Date: Sat, 15 Jan 2005 23:01:51 +0100
From: Andi Kleen <ak@suse.de>
To: linux-kernel@vger.kernel.org, Andi Kleen <ak@suse.de>
Subject: Re: slab.c use of __get_user and sparse
Message-ID: <20050115220151.GA16442@wotan.suse.de>
References: <20050115213906.GA22486@mars.ravnborg.org>
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> Based on the comment it is understood that suddenly this pointer points
> to userspace, because the module got unloaded.
> I wonder why we can rely on the same address now the module got unloaded -
> we may risk this virtual address is taken over by someone else?

The address is not user space; you would be lying.

Perhaps it's best to get rid of the hack completely. Turn kmem_cache_t->name
into an array and copy the name instead of storing the pointer, then
it wouldn't be needed at all.

-Andi
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