Re: [PATCH 1/3] x86/pv: Don't deliver #GP for a SYSENTER with NT set

2020-09-24 Thread Jan Beulich
On 23.09.2020 12:18, Andrew Cooper wrote: > It is a matter of guest kernel policy what to do with offending userspace, and > terminating said userspace may not be the action chosen. > > Linux explicitly tolerates this case. > > Reported-by: Andy Lutomirski > Fixes: fdac951560 ("x86: clear

[PATCH 1/3] x86/pv: Don't deliver #GP for a SYSENTER with NT set

2020-09-23 Thread Andrew Cooper
It is a matter of guest kernel policy what to do with offending userspace, and terminating said userspace may not be the action chosen. Linux explicitly tolerates this case. Reported-by: Andy Lutomirski Fixes: fdac951560 ("x86: clear EFLAGS.NT in SYSENTER entry path") Signed-off-by: Andrew