[PATCH 26/30] Lock down ftrace

Jiri Kosina [off-list ref] wrote:

quoted

The idea is to prevent cryptographic data for filesystems and other things
from being read out of the kernel memory as well as to prevent unauthorised
modification of kernel memory.

Then it would make sense to actually lock down dumping of registers / 
function arguments (kprobes can currently do that, ftrace eventually could 
as well I guess), but disabling the whole ftrace altogether seems like a 
totally unnecessary overkill.

That would be fine by me.  I have a patch that locks down kprobes in this
series.  Steven says that ftrace might acquire the ability to dump registers
in the future.

David
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