mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-05 18:14:07 +08:00
KVM: s390: Disallow invalid bits in kvm_valid_regs and kvm_dirty_regs
If unknown bits are set in kvm_valid_regs or kvm_dirty_regs, this clearly indicates that something went wrong in the KVM userspace application. The x86 variant of KVM already contains a check for bad bits, so let's do the same on s390x now, too. Reviewed-by: Janosch Frank <frankja@linux.ibm.com> Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Thomas Huth <thuth@redhat.com> Link: https://lore.kernel.org/lkml/20190904085200.29021-2-thuth@redhat.com/ Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
This commit is contained in:
parent
be6f55a60d
commit
200824f55e
@ -231,6 +231,12 @@ struct kvm_guest_debug_arch {
|
||||
#define KVM_SYNC_GSCB (1UL << 9)
|
||||
#define KVM_SYNC_BPBC (1UL << 10)
|
||||
#define KVM_SYNC_ETOKEN (1UL << 11)
|
||||
|
||||
#define KVM_SYNC_S390_VALID_FIELDS \
|
||||
(KVM_SYNC_PREFIX | KVM_SYNC_GPRS | KVM_SYNC_ACRS | KVM_SYNC_CRS | \
|
||||
KVM_SYNC_ARCH0 | KVM_SYNC_PFAULT | KVM_SYNC_VRS | KVM_SYNC_RICCB | \
|
||||
KVM_SYNC_FPRS | KVM_SYNC_GSCB | KVM_SYNC_BPBC | KVM_SYNC_ETOKEN)
|
||||
|
||||
/* length and alignment of the sdnx as a power of two */
|
||||
#define SDNXC 8
|
||||
#define SDNXL (1UL << SDNXC)
|
||||
|
@ -4008,6 +4008,10 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
|
||||
if (kvm_run->immediate_exit)
|
||||
return -EINTR;
|
||||
|
||||
if (kvm_run->kvm_valid_regs & ~KVM_SYNC_S390_VALID_FIELDS ||
|
||||
kvm_run->kvm_dirty_regs & ~KVM_SYNC_S390_VALID_FIELDS)
|
||||
return -EINVAL;
|
||||
|
||||
vcpu_load(vcpu);
|
||||
|
||||
if (guestdbg_exit_pending(vcpu)) {
|
||||
|
Loading…
Reference in New Issue
Block a user