On Wed, Apr 4, 2018 at 12:49 AM, Peter Zijlstra <pet...@infradead.org> wrote: > 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.
Nah, Clang will get asm-goto soon. I'm not worried about that. Besides the "yay new target issue", I was concerned about Linus yelling about seeing the knob added he specifically said he didn't want. :P -Kees -- Kees Cook Pixel Security