// https://syzkaller.appspot.com/bug?id=f35281f65a6c33ca898b72786b2d5f722037a506
// 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>

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);
}

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 < 8; 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 (call == 5 || call == 7)
        break;
      event_timedwait(&th->done, 50);
      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, 0xffffffffffffffff};

void execute_call(int call)
{
  intptr_t res = 0;
  switch (call) {
  case 0:
    res = syscall(__NR_socket, 0xaul, 6ul, 0);
    if (res != -1)
      r[0] = res;
    break;
  case 1:
    *(uint16_t*)0x20000040 = 0xa;
    *(uint16_t*)0x20000042 = htobe16(0x4e20);
    *(uint32_t*)0x20000044 = htobe32(0);
    memset((void*)0x20000048, 0, 16);
    *(uint32_t*)0x20000058 = 0;
    syscall(__NR_bind, r[0], 0x20000040ul, 0x1cul);
    break;
  case 2:
    res = syscall(__NR_socket, 2ul, 6ul, 0);
    if (res != -1)
      r[1] = res;
    break;
  case 3:
    syscall(__NR_listen, r[0], 6);
    break;
  case 4:
    memset((void*)0x201c9fff, 3, 1);
    syscall(__NR_setsockopt, r[1], 0x10d, 0xd, 0x201c9ffful, 1ul);
    break;
  case 5:
    *(uint64_t*)0x20006440 = 0;
    *(uint32_t*)0x20006448 = 0;
    *(uint64_t*)0x20006450 = 0x200000c0;
    *(uint64_t*)0x200000c0 = 0x20000400;
    memcpy(
        (void*)0x20000400,
        "\xe1\xaf\x1f\x36\x99\xc7\x8e\x61\xd5\x3b\x80\x7c\xb2\xe2\xd7\x59\xfd"
        "\xc3\xe0\x44\x2e\x0c\x25\x6d\x07\xb4\xd5\xd8\x98\x25\x78\x87\xaf\xcf"
        "\xb8\xc2\xc7\x03\xd8\xf9\x55\x0b\x6a\x52\x1c\x97\x3b\xac\x4e\x57\xb7"
        "\xf0\xee\x57\x6d\x8c\xd1\xe0\xb1\xbf\x53\xc6\x20\xc0\xa2\x81\xde\x57"
        "\xba\xe0\x83\xd0\xdd\xec\x53\xae\xc2\xc0\xf1\xe5\xaa\x00\x28\x79\xfc"
        "\x60\x62\x20\x8a\xb4\xb8\xe2\x4b\x00\x2c\xf1\xc6\x7e\x06\x55\x33\x3e"
        "\x90\x6b\x39\x15\x9b\x29\x0e\x59\x4c\xdf\x8d\x05\x9c\x23\xda\xec\xbf"
        "\x4d\xc7\x1a\x7e\x5d\xeb\x88\x9d\xd7\xad\x50\xa0\x92\xe3\xad\x6a\x72"
        "\x3e\xb3\x95\x87\x78\xb8\x54\xaa\x5d\x6d\xff\xfd\x9f\x78\xac\xf6\x1f"
        "\xc6\x16\x3f\x29\xe9\xab\x2d\xa4\x1a\x53\xf3\xc5\xf9\xdc\xad\xbc\x6a"
        "\x01\xe1\x66\x84\xd1\x63\x86\xe9\x94\x7a\x1a\xd6\xee\x5c\x3b\x43\x87"
        "\x14\x71\x93\x0b\x31\x90",
        193);
    *(uint64_t*)0x200000c8 = 0xc1;
    *(uint64_t*)0x200000d0 = 0;
    *(uint64_t*)0x200000d8 = 0;
    *(uint64_t*)0x200000e0 = 0;
    *(uint64_t*)0x200000e8 = 0;
    *(uint64_t*)0x200000f0 = 0;
    *(uint64_t*)0x200000f8 = 0;
    *(uint64_t*)0x20006458 = 4;
    *(uint64_t*)0x20006460 = 0;
    *(uint64_t*)0x20006468 = 0;
    *(uint32_t*)0x20006470 = 0;
    *(uint32_t*)0x20006478 = 0;
    *(uint64_t*)0x20006480 = 0;
    *(uint32_t*)0x20006488 = 0;
    *(uint64_t*)0x20006490 = 0;
    *(uint64_t*)0x20006498 = 0;
    *(uint64_t*)0x200064a0 = 0x20000b00;
    *(uint64_t*)0x20000b00 = 0x10;
    *(uint32_t*)0x20000b08 = 0x105;
    *(uint32_t*)0x20000b0c = 0xd0;
    *(uint64_t*)0x20000b10 = 0x10;
    *(uint32_t*)0x20000b18 = 0x116;
    *(uint32_t*)0x20000b1c = 0xf5;
    *(uint64_t*)0x20000b20 = 0x10;
    *(uint32_t*)0x20000b28 = 0x3a;
    *(uint32_t*)0x20000b2c = 0x7ff;
    *(uint64_t*)0x20000b30 = 0x10;
    *(uint32_t*)0x20000b38 = 0x104;
    *(uint32_t*)0x20000b3c = 3;
    *(uint64_t*)0x20000b40 = 0x10;
    *(uint32_t*)0x20000b48 = 0x11d;
    *(uint32_t*)0x20000b4c = 0x1ff;
    *(uint64_t*)0x20000b50 = 0x10;
    *(uint32_t*)0x20000b58 = 0x29;
    *(uint32_t*)0x20000b5c = 0;
    *(uint64_t*)0x20000b60 = 0x10;
    *(uint32_t*)0x20000b68 = 0x119;
    *(uint32_t*)0x20000b6c = 8;
    *(uint64_t*)0x20000b70 = 0x10;
    *(uint32_t*)0x20000b78 = 0x10b;
    *(uint32_t*)0x20000b7c = 5;
    *(uint64_t*)0x200064a8 = 0x80;
    *(uint32_t*)0x200064b0 = 0;
    *(uint32_t*)0x200064b8 = 0;
    *(uint64_t*)0x200064c0 = 0;
    *(uint32_t*)0x200064c8 = 0;
    *(uint64_t*)0x200064d0 = 0;
    *(uint64_t*)0x200064d8 = 0;
    *(uint64_t*)0x200064e0 = 0;
    *(uint64_t*)0x200064e8 = 0;
    *(uint32_t*)0x200064f0 = 0;
    *(uint32_t*)0x200064f8 = 0;
    *(uint64_t*)0x20006500 = 0;
    *(uint32_t*)0x20006508 = 0;
    *(uint64_t*)0x20006510 = 0;
    *(uint64_t*)0x20006518 = 0;
    *(uint64_t*)0x20006520 = 0;
    *(uint64_t*)0x20006528 = 0;
    *(uint32_t*)0x20006530 = 0;
    *(uint32_t*)0x20006538 = 0;
    *(uint64_t*)0x20006540 = 0;
    *(uint32_t*)0x20006548 = 0;
    *(uint64_t*)0x20006550 = 0;
    *(uint64_t*)0x20006558 = 0;
    *(uint64_t*)0x20006560 = 0;
    *(uint64_t*)0x20006568 = 0;
    *(uint32_t*)0x20006570 = 0;
    *(uint32_t*)0x20006578 = 0;
    *(uint64_t*)0x20006580 = 0;
    *(uint32_t*)0x20006588 = 0;
    *(uint64_t*)0x20006590 = 0;
    *(uint64_t*)0x20006598 = 0;
    *(uint64_t*)0x200065a0 = 0;
    *(uint64_t*)0x200065a8 = 0;
    *(uint32_t*)0x200065b0 = 0;
    *(uint32_t*)0x200065b8 = 0;
    *(uint64_t*)0x200065c0 = 0;
    *(uint32_t*)0x200065c8 = 0;
    *(uint64_t*)0x200065d0 = 0;
    *(uint64_t*)0x200065d8 = 0;
    *(uint64_t*)0x200065e0 = 0;
    *(uint64_t*)0x200065e8 = 0;
    *(uint32_t*)0x200065f0 = 0;
    *(uint32_t*)0x200065f8 = 0;
    syscall(__NR_sendmmsg, r[1], 0x20006440ul, 7ul, 0x20000891ul);
    {
      int i;
      for (i = 0; i < 64; i++) {
        syscall(__NR_sendmmsg, r[1], 0x20006440ul, 7ul, 0x20000891ul);
      }
    }
    break;
  case 6:
    *(uint16_t*)0x20e5c000 = 2;
    *(uint16_t*)0x20e5c002 = htobe16(0x4e20);
    *(uint32_t*)0x20e5c004 = htobe32(0);
    syscall(__NR_connect, r[1], 0x20e5c000ul, 0x10ul);
    break;
  case 7:
    *(uint64_t*)0x20000ac0 = 0;
    *(uint32_t*)0x20000ac8 = 0x5d;
    *(uint64_t*)0x20000ad0 = 0x20000180;
    *(uint64_t*)0x20000180 = 0x20000880;
    memset((void*)0x20000880, 84, 1);
    *(uint64_t*)0x20000188 = 1;
    *(uint64_t*)0x20000ad8 = 5;
    *(uint64_t*)0x20000ae0 = 0;
    *(uint64_t*)0x20000ae8 = 0;
    *(uint32_t*)0x20000af0 = 0;
    *(uint32_t*)0x20000af8 = 0;
    syscall(__NR_sendmmsg, r[1], 0x20000ac0ul, 0x503ul, 0ul);
    {
      int i;
      for (i = 0; i < 64; i++) {
        syscall(__NR_sendmmsg, r[1], 0x20000ac0ul, 0x503ul, 0ul);
      }
    }
    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);
  loop();
  return 0;
}