    *(uint32_t*)0x20001000 = 0x10000;
    *(uint32_t*)0x20001004 = 4;
    *(uint32_t*)0x20001008 = 0x100;
    *(uint32_t*)0x2000100c = 0x400;
    syscall(__NR_setsockopt, -1, 0x84, 0, 0x20001000, 6);
    break;
  case 2:
    res = syscall(__NR_socket, 0x11, 0x80002, 0);
    if (res != -1)
      r[0] = res;
    break;
  case 3:
    *(uint32_t*)0x20788000 = 2;
    syscall(__NR_setsockopt, r[0], 0x107, 0xa, 0x20788000, 4);
    break;
  case 4:
    *(uint16_t*)0x20000480 = 0x11;
    *(uint16_t*)0x20000482 = htobe16(3);
    *(uint32_t*)0x20000484 = 0;
    *(uint16_t*)0x20000488 = 1;
    *(uint8_t*)0x2000048a = 0;
    *(uint8_t*)0x2000048b = 6;
    *(uint8_t*)0x2000048c = 0xaa;
    *(uint8_t*)0x2000048d = 0xaa;
    *(uint8_t*)0x2000048e = 0xaa;
    *(uint8_t*)0x2000048f = 0xaa;
    *(uint8_t*)0x20000490 = 0xaa;
    *(uint8_t*)0x20000491 = 0xaa;
    *(uint8_t*)0x20000492 = 0;
    *(uint8_t*)0x20000493 = 0;
    syscall(__NR_bind, r[0], 0x20000480, 0x14);
    break;
  case 5:
    syscall(__NR_setsockopt, r[0], 0x107, 5, 0x20001000, 0xc5);
    break;
  }
}
int main()
{
  syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0);
  for (procid = 0; procid < 8; procid++) {
    if (fork() == 0) {
      loop();
    }
  }
  sleep(1000000);
  return 0;
}