On Fri, Mar 2, 2018 at 9:10 AM, Joerg Roedel <joro@xxxxxxxxxx> wrote: > 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? > As far as I'm concerned, I don't try to support kernel debugger users setting arbitrary breakpoints in the kernel entry text.
