[PATCH v2] HID: wacom: replace sprintf calls with safer alternatives

[Nehuen Lian Bova <nehuenlian.kernel@gmail.com>]

Replace sprintf() calls with sysfs_emit() and snprintf() calls in
wacom_sys.c, which are safer and avoid buffer overflows.
Also include the header '<linux/sysfs.h>'

Signed-off-by: Nehuen Lian Bova <nehuenlian.kernel@gmail.com>
---
Changes in v2:
- Use snprintf() instead of sysfs_emit() in __wacom_initialize_battery()
  as suggested by Sashiko bot.
 drivers/hid/wacom_sys.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/hid/wacom_sys.c b/drivers/hid/wacom_sys.c
index 628372ab818a..bb5bb9c15f93 100644
--- a/drivers/hid/wacom_sys.c
+++ b/drivers/hid/wacom_sys.c
@@ -6,6 +6,7 @@
 #include "wacom_wac.h"
 #include "wacom.h"
 #include <linux/input/mt.h>
+#include <linux/sysfs.h>
 
 #define WAC_MSG_RETRIES		5
 #define WAC_CMD_RETRIES		10
@@ -1838,7 +1839,7 @@ static int __wacom_initialize_battery(struct wacom *wacom,
 	bat_desc->properties = wacom_battery_props;
 	bat_desc->num_properties = ARRAY_SIZE(wacom_battery_props);
 	bat_desc->get_property = wacom_battery_get_property;
-	sprintf(battery->bat_name, "wacom_battery_%ld", n);
+	snprintf(battery->bat_name, "wacom_battery_%ld", n);
 	bat_desc->name = battery->bat_name;
 	bat_desc->type = POWER_SUPPLY_TYPE_BATTERY;
 	bat_desc->use_for_apm = 0;
@@ -1928,7 +1929,7 @@ static ssize_t wacom_show_remote_mode(struct kobject *kobj,
 	u8 mode;
 
 	mode = wacom->led.groups[index].select;
-	return sprintf(buf, "%d\n", mode < 3 ? mode : -1);
+	return sysfs_emit(buf, "%d\n", mode < 3 ? mode : -1);
 }
 
 #define DEVICE_EKR_ATTR_GROUP(SET_ID)					\
-- 
2.43.0