2018-04-05 16:23:15

by Gustavo A. R. Silva

Subject: [PATCH] ieee802154: mcr20a: Fix memory leak in mcr20a_probe

Free allocated memory for pdata before return.

Addresses-Coverity-ID: 1466096 ("Resource leak")
Fixes: 8c6ad9cc5157 ("ieee802154: Add NXP MCR20A IEEE 802.15.4 transceiver driver")
Signed-off-by: Gustavo A. R. Silva <[email protected]>
---
drivers/net/ieee802154/mcr20a.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ieee802154/mcr20a.c b/drivers/net/ieee802154/mcr20a.c
index 55a22c7..944470d 100644
--- a/drivers/net/ieee802154/mcr20a.c
+++ b/drivers/net/ieee802154/mcr20a.c
@@ -1267,7 +1267,7 @@ mcr20a_probe(struct spi_device *spi)
ret = mcr20a_get_platform_data(spi, pdata);
if (ret < 0) {
dev_crit(&spi->dev, "mcr20a_get_platform_data failed.\n");
- return ret;
+ goto free_pdata;
}

/* init reset gpio */
@@ -1275,7 +1275,7 @@ mcr20a_probe(struct spi_device *spi)
ret = devm_gpio_request_one(&spi->dev, pdata->rst_gpio,
GPIOF_OUT_INIT_HIGH, "reset");
if (ret)
- return ret;
+ goto free_pdata;
}

/* reset mcr20a */
@@ -1291,7 +1291,8 @@ mcr20a_probe(struct spi_device *spi)
hw = ieee802154_alloc_hw(sizeof(*lp), &mcr20a_hw_ops);
if (!hw) {
dev_crit(&spi->dev, "ieee802154_alloc_hw failed\n");
- return -ENOMEM;
+ ret = -ENOMEM;
+ goto free_pdata;
}

/* init mcr20a local data */
@@ -1366,6 +1367,8 @@ mcr20a_probe(struct spi_device *spi)

free_dev:
ieee802154_free_hw(lp->hw);
+free_pdata:
+ kfree(pdata);

return ret;
}
--
2.7.4

2018-04-10 09:59:34

by Xue Liu

Subject: Re: [PATCH] ieee802154: mcr20a: Fix memory leak in mcr20a_probe

Hallo,

Thanks for the fix. It looks good.

ACK-by: Xue Liu <[email protected]>

On 5 April 2018 at 18:20, Gustavo A. R. Silva <[email protected]> wrote:
> Free allocated memory for pdata before return.
>
> Addresses-Coverity-ID: 1466096 ("Resource leak")
> Fixes: 8c6ad9cc5157 ("ieee802154: Add NXP MCR20A IEEE 802.15.4 transceiver driver")
> Signed-off-by: Gustavo A. R. Silva <[email protected]>
> ---
> drivers/net/ieee802154/mcr20a.c | 9 ++++++---
> 1 file changed, 6 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/net/ieee802154/mcr20a.c b/drivers/net/ieee802154/mcr20a.c
> index 55a22c7..944470d 100644
> --- a/drivers/net/ieee802154/mcr20a.c
> +++ b/drivers/net/ieee802154/mcr20a.c
> @@ -1267,7 +1267,7 @@ mcr20a_probe(struct spi_device *spi)
> ret = mcr20a_get_platform_data(spi, pdata);
> if (ret < 0) {
> dev_crit(&spi->dev, "mcr20a_get_platform_data failed.\n");
> - return ret;
> + goto free_pdata;
> }
>
> /* init reset gpio */
> @@ -1275,7 +1275,7 @@ mcr20a_probe(struct spi_device *spi)
> ret = devm_gpio_request_one(&spi->dev, pdata->rst_gpio,
> GPIOF_OUT_INIT_HIGH, "reset");
> if (ret)
> - return ret;
> + goto free_pdata;
> }
>
> /* reset mcr20a */
> @@ -1291,7 +1291,8 @@ mcr20a_probe(struct spi_device *spi)
> hw = ieee802154_alloc_hw(sizeof(*lp), &mcr20a_hw_ops);
> if (!hw) {
> dev_crit(&spi->dev, "ieee802154_alloc_hw failed\n");
> - return -ENOMEM;
> + ret = -ENOMEM;
> + goto free_pdata;
> }
>
> /* init mcr20a local data */
> @@ -1366,6 +1367,8 @@ mcr20a_probe(struct spi_device *spi)
>
> free_dev:
> ieee802154_free_hw(lp->hw);
> +free_pdata:
> + kfree(pdata);
>
> return ret;
> }
> --
> 2.7.4
>

2018-04-10 10:30:14

by Stefan Schmidt

Subject: Re: [PATCH] ieee802154: mcr20a: Fix memory leak in mcr20a_probe

Hello.


On 04/10/2018 11:54 AM, Xue Liu wrote:
> Hallo,
>
> Thanks for the fix. It looks good.
>
> ACK-by: Xue Liu <[email protected]>

Thanks for the ACK Xue. The correct format would be

Acked-by: Xue Liu <[email protected]>

That way patchwork also picks the ACK up and adds it to the patch before I apply it from there.

No worries, I did this manually for you this time. For the next time please use the correct format to have this tracked.

regards
Stefan Schmidt

2018-04-10 11:03:17

by Stefan Schmidt

Subject: Re: [PATCH] ieee802154: mcr20a: Fix memory leak in mcr20a_probe

Hello.


On 04/05/2018 06:20 PM, Gustavo A. R. Silva wrote:
> Free allocated memory for pdata before return.
>
> Addresses-Coverity-ID: 1466096 ("Resource leak")
> Fixes: 8c6ad9cc5157 ("ieee802154: Add NXP MCR20A IEEE 802.15.4 transceiver driver")
> Signed-off-by: Gustavo A. R. Silva <[email protected]>
> ---
> drivers/net/ieee802154/mcr20a.c | 9 ++++++---
> 1 file changed, 6 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/net/ieee802154/mcr20a.c b/drivers/net/ieee802154/mcr20a.c
> index 55a22c7..944470d 100644
> --- a/drivers/net/ieee802154/mcr20a.c
> +++ b/drivers/net/ieee802154/mcr20a.c
> @@ -1267,7 +1267,7 @@ mcr20a_probe(struct spi_device *spi)
> ret = mcr20a_get_platform_data(spi, pdata);
> if (ret < 0) {
> dev_crit(&spi->dev, "mcr20a_get_platform_data failed.\n");
> - return ret;
> + goto free_pdata;
> }
>
> /* init reset gpio */
> @@ -1275,7 +1275,7 @@ mcr20a_probe(struct spi_device *spi)
> ret = devm_gpio_request_one(&spi->dev, pdata->rst_gpio,
> GPIOF_OUT_INIT_HIGH, "reset");
> if (ret)
> - return ret;
> + goto free_pdata;
> }
>
> /* reset mcr20a */
> @@ -1291,7 +1291,8 @@ mcr20a_probe(struct spi_device *spi)
> hw = ieee802154_alloc_hw(sizeof(*lp), &mcr20a_hw_ops);
> if (!hw) {
> dev_crit(&spi->dev, "ieee802154_alloc_hw failed\n");
> - return -ENOMEM;
> + ret = -ENOMEM;
> + goto free_pdata;
> }
>
> /* init mcr20a local data */
> @@ -1366,6 +1367,8 @@ mcr20a_probe(struct spi_device *spi)
>
> free_dev:
> ieee802154_free_hw(lp->hw);
> +free_pdata:
> + kfree(pdata);
>
> return ret;
> }

This patch has been applied to the wpan tree and will be
part of the next pull request to net. Thanks!

regards
Stefan Schmidt