// https://syzkaller.appspot.com/bug?id=6bc10ea4dbeaeb8f98dc45e67cb3586a8aacef1c
// 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;
  int collide = 0;
again:
  for (call = 0; call < 7; 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, 50);
      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 = 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;
    }
  }
}

#ifndef __NR_bpf
#define __NR_bpf 321
#endif

uint64_t r[4] = {0xffffffffffffffff, 0x0, 0xffffffffffffffff,
                 0xffffffffffffffff};

void execute_call(int call)
{
  intptr_t res = 0;
  switch (call) {
  case 0:
    res = syscall(__NR_socket, 0x11ul, 0x800000003ul, 0);
    if (res != -1)
      r[0] = res;
    break;
  case 1:
    *(uint16_t*)0x20000080 = 0x11;
    memcpy((void*)0x20000082,
           "\x00\x00\x01\x00\x00\x00\x00\x00\x08\x00\x44\x94\x4e\xeb\xa7\x1a"
           "\x49\x76\xe2\x52\x92\x2c\xb1\x8f\x6e\x2e\x2a\xba\x00\x00\x00\x01"
           "\x2e\x0b\x38\x36\x00\x54\x04\xb0\xe0\x30\x1a\x4c\xe8\x75\xf2\xe3"
           "\xff\x5f\x16\x3e\xe3\x40\xb7\x67\x95\x00\x80\x00\x00\x00\x00\x00"
           "\x00\x01\x01\x01\x3c\x58\x11\x03\x9e\x15\x77\x50\x27\xec\xce\x66"
           "\xfd\x79\x2b\xbf\x0e\x5b\xf5\xff\x1b\x08\x16\xf3\xf6\xdb\x1c\x00"
           "\x01\x00\x00\x00\x00\x00\x00\x00\x49\x74\x00\x00\x00\x00\x00\x00"
           "\x00\x06\xad\x8e\x5e\xcc\x32\x6d\x3a\x09\xff\xc2\xc6\x54",
           126);
    syscall(__NR_bind, r[0], 0x20000080ul, 0x80ul);
    break;
  case 2:
    *(uint32_t*)0x20000000 = 0x14;
    res = syscall(__NR_getsockname, r[0], 0x200003c0ul, 0x20000000ul);
    if (res != -1)
      r[1] = *(uint32_t*)0x200003c4;
    break;
  case 3:
    res = syscall(__NR_socket, 0x10ul, 3ul, 0);
    if (res != -1)
      r[2] = res;
    break;
  case 4:
    *(uint64_t*)0x20000040 = 0;
    *(uint32_t*)0x20000048 = 0;
    *(uint64_t*)0x20000050 = 0x20000780;
    *(uint64_t*)0x20000780 = 0x20000140;
    *(uint32_t*)0x20000140 = 0x40;
    *(uint16_t*)0x20000144 = 0x24;
    *(uint16_t*)0x20000146 = 0xf0b;
    *(uint32_t*)0x20000148 = 0;
    *(uint32_t*)0x2000014c = -1;
    *(uint8_t*)0x20000150 = 0;
    *(uint8_t*)0x20000151 = 0;
    *(uint16_t*)0x20000152 = 0;
    *(uint32_t*)0x20000154 = r[1];
    *(uint16_t*)0x20000158 = 0;
    *(uint16_t*)0x2000015a = 0;
    *(uint16_t*)0x2000015c = -1;
    *(uint16_t*)0x2000015e = -1;
    *(uint16_t*)0x20000160 = 0;
    *(uint16_t*)0x20000162 = 0;
    *(uint16_t*)0x20000164 = 0xd;
    *(uint16_t*)0x20000166 = 1;
    memcpy((void*)0x20000168, "fq_codel\000", 9);
    *(uint16_t*)0x20000174 = 0xc;
    *(uint16_t*)0x20000176 = 2;
    *(uint16_t*)0x20000178 = 8;
    *(uint16_t*)0x2000017a = 2;
    *(uint32_t*)0x2000017c = 0;
    *(uint64_t*)0x20000788 = 0x40;
    *(uint64_t*)0x20000058 = 1;
    *(uint64_t*)0x20000060 = 0;
    *(uint64_t*)0x20000068 = 0;
    *(uint32_t*)0x20000070 = 0;
    syscall(__NR_sendmsg, r[2], 0x20000040ul, 0ul);
    break;
  case 5:
    *(uint32_t*)0x20000200 = 0xc;
    *(uint32_t*)0x20000204 = 0xe;
    *(uint64_t*)0x20000208 = 0x20000380;
    memcpy(
        (void*)0x20000380,
        "\xb7\x02\x00\x00\x01\x00\x00\x00\xbf\xa3\x00\x00\x00\x00\x00\x00\x07"
        "\x03\x00\x00\x00\xfe\xff\xff\x7a\x0a\xf0\xff\xf8\xff\xff\xff\x79\xa4"
        "\xf0\xff\x00\x00\x00\x00\xb7\x06\x00\x00\xff\xff\xff\xff\x2d\x64\x05"
        "\x00\x00\x00\x00\x00\x65\x04\x04\x00\x01\x00\x00\x00\x04\x04\x00\x00"
        "\x01\x00\x7d\x60\xb7\x03\x00\x00\x00\x00\x00\x00\x6a\x0a\x00\xfe\x00"
        "\x00\x00\x00\x85\x00\x00\x00\x0d\x00\x00\x00\xb7\x00\x00\x00\x00\x00"
        "\x00\x00\x95\x00\x00\x00\x00\x00\x00\x00\xe3\xa3\x33\xa0\xda\xf2\xf7"
        "\x34\x51\xc0\xe1\x7a\x60\x6f\xec\x68\xcb\x7d\x67\x51\x4f\xe6\x00\x77"
        "\xd4\xdd\x90\x12\x3d\x27\xe7\xcf\x43\x54\x8e\xe8\x58\x57\xad\x4a\x77"
        "\xcb\x56\xe0\xfc\xb3\xdf\xd4\xe7\x0e\xbe\xc6\x77\xd6\xac\x14\xd2\xc7"
        "\x94\xf7\x2c\xbf\x5f\xe3\x17\x89\xe7\x02\x27\xbf\xd8\x11\x5e\xfd\x90"
        "\xc8\xc4\x82\x58\xf8\xdb\xe8\x2e\x16\xcf\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x03\x79\x0a\xe2\xfd\x45\xd5\x4b\x10\x7c\x8c\x8a\x14\x19\x5e\x32"
        "\xf1\x37\x99\xd6\x70\x74\x32\xff\x48\xbc\x08\x57\x60\x31\x41\x66\x44"
        "\x3c\xe7\x2c\x74\xf3\xdb\x89\x0e\x1f\xf1\x5a\x10\xd9\x1f\x27\xe9\xa2"
        "\x32\xfe\x22\x38\xff\xf8\x67\xba\x8f\xd4\x1b\x29\xca\xad\x2a\x98\x6e"
        "\x0e\x24\x4b\xd1\x17\x47\xff\xda\x1a\x86\x9d\xb7\xe6\x32\xdf\x4d\xe8"
        "\x57\x23\x44\xb4\x19\xc4\x5c\x21\x70\xfe\x87\x36\x92\xd8\x25\x51\x70"
        "\xc1\x68\x22\xbd\xff\xd3\x13\x54\x80\xda\xe9\x3c\x7e\x33\xbd\xef\x00"
        "\x00\x00\x00\xd8\xfd\x8c\x79\xa5\xd0\x96\x7a\xb7\xe4\x36\x86\xb4\xd1"
        "\xe0\x3e\x32\x6b\xee\xa7\x90\x5e\xf7\xde\x37\x5e\xf8\xbc\x81\x43\xdf"
        "\x20\xd1\x3c\x37\xdb\x26\x99\x71\x21\x0f\xab\x70\x71\xcc\x30\x94\x07"
        "\x8a\x04\x47\x77\xaa\xb9\xd8\x00\x00\x0a\xfe\xfd\x7b\x72\xa0\x95\x0d"
        "\x38\x9b\xc9\xcb\x43\xaa\x60\x7b\x72\x69\x56\x1d\xd5\x0b\x22\xbd\x24"
        "\x91\x33\x18\x18\xa1\x0f\x2a\xc8\xc3\x24\x95\x82\xa2\x0d\x4e\x04\xfd"
        "\x1a\xb7\x88\x3f\x65\x6b\x84\x13\x7d\x5f\x7a\x6e\xdb\xa8\x6a\x7b\x9a"
        "\x4c\x2f\x3b\x3a\x8a\xbf\x93\xb2\x80\xea\x53\xce\x01\xdc\xc2\xd3\x0f"
        "\x43\x10\xe8\x28\x1b\x1c\x17\xb5\x0c\xd3\xef\xba\x43\x2c\xd5\xa6\xc8"
        "\x96\xd9\x0c\xdc\x01\x7f\x97\x59\x06\x0e\xa8\x8a\x2f\x65\x97\xe9\x66"
        "\xa8\x5c\x9a\x74\xca\x19\x67\x00\x21\x8f\x91\x97\x46\xbb\x4b\x84\xc1"
        "\x6f\xd5\x6e\x3d\x54\x81\xb3\xd7\x5a\xb7\x61\x3b\x64\x4b\xa7\x58\x0b"
        "\x2a\x09\x42\x39\x4e\xd1\x73\x75\x17\xee\xd1\xc8\x92\x42\x2f\x54\xd5"
        "\xa2\xe1\xcf\x1a\x60\xfe\x2d\xcc\x1a\x46\x5a\xa8\xd5\x4c\xb4\x00\x00"
        "\x53\xc3\xf0\x1e\xa7\x14\xa7\xbd\x4f\xad\x61\x5f\xf6\xe2\x99\x15\x89"
        "\xbb\xdd\x1a\xe0\xd1\xbc\xe6\x5c\x62\x0c\x4a\x25\x27\xa8\x2a\xfe\x16"
        "\xe0\x19\xa5\xe0\xb5\xec\x1b\x1b\x8a\xaf\xba\x09\x00\x00\xc3\x63\x04"
        "\x88\xed\xcc\x4a\x8c\xbd\x32\x46\xe9\x62\xb7\x73\xa7\x5b\x28\xa5\x1c"
        "\xd0\x9c\xbc\xb3\x57\x7f\xea\x6f\x1e\x9f\xe8\xcd\x2b\x53\x2c\x08\x4c"
        "\xbd\x05\x1b\x4a\xea\xf0\xe7\x81\x33\x54\xf1\x4a\x45\x3b\x09\x39\x48"
        "\xd4\x9b\xca\x31\xa7\x17\x04\x19\xbb\x1d\x32\xf2\x56\xff\x30\x10\xe6"
        "\x9b\x2f\x04\x82\xc6\x3a\xb7\x8a\x74\xde\xc8\xb1\x9c\xa7\x6e\x7f\xdf"
        "\x29\x76\x6d\x96\xe4\xc2\xf5\x7b\xa9\x17\xf0\xab\xd5\x25\x3e\x87\xfb"
        "\xe5\xb8\x6a\x4b\x91\x51\xc3\x16\xdf\x39\x25\xd8\x68\x99\xab\x3e\x20"
        "\x36\xf4\x86\x6e\x27\x7d\x82\x82\x91\x65\x92\x2f\x8a\xeb\x4e\xa2\xb9"
        "\xdb\x2d\xbb\x6a\x6b\x15\x7d\x40\x19\x54\x5e\x00\x02\x8d\x09\x60\x8e"
        "\xf2\xe1\x86\xfd\x21\x6c\xe8\x4d\x91\x38\x13\xe1\xbe\x50\xf5\xb6\xb9"
        "\x8d\x5d\xab\x01\x80\x00\x00\x00\x00\x00\x00\xf4\x1c\x29\xb5\x50\xf4"
        "\x5d\x68\xa6\x27\xdb\x83\x35\xfd\x97\xbd\x63\x36\x94\xeb\xb6\x17\x3d"
        "\x94\x74\xc5\x0c\x03\x60\xda\xa3\x87\xba\x5d\xa3\xe0\x92\x46\x3a\x4c"
        "\x08\xf2\xc6\x86\xca\x2a\xb5\xf8\xc6\x23\x53\xb8\xf2\xc8\x17\x00\x00"
        "\x00\x00\x29\x7c\x81\x61\xe5\xc9\x39\x85\x52\x71\xfe\x95\xdf\x69\x0f"
        "\x65\x8d\xa3\x81\x53\x64\x6e\x66\x0e\x9b\xa2\x12\x98\x6c\xd3\x62\x8a"
        "\x50\x0d\x14\xd3\x78\xd4\xaf\x50\x8f\x42\x8e\xcb\x0e\x85\x32\x2f\x9f"
        "\xd3\x17\xb2\x9e\xc2\x3b\x19\x3b\x1d\xed\x28\x24\xdc\x90\xee\xea\x4c"
        "\x56\xa6\x76\xe9\xd6\x46\x25\xcd\xc2\x66\x60\x9d\x2f\x9e\x6b\x92\x5c"
        "\xc4\x13\xcd\xe5\x41\x48\x69\x38\x7f\x23\xa3\x09\xfe\x29\xc7\xe6\x31"
        "\x01\xfe\xc3\x4b\x22\xaa\xe7\x7b\xd5\xdf\x5f\x61\x81\xf5\xb4\x63\x91"
        "\x19\xfc\x54\x46\x89\x34\x79\xe7\x90\x7e\x2e\xed\xfd\x72\x89\x63\x66"
        "\x2f\x80\x29\x92\x6a\x7f\xee\xef\x66\xc6\xf9\x69\xb1\x86\xf5\xd5\xe6"
        "\x7d\xcb\x4e\x24\xd4\x84\x8d\xe6\xa0\x7a\xb8\x85\x45\x09\xe1\x9c\xe4"
        "\x26\x68\x05\xd3\x4f\x1a\xad\xee\x9f\x42\x74\x87\x31\xc7\x42\x15\xa2"
        "\x00\x9e\xe2\x76\x93",
        1059);
    *(uint64_t*)0x20000210 = 0x20000340;
    memcpy((void*)0x20000340, "syzkaller\000", 10);
    *(uint32_t*)0x20000218 = 0;
    *(uint32_t*)0x2000021c = 0;
    *(uint64_t*)0x20000220 = 0;
    *(uint32_t*)0x20000228 = 0;
    *(uint32_t*)0x2000022c = 0;
    *(uint8_t*)0x20000230 = 0;
    *(uint8_t*)0x20000231 = 0;
    *(uint8_t*)0x20000232 = 0;
    *(uint8_t*)0x20000233 = 0;
    *(uint8_t*)0x20000234 = 0;
    *(uint8_t*)0x20000235 = 0;
    *(uint8_t*)0x20000236 = 0;
    *(uint8_t*)0x20000237 = 0;
    *(uint8_t*)0x20000238 = 0;
    *(uint8_t*)0x20000239 = 0;
    *(uint8_t*)0x2000023a = 0;
    *(uint8_t*)0x2000023b = 0;
    *(uint8_t*)0x2000023c = 0;
    *(uint8_t*)0x2000023d = 0;
    *(uint8_t*)0x2000023e = 0;
    *(uint8_t*)0x2000023f = 0;
    *(uint32_t*)0x20000240 = 0;
    *(uint32_t*)0x20000244 = 0;
    *(uint32_t*)0x20000248 = -1;
    *(uint32_t*)0x2000024c = 8;
    *(uint64_t*)0x20000250 = 0x20000000;
    *(uint32_t*)0x20000000 = 0;
    *(uint32_t*)0x20000004 = 0;
    *(uint32_t*)0x20000258 = 0x24f;
    *(uint32_t*)0x2000025c = 0x10;
    *(uint64_t*)0x20000260 = 0x20000000;
    *(uint32_t*)0x20000000 = 0;
    *(uint32_t*)0x20000004 = 0;
    *(uint32_t*)0x20000008 = 0;
    *(uint32_t*)0x2000000c = 0;
    *(uint32_t*)0x20000268 = 0;
    *(uint32_t*)0x2000026c = 0;
    *(uint32_t*)0x20000270 = -1;
    res = syscall(__NR_bpf, 5ul, 0x20000200ul, 0x48ul);
    if (res != -1)
      r[3] = res;
    break;
  case 6:
    *(uint32_t*)0x20000140 = r[3];
    *(uint32_t*)0x20000144 = 0x60;
    *(uint32_t*)0x20000148 = 0xe;
    *(uint32_t*)0x2000014c = 0;
    *(uint64_t*)0x20000150 = 0x20000100;
    memcpy((void*)0x20000100,
           "\x28\x0e\x00\x3f\x43\x05\x60\x7e\x5b\xc5\x79\x5e\x65\x58", 14);
    *(uint64_t*)0x20000158 = 0;
    *(uint32_t*)0x20000160 = 0x100;
    *(uint32_t*)0x20000164 = 0xf2ffffff;
    *(uint32_t*)0x20000168 = 0;
    *(uint32_t*)0x2000016c = 0;
    *(uint64_t*)0x20000170 = 0;
    *(uint64_t*)0x20000178 = 0;
    *(uint32_t*)0x20000180 = 0;
    *(uint32_t*)0x20000184 = 0;
    syscall(__NR_bpf, 0xaul, 0x20000140ul, 0x48ul);
    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;
}