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authorStefano Garzarella <sgarzare@redhat.com>2021-02-08 17:17:41 +0100
committerMichael S. Tsirkin <mst@redhat.com>2021-02-23 07:52:59 -0500
commitdcfde1635e764fd69cc756c7780d144e288608e9 (patch)
treef637233c413970255debeb9b007f647ffa03b6da /drivers/vdpa/mlx5/net
parent95efabf077babf09ea148f941729e953ac185d8a (diff)
downloadlinux-dcfde1635e764fd69cc756c7780d144e288608e9.tar.bz2
vdpa/mlx5: fix param validation in mlx5_vdpa_get_config()
It's legal to have 'offset + len' equal to sizeof(struct virtio_net_config), since 'ndev->config' is a 'struct virtio_net_config', so we can safely copy its content under this condition. Fixes: 1a86b377aa21 ("vdpa/mlx5: Add VDPA driver for supported mlx5 devices") Cc: stable@vger.kernel.org Signed-off-by: Stefano Garzarella <sgarzare@redhat.com> Link: https://lore.kernel.org/r/20210208161741.104939-1-sgarzare@redhat.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Jason Wang <jasowang@redhat.com> Acked-by: Eli Cohen <elic@nvidia.com>
Diffstat (limited to 'drivers/vdpa/mlx5/net')
-rw-r--r--drivers/vdpa/mlx5/net/mlx5_vnet.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/vdpa/mlx5/net/mlx5_vnet.c b/drivers/vdpa/mlx5/net/mlx5_vnet.c
index dc88559a8d49..10e9b09932eb 100644
--- a/drivers/vdpa/mlx5/net/mlx5_vnet.c
+++ b/drivers/vdpa/mlx5/net/mlx5_vnet.c
@@ -1820,7 +1820,7 @@ static void mlx5_vdpa_get_config(struct vdpa_device *vdev, unsigned int offset,
struct mlx5_vdpa_dev *mvdev = to_mvdev(vdev);
struct mlx5_vdpa_net *ndev = to_mlx5_vdpa_ndev(mvdev);
- if (offset + len < sizeof(struct virtio_net_config))
+ if (offset + len <= sizeof(struct virtio_net_config))
memcpy(buf, (u8 *)&ndev->config + offset, len);
}