// https://syzkaller.appspot.com/bug?id=4557dec99e8a9bbb8939ff244ff1b7c46adcc0d4
// autogenerated by syzkaller (http://github.com/google/syzkaller)

#define _GNU_SOURCE
#include <endian.h>
#include <linux/futex.h>
#include <pthread.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <sys/syscall.h>
#include <unistd.h>

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

void loop()
{
  while (1) {
    execute_one();
  }
}

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 int collide;

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);
        if (collide && call % 2)
          break;
        struct timespec ts;
        ts.tv_sec = 0;
        ts.tv_nsec = 20 * 1000 * 1000;
        syscall(SYS_futex, &th->running, FUTEX_WAIT, 1, &ts);
        if (running)
          usleep((call == num_calls - 1) ? 10000 : 1000);
        break;
      }
    }
  }
}

uint64_t r[2] = {0xffffffffffffffff, 0xffffffffffffffff};
void execute_call(int call)
{
  long res;
  switch (call) {
  case 0:
    res = syscall(__NR_socket, 0x26, 5, 0);
    if (res != -1)
      r[0] = res;
    break;
  case 1:
    *(uint16_t*)0x20000080 = 0x26;
    memcpy((void*)0x20000082,
           "\x61\x65\x61\x64\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 14);
    *(uint32_t*)0x20000090 = 0;
    *(uint32_t*)0x20000094 = 0;
    memcpy((void*)0x20000098,
           "\x67\x63\x6d\x5f\x62\x61\x73\x65\x28\x63\x74\x72\x2d\x61\x65\x73"
           "\x2d\x61\x65\x73\x6e\x69\x2c\x63\x62\x63\x6d\x61\x63\x28\x61\x65"
           "\x73\x2d\x67\x65\x6e\x65\x72\x69\x63\x29\x29\x00\x00\x00\x00\x00"
           "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00",
           64);
    syscall(__NR_bind, r[0], 0x20000080, 0x58);
    break;
  case 2:
    memcpy((void*)0x20ff8000,
           "\x0a\x07\x75\xb0\x05\xe3\x81\xe5\xb3\xb6\x0c\xed\x5c\x54\xdb\xb7",
           16);
    syscall(__NR_setsockopt, r[0], 0x117, 1, 0x20ff8000, 0x10);
    break;
  case 3:
    res = syscall(__NR_accept, r[0], 0, 0);
    if (res != -1)
      r[1] = res;
    break;
  case 4:
    *(uint64_t*)0x20003040 = 0;
    *(uint32_t*)0x20003048 = 0;
    *(uint64_t*)0x20003050 = 0x20000300;
    *(uint64_t*)0x20000300 = 0x20000200;
    memcpy((void*)0x20000200, "\x37\xc9\x28\x6f\x2e", 5);
    *(uint64_t*)0x20000308 = 5;
    *(uint64_t*)0x20003058 = 1;
    *(uint64_t*)0x20003060 = 0x20002480;
    *(uint64_t*)0x20002480 = 0x18;
    *(uint32_t*)0x20002488 = 0x117;
    *(uint32_t*)0x2000248c = 3;
    *(uint32_t*)0x20002490 = 1;
    *(uint64_t*)0x20003068 = 0x18;
    *(uint32_t*)0x20003070 = 0;
    syscall(__NR_sendmmsg, r[1], 0x20003040, 1, 0);
    break;
  case 5:
    *(uint64_t*)0x20001440 = 0x20000280;
    *(uint32_t*)0x20001448 = 0x80;
    *(uint64_t*)0x20001450 = 0x200013c0;
    *(uint64_t*)0x200013c0 = 0x200003c0;
    *(uint64_t*)0x200013c8 = 0x1000;
    *(uint64_t*)0x20001458 = 1;
    *(uint64_t*)0x20001460 = 0x20001400;
    *(uint64_t*)0x20001468 = 6;
    *(uint32_t*)0x20001470 = 0;
    syscall(__NR_recvmsg, r[1], 0x20001440, 0);
    break;
  }
}

void execute_one()
{
  execute(6);
  collide = 1;
  execute(6);
}

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