Re: my slab cache broken on sparc64

From: David S. Miller (davem@redhat.com)
Date: Fri May 03 2002 - 16:05:07 EST


   From: "Holzrichter, Bruce" <bruce.holzrichter@monster.com>
   Date: Fri, 3 May 2002 14:18:55 -0500

   I am trying to troubleshoot why in 2.5.13, (Though I also saw this in 2.5.7)
   on my UltraSparc, why my slabcache is broken. Has anyone else seen this?
   
The technique used by the slabcache to verify to pointer
is %100 non-portable and totally wrong.

get_user() MUST be used only on "user pointers", it is being
used on a kernel pointer here.

It would work if the access was surrounded by:

        old_fs = get_fs();
        set_fs(KERNEL_DS);
        ... get_user(kernel_pointer) ...
        set_fs (old_fs);

But it is not.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/



This archive was generated by hypermail 2b29 : Tue May 07 2002 - 22:00:21 EST