Commit feff7273 authored by Pavel Machek's avatar Pavel Machek
Browse files

leds: pattern trigger -- check pattern for validity 



Don't allow invalid brightness in the pattern.

Signed-off-by: default avatarPavel Machek <pavel@ucw.cz>
parent c5437338

drivers/leds/trigger/ledtrig-pattern.c

+4 −2
Original line number Diff line number Diff line
@@ -227,10 +227,12 @@ static int pattern_trig_store_patterns_string(struct pattern_trig_data *data, 


	while (offset < count - 1 && data->npatterns < MAX_PATTERNS) {

		cr = 0;

		ccount = sscanf(buf + offset, "%d %u %n",

		ccount = sscanf(buf + offset, "%u %u %n",

				&data->patterns[data->npatterns].brightness,

				&data->patterns[data->npatterns].delta_t, &cr);

		if (ccount != 2) {



		if (ccount != 2 ||

		    data->patterns[data->npatterns].brightness > data->led_cdev->max_brightness) {

			data->npatterns = 0;

			return -EINVAL;

		}