Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > linux.kernel > #1525050
| From | Jason Wang <jasowang@redhat.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH 2/2] vhost: forbid IOTLB invalidation when not enabled |
| Date | 2016-11-18 09:00 +0100 |
| Message-ID | <sEMfv-49Z-5@gated-at.bofh.it> (permalink) |
| References | <sEMfv-49Z-7@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
When IOTLB is not enabled, we should forbid IOTLB invalidation to
avoid a NULL pointer dereference.
Signed-off-by: Jason Wang <jasowang@redhat.com>
---
drivers/vhost/vhost.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c
index c6f2d89..7d338d5 100644
--- a/drivers/vhost/vhost.c
+++ b/drivers/vhost/vhost.c
@@ -959,6 +959,10 @@ int vhost_process_iotlb_msg(struct vhost_dev *dev,
vhost_iotlb_notify_vq(dev, msg);
break;
case VHOST_IOTLB_INVALIDATE:
+ if (!dev->iotlb) {
+ ret = -EFAULT;
+ break;
+ }
vhost_del_umem_range(dev->iotlb, msg->iova,
msg->iova + msg->size - 1);
break;
--
2.7.4
Back to linux.kernel | Previous | Next | Find similar | Unroll thread
[PATCH 2/2] vhost: forbid IOTLB invalidation when not enabled Jason Wang <jasowang@redhat.com> - 2016-11-18 09:00 +0100
csiph-web