syzkaller-repros/linux/b53aed2f936728226c331a4dc0b4f89d742fda9c.c

// KASAN: slab-out-of-bounds Write in setup_udp_tunnel_sock (2)
// https://syzkaller.appspot.com/bug?id=b53aed2f936728226c331a4dc0b4f89d742fda9c
// status:open
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <endian.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <unistd.h>

uint64_t r[2] = {0xffffffffffffffff, 0xffffffffffffffff};

int main(void)
{
  syscall(__NR_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x32ul, -1, 0);
  intptr_t res = 0;
  res = syscall(__NR_socket, 0x10ul, 3ul, 0ul);
  if (res != -1)
    r[0] = res;
  res = syscall(__NR_socket, 2ul, 3ul, 0x11);
  if (res != -1)
    r[1] = res;
  *(uint64_t*)0x20000100 = 0;
  *(uint32_t*)0x20000108 = 0;
  *(uint64_t*)0x20000110 = 0x20000000;
  *(uint64_t*)0x20000000 = 0x20000140;
  memcpy((void*)0x20000140, "\x58\x00\x00\x00\x10\x00\x01\x05\x00\x00\x00\x00"
                            "\x00\x00\x00\x00\x00\x00\x00\x00",
         20);
  *(uint32_t*)0x20000154 = 0;
  memcpy((void*)0x20000158, "\x00\x00\x00\x00\x00\x00\x00\x00\x38\x00\x12\x00"
                            "\x08\x00\x01\x00\x67\x74\x70\x00\x2c\x00\x02\x00"
                            "\x08\x00\x01\x00",
         28);
  *(uint32_t*)0x20000174 = -1;
  memcpy((void*)0x20000178, "\x08\x00\x02\x00", 4);
  *(uint32_t*)0x2000017c = -1;
  memcpy((void*)0x20000180, "\x08\x00\x01\x00", 4);
  *(uint32_t*)0x20000184 = r[1];
  memcpy((void*)0x20000188, "\x08\x00\x02\x00", 4);
  *(uint32_t*)0x2000018c = -1;
  memcpy((void*)0x20000190,
         "\x08\x00\xa2\x30\xf0\xe7\x7b\x23\x1e\x90\x76\xee\xa5\x71\x23\x02\x00",
         17);
  *(uint32_t*)0x200001a1 = -1;
  *(uint64_t*)0x20000008 = 0x58;
  *(uint64_t*)0x20000118 = 1;
  *(uint64_t*)0x20000120 = 0;
  *(uint64_t*)0x20000128 = 0;
  *(uint32_t*)0x20000130 = 0;
  syscall(__NR_sendmsg, r[0], 0x20000100ul, 0ul);
  return 0;
}