// https://syzkaller.appspot.com/bug?id=a64ff46f998b10b8a7af2af109474608858a1c87
// 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/mount.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <time.h>
#include <unistd.h>

#include <linux/futex.h>

#ifndef __NR_bpf
#define __NR_bpf 321
#endif

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 < 9; 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[2] = {0xffffffffffffffff, 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 73 79 73 00} (length 0x6)
    //    }
    //    mode: open_mode = 0x1ff (8 bytes)
    //  ]
    memcpy((void*)0x200000000000, "./sys\000", 6);
    syscall(
        __NR_mkdirat, /*fd=*/0xffffff9c, /*path=*/0x200000000000ul,
        /*mode=S_IXOTH|S_IWOTH|S_IROTH|S_IXGRP|S_IWGRP|S_IRGRP|S_IXUSR|S_IWUSR|0x100*/
        0x1fful);
    break;
  case 1:
    //  mount arguments: [
    //    src: nil
    //    dst: ptr[in, buffer] {
    //      buffer: {2e 2f 73 79 73 00} (length 0x6)
    //    }
    //    type: ptr[in, buffer] {
    //      buffer: {73 79 73 66 73 00} (length 0x6)
    //    }
    //    flags: mount_flags = 0x0 (8 bytes)
    //    data: nil
    //  ]
    memcpy((void*)0x200000000040, "./sys\000", 6);
    memcpy((void*)0x200000000080, "sysfs\000", 6);
    syscall(__NR_mount, /*src=*/0ul, /*dst=*/0x200000000040ul,
            /*type=*/0x200000000080ul, /*flags=*/0ul, /*data=*/0ul);
    break;
  case 2:
    //  openat arguments: [
    //    fd: fd_dir (resource)
    //    file: ptr[in, buffer] {
    //      buffer: {2e 2f 73 79 73 2f 62 75 73 2f 70 6c 61 74 66 6f 72 6d 2f 64
    //      72 69 76 65 72 73 2f 76 68 63 69 5f 68 63 64 2f 75 6e 62 69 6e 64
    //      00} (length 0x2b)
    //    }
    //    flags: open_flags = 0x1 (4 bytes)
    //    mode: open_mode = 0x0 (2 bytes)
    //  ]
    //  returns fd
    memcpy((void*)0x2000000000c0,
           "./sys/bus/platform/drivers/vhci_hcd/unbind\000", 43);
    res = syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x2000000000c0ul,
                  /*flags=O_WRONLY*/ 1, /*mode=*/0);
    if (res != -1)
      r[0] = res;
    break;
  case 3:
    //  write arguments: [
    //    fd: fd (resource)
    //    buf: ptr[in, buffer] {
    //      buffer: {76 68 63 69 5f 68 63 64 2e 30 00} (length 0xb)
    //    }
    //    count: len = 0xa (8 bytes)
    //  ]
    memcpy((void*)0x200000000100, "vhci_hcd.0\000", 11);
    syscall(__NR_write, /*fd=*/r[0], /*buf=*/0x200000000100ul, /*count=*/0xaul);
    break;
  case 4:
    //  bpf$PROG_LOAD arguments: [
    //    cmd: const = 0x5 (8 bytes)
    //    arg: ptr[in, bpf_prog_t[flags[bpf_prog_type, int32],
    //    bpf_prog_attach_types, bpf_btf_id[opt], fd_bpf_prog[opt]]] {
    //      bpf_prog_t[flags[bpf_prog_type, int32], bpf_prog_attach_types,
    //      bpf_btf_id[opt], fd_bpf_prog[opt]] {
    //        type: bpf_prog_type = 0x10 (4 bytes)
    //        ninsn: bytesize8 = 0x4 (4 bytes)
    //        insns: ptr[inout, array[ANYUNION]] {
    //          array[ANYUNION] {
    //            union ANYUNION {
    //              ANYBLOB: buffer: {b4 00 00 00 00 00 00 00 79 10 48 00 00 00
    //              00 00 61 04 00 00 00 00 00 00 95 00 00 72} (length 0x1c)
    //            }
    //          }
    //        }
    //        license: nil
    //        loglev: int32 = 0x2 (4 bytes)
    //        logsize: len = 0xc3 (4 bytes)
    //        log: ptr[out, buffer] {
    //          buffer: (DirOut)
    //        }
    //        kern_version: bpf_kern_version = 0x0 (4 bytes)
    //        flags: bpf_prog_load_flags = 0x0 (4 bytes)
    //        prog_name: buffer: {00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    //        00} (length 0x10) prog_ifindex: ifindex (resource)
    //        expected_attach_type: union bpf_prog_attach_types {
    //          sk_msg: sk_msg_attach_types = 0x0 (4 bytes)
    //        }
    //        btf_fd: fd_btf (resource)
    //        func_info_rec_size: const = 0x8 (4 bytes)
    //        func_info: nil
    //        func_info_cnt: len = 0x0 (4 bytes)
    //        line_info_rec_size: const = 0x10 (4 bytes)
    //        line_info: nil
    //        line_info_cnt: len = 0x0 (4 bytes)
    //        attach_btf_id: bpf_btf_id (resource)
    //        attach_prog_fd: fd_bpf_prog (resource)
    //        core_relo_cnt: len = 0x0 (4 bytes)
    //        fd_array: nil
    //        core_relos: nil
    //        core_relo_rec_size: const = 0x10 (4 bytes)
    //        log_true_size: int32 = 0x0 (4 bytes)
    //        prog_token_fd: union _bpf_prog_t[flags[bpf_prog_type, int32],
    //        bpf_prog_attach_types, bpf_btf_id[opt],
    //        fd_bpf_prog[opt]]_prog_token_fd_wrapper {
    //          void: buffer: {} (length 0x0)
    //        }
    //        pad: union _bpf_prog_t[flags[bpf_prog_type, int32],
    //        bpf_prog_attach_types, bpf_btf_id[opt],
    //        fd_bpf_prog[opt]]_pad_wrapper {
    //          value: const = 0x0 (4 bytes)
    //        }
    //      }
    //    }
    //    size: len = 0x94 (8 bytes)
    //  ]
    //  returns fd_bpf_prog
    *(uint32_t*)0x20000000e000 = 0x10;
    *(uint32_t*)0x20000000e004 = 4;
    *(uint64_t*)0x20000000e008 = 0x200000000040;
    memcpy((void*)0x200000000040,
           "\xb4\x00\x00\x00\x00\x00\x00\x00\x79\x10\x48\x00\x00\x00\x00\x00"
           "\x61\x04\x00\x00\x00\x00\x00\x00\x95\x00\x00\x72",
           28);
    *(uint64_t*)0x20000000e010 = 0;
    *(uint32_t*)0x20000000e018 = 2;
    *(uint32_t*)0x20000000e01c = 0xc3;
    *(uint64_t*)0x20000000e020 = 0x20000000cf3d;
    *(uint32_t*)0x20000000e028 = 0;
    *(uint32_t*)0x20000000e02c = 0;
    memset((void*)0x20000000e030, 0, 16);
    *(uint32_t*)0x20000000e040 = 0;
    *(uint32_t*)0x20000000e044 = 0;
    *(uint32_t*)0x20000000e048 = -1;
    *(uint32_t*)0x20000000e04c = 8;
    *(uint64_t*)0x20000000e050 = 0;
    *(uint32_t*)0x20000000e058 = 0;
    *(uint32_t*)0x20000000e05c = 0x10;
    *(uint64_t*)0x20000000e060 = 0;
    *(uint32_t*)0x20000000e068 = 0;
    *(uint32_t*)0x20000000e06c = 0;
    *(uint32_t*)0x20000000e070 = -1;
    *(uint32_t*)0x20000000e074 = 0;
    *(uint64_t*)0x20000000e078 = 0;
    *(uint64_t*)0x20000000e080 = 0;
    *(uint32_t*)0x20000000e088 = 0x10;
    *(uint32_t*)0x20000000e08c = 0;
    *(uint32_t*)0x20000000e090 = 0;
    syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x20000000e000ul, /*size=*/0x94ul);
    break;
  case 5:
    //  timer_create arguments: [
    //    id: clock_id = 0x0 (8 bytes)
    //    ev: ptr[in, sigevent] {
    //      sigevent {
    //        val: const = 0x0 (8 bytes)
    //        signo: int32 = 0x21 (4 bytes)
    //        notify: sigev_notify = 0x2 (4 bytes)
    //        u: union sigevent_u {
    //          thr: sigevent_thread {
    //            func: nil
    //            attr: nil
    //          }
    //        }
    //        pad = 0x0 (32 bytes)
    //      }
    //    }
    //    timerid: ptr[out, timerid] {
    //      timerid (resource)
    //    }
    //  ]
    *(uint64_t*)0x2000000000c0 = 0;
    *(uint32_t*)0x2000000000c8 = 0x21;
    *(uint32_t*)0x2000000000cc = 2;
    *(uint64_t*)0x2000000000d0 = 0;
    *(uint64_t*)0x2000000000d8 = 0;
    res = syscall(__NR_timer_create, /*id=*/0ul, /*ev=*/0x2000000000c0ul,
                  /*timerid=*/0x200000000300ul);
    if (res != -1)
      r[1] = *(uint32_t*)0x200000000300;
    break;
  case 6:
    //  fcntl$lock arguments: [
    //    fd: fd (resource)
    //    cmd: fcntl_lock = 0x24 (8 bytes)
    //    lock: ptr[in, flock] {
    //      flock {
    //        type: flock_type = 0x0 (2 bytes)
    //        whence: seek_whence = 0x0 (2 bytes)
    //        pad = 0x0 (4 bytes)
    //        start: intptr = 0x10001 (8 bytes)
    //        len: intptr = 0x5 (8 bytes)
    //        pid: pid (resource)
    //        pad = 0x0 (4 bytes)
    //      }
    //    }
    //  ]
    *(uint16_t*)0x200000000040 = 0;
    *(uint16_t*)0x200000000042 = 0;
    *(uint64_t*)0x200000000048 = 0x10001;
    *(uint64_t*)0x200000000050 = 5;
    *(uint32_t*)0x200000000058 = 0;
    syscall(__NR_fcntl, /*fd=*/(intptr_t)-1, /*cmd=F_OFD_GETLK*/ 0x24ul,
            /*lock=*/0x200000000040ul);
    break;
  case 7:
    //  mprotect arguments: [
    //    addr: VMA[0xf000]
    //    len: len = 0xf000 (8 bytes)
    //    prot: mmap_prot = 0x1 (8 bytes)
    //  ]
    syscall(__NR_mprotect, /*addr=*/0x200000000000ul, /*len=*/0xf000ul,
            /*prot=PROT_READ*/ 1ul);
    break;
  case 8:
    //  timer_settime arguments: [
    //    timerid: timerid (resource)
    //    flags: timer_flags = 0x1 (8 bytes)
    //    new: ptr[in, itimerspec] {
    //      itimerspec {
    //        interv: timespec {
    //          sec: time_sec (resource)
    //          nsec: time_nsec (resource)
    //        }
    //        value: timespec {
    //          sec: time_sec (resource)
    //          nsec: time_nsec (resource)
    //        }
    //      }
    //    }
    //    old: nil
    //  ]
    *(uint64_t*)0x200000000040 = 0;
    *(uint64_t*)0x200000000048 = 0;
    *(uint64_t*)0x200000000050 = 0;
    *(uint64_t*)0x200000000058 = 0x989680;
    syscall(__NR_timer_settime, /*timerid=*/r[1], /*flags=TIMER_ABSTIME*/ 1ul,
            /*new=*/0x200000000040ul, /*old=*/0ul);
    break;
  }
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffffffff000ul, /*len=*/0x1000, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x200000000000ul, /*len=*/0x1000000,
          /*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=*/0x1000, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  const char* reason;
  (void)reason;
  loop();
  return 0;
}