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| author | Stefano Garzarella <sgarzare@redhat.com> | 2022-11-09 13:25:02 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-01-14 12:16:46 +0300 |
| commit | 264fb6dcbfde48e0686158dcebde89598685ba01 (patch) | |
| tree | 8e04d4e34d44565f98f003be9fc223d6aa460373 /drivers/vhost | |
| parent | eabb3ceb04cddbda22014059d29b8a27fc9607cb (diff) | |
| download | linux-264fb6dcbfde48e0686158dcebde89598685ba01.tar.xz | |
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@redhat.com>
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Message-Id: <20221109102503.18816-2-sgarzare@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/vhost')
| -rw-r--r-- | drivers/vhost/vringh.c | 5 |
1 files changed, 2 insertions, 3 deletions
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; |