6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Philo Lu <lulie@xxxxxxxxxxxxxxxxx>
[ Upstream commit 3f7d9c1964fcd16d02a8a9d4fd6f6cb60c4cc530 ]
Add hash_key_length check in virtnet_probe() to avoid possible out of
bound errors when setting/reading the hash key.
Fixes: c7114b1249fa ("drivers/net/virtio_net: Added basic RSS support.")
Signed-off-by: Philo Lu <lulie@xxxxxxxxxxxxxxxxx>
Signed-off-by: Xuan Zhuo <xuanzhuo@xxxxxxxxxxxxxxxxx>
Acked-by: Joe Damato <jdamato@xxxxxxxxxx>
Acked-by: Michael S. Tsirkin <mst@xxxxxxxxxx>
Signed-off-by: Paolo Abeni <pabeni@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/net/virtio_net.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 2da3be3fb9423..426c05d5b1381 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -4549,6 +4549,12 @@ static int virtnet_probe(struct virtio_device *vdev)
if (vi->has_rss || vi->has_rss_hash_report) {
vi->rss_key_size =
virtio_cread8(vdev, offsetof(struct virtio_net_config, rss_max_key_size));
+ if (vi->rss_key_size > VIRTIO_NET_RSS_MAX_KEY_SIZE) {
+ dev_err(&vdev->dev, "rss_max_key_size=%u exceeds the limit %u.\n",
+ vi->rss_key_size, VIRTIO_NET_RSS_MAX_KEY_SIZE);
+ err = -EINVAL;
+ goto free;
+ }
vi->rss_hash_types_supported =
virtio_cread32(vdev, offsetof(struct virtio_net_config, supported_hash_types));
--
2.43.0
