This is a note to let you know that I've just added the patch titled
vringh: fix range used in iotlb_translate()
to the 5.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
vringh-fix-range-used-in-iotlb_translate.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit dbaecb214467cc40fbbb4ca94799671c27766dab
Author: Stefano Garzarella <sgarzare@xxxxxxxxxx>
Date: Wed Nov 9 11:25:02 2022 +0100
vringh: fix range used in iotlb_translate()
[ Upstream commit f85efa9b0f5381874f727bd98f56787840313f0b ]
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@xxxxxxxxxx>
Signed-off-by: Stefano Garzarella <sgarzare@xxxxxxxxxx>
Message-Id: <20221109102503.18816-2-sgarzare@xxxxxxxxxx>
Signed-off-by: Michael S. Tsirkin <mst@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/vhost/vringh.c b/drivers/vhost/vringh.c
index 5a0340c85dc6..48f4ec2ba40a 100644
--- a/drivers/vhost/vringh.c
+++ b/drivers/vhost/vringh.c
@@ -1077,7 +1077,7 @@ 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;
while (len > s) {
u64 size, pa, pfn;
@@ -1087,8 +1087,7 @@ 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;
