[PATCH] vdpa/mlx5: Fix pointer math in mlx5_vdpa_get_config()
From: Dan Carpenter <hidden>
Date: 2020-08-08 09:34:57
Also in:
kernel-janitors, lkml
Subsystem:
mellanox mlx5 vdpa driver, the rest, virtio core · Maintainers:
Dragos Tatulea, Linus Torvalds, "Michael S. Tsirkin", Jason Wang
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: 1a86b377aa21 ("vdpa/mlx5: Add VDPA driver for supported mlx5 devices")
Signed-off-by: Dan Carpenter <redacted>
---
drivers/vdpa/mlx5/net/mlx5_vnet.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/vdpa/mlx5/net/mlx5_vnet.c b/drivers/vdpa/mlx5/net/mlx5_vnet.c
index 3ec44a4f0e45..9d1637cf772e 100644
--- a/drivers/vdpa/mlx5/net/mlx5_vnet.c
+++ b/drivers/vdpa/mlx5/net/mlx5_vnet.c@@ -1758,7 +1758,7 @@ 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,
--
2.27.0
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