// https://syzkaller.appspot.com/bug?id=3983f8a8d83851a54a0b9f9e75cb3464e9c70aef
// autogenerated by syzkaller (http://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <errno.h>
#include <fcntl.h>
#include <sched.h>
#include <signal.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdio.h>
#include <sys/prctl.h>
#include <sys/resource.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/time.h>
#include <sys/wait.h>
#include <unistd.h>

__attribute__((noreturn)) static void doexit(int status)
{
  volatile unsigned i;
  syscall(__NR_exit_group, status);
  for (i = 0;; i++) {
  }
}

#include <stdint.h>
#include <string.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_open_dev(uintptr_t a0, uintptr_t a1, uintptr_t a2)
{
  if (a0 == 0xc || a0 == 0xb) {
    char buf[128];
    sprintf(buf, "/dev/%s/%d:%d", a0 == 0xc ? "char" : "block",
            (uint8_t)a1, (uint8_t)a2);
    return open(buf, O_RDWR, 0);
  } else {
    char buf[1024];
    char* hash;
    strncpy(buf, (char*)a0, sizeof(buf));
    buf[sizeof(buf) - 1] = 0;
    while ((hash = strchr(buf, '#'))) {
      *hash = '0' + (char)(a1 % 10);
      a1 /= 10;
    }
    return open(buf, a2, 0);
  }
}

static void loop();

static void sandbox_common()
{
  prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
  setpgrp();
  setsid();

  struct rlimit rlim;
  rlim.rlim_cur = rlim.rlim_max = 128 << 20;
  setrlimit(RLIMIT_AS, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 8 << 20;
  setrlimit(RLIMIT_MEMLOCK, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 1 << 20;
  setrlimit(RLIMIT_FSIZE, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 1 << 20;
  setrlimit(RLIMIT_STACK, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 0;
  setrlimit(RLIMIT_CORE, &rlim);

  unshare(CLONE_NEWNS);
  unshare(CLONE_NEWIPC);
  unshare(CLONE_IO);
}

static int do_sandbox_none(int executor_pid, bool enable_tun)
{
  int pid = fork();
  if (pid)
    return pid;

  sandbox_common();

  loop();
  doexit(1);
}

static void test();

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

long r[103];
void test()
{
  memset(r, -1, sizeof(r));
  r[0] = syscall(__NR_mmap, 0x20000000ul, 0xfff000ul, 0x3ul, 0x32ul,
                 0xfffffffffffffffful, 0x0ul);
  *(uint32_t*)0x201a0000 = (uint32_t)0x0;
  *(uint16_t*)0x201a0004 = (uint16_t)0xa;
  *(uint16_t*)0x201a0006 = (uint16_t)0x214e;
  *(uint32_t*)0x201a0008 = (uint32_t)0xcaa0;
  *(uint64_t*)0x201a000c = (uint64_t)0x0;
  *(uint64_t*)0x201a0014 = (uint64_t)0x100000000000000;
  *(uint32_t*)0x201a001c = (uint32_t)0x40;
  *(uint64_t*)0x201a0024 = (uint64_t)0x0;
  *(uint64_t*)0x201a002c = (uint64_t)0x0;
  *(uint64_t*)0x201a0034 = (uint64_t)0x0;
  *(uint64_t*)0x201a003c = (uint64_t)0x0;
  *(uint64_t*)0x201a0044 = (uint64_t)0x0;
  *(uint64_t*)0x201a004c = (uint64_t)0x0;
  *(uint64_t*)0x201a0054 = (uint64_t)0x0;
  *(uint64_t*)0x201a005c = (uint64_t)0x0;
  *(uint64_t*)0x201a0064 = (uint64_t)0x0;
  *(uint64_t*)0x201a006c = (uint64_t)0x0;
  *(uint64_t*)0x201a0074 = (uint64_t)0x0;
  *(uint64_t*)0x201a007c = (uint64_t)0x0;
  *(uint32_t*)0x201a008c = (uint32_t)0x8;
  *(uint16_t*)0x201a0090 = (uint16_t)0x9;
  *(uint32_t*)0x201a0092 = (uint32_t)0x1f;
  *(uint32_t*)0x201a0096 = (uint32_t)0xcc0c90b;
  *(uint32_t*)0x201a009a = (uint32_t)0x80;
  r[25] = syscall(__NR_setsockopt, 0xfffffffffffffffful, 0x84ul, 0x9ul,
                  0x201a0000ul, 0xa0ul);
  r[26] = syscall(__NR_socket, 0x2ul, 0x1ul, 0x0ul);
  memcpy((void*)0x2051fff3,
         "\x2f\x64\x65\x76\x2f\x6e\x65\x74\x2f\x74\x75\x6e\x00", 13);
  r[28] = syz_open_dev(0x2051fff3ul, 0x0ul, 0xaul);
  r[29] = syscall(__NR_fcntl, r[28], 0x0ul, r[28]);
  memcpy((void*)0x20a0c000, "\x67\x72\x65\x30\x00\x00\x00\x00\x00\x00"
                            "\x00\x00\x00\x00\x00\x00",
         16);
  memcpy((void*)0x20a0c010, "\x8b\x63\xa4\x33\x42\x87\x17\x61\xed\x4c"
                            "\xfc\xe8\x54\x86\xbe\xd8",
         16);
  r[32] = syscall(__NR_ioctl, r[29], 0x400454caul, 0x20a0c000ul);
  memcpy((void*)0x2062ffe0, "\x67\x72\x65\x30\x00\x00\x00\x00\x00\x00"
                            "\x00\x00\x00\x00\x00\x00",
         16);
  *(uint16_t*)0x2062fff0 = (uint16_t)0x301;
  r[35] = syscall(__NR_ioctl, r[26], 0x8914ul, 0x2062ffe0ul);
  *(uint32_t*)0x20293ffc = (uint32_t)0xfffffffffffffffc;
  r[37] = syscall(__NR_ioctl, r[28], 0x400454d4ul, 0x20293ffcul);
  r[38] = syscall(__NR_pwritev, 0xfffffffffffffffful, 0x2049efe0ul,
                  0x0ul, 0x0ul);
  *(uint8_t*)0x205e2000 = (uint8_t)0x3;
  *(uint8_t*)0x205e2001 = (uint8_t)0x3;
  *(uint16_t*)0x205e2002 = (uint16_t)0xfff;
  *(uint16_t*)0x205e2004 = (uint16_t)0x6;
  *(uint16_t*)0x205e2006 = (uint16_t)0x2;
  *(uint16_t*)0x205e2008 = (uint16_t)0x7;
  *(uint8_t*)0x205e200a = (uint8_t)0xaa;
  *(uint8_t*)0x205e200b = (uint8_t)0xaa;
  *(uint8_t*)0x205e200c = (uint8_t)0xaa;
  *(uint8_t*)0x205e200d = (uint8_t)0xaa;
  *(uint8_t*)0x205e200e = (uint8_t)0xaa;
  *(uint8_t*)0x205e200f = (uint8_t)0x0;
  memcpy((void*)0x205e2010, "\x97\x0c\xc9\x6f\x94\xd1", 6);
  *(uint16_t*)0x205e2016 = (uint16_t)0x2f89;
  STORE_BY_BITMASK(uint8_t, 0x205e2018, 0x11, 0, 4);
  STORE_BY_BITMASK(uint8_t, 0x205e2018, 0x4, 4, 4);
  STORE_BY_BITMASK(uint8_t, 0x205e2019, 0x91dc, 0, 2);
  STORE_BY_BITMASK(uint8_t, 0x205e2019, 0x5, 2, 6);
  *(uint16_t*)0x205e201a = (uint16_t)0x4c00;
  *(uint16_t*)0x205e201c = (uint16_t)0x6600;
  *(uint16_t*)0x205e201e = (uint16_t)0x1;
  *(uint8_t*)0x205e2020 = (uint8_t)0x5a;
  *(uint8_t*)0x205e2021 = (uint8_t)0x6c;
  *(uint16_t*)0x205e2022 = (uint16_t)0x0;
  *(uint32_t*)0x205e2024 = (uint32_t)0x10000e0;
  *(uint8_t*)0x205e2028 = (uint8_t)0xac;
  *(uint8_t*)0x205e2029 = (uint8_t)0x14;
  *(uint8_t*)0x205e202a = (uint8_t)0x0;
  *(uint8_t*)0x205e202b = (uint8_t)0xbb;
  *(uint8_t*)0x205e202c = (uint8_t)0x82;
  *(uint8_t*)0x205e202d = (uint8_t)0x2;
  *(uint8_t*)0x205e202e = (uint8_t)0x7;
  *(uint8_t*)0x205e202f = (uint8_t)0xb;
  *(uint8_t*)0x205e2030 = (uint8_t)0xfffffffffffffff7;
  *(uint8_t*)0x205e2031 = (uint8_t)0xac;
  *(uint8_t*)0x205e2032 = (uint8_t)0x14;
  *(uint8_t*)0x205e2033 = (uint8_t)0x0;
  *(uint8_t*)0x205e2034 = (uint8_t)0xbb;
  *(uint32_t*)0x205e2035 = (uint32_t)0xffffffff;
  *(uint8_t*)0x205e2039 = (uint8_t)0x86;
  *(uint8_t*)0x205e203a = (uint8_t)0x2;
  *(uint8_t*)0x205e203b = (uint8_t)0x83;
  *(uint8_t*)0x205e203c = (uint8_t)0x2;
  *(uint8_t*)0x205e203d = (uint8_t)0x0;
  *(uint8_t*)0x205e203e = (uint8_t)0x44;
  *(uint8_t*)0x205e203f = (uint8_t)0x1c;
  *(uint8_t*)0x205e2040 = (uint8_t)0x9;
  STORE_BY_BITMASK(uint8_t, 0x205e2041, 0x3, 0, 4);
  STORE_BY_BITMASK(uint8_t, 0x205e2041, 0x0, 4, 4);
  *(uint32_t*)0x205e2042 = (uint32_t)0xffffffff;
  *(uint32_t*)0x205e2046 = (uint32_t)0xff010000;
  *(uint32_t*)0x205e204a = (uint32_t)0x1b0a0000;
  *(uint32_t*)0x205e204e = (uint32_t)0x100;
  *(uint32_t*)0x205e2052 = (uint32_t)0x10000e0;
  *(uint32_t*)0x205e2056 = (uint32_t)0x1000080;
  *(uint8_t*)0x205e205a = (uint8_t)0x97;
  *(uint8_t*)0x205e205b = (uint8_t)0x2;
  *(uint8_t*)0x205e205c = (uint8_t)0x12;
  *(uint8_t*)0x205e205d = (uint8_t)0x4;
  *(uint16_t*)0x205e205e = (uint16_t)0x0;
  *(uint32_t*)0x205e2060 = (uint32_t)0x0;
  struct csum_inet csum_100;
  csum_inet_init(&csum_100);
  csum_inet_update(&csum_100, (const uint8_t*)0x205e205c, 8);
  *(uint16_t*)0x205e205e = csum_inet_digest(&csum_100);
  struct csum_inet csum_101;
  csum_inet_init(&csum_101);
  csum_inet_update(&csum_101, (const uint8_t*)0x205e2018, 68);
  *(uint16_t*)0x205e2022 = csum_inet_digest(&csum_101);
  r[102] = syscall(__NR_write, r[28], 0x205e2000ul, 0x64ul);
}

int main()
{
  int i;
  for (i = 0; i < 8; i++) {
    if (fork() == 0) {
      int pid = do_sandbox_none(i, false);
      int status = 0;
      while (waitpid(pid, &status, __WALL) != pid) {
      }
      return 0;
    }
  }
  sleep(1000000);
  return 0;
}