Re: [PATCH] Fix mmap_kmem (was: [question] What's the difference between /dev/kmem and /dev/mem)
From: Ingo Oeser
Date: Sat Aug 13 2005 - 04:58:52 EST
On Friday 12 August 2005 18:54, Andi Kleen wrote:
> Acessing vmalloc in /dev/mem would be pretty awkward. Yes it doesn't
> also work in mmap of /dev/kmem, but at least in read/write.
> There are quite a lot of scripts that use it for kernel debugging
> like dumping variables. And for that you really want to access modules
> and vmalloc. And it's much easier to parse than /proc/kcore
Perfect! So it should be under CONFIG_DEBUG_KERNEL and default to off.
So you can still debug and we raise the bar higher for rootkits,
if they are the only other user.
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