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authorRadim Krčmář <rkrcmar@redhat.com>2016-08-12 13:01:51 +0300
committerRadim Krčmář <rkrcmar@redhat.com>2016-08-12 13:01:51 +0300
commit89a1d43ead15902b1f15768aa1121a2e2d5935af (patch)
treebd3a992b3d960de25e63fa133ba3a0a96d0e0591 /arch
parent9b731bcfdec4c159ad2e4312e25d69221709b96a (diff)
parentaca411a4b17a4aebe14ecdf253373db5b7ee6058 (diff)
downloadlinux-89a1d43ead15902b1f15768aa1121a2e2d5935af.tar.xz
Merge tag 'kvm-s390-master-4.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux
KVM: s390: Fixes for 4.8 (via kvm/master) Here are two fixes found by fuzzing of the ioctl interface. Both cases can trigger a WARN_ON_ONCE from user space.
Diffstat (limited to 'arch')
-rw-r--r--arch/s390/kvm/kvm-s390.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 3f3ae4865d57..f142215ed30d 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -1672,6 +1672,7 @@ int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
KVM_SYNC_CRS |
KVM_SYNC_ARCH0 |
KVM_SYNC_PFAULT;
+ kvm_s390_set_prefix(vcpu, 0);
if (test_kvm_facility(vcpu->kvm, 64))
vcpu->run->kvm_valid_regs |= KVM_SYNC_RICCB;
/* fprs can be synchronized via vrs, even if the guest has no vx. With
@@ -2361,8 +2362,10 @@ retry:
rc = gmap_mprotect_notify(vcpu->arch.gmap,
kvm_s390_get_prefix(vcpu),
PAGE_SIZE * 2, PROT_WRITE);
- if (rc)
+ if (rc) {
+ kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu);
return rc;
+ }
goto retry;
}