// https://syzkaller.appspot.com/bug?id=fd0f9041cf7c93c445cf121b545df960b1a315b6
// 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_fsconfig
#define __NR_fsconfig 431
#endif
#ifndef __NR_fsopen
#define __NR_fsopen 430
#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[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff};

void execute_call(int call)
{
  intptr_t res = 0;
  switch (call) {
  case 0:
    //  socket$inet arguments: [
    //    domain: const = 0x2 (8 bytes)
    //    type: socket_type = 0x1 (8 bytes)
    //    proto: int32 = 0x0 (4 bytes)
    //  ]
    //  returns sock_in
    res = syscall(__NR_socket, /*domain=*/2ul, /*type=SOCK_STREAM*/ 1ul,
                  /*proto=*/0);
    if (res != -1)
      r[0] = res;
    break;
  case 1:
    //  bind$inet arguments: [
    //    fd: sock_in (resource)
    //    addr: ptr[in, sockaddr_in] {
    //      sockaddr_in {
    //        family: const = 0x2 (2 bytes)
    //        port: int16be = 0x1a0a (2 bytes)
    //        addr: union ipv4_addr {
    //          empty: const = 0x0 (4 bytes)
    //        }
    //        pad = 0x0 (8 bytes)
    //      }
    //    }
    //    addrlen: len = 0x10 (8 bytes)
    //  ]
    *(uint16_t*)0x200000000000 = 2;
    *(uint16_t*)0x200000000002 = htobe16(0x1a0a);
    *(uint32_t*)0x200000000004 = htobe32(0);
    syscall(__NR_bind, /*fd=*/r[0], /*addr=*/0x200000000000ul,
            /*addrlen=*/0x10ul);
    break;
  case 2:
    //  listen arguments: [
    //    fd: sock (resource)
    //    backlog: int32 = 0x5 (4 bytes)
    //  ]
    syscall(__NR_listen, /*fd=*/r[0], /*backlog=*/5);
    break;
  case 3:
    //  fsopen arguments: [
    //    type: ptr[in, buffer] {
    //      buffer: {63 65 70 68 00} (length 0x5)
    //    }
    //    flags: fsopen_flags = 0x0 (8 bytes)
    //  ]
    //  returns fd_fscontext
    memcpy((void*)0x200000000100, "ceph\000", 5);
    res = syscall(__NR_fsopen, /*type=*/0x200000000100ul, /*flags=*/0ul);
    if (res != -1)
      r[1] = res;
    break;
  case 4:
    //  fsconfig$FSCONFIG_SET_STRING arguments: [
    //    fd: fd_fscontext (resource)
    //    cmd: const = 0x1 (8 bytes)
    //    key: ptr[in, buffer] {
    //      buffer: {73 6f 75 72 63 65 00} (length 0x7)
    //    }
    //    value: ptr[in, buffer] {
    //      buffer: {31 32 37 2e 30 2e 30 2e 31 3a 36 36 36 36 3a 2f 70 61 74 68
    //      00} (length 0x15)
    //    }
    //    aux: const = 0x0 (8 bytes)
    //  ]
    memcpy((void*)0x200000000200, "source\000", 7);
    memcpy((void*)0x200000000300, "127.0.0.1:6666:/path\000", 21);
    syscall(__NR_fsconfig, /*fd=*/r[1], /*cmd=*/1ul, /*key=*/0x200000000200ul,
            /*value=*/0x200000000300ul, /*aux=*/0ul);
    break;
  case 5:
    //  fsconfig$FSCONFIG_CMD_CREATE arguments: [
    //    fd: fd_fscontext (resource)
    //    cmd: const = 0x6 (8 bytes)
    //    key: const = 0x0 (8 bytes)
    //    value: const = 0x0 (8 bytes)
    //    aux: const = 0x0 (8 bytes)
    //  ]
    syscall(__NR_fsconfig, /*fd=*/r[1], /*cmd=*/6ul, /*key=*/0ul, /*value=*/0ul,
            /*aux=*/0ul);
    break;
  case 6:
    //  accept$inet arguments: [
    //    fd: sock_in (resource)
    //    peer: nil
    //    peerlen: nil
    //  ]
    //  returns sock_in
    res = syscall(__NR_accept, /*fd=*/r[0], /*peer=*/0ul, /*peerlen=*/0ul);
    if (res != -1)
      r[2] = res;
    break;
  case 7:
    //  write arguments: [
    //    fd: fd (resource)
    //    buf: ptr[in, buffer] {
    //      buffer: {63 65 70 68 20 76 30 32 37 00 00 00 00 00 00 00 00 02 00 1a
    //      0a 7f 00 00 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 02 00
    //      1a 0a 7f 00 00 01 00 00 00 00 00 00 00 00 00 00 00 00} (length 0x3d)
    //    }
    //    count: len = 0x41 (8 bytes)
    //  ]
    memcpy((void*)0x200000000800,
           "\x63\x65\x70\x68\x20\x76\x30\x32\x37\x00\x00\x00\x00\x00\x00\x00"
           "\x00\x02\x00\x1a\x0a\x7f\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00"
           "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x1a\x0a\x7f\x00\x00"
           "\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00",
           61);
    syscall(__NR_write, /*fd=*/r[2], /*buf=*/0x200000000800ul,
            /*count=*/0x41ul);
    break;
  case 8:
    //  write arguments: [
    //    fd: fd (resource)
    //    buf: ptr[in, buffer] {
    //      buffer: {04 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    //      00 00 00 00 04 00 00 00 00 00 00 00 00 00 00 00 12 00 00 00 5d 9e 5b
    //      72 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    //      00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 01 00 00 00 01
    //      00 00 00 02 00 1a 0a 7f 00 00 01 00 00 00 00 00 00 00 00 5d 9e 5b
    //      72} (length 0x70)
    //    }
    //    count: len = 0x55 (8 bytes)
    //  ]
    memcpy((void*)0x200000000b00,
           "\x04\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
           "\x00\x00\x00\x00\x00\x00\x00\x00\x04\x00\x00\x00\x00\x00\x00\x00"
           "\x00\x00\x00\x00\x12\x00\x00\x00\x5d\x9e\x5b\x72\x01\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\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
           "\x00\x00\x00\x00\x01\x00\x00\x00\x01\x00\x00\x00\x02\x00\x1a\x0a"
           "\x7f\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x5d\x9e\x5b\x72",
           112);
    syscall(__NR_write, /*fd=*/r[2], /*buf=*/0x200000000b00ul,
            /*count=*/0x55ul);
    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;
}