On Thu, Mar 01, 2018 at 10:38:21AM -0800, Linus Torvalds wrote: > Note that debug traps can happen regardless of TF, Think kgdb etc. > Arguably kgdb users get what they deserve, but still.. I think root > can set kernel breakpoints too.
But that seems to be broken right now at least wrt. to the espfix code where there is no handling for in the #DB handler. Can userspace really set arbitrary kernel breakpoints? Joerg