diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2015-07-04 11:29:59 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-07-04 11:29:59 -0700 |
| commit | 1b3618b60a487fa219c5381a9c983a00c40e6477 (patch) | |
| tree | 8aa708adba69aa30d5b65a0734a17e0668c3506b /drivers | |
| parent | 14a6f1989dae9445d4532941bdd6bbad84f4c8da (diff) | |
| parent | a88464a8b0ffb2f8dfb69d3ab982169578b50f22 (diff) | |
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull kvm fixes from Paolo Bonzini:
"Except for the preempt notifiers fix, these are all small bugfixes
that could have been waited for -rc2. Sending them now since I was
taking care of Peter's patch anyway"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
kvm: add hyper-v crash msrs values
KVM: x86: remove data variable from kvm_get_msr_common
KVM: s390: virtio-ccw: don't overwrite config space values
KVM: x86: keep track of LVT0 changes under APICv
KVM: x86: properly restore LVT0
KVM: x86: make vapics_in_nmi_mode atomic
sched, preempt_notifier: separate notifier registration from static_key inc/dec
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/s390/kvm/virtio_ccw.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/s390/kvm/virtio_ccw.c b/drivers/s390/kvm/virtio_ccw.c index 6f1fa1773e76..f8d8fdb26b72 100644 --- a/drivers/s390/kvm/virtio_ccw.c +++ b/drivers/s390/kvm/virtio_ccw.c @@ -65,6 +65,7 @@ struct virtio_ccw_device { bool is_thinint; bool going_away; bool device_lost; + unsigned int config_ready; void *airq_info; }; @@ -833,8 +834,11 @@ static void virtio_ccw_get_config(struct virtio_device *vdev, if (ret) goto out_free; - memcpy(vcdev->config, config_area, sizeof(vcdev->config)); - memcpy(buf, &vcdev->config[offset], len); + memcpy(vcdev->config, config_area, offset + len); + if (buf) + memcpy(buf, &vcdev->config[offset], len); + if (vcdev->config_ready < offset + len) + vcdev->config_ready = offset + len; out_free: kfree(config_area); @@ -857,6 +861,9 @@ static void virtio_ccw_set_config(struct virtio_device *vdev, if (!config_area) goto out_free; + /* Make sure we don't overwrite fields. */ + if (vcdev->config_ready < offset) + virtio_ccw_get_config(vdev, 0, NULL, offset); memcpy(&vcdev->config[offset], buf, len); /* Write the config area to the host. */ memcpy(config_area, vcdev->config, sizeof(vcdev->config)); |