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vdpa/mlx5: Fix pointer math in mlx5_vdpa_get_config()

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There is a pointer math bug here so if "offset" is non-zero then this
will copy memory from beyond the end of the array.

Fixes: 1a86b377aa ("vdpa/mlx5: Add VDPA driver for supported mlx5 devices")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/20200808093241.GB115053@mwanda
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Eli Cohen <elic@nvidia.com>
Cc: Jason Wang <jasowang@redhat.com>; Parav Pandit <parav@mellanox.com>; virtualization@lists.linux-foundation.org; linux-kernel@vger.kernel.org; kernel-janitors@vger.kernel.org
Fixes: 1a86b377aa ("vdpa/mlx5: Add VDPA driver for supported mlx5 devices")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
This commit is contained in:
Dan Carpenter 2020-08-08 12:32:41 +03:00 committed by Michael S. Tsirkin
parent f31231bf26
commit 2874211fcd
1 changed files with 1 additions and 1 deletions
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2
drivers/vdpa/mlx5/net/mlx5_vnet.c
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@ -1757,7 +1757,7 @@ static void mlx5_vdpa_get_config(struct vdpa_device *vdev, unsigned int offset,
struct mlx5_vdpa_net *ndev = to_mlx5_vdpa_ndev(mvdev);
if (offset + len < sizeof(struct virtio_net_config))
memcpy(buf, &ndev->config + offset, len);
memcpy(buf, (u8 *)&ndev->config + offset, len);
}
static void mlx5_vdpa_set_config(struct vdpa_device *vdev, unsigned int offset, const void *buf,