* [PATCH] media: i2c: hi846: Fix memory leak in hi846_parse_dt()
@ 2022-09-19 2:12 Rafael Mendonca
2022-09-19 14:47 ` Tommaso Merciai
2022-09-20 9:28 ` Martin Kepplinger
0 siblings, 2 replies; 3+ messages in thread
From: Rafael Mendonca @ 2022-09-19 2:12 UTC (permalink / raw)
To: Martin Kepplinger, Mauro Carvalho Chehab, Sakari Ailus, Pavel Machek
Cc: Rafael Mendonca, Mauro Carvalho Chehab, linux-media, linux-kernel
If any of the checks related to the supported link frequencies fail, then
the V4L2 fwnode resources don't get released before returning, which leads
to a memleak. Fix this by properly freeing the V4L2 fwnode data in a
designated label.
Fixes: e8c0882685f9 ("media: i2c: add driver for the SK Hynix Hi-846 8M pixel camera")
Signed-off-by: Rafael Mendonca <rafaelmendsr@gmail.com>
---
drivers/media/i2c/hi846.c | 14 ++++++++++----
1 file changed, 10 insertions(+), 4 deletions(-)
diff --git a/drivers/media/i2c/hi846.c b/drivers/media/i2c/hi846.c
index ad35c3ff3611..254031503c72 100644
--- a/drivers/media/i2c/hi846.c
+++ b/drivers/media/i2c/hi846.c
@@ -2008,22 +2008,24 @@ static int hi846_parse_dt(struct hi846 *hi846, struct device *dev)
bus_cfg.bus.mipi_csi2.num_data_lanes != 4) {
dev_err(dev, "number of CSI2 data lanes %d is not supported",
bus_cfg.bus.mipi_csi2.num_data_lanes);
- v4l2_fwnode_endpoint_free(&bus_cfg);
- return -EINVAL;
+ ret = -EINVAL;
+ goto check_hwcfg_error;
}
hi846->nr_lanes = bus_cfg.bus.mipi_csi2.num_data_lanes;
if (!bus_cfg.nr_of_link_frequencies) {
dev_err(dev, "link-frequency property not found in DT\n");
- return -EINVAL;
+ ret = -EINVAL;
+ goto check_hwcfg_error;
}
/* Check that link frequences for all the modes are in device tree */
fq = hi846_check_link_freqs(hi846, &bus_cfg);
if (fq) {
dev_err(dev, "Link frequency of %lld is not supported\n", fq);
- return -EINVAL;
+ ret = -EINVAL;
+ goto check_hwcfg_error;
}
v4l2_fwnode_endpoint_free(&bus_cfg);
@@ -2044,6 +2046,10 @@ static int hi846_parse_dt(struct hi846 *hi846, struct device *dev)
}
return 0;
+
+check_hwcfg_error:
+ v4l2_fwnode_endpoint_free(&bus_cfg);
+ return ret;
}
static int hi846_probe(struct i2c_client *client)
--
2.34.1
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: [PATCH] media: i2c: hi846: Fix memory leak in hi846_parse_dt()
2022-09-19 2:12 [PATCH] media: i2c: hi846: Fix memory leak in hi846_parse_dt() Rafael Mendonca
@ 2022-09-19 14:47 ` Tommaso Merciai
2022-09-20 9:28 ` Martin Kepplinger
1 sibling, 0 replies; 3+ messages in thread
From: Tommaso Merciai @ 2022-09-19 14:47 UTC (permalink / raw)
To: Rafael Mendonca
Cc: Martin Kepplinger, Mauro Carvalho Chehab, Sakari Ailus,
Pavel Machek, Mauro Carvalho Chehab, linux-media, linux-kernel
Hi Rafael,
On Sun, Sep 18, 2022 at 11:12:51PM -0300, Rafael Mendonca wrote:
> If any of the checks related to the supported link frequencies fail, then
> the V4L2 fwnode resources don't get released before returning, which leads
> to a memleak. Fix this by properly freeing the V4L2 fwnode data in a
> designated label.
>
> Fixes: e8c0882685f9 ("media: i2c: add driver for the SK Hynix Hi-846 8M pixel camera")
> Signed-off-by: Rafael Mendonca <rafaelmendsr@gmail.com>
> ---
> drivers/media/i2c/hi846.c | 14 ++++++++++----
> 1 file changed, 10 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/media/i2c/hi846.c b/drivers/media/i2c/hi846.c
> index ad35c3ff3611..254031503c72 100644
> --- a/drivers/media/i2c/hi846.c
> +++ b/drivers/media/i2c/hi846.c
> @@ -2008,22 +2008,24 @@ static int hi846_parse_dt(struct hi846 *hi846, struct device *dev)
> bus_cfg.bus.mipi_csi2.num_data_lanes != 4) {
> dev_err(dev, "number of CSI2 data lanes %d is not supported",
> bus_cfg.bus.mipi_csi2.num_data_lanes);
> - v4l2_fwnode_endpoint_free(&bus_cfg);
> - return -EINVAL;
> + ret = -EINVAL;
> + goto check_hwcfg_error;
> }
>
> hi846->nr_lanes = bus_cfg.bus.mipi_csi2.num_data_lanes;
>
> if (!bus_cfg.nr_of_link_frequencies) {
> dev_err(dev, "link-frequency property not found in DT\n");
> - return -EINVAL;
> + ret = -EINVAL;
> + goto check_hwcfg_error;
> }
>
> /* Check that link frequences for all the modes are in device tree */
> fq = hi846_check_link_freqs(hi846, &bus_cfg);
> if (fq) {
> dev_err(dev, "Link frequency of %lld is not supported\n", fq);
> - return -EINVAL;
> + ret = -EINVAL;
> + goto check_hwcfg_error;
> }
>
> v4l2_fwnode_endpoint_free(&bus_cfg);
> @@ -2044,6 +2046,10 @@ static int hi846_parse_dt(struct hi846 *hi846, struct device *dev)
> }
>
> return 0;
> +
> +check_hwcfg_error:
> + v4l2_fwnode_endpoint_free(&bus_cfg);
> + return ret;
> }
>
> static int hi846_probe(struct i2c_client *client)
> --
> 2.34.1
>
Looks good to me.
Reviewed-by: Tommaso Merciai <tommaso.merciai@amarulasolutions.com>
Regards,
Tommaso
--
Tommaso Merciai
Embedded Linux Engineer
tommaso.merciai@amarulasolutions.com
__________________________________
Amarula Solutions SRL
Via Le Canevare 30, 31100 Treviso, Veneto, IT
T. +39 042 243 5310
info@amarulasolutions.com
www.amarulasolutions.com
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: [PATCH] media: i2c: hi846: Fix memory leak in hi846_parse_dt()
2022-09-19 2:12 [PATCH] media: i2c: hi846: Fix memory leak in hi846_parse_dt() Rafael Mendonca
2022-09-19 14:47 ` Tommaso Merciai
@ 2022-09-20 9:28 ` Martin Kepplinger
1 sibling, 0 replies; 3+ messages in thread
From: Martin Kepplinger @ 2022-09-20 9:28 UTC (permalink / raw)
To: Rafael Mendonca, Mauro Carvalho Chehab, Sakari Ailus, Pavel Machek
Cc: Mauro Carvalho Chehab, linux-media, linux-kernel
Am Sonntag, dem 18.09.2022 um 23:12 -0300 schrieb Rafael Mendonca:
> If any of the checks related to the supported link frequencies fail,
> then
> the V4L2 fwnode resources don't get released before returning, which
> leads
> to a memleak. Fix this by properly freeing the V4L2 fwnode data in a
> designated label.
>
> Fixes: e8c0882685f9 ("media: i2c: add driver for the SK Hynix Hi-846
> 8M pixel camera")
> Signed-off-by: Rafael Mendonca <rafaelmendsr@gmail.com>
> ---
> drivers/media/i2c/hi846.c | 14 ++++++++++----
> 1 file changed, 10 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/media/i2c/hi846.c b/drivers/media/i2c/hi846.c
> index ad35c3ff3611..254031503c72 100644
> --- a/drivers/media/i2c/hi846.c
> +++ b/drivers/media/i2c/hi846.c
> @@ -2008,22 +2008,24 @@ static int hi846_parse_dt(struct hi846
> *hi846, struct device *dev)
> bus_cfg.bus.mipi_csi2.num_data_lanes != 4) {
> dev_err(dev, "number of CSI2 data lanes %d is not
> supported",
> bus_cfg.bus.mipi_csi2.num_data_lanes);
> - v4l2_fwnode_endpoint_free(&bus_cfg);
> - return -EINVAL;
> + ret = -EINVAL;
> + goto check_hwcfg_error;
> }
>
> hi846->nr_lanes = bus_cfg.bus.mipi_csi2.num_data_lanes;
>
> if (!bus_cfg.nr_of_link_frequencies) {
> dev_err(dev, "link-frequency property not found in
> DT\n");
> - return -EINVAL;
> + ret = -EINVAL;
> + goto check_hwcfg_error;
> }
>
> /* Check that link frequences for all the modes are in device
> tree */
> fq = hi846_check_link_freqs(hi846, &bus_cfg);
> if (fq) {
> dev_err(dev, "Link frequency of %lld is not
> supported\n", fq);
> - return -EINVAL;
> + ret = -EINVAL;
> + goto check_hwcfg_error;
> }
>
> v4l2_fwnode_endpoint_free(&bus_cfg);
> @@ -2044,6 +2046,10 @@ static int hi846_parse_dt(struct hi846 *hi846,
> struct device *dev)
> }
>
> return 0;
> +
> +check_hwcfg_error:
> + v4l2_fwnode_endpoint_free(&bus_cfg);
> + return ret;
> }
>
> static int hi846_probe(struct i2c_client *client)
thank you very much for the patch. lgtm,
Reviewed-by: Martin Kepplinger <martink@posteo.de>
martin
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2022-09-20 9:28 UTC | newest]
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2022-09-19 2:12 [PATCH] media: i2c: hi846: Fix memory leak in hi846_parse_dt() Rafael Mendonca
2022-09-19 14:47 ` Tommaso Merciai
2022-09-20 9:28 ` Martin Kepplinger
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