| Message ID | 20221109102503.18816-2-sgarzare@redhat.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
| Series | vhost: fix ranges when call vhost_iotlb_itree_first() | expand |
| Context | Check | Description |
|---|---|---|
| netdev/tree_selection | success | Not a local patch |
diff --git a/drivers/vhost/vringh.c b/drivers/vhost/vringh.c index 11f59dd06a74..828c29306565 100644 --- a/drivers/vhost/vringh.c +++ b/drivers/vhost/vringh.c @@ -1102,7 +1102,7 @@ static int iotlb_translate(const struct vringh *vrh, struct vhost_iotlb_map *map; struct vhost_iotlb *iotlb = vrh->iotlb; int ret = 0; - u64 s = 0; + u64 s = 0, last = addr + len - 1; spin_lock(vrh->iotlb_lock); @@ -1114,8 +1114,7 @@ static int iotlb_translate(const struct vringh *vrh, break; } - map = vhost_iotlb_itree_first(iotlb, addr, - addr + len - 1); + map = vhost_iotlb_itree_first(iotlb, addr, last); if (!map || map->start > addr) { ret = -EINVAL; break;
vhost_iotlb_itree_first() requires `start` and `last` parameters to search for a mapping that overlaps the range. In iotlb_translate() we cyclically call vhost_iotlb_itree_first(), incrementing `addr` by the amount already translated, so rightly we move the `start` parameter passed to vhost_iotlb_itree_first(), but we should hold the `last` parameter constant. Let's fix it by saving the `last` parameter value before incrementing `addr` in the loop. Fixes: 9ad9c49cfe97 ("vringh: IOTLB support") Acked-by: Jason Wang <jasowang@redhat.com> Signed-off-by: Stefano Garzarella <sgarzare@redhat.com> --- drivers/vhost/vringh.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-)