* [PATCH] net: gemini: Fix memory leak in gmac_setup_txqs
@ 2019-12-15 1:10 Navid Emamdoost
2019-12-15 14:27 ` Markus Elfring
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: Navid Emamdoost @ 2019-12-15 1:10 UTC (permalink / raw)
To: Hans Ulli Kroll, Linus Walleij, David S. Miller,
Michał Mirosław, linux-arm-kernel, netdev,
linux-kernel
Cc: emamd001, Navid Emamdoost
In the implementation of gmac_setup_txqs() the allocated desc_ring is
leaked if TX queue base is not aligned. Release it via
dma_free_coherent.
Fixes: 4d5ae32f5e1e ("net: ethernet: Add a driver for Gemini gigabit ethernet")
Signed-off-by: Navid Emamdoost <navid.emamdoost@gmail.com>
---
drivers/net/ethernet/cortina/gemini.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/net/ethernet/cortina/gemini.c b/drivers/net/ethernet/cortina/gemini.c
index a8f4c69252ff..3a796fe099dd 100644
--- a/drivers/net/ethernet/cortina/gemini.c
+++ b/drivers/net/ethernet/cortina/gemini.c
@@ -576,6 +576,8 @@ static int gmac_setup_txqs(struct net_device *netdev)
if (port->txq_dma_base & ~DMA_Q_BASE_MASK) {
dev_warn(geth->dev, "TX queue base is not aligned\n");
+ dma_free_coherent(geth->dev, len * sizeof(*desc_ring),
+ desc_ring, port->txq_dma_base);
kfree(skb_tab);
return -ENOMEM;
}
--
2.17.1
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH] net: gemini: Fix memory leak in gmac_setup_txqs
2019-12-15 1:10 [PATCH] net: gemini: Fix memory leak in gmac_setup_txqs Navid Emamdoost
@ 2019-12-15 14:27 ` Markus Elfring
2019-12-16 10:20 ` Linus Walleij
2019-12-17 0:27 ` David Miller
2 siblings, 0 replies; 4+ messages in thread
From: Markus Elfring @ 2019-12-15 14:27 UTC (permalink / raw)
To: Navid Emamdoost, linux-arm-kernel, netdev
Cc: linux-kernel, kernel-janitors, David S. Miller, Linus Walleij,
Michał Mirosław, Navid Emamdoost, Hans Ulli Kroll
> +++ b/drivers/net/ethernet/cortina/gemini.c
> @@ -576,6 +576,8 @@ static int gmac_setup_txqs(struct net_device *netdev)
>
> if (port->txq_dma_base & ~DMA_Q_BASE_MASK) {
> dev_warn(geth->dev, "TX queue base is not aligned\n");
> + dma_free_coherent(geth->dev, len * sizeof(*desc_ring),
> + desc_ring, port->txq_dma_base);
> kfree(skb_tab);
> return -ENOMEM;
> }
The added function call seems to be fine.
Would you like to avoid a bit of duplicate code for the exception handling?
Regards,
Markus
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] net: gemini: Fix memory leak in gmac_setup_txqs
2019-12-15 1:10 [PATCH] net: gemini: Fix memory leak in gmac_setup_txqs Navid Emamdoost
2019-12-15 14:27 ` Markus Elfring
@ 2019-12-16 10:20 ` Linus Walleij
2019-12-17 0:27 ` David Miller
2 siblings, 0 replies; 4+ messages in thread
From: Linus Walleij @ 2019-12-16 10:20 UTC (permalink / raw)
To: Navid Emamdoost
Cc: Hans Ulli Kroll, David S. Miller, Michał Mirosław,
Linux ARM, netdev, linux-kernel, emamd001
On Sun, Dec 15, 2019 at 2:11 AM Navid Emamdoost
<navid.emamdoost@gmail.com> wrote:
> In the implementation of gmac_setup_txqs() the allocated desc_ring is
> leaked if TX queue base is not aligned. Release it via
> dma_free_coherent.
>
> Fixes: 4d5ae32f5e1e ("net: ethernet: Add a driver for Gemini gigabit ethernet")
> Signed-off-by: Navid Emamdoost <navid.emamdoost@gmail.com>
Looks correct to me,
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Yours,
Linus Walleij
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] net: gemini: Fix memory leak in gmac_setup_txqs
2019-12-15 1:10 [PATCH] net: gemini: Fix memory leak in gmac_setup_txqs Navid Emamdoost
2019-12-15 14:27 ` Markus Elfring
2019-12-16 10:20 ` Linus Walleij
@ 2019-12-17 0:27 ` David Miller
2 siblings, 0 replies; 4+ messages in thread
From: David Miller @ 2019-12-17 0:27 UTC (permalink / raw)
To: navid.emamdoost
Cc: ulli.kroll, linus.walleij, mirq-linux, linux-arm-kernel, netdev,
linux-kernel, emamd001
From: Navid Emamdoost <navid.emamdoost@gmail.com>
Date: Sat, 14 Dec 2019 19:10:44 -0600
> In the implementation of gmac_setup_txqs() the allocated desc_ring is
> leaked if TX queue base is not aligned. Release it via
> dma_free_coherent.
>
> Fixes: 4d5ae32f5e1e ("net: ethernet: Add a driver for Gemini gigabit ethernet")
> Signed-off-by: Navid Emamdoost <navid.emamdoost@gmail.com>
Applied and queued up for -stable, thanks.
^ permalink raw reply [flat|nested] 4+ messages in thread
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2019-12-15 1:10 [PATCH] net: gemini: Fix memory leak in gmac_setup_txqs Navid Emamdoost
2019-12-15 14:27 ` Markus Elfring
2019-12-16 10:20 ` Linus Walleij
2019-12-17 0:27 ` David Miller
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