| Message ID | 20220928075913.64125-1-marcus.folkesson@gmail.com (mailing list archive) |
|---|---|
| State | Handled Elsewhere |
| Headers | show |
| Series | HID: hid-sensor-custom: set fixed size for custom attributes | expand |
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},
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},
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(-)