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-rw-r--r--drivers/vhost/iotlb.c11
-rw-r--r--drivers/vhost/vdpa.c2
-rw-r--r--drivers/vhost/vhost.c9
3 files changed, 19 insertions, 3 deletions
diff --git a/drivers/vhost/iotlb.c b/drivers/vhost/iotlb.c
index 670d56c879e5..40b098320b2a 100644
--- a/drivers/vhost/iotlb.c
+++ b/drivers/vhost/iotlb.c
@@ -57,6 +57,17 @@ int vhost_iotlb_add_range_ctx(struct vhost_iotlb *iotlb,
if (last < start)
return -EFAULT;
+ /* If the range being mapped is [0, ULONG_MAX], split it into two entries
+ * otherwise its size would overflow u64.
+ */
+ if (start == 0 && last == ULONG_MAX) {
+ u64 mid = last / 2;
+
+ vhost_iotlb_add_range_ctx(iotlb, start, mid, addr, perm, opaque);
+ addr += mid + 1;
+ start = mid + 1;
+ }
+
if (iotlb->limit &&
iotlb->nmaps == iotlb->limit &&
iotlb->flags & VHOST_IOTLB_FLAG_RETIRE) {
diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index 851539807bc9..ec5249e8c32d 100644
--- a/drivers/vhost/vdpa.c
+++ b/drivers/vhost/vdpa.c
@@ -286,7 +286,7 @@ static long vhost_vdpa_set_features(struct vhost_vdpa *v, u64 __user *featurep)
if (copy_from_user(&features, featurep, sizeof(features)))
return -EFAULT;
- if (vdpa_set_features(vdpa, features, false))
+ if (vdpa_set_features(vdpa, features))
return -EINVAL;
return 0;
diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c
index 59edb5a1ffe2..082380c03a3e 100644
--- a/drivers/vhost/vhost.c
+++ b/drivers/vhost/vhost.c
@@ -1170,6 +1170,11 @@ ssize_t vhost_chr_write_iter(struct vhost_dev *dev,
goto done;
}
+ if (msg.size == 0) {
+ ret = -EINVAL;
+ goto done;
+ }
+
if (dev->msg_handler)
ret = dev->msg_handler(dev, &msg);
else
@@ -1981,7 +1986,7 @@ static int vhost_update_used_flags(struct vhost_virtqueue *vq)
return 0;
}
-static int vhost_update_avail_event(struct vhost_virtqueue *vq, u16 avail_event)
+static int vhost_update_avail_event(struct vhost_virtqueue *vq)
{
if (vhost_put_avail_event(vq))
return -EFAULT;
@@ -2527,7 +2532,7 @@ bool vhost_enable_notify(struct vhost_dev *dev, struct vhost_virtqueue *vq)
return false;
}
} else {
- r = vhost_update_avail_event(vq, vq->avail_idx);
+ r = vhost_update_avail_event(vq);
if (r) {
vq_err(vq, "Failed to update avail event index at %p: %d\n",
vhost_avail_event(vq), r);