tree 68f23011f566132ae1dc3351c30227d1f1b85dc0
parent d0e536d89395ecd8ab78fe999dc4d6f5d140ce46
author Eric Northup <digitaleric@google.com> 1446570233 +0100
committer Paolo Bonzini <pbonzini@redhat.com> 1447153584 +0100

KVM: x86: work around infinite loop in microcode when #AC is delivered

It was found that a guest can DoS a host by triggering an infinite
stream of "alignment check" (#AC) exceptions.  This causes the
microcode to enter an infinite loop where the core never receives
another interrupt.  The host kernel panics pretty quickly due to the
effects (CVE-2015-5307).

Signed-off-by: Eric Northup <digitaleric@google.com>
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>