On 16/10/2020 12:55, Jan Beulich wrote: > On 16.10.2020 13:24, Andrew Cooper wrote: >> On a tangent, what are your views WRT backport beyond 4.14? >> >> Back then, it was #DB which was adjacent to the guard frame (which was >> not present), but it doesn't use show_registers() by default, so I think >> the problem is mostly hidden. > I wasn't fully decided yet, but as long as it applies reasonably > cleanly I think I'm leaning towards also putting it on 4.13. > 4.12 closes anyway once 4.12.4 is out, and I don't think I want > to pick up not-really-urgent changes for putting there beyond > the few ones that I already have (and that I mean to put in > alongside the XSA fixes on Tuesday); I could be talked into it, > though.
The question I was asking was really "should I try and make an equivalent fix for 4.13 and older". While the base premise of the fix would be the same, the logic in load_system_tables() is different, and the commit message is completely wrong. I only encountered this problem with added instrumentation in the #DB handler, which is why I'm questioning the utility of going to this effort. ~Andrew
