[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH] VMX: don't allow PVH to reach handle_pio() or handle_mmio()
PVH guests are not supposed to access I/O ports they weren't given access to (there's nothing to handle emulation of such accesses). Reported-by: Roger Pau MonnÃ<roger.pau@xxxxxxxxxx> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx> --- Note: Only compile tested so far. --- a/xen/arch/x86/hvm/vmx/vmx.c +++ b/xen/arch/x86/hvm/vmx/vmx.c @@ -3082,6 +3082,9 @@ void vmx_vmexit_handler(struct cpu_user_ } case EXIT_REASON_IO_INSTRUCTION: + if ( unlikely(is_pvh_vcpu(v)) ) + goto exit_and_crash; + __vmread(EXIT_QUALIFICATION, &exit_qualification); if ( exit_qualification & 0x10 ) { Attachment:
VMX-PVH-no-emulated-IO-ports.patch _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
|
Lists.xenproject.org is hosted with RackSpace, monitoring our |