// https://syzkaller.appspot.com/bug?id=d204aaca3ac260c553e053c566b529f350ea6454
// autogenerated by syzkaller (http://github.com/google/syzkaller)

#define _GNU_SOURCE
#include <endian.h>
#include <fcntl.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/sysmacros.h>
#include <unistd.h>

#define BITMASK_LEN(type, bf_len) (type)((1ull << (bf_len)) - 1)

#define BITMASK_LEN_OFF(type, bf_off, bf_len)                                  \
  (type)(BITMASK_LEN(type, (bf_len)) << (bf_off))

#define STORE_BY_BITMASK(type, addr, val, bf_off, bf_len)                      \
  if ((bf_off) == 0 && (bf_len) == 0) {                                        \
    *(type*)(addr) = (type)(val);                                              \
  } else {                                                                     \
    type new_val = *(type*)(addr);                                             \
    new_val &= ~BITMASK_LEN_OFF(type, (bf_off), (bf_len));                     \
    new_val |= ((type)(val)&BITMASK_LEN(type, (bf_len))) << (bf_off);          \
    *(type*)(addr) = new_val;                                                  \
  }

struct csum_inet {
  uint32_t acc;
};

static void csum_inet_init(struct csum_inet* csum)
{
  csum->acc = 0;
}

static void csum_inet_update(struct csum_inet* csum, const uint8_t* data,
                             size_t length)
{
  if (length == 0)
    return;

  size_t i;
  for (i = 0; i < length - 1; i += 2)
    csum->acc += *(uint16_t*)&data[i];

  if (length & 1)
    csum->acc += (uint16_t)data[length - 1];

  while (csum->acc > 0xffff)
    csum->acc = (csum->acc & 0xffff) + (csum->acc >> 16);
}

static uint16_t csum_inet_digest(struct csum_inet* csum)
{
  return ~csum->acc;
}

static uintptr_t syz_fuse_mount(uintptr_t a0, uintptr_t a1, uintptr_t a2,
                                uintptr_t a3, uintptr_t a4, uintptr_t a5)
{
  uint64_t target = a0;
  uint64_t mode = a1;
  uint64_t uid = a2;
  uint64_t gid = a3;
  uint64_t maxread = a4;
  uint64_t flags = a5;

  int fd = open("/dev/fuse", O_RDWR);
  if (fd == -1)
    return fd;
  char buf[1024];
  sprintf(buf, "fd=%d,user_id=%ld,group_id=%ld,rootmode=0%o", fd, (long)uid,
          (long)gid, (unsigned)mode & ~3u);
  if (maxread != 0)
    sprintf(buf + strlen(buf), ",max_read=%ld", (long)maxread);
  if (mode & 1)
    strcat(buf, ",default_permissions");
  if (mode & 2)
    strcat(buf, ",allow_other");
  syscall(SYS_mount, "", target, "fuse", flags, buf);
  return fd;
}

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

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

uint64_t r[2] = {0xffffffffffffffff, 0xffffffffffffffff};
void execute_one()
{
  long res = 0;
  res = syscall(__NR_socket, 0xa, 0x80803, 0x2f);
  if (res != -1)
    r[0] = res;
  res = syscall(__NR_socket, 0x10, 3, 6);
  if (res != -1)
    r[1] = res;
  *(uint16_t*)0x200004c0 = 0x10;
  *(uint16_t*)0x200004c2 = 0;
  *(uint32_t*)0x200004c4 = 0;
  *(uint32_t*)0x200004c8 = 1;
  syscall(__NR_bind, r[1], 0x200004c0, 0xc);
  *(uint8_t*)0x200003c0 = 0xac;
  *(uint8_t*)0x200003c1 = 0x14;
  *(uint8_t*)0x200003c2 = 0x14;
  *(uint8_t*)0x200003c3 = 0;
  *(uint64_t*)0x200003d0 = htobe64(0);
  *(uint64_t*)0x200003d8 = htobe64(1);
  *(uint16_t*)0x200003e0 = htobe16(0);
  *(uint16_t*)0x200003e2 = htobe16(0);
  *(uint16_t*)0x200003e4 = htobe16(0);
  *(uint16_t*)0x200003e6 = htobe16(0);
  *(uint16_t*)0x200003e8 = 0xa;
  *(uint8_t*)0x200003ea = 0;
  *(uint8_t*)0x200003eb = 0;
  *(uint8_t*)0x200003ec = 0;
  *(uint32_t*)0x200003f0 = 0;
  *(uint32_t*)0x200003f4 = 0;
  *(uint64_t*)0x200003f8 = 0;
  *(uint64_t*)0x20000400 = 0;
  *(uint64_t*)0x20000408 = 0;
  *(uint64_t*)0x20000410 = 0;
  *(uint64_t*)0x20000418 = 0;
  *(uint64_t*)0x20000420 = 0;
  *(uint64_t*)0x20000428 = 0;
  *(uint64_t*)0x20000430 = 0;
  *(uint64_t*)0x20000438 = 0;
  *(uint64_t*)0x20000440 = 0;
  *(uint64_t*)0x20000448 = 0;
  *(uint64_t*)0x20000450 = 0;
  *(uint32_t*)0x20000458 = 0;
  *(uint32_t*)0x2000045c = 0;
  *(uint8_t*)0x20000460 = 1;
  *(uint8_t*)0x20000461 = 0;
  *(uint8_t*)0x20000462 = 0;
  *(uint8_t*)0x20000463 = 0;
  *(uint64_t*)0x20000468 = htobe64(0);
  *(uint64_t*)0x20000470 = htobe64(1);
  *(uint32_t*)0x20000478 = htobe32(0);
  *(uint8_t*)0x2000047c = 0x2b;
  *(uint16_t*)0x20000480 = 0;
  *(uint8_t*)0x20000484 = 0xac;
  *(uint8_t*)0x20000485 = 0x14;
  *(uint8_t*)0x20000486 = 0x14;
  *(uint8_t*)0x20000487 = 0xbb;
  *(uint32_t*)0x20000494 = 0;
  *(uint8_t*)0x20000498 = 0;
  *(uint8_t*)0x20000499 = 0;
  *(uint8_t*)0x2000049a = 0x90;
  *(uint32_t*)0x2000049c = 0;
  *(uint32_t*)0x200004a0 = 0;
  *(uint32_t*)0x200004a4 = 0;
  syscall(__NR_setsockopt, r[0], 0x29, 0x23, 0x200003c0, 0xe8);
  *(uint16_t*)0x200000c0 = 0xa;
  *(uint16_t*)0x200000c2 = htobe16(0);
  *(uint32_t*)0x200000c4 = 0;
  *(uint8_t*)0x200000c8 = 0;
  *(uint8_t*)0x200000c9 = 0;
  *(uint8_t*)0x200000ca = 0;
  *(uint8_t*)0x200000cb = 0;
  *(uint8_t*)0x200000cc = 0;
  *(uint8_t*)0x200000cd = 0;
  *(uint8_t*)0x200000ce = 0;
  *(uint8_t*)0x200000cf = 0;
  *(uint8_t*)0x200000d0 = 0;
  *(uint8_t*)0x200000d1 = 0;
  *(uint8_t*)0x200000d2 = 0;
  *(uint8_t*)0x200000d3 = 0;
  *(uint8_t*)0x200000d4 = 0;
  *(uint8_t*)0x200000d5 = 0;
  *(uint8_t*)0x200000d6 = 0;
  *(uint8_t*)0x200000d7 = 0;
  *(uint32_t*)0x200000d8 = 0;
  syscall(__NR_connect, r[0], 0x200000c0, 0x1c);
  *(uint8_t*)0x20000040 = 1;
  *(uint8_t*)0x20000041 = 0x80;
  *(uint8_t*)0x20000042 = 0xc2;
  *(uint8_t*)0x20000043 = 0;
  *(uint8_t*)0x20000044 = 0;
  *(uint8_t*)0x20000045 = 0;
  *(uint8_t*)0x20000046 = 0xaa;
  *(uint8_t*)0x20000047 = 0xaa;
  *(uint8_t*)0x20000048 = 0xaa;
  *(uint8_t*)0x20000049 = 0xaa;
  *(uint8_t*)0x2000004a = 0;
  *(uint8_t*)0x2000004b = 0;
  *(uint16_t*)0x2000004c = htobe16(0x800);
  STORE_BY_BITMASK(uint8_t, 0x2000004e, 5, 0, 4);
  STORE_BY_BITMASK(uint8_t, 0x2000004e, 4, 4, 4);
  STORE_BY_BITMASK(uint8_t, 0x2000004f, 0, 0, 2);
  STORE_BY_BITMASK(uint8_t, 0x2000004f, 0, 2, 6);
  *(uint16_t*)0x20000050 = htobe16(0x1c);
  *(uint16_t*)0x20000052 = htobe16(0);
  *(uint16_t*)0x20000054 = htobe16(0);
  *(uint8_t*)0x20000056 = 0;
  *(uint8_t*)0x20000057 = 2;
  *(uint16_t*)0x20000058 = 0;
  *(uint32_t*)0x2000005a = htobe32(0);
  *(uint32_t*)0x2000005e = htobe32(0xe0000001);
  *(uint8_t*)0x20000062 = 0;
  *(uint8_t*)0x20000063 = 0;
  *(uint16_t*)0x20000064 = 0;
  *(uint32_t*)0x20000066 = htobe32(0);
  *(uint32_t*)0x203b5000 = 0;
  *(uint32_t*)0x203b5004 = 0;
  *(uint32_t*)0x203b5008 = 0;
  *(uint32_t*)0x203b500c = 0;
  *(uint32_t*)0x203b5010 = 0;
  *(uint32_t*)0x203b5014 = 0;
  struct csum_inet csum_1;
  csum_inet_init(&csum_1);
  csum_inet_update(&csum_1, (const uint8_t*)0x20000062, 8);
  *(uint16_t*)0x20000064 = csum_inet_digest(&csum_1);
  struct csum_inet csum_2;
  csum_inet_init(&csum_2);
  csum_inet_update(&csum_2, (const uint8_t*)0x2000004e, 20);
  *(uint16_t*)0x20000058 = csum_inet_digest(&csum_2);
  memcpy((void*)0x200003c0, "./file0", 8);
  syscall(__NR_mkdir, 0x200003c0, 0);
  memcpy((void*)0x20000180, "./file0", 8);
  syz_fuse_mount(0x20000180, 0x4000, 0, 0, 0, 0);
}

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