Re: [PATCH] Prevent NULL pointer deref in grab_swap_token

[Christoph Hellwig]

On Tue, Mar 07, 2006 at 03:13:44PM -0600, Dean Roe wrote:
> grab_swap_token() assumes that the current process has an mm struct,
> which is not true for kernel threads invoking get_user_pages().  Since
> this should be extremely rare, just return from grab_swap_token()
> without doing anything.

There's a few things that will break if a kernel thread calls
get_user_pages, so we should rather fix those.

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