Re: [RFC][PATCH] tracing, printk: Force no hashing when trace_printk() is used

[Peter Zijlstra]

On Tue, Apr 03, 2018 at 05:06:12PM -0400, Steven Rostedt wrote:
> If you are concerned about attack surface, I could make it a bit more
> difficult to tweak by malicious software. What about the patch below?
> It would be much more difficult to modify this knob from an attack
> vector.

Not if you build using clang, because that doesn't support asm-goto and
thus falls back to a simple runtime variable, which is exactly what Kees
didn't want.