* [PATCH] HID: hid-sensor-custom: set fixed size for custom attributes
@ 2022-09-28 7:59 Marcus Folkesson
2022-10-02 13:30 ` Jonathan Cameron
0 siblings, 1 reply; 2+ messages in thread
From: Marcus Folkesson @ 2022-09-28 7:59 UTC (permalink / raw)
To: Jiri Kosina, Jonathan Cameron, Srinivas Pandruvada,
Benjamin Tissoires
Cc: linux-input, linux-iio, linux-kernel, Marcus Folkesson
This is no bugfix (so no Fixes: tag is necessary) as it is
taken care of in hid_sensor_custom_add_attributes().
The motivation for this patch is that:
hid_sensor_custom_field.attr_name and
hid_sensor_custom_field.attrs
has the size of HID_CUSTOM_TOTAL_ATTRS and used in same context.
We compare against HID_CUSTOM_TOTAL_ATTRS when
looping through hid_custom_attrs.
We will silent the smatch error:
hid_sensor_custom_add_attributes() error: buffer overflow
'hid_custom_attrs' 8 <= 10
Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com>
---
drivers/hid/hid-sensor-custom.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/hid/hid-sensor-custom.c b/drivers/hid/hid-sensor-custom.c
index 32c2306e240d..602465ad2745 100644
--- a/drivers/hid/hid-sensor-custom.c
+++ b/drivers/hid/hid-sensor-custom.c
@@ -62,7 +62,7 @@ struct hid_sensor_sample {
u32 raw_len;
} __packed;
-static struct attribute hid_custom_attrs[] = {
+static struct attribute hid_custom_attrs[HID_CUSTOM_TOTAL_ATTRS] = {
{.name = "name", .mode = S_IRUGO},
{.name = "units", .mode = S_IRUGO},
{.name = "unit-expo", .mode = S_IRUGO},
--
2.37.1
^ permalink raw reply related [flat|nested] 2+ messages in thread* Re: [PATCH] HID: hid-sensor-custom: set fixed size for custom attributes
2022-09-28 7:59 [PATCH] HID: hid-sensor-custom: set fixed size for custom attributes Marcus Folkesson
@ 2022-10-02 13:30 ` Jonathan Cameron
0 siblings, 0 replies; 2+ messages in thread
From: Jonathan Cameron @ 2022-10-02 13:30 UTC (permalink / raw)
To: Marcus Folkesson
Cc: Jiri Kosina, Srinivas Pandruvada, Benjamin Tissoires, linux-input,
linux-iio, linux-kernel
On Wed, 28 Sep 2022 09:59:13 +0200
Marcus Folkesson <marcus.folkesson@gmail.com> wrote:
> This is no bugfix (so no Fixes: tag is necessary) as it is
> taken care of in hid_sensor_custom_add_attributes().
>
> The motivation for this patch is that:
> hid_sensor_custom_field.attr_name and
> hid_sensor_custom_field.attrs
> has the size of HID_CUSTOM_TOTAL_ATTRS and used in same context.
>
> We compare against HID_CUSTOM_TOTAL_ATTRS when
> looping through hid_custom_attrs.
>
> We will silent the smatch error:
> hid_sensor_custom_add_attributes() error: buffer overflow
> 'hid_custom_attrs' 8 <= 10
>
> Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com>
Slightly ugly fix, but I guess it's the easiest solution.
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
> ---
> drivers/hid/hid-sensor-custom.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/hid/hid-sensor-custom.c b/drivers/hid/hid-sensor-custom.c
> index 32c2306e240d..602465ad2745 100644
> --- a/drivers/hid/hid-sensor-custom.c
> +++ b/drivers/hid/hid-sensor-custom.c
> @@ -62,7 +62,7 @@ struct hid_sensor_sample {
> u32 raw_len;
> } __packed;
>
> -static struct attribute hid_custom_attrs[] = {
> +static struct attribute hid_custom_attrs[HID_CUSTOM_TOTAL_ATTRS] = {
> {.name = "name", .mode = S_IRUGO},
> {.name = "units", .mode = S_IRUGO},
> {.name = "unit-expo", .mode = S_IRUGO},
^ permalink raw reply [flat|nested] 2+ messages in thread
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2022-09-28 7:59 [PATCH] HID: hid-sensor-custom: set fixed size for custom attributes Marcus Folkesson
2022-10-02 13:30 ` Jonathan Cameron
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