// https://syzkaller.appspot.com/bug?id=001410d947fa7742a85647e596c45661118c7d24
// autogenerated by syzkaller (http://github.com/google/syzkaller)

#define _GNU_SOURCE
#include <endian.h>
#include <errno.h>
#include <linux/futex.h>
#include <pthread.h>
#include <signal.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/prctl.h>
#include <sys/syscall.h>
#include <sys/time.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>

__attribute__((noreturn)) static void doexit(int status)
{
  volatile unsigned i;
  syscall(__NR_exit_group, status);
  for (i = 0;; i++) {
  }
}
#include <errno.h>
#include <stdarg.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>

const int kFailStatus = 67;
const int kRetryStatus = 69;

static void fail(const char* msg, ...)
{
  int e = errno;
  va_list args;
  va_start(args, msg);
  vfprintf(stderr, msg, args);
  va_end(args);
  fprintf(stderr, " (errno %d)\n", e);
  doexit((e == ENOMEM || e == EAGAIN) ? kRetryStatus : kFailStatus);
}

static uint64_t current_time_ms()
{
  struct timespec ts;

  if (clock_gettime(CLOCK_MONOTONIC, &ts))
    fail("clock_gettime failed");
  return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000;
}

static void execute_one();
extern unsigned long long procid;

static void loop()
{
  int iter;
  for (iter = 0;; iter++) {
    int pid = fork();
    if (pid < 0)
      fail("clone failed");
    if (pid == 0) {
      prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
      setpgrp();
      execute_one();
      int fd;
      for (fd = 3; fd < 30; fd++)
        close(fd);
      doexit(0);
    }

    int status = 0;
    uint64_t start = current_time_ms();
    for (;;) {
      int res = waitpid(-1, &status, __WALL | WNOHANG);
      if (res == pid) {
        break;
      }
      usleep(1000);
      if (current_time_ms() - start < 5 * 1000)
        continue;
      kill(-pid, SIGKILL);
      kill(pid, SIGKILL);
      while (waitpid(-1, &status, __WALL) != pid) {
      }
      break;
    }
  }
}

struct thread_t {
  int created, running, call;
  pthread_t th;
};

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 (;;) {
    while (!__atomic_load_n(&th->running, __ATOMIC_ACQUIRE))
      syscall(SYS_futex, &th->running, FUTEX_WAIT, 0, 0);
    execute_call(th->call);
    __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED);
    __atomic_store_n(&th->running, 0, __ATOMIC_RELEASE);
    syscall(SYS_futex, &th->running, FUTEX_WAKE);
  }
  return 0;
}

static void execute(int num_calls)
{
  int call, thread;
  running = 0;
  for (call = 0; call < num_calls; call++) {
    for (thread = 0; thread < sizeof(threads) / sizeof(threads[0]); thread++) {
      struct thread_t* th = &threads[thread];
      if (!th->created) {
        th->created = 1;
        pthread_attr_t attr;
        pthread_attr_init(&attr);
        pthread_attr_setstacksize(&attr, 128 << 10);
        pthread_create(&th->th, &attr, thr, th);
      }
      if (!__atomic_load_n(&th->running, __ATOMIC_ACQUIRE)) {
        th->call = call;
        __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED);
        __atomic_store_n(&th->running, 1, __ATOMIC_RELEASE);
        syscall(SYS_futex, &th->running, FUTEX_WAKE);
        struct timespec ts;
        ts.tv_sec = 0;
        ts.tv_nsec = 20 * 1000 * 1000;
        syscall(SYS_futex, &th->running, FUTEX_WAIT, 1, &ts);
        if (__atomic_load_n(&running, __ATOMIC_RELAXED))
          usleep((call == num_calls - 1) ? 10000 : 1000);
        break;
      }
    }
  }
}

uint64_t r[4] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff,
                 0xffffffffffffffff};
void execute_call(int call)
{
  long res;
  switch (call) {
  case 0:
    memcpy((void*)0x20000080, "/dev/snapshot", 14);
    res = syscall(__NR_openat, 0xffffffffffffff9c, 0x20000080, 0x50200, 0);
    if (res != -1)
      r[0] = res;
    break;
  case 1:
    *(uint32_t*)0x20001540 = 0xdd;
    memcpy((void*)0x20001544,
           "\xa3\x38\x1e\xcd\x74\xfc\x88\x73\xd6\x2e\x13\xdc\xd5\x43\xbd\x39"
           "\xe6\x3b\x47\x53\x10\xae\x26\x5e\xcd\x8f\x57\x5a\x64\x46\x6b\xba"
           "\xa9\x78\xab\xfe\x54\xcd\x69\x55\x11\xf1\x78\x68\xac\xa8\xf0\x42"
           "\xe3\x02\x73\x20\x5d\x32\x17\x4b\xc9\x0e\x8f\xdd\x8c\x43\xd5\x80"
           "\x6f\x67\x82\x16\x83\x7e\xc9\x68\xa2\x30\x42\xf0\x7e\x8d\x78\x23"
           "\xe5\xeb\x05\xa8\x9a\xc7\x7f\xb0\x1b\xc1\xf9\xa4\xd8\xaa\xe3\x01"
           "\xb9\xbc\x38\x55\xb9\x1f\xe8\x19\x06\xe5\xf1\xc1\xb8\xce\x9b\x83"
           "\xd3\x3d\x39\x91\x7c\x95\x4d\x11\xa2\xcb\xf7\x82\x37\x47\x52\xd0"
           "\x40\xc3\x9b\x73\x21\xe7\x92\xd0\x1c\x1a\xb7\x5d\xfb\xa3\xf1\xee"
           "\xca\xeb\xe4\x16\xdb\xef\xa1\xca\xdd\x55\x91\x30\x4c\xc2\x73\xcd"
           "\xc0\x7d\x36\x51\x50\x4e\xcc\x52\x7f\x58\x86\x53\x3e\xe2\x6f\x26"
           "\x3e\x78\xe8\x22\x3a\x6c\xdb\x2a\xfd\x28\xbd\x6c\x1a\x00\xad\xc5"
           "\x80\xe1\x19\x35\xae\xba\x5c\x3b\xfb\xe3\x2c\x43\x18\x55\x76\xf8"
           "\xab\x82\x60\x1d\xfa\xc9\x4a\x8d\xd9\x95\xea\x23\xb8",
           221);
    syscall(__NR_ioctl, r[0], 0x4004ae8b, 0x20001540);
    break;
  case 2:
    res = syscall(__NR_pipe2, 0x20000500, 0);
    if (res != -1) {
      r[1] = *(uint32_t*)0x20000500;
      r[2] = *(uint32_t*)0x20000504;
    }
    break;
  case 3:
    *(uint32_t*)0x20000040 = 0x148;
    *(uint8_t*)0x20000044 = 0x4d;
    *(uint16_t*)0x20000045 = 0;
    syscall(__NR_write, r[2], 0x20000040, 7);
    break;
  case 4:
    memcpy((void*)0x20000140, "./file0", 8);
    syscall(__NR_mkdir, 0x20000140, 0);
    break;
  case 5:
    memcpy((void*)0x200000c0, "./file0", 8);
    memcpy((void*)0x20000340, "9p", 3);
    memcpy((void*)0x200003c0, "trans=fd,", 9);
    memcpy((void*)0x200003c9, "rfdno", 5);
    *(uint8_t*)0x200003ce = 0x3d;
    sprintf((char*)0x200003cf, "0x%016llx", (long long)r[1]);
    *(uint8_t*)0x200003e1 = 0x2c;
    memcpy((void*)0x200003e2, "wfdno", 5);
    *(uint8_t*)0x200003e7 = 0x3d;
    sprintf((char*)0x200003e8, "0x%016llx", (long long)r[2]);
    *(uint8_t*)0x200003fa = 0x2c;
    memcpy((void*)0x200003fb, "version=9p2000.u", 16);
    *(uint8_t*)0x2000040b = 0x2c;
    *(uint8_t*)0x2000040c = 0;
    syscall(__NR_mount, 0, 0x200000c0, 0x20000340, 0, 0x200003c0);
    break;
  case 6:
    res = syscall(__NR_pipe2, 0x20000000, 0x80800);
    if (res != -1)
      r[3] = *(uint32_t*)0x20000000;
    break;
  case 7:
    *(uint8_t*)0x200001c0 = 2;
    *(uint8_t*)0x200001c1 = 1;
    *(uint16_t*)0x200001c2 = 1;
    *(uint16_t*)0x200001c4 = 7;
    *(uint16_t*)0x200001c6 = 7;
    syscall(__NR_ioctl, r[0], 0x5602, 0x200001c0);
    break;
  case 8:
    syscall(__NR_read, r[3], 0x20000540, 0x1000);
    break;
  case 9:
    *(uint32_t*)0x20000480 = 0x2a;
    *(uint8_t*)0x20000484 = 0x29;
    *(uint16_t*)0x20000485 = 1;
    *(uint32_t*)0x20000487 = 0;
    *(uint8_t*)0x2000048b = 0;
    *(uint32_t*)0x2000048c = 0;
    *(uint64_t*)0x20000490 = 0;
    *(uint64_t*)0x20000498 = 0;
    *(uint8_t*)0x200004a0 = 0;
    *(uint16_t*)0x200004a1 = 7;
    memcpy((void*)0x200004a3, "./file0", 7);
    syscall(__NR_write, r[2], 0x20000480, 0x2a);
    break;
  case 10:
    *(uint32_t*)0x20000280 = 0x5b;
    *(uint8_t*)0x20000284 = 0x29;
    *(uint16_t*)0x20000285 = 1;
    *(uint32_t*)0x20000287 = 0;
    *(uint8_t*)0x2000028b = 0;
    *(uint32_t*)0x2000028c = 0;
    *(uint64_t*)0x20000290 = 0;
    *(uint64_t*)0x20000298 = 0;
    *(uint8_t*)0x200002a0 = 0;
    *(uint16_t*)0x200002a1 = 0xd;
    memcpy((void*)0x200002a3, "./file0/file0", 13);
    *(uint8_t*)0x200002b0 = 0;
    *(uint32_t*)0x200002b1 = 0;
    *(uint64_t*)0x200002b5 = 0;
    *(uint64_t*)0x200002bd = 0xfffffffffffffff8;
    *(uint8_t*)0x200002c5 = 0;
    *(uint16_t*)0x200002c6 = 0x13;
    memcpy((void*)0x200002c8, "./file0/file0/file0", 19);
    syscall(__NR_write, r[2], 0x20000280, 0x5b);
    break;
  case 11:
    memcpy((void*)0x20000300, "./file0", 8);
    memcpy((void*)0x20000380, "9p", 3);
    memcpy((void*)0x20000200, "trans=fd,", 9);
    memcpy((void*)0x20000209, "rfdno", 5);
    *(uint8_t*)0x2000020e = 0x3d;
    sprintf((char*)0x2000020f, "0x%016llx", (long long)r[2]);
    *(uint8_t*)0x20000221 = 0x2c;
    memcpy((void*)0x20000222, "wfdno", 5);
    *(uint8_t*)0x20000227 = 0x3d;
    sprintf((char*)0x20000228, "0x%016llx", (long long)r[2]);
    *(uint8_t*)0x2000023a = 0x2c;
    *(uint8_t*)0x2000023b = 0;
    syscall(__NR_mount, 0, 0x20000300, 0x20000380, 0x800000, 0x20000200);
    break;
  case 12:
    memcpy((void*)0x20000100, "./file0", 8);
    memcpy((void*)0x20000180, "osx.", 4);
    memcpy((void*)0x20000184, "version=9p2000.u", 16);
    syscall(__NR_removexattr, 0x20000100, 0x20000180);
    break;
  }
}

void execute_one()
{
  execute(13);
}

int main()
{
  syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0);
  for (;;) {
    loop();
  }
}