From mboxrd@z Thu Jan  1 00:00:00 1970
From: revolver@nm.ru (revolver)
Date: Thu, 08 Mar 2012 14:05:20 +0400
Subject: crash in virt_to_pages
Message-ID: <d8aacdbcb1b64a81d339195c37df4106083710d8@mail.qip.ru>
To: kernelnewbies@lists.kernelnewbies.org
List-Id: kernelnewbies.lists.kernelnewbies.org


Hi,

I am trying to solve crash on old patched 2.6.18 kernel
where virt_to_page() used on stack variable address.

function() {

   struct {
      u32 ...
      u32 ...
      ...
   } bla;

   ... = virt_to_page(&amp;bla);
}

 i386 it works fine but x86_64 kernl panics.
When kernel panics, &amp;bla is something like ffffffff80574d40,
which is not valid for virt_to_pages, AFAIK.

Any ideas?
Why it is not save to use virt_to_pages on stack addresses?

Thank you