On Thu, 2022-12-01 at 19:44 +0100, Thomas Huth wrote: > The SET ADDRESS SPACE CONTROL FAST instruction is not privileged, it > can be > used from problem space, too. Just the switching to the home address > space > is privileged and should still generate a privilege exception. This > bug is > e.g. causing programs like Java that use the "getcpu" vdso kernel > function > to crash (see > https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=990417#26 ). > > While we're at it, also check if DAT is not enabled. In that case the > instruction is supposed to generate a special operation exception. > > Resolves: https://gitlab.com/qemu-project/qemu/-/issues/655 > Signed-off-by: Thomas Huth <th...@redhat.com> > --- > target/s390x/tcg/insn-data.h.inc | 2 +- > target/s390x/tcg/cc_helper.c | 7 +++++++ > 2 files changed, 8 insertions(+), 1 deletion(-)
Reviewed-by: Ilya Leoshkevich <i...@linux.ibm.com>
