[PATCH] gve: replace kfree with kvfree

[PATCH] gve: replace kfree with kvfree

[Chuhong Yuan]

Variables allocated by kvzalloc should not be freed by kfree.
Because they may be allocated by vmalloc.
So we replace kfree with kvfree here.

Signed-off-by: Chuhong Yuan <hslester96@gmail.com>
---
 drivers/net/ethernet/google/gve/gve_main.c | 22 +++++++++++-----------
 drivers/net/ethernet/google/gve/gve_rx.c   |  4 ++--
 2 files changed, 13 insertions(+), 13 deletions(-)

diff --git a/drivers/net/ethernet/google/gve/gve_main.c b/drivers/net/ethernet/google/gve/gve_main.c
index 24f16e3368cd..10b8e9720c32 100644
--- a/drivers/net/ethernet/google/gve/gve_main.c
+++ b/drivers/net/ethernet/google/gve/gve_main.c
@@ -232,7 +232,7 @@ static int gve_alloc_notify_blocks(struct gve_priv *priv)
 abort_with_msix_enabled:
 	pci_disable_msix(priv->pdev);
 abort_with_msix_vectors:
-	kfree(priv->msix_vectors);
+	kvfree(priv->msix_vectors);
 	priv->msix_vectors = NULL;
 	return err;
 }
@@ -256,7 +256,7 @@ static void gve_free_notify_blocks(struct gve_priv *priv)
 	priv->ntfy_blocks = NULL;
 	free_irq(priv->msix_vectors[priv->mgmt_msix_idx].vector, priv);
 	pci_disable_msix(priv->pdev);
-	kfree(priv->msix_vectors);
+	kvfree(priv->msix_vectors);
 	priv->msix_vectors = NULL;
 }
 
@@ -445,12 +445,12 @@ static int gve_alloc_rings(struct gve_priv *priv)
 	return 0;
 
 free_rx:
-	kfree(priv->rx);
+	kvfree(priv->rx);
 	priv->rx = NULL;
 free_tx_queue:
 	gve_tx_free_rings(priv);
 free_tx:
-	kfree(priv->tx);
+	kvfree(priv->tx);
 	priv->tx = NULL;
 	return err;
 }
@@ -500,7 +500,7 @@ static void gve_free_rings(struct gve_priv *priv)
 			gve_remove_napi(priv, ntfy_idx);
 		}
 		gve_tx_free_rings(priv);
-		kfree(priv->tx);
+		kvfree(priv->tx);
 		priv->tx = NULL;
 	}
 	if (priv->rx) {
@@ -509,7 +509,7 @@ static void gve_free_rings(struct gve_priv *priv)
 			gve_remove_napi(priv, ntfy_idx);
 		}
 		gve_rx_free_rings(priv);
-		kfree(priv->rx);
+		kvfree(priv->rx);
 		priv->rx = NULL;
 	}
 }
@@ -592,9 +592,9 @@ static void gve_free_queue_page_list(struct gve_priv *priv,
 		gve_free_page(&priv->pdev->dev, qpl->pages[i],
 			      qpl->page_buses[i], gve_qpl_dma_dir(priv, id));
 
-	kfree(qpl->page_buses);
+	kvfree(qpl->page_buses);
 free_pages:
-	kfree(qpl->pages);
+	kvfree(qpl->pages);
 	priv->num_registered_pages -= qpl->num_entries;
 }
 
@@ -635,7 +635,7 @@ static int gve_alloc_qpls(struct gve_priv *priv)
 free_qpls:
 	for (j = 0; j <= i; j++)
 		gve_free_queue_page_list(priv, j);
-	kfree(priv->qpls);
+	kvfree(priv->qpls);
 	return err;
 }
 
@@ -644,12 +644,12 @@ static void gve_free_qpls(struct gve_priv *priv)
 	int num_qpls = gve_num_tx_qpls(priv) + gve_num_rx_qpls(priv);
 	int i;
 
-	kfree(priv->qpl_cfg.qpl_id_map);
+	kvfree(priv->qpl_cfg.qpl_id_map);
 
 	for (i = 0; i < num_qpls; i++)
 		gve_free_queue_page_list(priv, i);
 
-	kfree(priv->qpls);
+	kvfree(priv->qpls);
 }
 
 /* Use this to schedule a reset when the device is capable of continuing
diff --git a/drivers/net/ethernet/google/gve/gve_rx.c b/drivers/net/ethernet/google/gve/gve_rx.c
index c1aeabd1c594..1914b8350da7 100644
--- a/drivers/net/ethernet/google/gve/gve_rx.c
+++ b/drivers/net/ethernet/google/gve/gve_rx.c
@@ -35,7 +35,7 @@ static void gve_rx_free_ring(struct gve_priv *priv, int idx)
 
 	gve_unassign_qpl(priv, rx->data.qpl->id);
 	rx->data.qpl = NULL;
-	kfree(rx->data.page_info);
+	kvfree(rx->data.page_info);
 
 	slots = rx->data.mask + 1;
 	bytes = sizeof(*rx->data.data_ring) * slots;
@@ -168,7 +168,7 @@ static int gve_rx_alloc_ring(struct gve_priv *priv, int idx)
 			  rx->q_resources, rx->q_resources_bus);
 	rx->q_resources = NULL;
 abort_filled:
-	kfree(rx->data.page_info);
+	kvfree(rx->data.page_info);
 abort_with_slots:
 	bytes = sizeof(*rx->data.data_ring) * slots;
 	dma_free_coherent(hdev, bytes, rx->data.data_ring, rx->data.data_bus);
-- 
2.20.1

Re: [PATCH] gve: replace kfree with kvfree

[Catherine Sullivan]

On Thu, Jul 18, 2019 at 4:32 PM David Miller <davem@davemloft.net> wrote:
>
> From: Chuhong YUAN <chuhongyuan@outlook.com>
> Date: Wed, 17 Jul 2019 00:59:02 +0000
>
> > Variables allocated by kvzalloc should not be freed by kfree.
> > Because they may be allocated by vmalloc.
> > So we replace kfree with kvfree here.
> >
> > Signed-off-by: Chuhong Yuan <chuhongyuan@outlook.com>
>
> Applied, thanks Chuhong.
>
> GVE maintainers, you are upstream now and have to stay on top of review
> of changes like this.  Otherwise I'll just review it myself and apply
> it unless I find problems, and that may not be what you want :)

Will do, thanks for the review. And thanks for the fix Chuhong.

Re: [PATCH] gve: replace kfree with kvfree

[David Miller]

From: Chuhong YUAN <chuhongyuan@outlook.com>
Date: Wed, 17 Jul 2019 00:59:02 +0000

> Variables allocated by kvzalloc should not be freed by kfree.
> Because they may be allocated by vmalloc.
> So we replace kfree with kvfree here.
> 
> Signed-off-by: Chuhong Yuan <chuhongyuan@outlook.com>

Applied, thanks Chuhong.

GVE maintainers, you are upstream now and have to stay on top of review
of changes like this.  Otherwise I'll just review it myself and apply
it unless I find problems, and that may not be what you want :)