On Mon, 7 Sep 2020 08:47:00 -0400
Janosch Frank <frankja@xxxxxxxxxxxxx> wrote:
> Program exception 3f (secure storage violation) can only be detected
> when the CPU is running in SIE with a format 4 state description,
> e.g. running a protected guest. Because of this and because user
> space partly controls the guest memory mapping and can trigger this
> exception, we want to send a SIGSEGV to the process running the guest
> and not panic the kernel.
>
> Signed-off-by: Janosch Frank <frankja@xxxxxxxxxxxxx>
> CC: <stable@xxxxxxxxxxxxxxx> # 5.7+
> Fixes: 084ea4d611a3 ("s390/mm: add (non)secure page access exceptions handlers")
> Reviewed-by: Claudio Imbrenda <imbrenda@xxxxxxxxxxxxx>
> Acked-by: Christian Borntraeger <borntraeger@xxxxxxxxxx>
> ---
> arch/s390/kernel/pgm_check.S | 2 +-
> arch/s390/mm/fault.c | 20 ++++++++++++++++++++
> 2 files changed, 21 insertions(+), 1 deletion(-)
Reviewed-by: Cornelia Huck <cohuck@xxxxxxxxxx>
