diff options
| -rw-r--r-- | arch/x86/kvm/x86.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index e07b243..814e72a 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -230,7 +230,7 @@ unsigned long segment_base(u16 selector) unsigned long table_base; unsigned long v; - if (selector == 0) + if (!(selector & ~3)) return 0; native_store_gdt(&gdt); @@ -239,6 +239,8 @@ unsigned long segment_base(u16 selector) if (selector & 4) { /* from ldt */ u16 ldt_selector = kvm_read_ldt(); + if (!(ldt_selector & ~3)) + return 0; table_base = segment_base(ldt_selector); } d = (struct desc_struct *)(table_base + (selector & ~7)); |