// https://syzkaller.appspot.com/bug?id=567efd4eb0f5c89420be5d9a3ecf22cde4c0337e
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <endian.h>
#include <errno.h>
#include <pthread.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/syscall.h>
#include <sys/types.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;
  }
}

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 loop(void)
{
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  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);
      event_timedwait(&th->done, 50);
      break;
    }
  }
  for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++)
    sleep_ms(1);
}

uint64_t r[3] = {0xffffffffffffffff, 0x0, 0x0};

void execute_call(int call)
{
  intptr_t res = 0;
  switch (call) {
  case 0:
    //  mkdirat arguments: [
    //    fd: fd_dir (resource)
    //    path: ptr[in, buffer] {
    //      buffer: {2e 2f 66 69 6c 65 30 00} (length 0x8)
    //    }
    //    mode: open_mode = 0x0 (8 bytes)
    //  ]
    memcpy((void*)0x200000002040, "./file0\000", 8);
    syscall(__NR_mkdirat, /*fd=*/0xffffff9c, /*path=*/0x200000002040ul,
            /*mode=*/0ul);
    break;
  case 1:
    //  openat$fuse arguments: [
    //    fd: const = 0xffffffffffffff9c (8 bytes)
    //    file: ptr[in, buffer] {
    //      buffer: {2f 64 65 76 2f 66 75 73 65 00} (length 0xa)
    //    }
    //    flags: const = 0x42 (4 bytes)
    //    mode: const = 0x0 (2 bytes)
    //  ]
    //  returns fd_fuse
    memcpy((void*)0x2000000005c0, "/dev/fuse\000", 10);
    res = syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul,
                  /*file=*/0x2000000005c0ul, /*flags=*/0x42, /*mode=*/0);
    if (res != -1)
      r[0] = res;
    break;
  case 2:
    //  mount$fuse arguments: [
    //    src: const = 0x0 (8 bytes)
    //    dst: ptr[in, buffer] {
    //      buffer: {2e 2f 66 69 6c 65 30 00} (length 0x8)
    //    }
    //    type: ptr[in, buffer] {
    //      buffer: {66 75 73 65 00} (length 0x5)
    //    }
    //    flags: mount_flags = 0x0 (8 bytes)
    //    opts: ptr[inout, array[ANYUNION]] {
    //      array[ANYUNION] {
    //        union ANYUNION {
    //          ANYBLOB: buffer: {66 64 3d} (length 0x3)
    //        }
    //        union ANYUNION {
    //          ANYRESOCT: ANYRES64 (resource)
    //        }
    //        union ANYUNION {
    //          ANYBLOB: buffer: {2c 72 6f 6f 74 6d 6f 64 65 3d 30 30 30 30 30
    //          30 30 30 30 30 30 30 30 30 30 30 30 34 30 30 30 30 2c 75 73 65
    //          72 5f 69 64 3d} (length 0x29)
    //        }
    //        union ANYUNION {
    //          ANYRESDEC: ANYRES64 (resource)
    //        }
    //        union ANYUNION {
    //          ANYBLOB: buffer: {2c 67 72 6f 75 70 5f 69 64 3d} (length 0xa)
    //        }
    //        union ANYUNION {
    //          ANYRESDEC: ANYRES64 (resource)
    //        }
    //      }
    //    }
    //  ]
    memcpy((void*)0x200000000000, "./file0\000", 8);
    memcpy((void*)0x200000002100, "fuse\000", 5);
    memcpy((void*)0x200000000080, "fd=", 3);
    sprintf((char*)0x200000000083, "%023llo", (long long)r[0]);
    memcpy((void*)0x20000000009a,
           ",rootmode=0000000000000000040000,user_id=", 41);
    sprintf((char*)0x2000000000c3, "%020llu", (long long)0);
    memcpy((void*)0x2000000000d7, ",group_id=", 10);
    sprintf((char*)0x2000000000e1, "%020llu", (long long)0);
    syscall(__NR_mount, /*src=*/0ul, /*dst=*/0x200000000000ul,
            /*type=*/0x200000002100ul, /*flags=*/0ul,
            /*opts=*/0x200000000080ul);
    break;
  case 3:
    //  rmdir arguments: [
    //    path: ptr[in, buffer] {
    //      buffer: {2e 2f 66 69 6c 65 30 2f 2e 2e 2f 66 69 6c 65 30 2f 66 69 6c
    //      65 30 00} (length 0x17)
    //    }
    //  ]
    memcpy((void*)0x200000000040, "./file0/../file0/file0\000", 23);
    syscall(__NR_rmdir, /*path=*/0x200000000040ul);
    break;
  case 4:
    //  read$FUSE arguments: [
    //    fd: fd_fuse (resource)
    //    buf: ptr[out, fuse_in[read_buffer]] {
    //      fuse_in[read_buffer] {
    //        len: len = 0x2020 (4 bytes)
    //        opcode: int32 = 0x0 (4 bytes)
    //        unique: fuse_unique (resource)
    //        uid: uid (resource)
    //        gid: gid (resource)
    //        pid: pid (resource)
    //        padding: int32 = 0x0 (4 bytes)
    //        payload: buffer: (DirOut)
    //      }
    //    }
    //    len: bytesize = 0x2020 (8 bytes)
    //  ]
    res = syscall(__NR_read, /*fd=*/r[0], /*buf=*/0x20000000e280ul,
                  /*len=*/0x2020ul);
    if (res != -1)
      r[1] = *(uint64_t*)0x20000000e288;
    break;
  case 5:
    //  write$FUSE_INIT arguments: [
    //    fd: fd_fuse (resource)
    //    arg: ptr[in, fuse_out_t[fuse_unique, fuse_init_out]] {
    //      fuse_out_t[fuse_unique, fuse_init_out] {
    //        len: len = 0x50 (4 bytes)
    //        err: fuse_errors = 0x0 (4 bytes)
    //        unique: fuse_unique (resource)
    //        payload: fuse_init_out {
    //          major: const = 0x7 (4 bytes)
    //          minor: const = 0x2d (4 bytes)
    //          max_readahead: int32 = 0x0 (4 bytes)
    //          flags: fuse_init_flags = 0x0 (4 bytes)
    //          max_background: int16 = 0x0 (2 bytes)
    //          congestion_threshold: int16 = 0x0 (2 bytes)
    //          max_write: int32 = 0x0 (4 bytes)
    //          time_gran: int32 = 0x0 (4 bytes)
    //          max_pages: const = 0x0 (2 bytes)
    //          map_alignment: const = 0x0 (2 bytes)
    //          flags2: fuse_init_flags2 = 0x0 (4 bytes)
    //          max_stack_depth: int32 = 0x0 (4 bytes)
    //          unused: buffer: {00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    //          00 00 00 00 00 00 00 00} (length 0x18)
    //        }
    //      }
    //    }
    //    len: bytesize = 0x50 (8 bytes)
    //  ]
    *(uint32_t*)0x200000000100 = 0x50;
    *(uint32_t*)0x200000000104 = 0;
    *(uint64_t*)0x200000000108 = r[1];
    *(uint32_t*)0x200000000110 = 7;
    *(uint32_t*)0x200000000114 = 0x2d;
    *(uint32_t*)0x200000000118 = 0;
    *(uint32_t*)0x20000000011c = 0;
    *(uint16_t*)0x200000000120 = 0;
    *(uint16_t*)0x200000000122 = 0;
    *(uint32_t*)0x200000000124 = 0;
    *(uint32_t*)0x200000000128 = 0;
    *(uint16_t*)0x20000000012c = 0;
    *(uint16_t*)0x20000000012e = 0;
    *(uint32_t*)0x200000000130 = 0;
    *(uint32_t*)0x200000000134 = 0;
    memset((void*)0x200000000138, 0, 24);
    syscall(__NR_write, /*fd=*/r[0], /*arg=*/0x200000000100ul, /*len=*/0x50ul);
    break;
  case 6:
    //  read$FUSE arguments: [
    //    fd: fd_fuse (resource)
    //    buf: ptr[out, fuse_in[read_buffer]] {
    //      fuse_in[read_buffer] {
    //        len: len = 0x2020 (4 bytes)
    //        opcode: int32 = 0x0 (4 bytes)
    //        unique: fuse_unique (resource)
    //        uid: uid (resource)
    //        gid: gid (resource)
    //        pid: pid (resource)
    //        padding: int32 = 0x0 (4 bytes)
    //        payload: buffer: (DirOut)
    //      }
    //    }
    //    len: bytesize = 0x2020 (8 bytes)
    //  ]
    res = syscall(__NR_read, /*fd=*/r[0], /*buf=*/0x200000004140ul,
                  /*len=*/0x2020ul);
    if (res != -1)
      r[2] = *(uint64_t*)0x200000004148;
    break;
  case 7:
    //  write$FUSE_DIRENT arguments: [
    //    fd: fd_fuse (resource)
    //    arg: ptr[in, fuse_out_t[fuse_unique, array[fuse_dirent]]] {
    //      fuse_out_t[fuse_unique, array[fuse_dirent]] {
    //        len: len = 0xa0 (4 bytes)
    //        err: fuse_errors = 0x0 (4 bytes)
    //        unique: fuse_unique (resource)
    //        payload: array[fuse_dirent] {
    //          fuse_dirent {
    //            ino: int64 = 0x4 (8 bytes)
    //            off: int64 = 0xa0 (8 bytes)
    //            namelen: len = 0xe (4 bytes)
    //            type: int32 = 0x8 (4 bytes)
    //            name: buffer: {2a 2d 26 2d 3f 2b 5c 2c 21 2a 23 24 2d 27}
    //            (length 0xe)
    //          }
    //          fuse_dirent {
    //            ino: int64 = 0x0 (8 bytes)
    //            off: int64 = 0x7 (8 bytes)
    //            namelen: len = 0x5 (4 bytes)
    //            type: int32 = 0x7 (4 bytes)
    //            name: buffer: {66 75 73 65 00} (length 0x5)
    //          }
    //          fuse_dirent {
    //            ino: int64 = 0x0 (8 bytes)
    //            off: int64 = 0xf9cd (8 bytes)
    //            namelen: len = 0x5 (4 bytes)
    //            type: int32 = 0x0 (4 bytes)
    //            name: buffer: {66 75 73 65 00} (length 0x5)
    //          }
    //          fuse_dirent {
    //            ino: int64 = 0x3 (8 bytes)
    //            off: int64 = 0xffffffffffff7fff (8 bytes)
    //            namelen: len = 0xa (4 bytes)
    //            type: int32 = 0xee18 (4 bytes)
    //            name: buffer: {2f 64 65 76 2f 66 75 73 65 00} (length 0xa)
    //          }
    //        }
    //      }
    //    }
    //    len: bytesize = 0xa0 (8 bytes)
    //  ]
    *(uint32_t*)0x200000000180 = 0xa0;
    *(uint32_t*)0x200000000184 = 0;
    *(uint64_t*)0x200000000188 = r[2];
    *(uint64_t*)0x200000000190 = 4;
    *(uint64_t*)0x200000000198 = 0xa0;
    *(uint32_t*)0x2000000001a0 = 0xe;
    *(uint32_t*)0x2000000001a4 = 8;
    memcpy((void*)0x2000000001a8, "*-&-?+\\,!*#$-\'", 14);
    *(uint64_t*)0x2000000001b8 = 0;
    *(uint64_t*)0x2000000001c0 = 7;
    *(uint32_t*)0x2000000001c8 = 5;
    *(uint32_t*)0x2000000001cc = 7;
    memcpy((void*)0x2000000001d0, "fuse\000", 5);
    *(uint64_t*)0x2000000001d8 = 0;
    *(uint64_t*)0x2000000001e0 = 0xf9cd;
    *(uint32_t*)0x2000000001e8 = 5;
    *(uint32_t*)0x2000000001ec = 0;
    memcpy((void*)0x2000000001f0, "fuse\000", 5);
    *(uint64_t*)0x2000000001f8 = 3;
    *(uint64_t*)0x200000000200 = 0xffffffffffff7fff;
    *(uint32_t*)0x200000000208 = 0xa;
    *(uint32_t*)0x20000000020c = 0xee18;
    memcpy((void*)0x200000000210, "/dev/fuse\000", 10);
    syscall(__NR_write, /*fd=*/r[0], /*arg=*/0x200000000180ul, /*len=*/0xa0ul);
    break;
  }
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffffffff000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x200000000000ul, /*len=*/0x1000000ul,
          /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x200001000000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  const char* reason;
  (void)reason;
  loop();
  return 0;
}