staging: vc04_services: use snprintf instead of sprintf

All the occurrences of sprintf usage under vc04_services can be safely
replaced by snprintf, so as to avoid any possible overflow.

Suggested-by: Dan Carpenter <dan.carpenter@linaro.org>
Suggested-by: Umang Jain <umang.jain@ideasonboard.com>
Signed-off-by: "Ricardo B. Marliere" <ricardo@marliere.net>
Reviewed-by: Umang Jain <umang.jain@ideasonboard.com>
Link: https://lore.kernel.org/r/20231025122632.307385-4-ricardo@marliere.net
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: rbmarliere

drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c

@@ -855,7 +855,7 @@ static int vidioc_enum_input(struct file *file, void *priv,
 		return -EINVAL;
 
 	inp->type = V4L2_INPUT_TYPE_CAMERA;
-	sprintf((char *)inp->name, "Camera %u", inp->index);
+	snprintf((char *)inp->name, sizeof(inp->name), "Camera %u", inp->index);
 	return 0;
 }
 

drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c

@@ -1451,12 +1451,12 @@ vchiq_use_internal(struct vchiq_state *state, struct vchiq_service *service,
 	}
 
 	if (use_type == USE_TYPE_VCHIQ) {
-		sprintf(entity, "VCHIQ:   ");
+		snprintf(entity, sizeof(entity), "VCHIQ:   ");
 		entity_uc = &arm_state->peer_use_count;
 	} else if (service) {
-		sprintf(entity, "%p4cc:%03d",
-			&service->base.fourcc,
-			service->client_id);
+		snprintf(entity, sizeof(entity), "%p4cc:%03d",
+			 &service->base.fourcc,
+			 service->client_id);
 		entity_uc = &service->service_use_count;
 	} else {
 		vchiq_log_error(state->dev, VCHIQ_SUSPEND, "%s null service ptr", __func__);
@@ -1506,12 +1506,12 @@ vchiq_release_internal(struct vchiq_state *state, struct vchiq_service *service)
 	}
 
 	if (service) {
-		sprintf(entity, "%p4cc:%03d",
-			&service->base.fourcc,
-			service->client_id);
+		snprintf(entity, sizeof(entity), "%p4cc:%03d",
+			 &service->base.fourcc,
+			 service->client_id);
 		entity_uc = &service->service_use_count;
 	} else {
-		sprintf(entity, "PEER:   ");
+		snprintf(entity, sizeof(entity), "PEER:   ");
 		entity_uc = &arm_state->peer_use_count;
 	}