// https://syzkaller.appspot.com/bug?id=28bc35dd6f026b2878e30804670f6f0c39932f16
// autogenerated by syzkaller (http://github.com/google/syzkaller)

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

static uintptr_t syz_open_pts(uintptr_t a0, uintptr_t a1)
{
  int ptyno = 0;
  if (ioctl(a0, TIOCGPTN, &ptyno))
    return -1;
  char buf[128];
  sprintf(buf, "/dev/pts/%d", ptyno);
  return open(buf, a1, 0);
}

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 (running)
          usleep((call == num_calls - 1) ? 10000 : 1000);
        break;
      }
    }
  }
}

long r[2];
void execute_call(int call)
{
  switch (call) {
  case 0:
    *(uint32_t*)0x20000040 = 0xf0a9;
    syscall(__NR_setsockopt, -1, 0x107, 0, 0x20000040, 4);
    break;
  case 1:
    memcpy((void*)0x200000c0, "/dev/sequencer", 15);
    r[0] = syscall(__NR_openat, 0xffffffffffffff9c, 0x200000c0, 0x82002, 0);
    break;
  case 2:
    syscall(__NR_ioctl, r[0], 0x541b, 0x20000100);
    break;
  case 3:
    r[1] = syz_open_pts(-1, 0);
    break;
  case 4:
    *(uint64_t*)0x200005c0 = 0x200004c0;
    *(uint64_t*)0x200005c8 = 0xce;
    syscall(__NR_ptrace, 0x4204, 0, 4, 0x200005c0);
    break;
  case 5:
    *(uint32_t*)0x20000780 = 0;
    *(uint16_t*)0x20000784 = 2;
    *(uint16_t*)0x20000786 = htobe16(0x4e20);
    *(uint32_t*)0x20000788 = htobe32(0xe0000001);
    *(uint8_t*)0x2000078c = 0;
    *(uint8_t*)0x2000078d = 0;
    *(uint8_t*)0x2000078e = 0;
    *(uint8_t*)0x2000078f = 0;
    *(uint8_t*)0x20000790 = 0;
    *(uint8_t*)0x20000791 = 0;
    *(uint8_t*)0x20000792 = 0;
    *(uint8_t*)0x20000793 = 0;
    *(uint64_t*)0x20000794 = 0;
    *(uint64_t*)0x2000079c = 0;
    *(uint64_t*)0x200007a4 = 0;
    *(uint64_t*)0x200007ac = 0;
    *(uint64_t*)0x200007b4 = 0;
    *(uint64_t*)0x200007bc = 0;
    *(uint64_t*)0x200007c4 = 0;
    *(uint64_t*)0x200007cc = 0;
    *(uint64_t*)0x200007d4 = 0;
    *(uint64_t*)0x200007dc = 0;
    *(uint64_t*)0x200007e4 = 0;
    *(uint64_t*)0x200007ec = 0;
    *(uint64_t*)0x200007f4 = 0;
    *(uint64_t*)0x200007fc = 0;
    *(uint64_t*)0x20000804 = 0;
    syscall(__NR_setsockopt, r[0], 0x84, 6, 0x20000780, 0x8c);
    break;
  case 6:
    syscall(__NR_setsockopt, r[0], 1, 0x24, 0, 0);
    break;
  case 7:
    *(uint64_t*)0x200031c0 = 0x200009c0;
    *(uint16_t*)0x200009c0 = 0x10;
    *(uint16_t*)0x200009c2 = 0;
    *(uint32_t*)0x200009c4 = 0;
    *(uint32_t*)0x200009c8 = 0x9024800;
    *(uint32_t*)0x200031c8 = 0xc;
    *(uint64_t*)0x200031d0 = 0x20003180;
    *(uint64_t*)0x20003180 = 0x20000a00;
    *(uint32_t*)0x20000a00 = 0x74;
    *(uint16_t*)0x20000a04 = 0x29;
    *(uint16_t*)0x20000a06 = 0x12;
    *(uint32_t*)0x20000a08 = 0x70bd28;
    *(uint32_t*)0x20000a0c = 0x25dfdbfc;
    *(uint8_t*)0x20000a10 = 0xc;
    *(uint8_t*)0x20000a11 = 0;
    *(uint16_t*)0x20000a12 = 0;
    *(uint16_t*)0x20000a14 = 0x34;
    *(uint16_t*)0x20000a16 = 0x37;
    *(uint16_t*)0x20000a18 = 0x18;
    *(uint16_t*)0x20000a1a = 0x67;
    *(uint8_t*)0x20000a20 = 0xfe;
    *(uint8_t*)0x20000a21 = 0x80;
    *(uint8_t*)0x20000a22 = 0;
    *(uint8_t*)0x20000a23 = 0;
    *(uint8_t*)0x20000a24 = 0;
    *(uint8_t*)0x20000a25 = 0;
    *(uint8_t*)0x20000a26 = 0;
    *(uint8_t*)0x20000a27 = 0;
    *(uint8_t*)0x20000a28 = 0;
    *(uint8_t*)0x20000a29 = 0;
    *(uint8_t*)0x20000a2a = 0;
    *(uint8_t*)0x20000a2b = 0;
    *(uint8_t*)0x20000a2c = 0;
    *(uint8_t*)0x20000a2d = 0;
    *(uint8_t*)0x20000a2e = 0;
    *(uint8_t*)0x20000a2f = 0xbb;
    *(uint16_t*)0x20000a30 = 0xc;
    *(uint16_t*)0x20000a32 = 0x2b;
    *(uint32_t*)0x20000a38 = 8;
    *(uint16_t*)0x20000a3c = 0xc;
    *(uint16_t*)0x20000a3e = 0x2c;
    *(uint32_t*)0x20000a44 = htobe32(0x7f000001);
    *(uint16_t*)0x20000a48 = 0xc;
    *(uint16_t*)0x20000a4a = 0;
    *(uint16_t*)0x20000a4c = 8;
    *(uint16_t*)0x20000a4e = 0x42;
    *(uint16_t*)0x20000a54 = 0x20;
    *(uint16_t*)0x20000a56 = 0x7c;
    *(uint16_t*)0x20000a58 = 8;
    *(uint16_t*)0x20000a5a = 0x7a;
    *(uint16_t*)0x20000a60 = 0xc;
    *(uint16_t*)0x20000a62 = 0xff;
    memcpy((void*)0x20000a68, ".", 2);
    *(uint16_t*)0x20000a6c = 8;
    *(uint16_t*)0x20000a6e = 0x47;
    *(uint64_t*)0x20003188 = 0x74;
    *(uint64_t*)0x200031d8 = 1;
    *(uint64_t*)0x200031e0 = 0;
    *(uint64_t*)0x200031e8 = 0;
    *(uint32_t*)0x200031f0 = 0x4000000;
    syscall(__NR_sendmsg, r[0], 0x200031c0, 0);
    break;
  case 8:
    syscall(__NR_setsockopt, r[1], 0x107, 7, 0x20003200, 0);
    break;
  }
}

void loop()
{
  memset(r, -1, sizeof(r));
  execute(9);
}

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